CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands |
Total |
Repurchases of common stock |
Sub-share Certificates |
Common Stock |
Treasury Stock |
Additional Paid-in Capital |
Accum. Other Comp. Inc/(Loss) |
Retained Earnings |
Net Proceeds From All Sources |
Net Proceeds From All Sources
Repurchases of common stock
|
|---|---|---|---|---|---|---|---|---|---|---|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Beginning balance, treasury stock (in shares) | Ìý | Ìý | Ìý | Ìý | 0 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Beginning balance (in shares) at Dec. 31, 2019 | Ìý | Ìý | 7,756,156 | 0 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Beginning balance at Dec. 31, 2019 | $ 512,137 | $ (110) | Ìý | $ 0 | $ 0 | $ 0 | $ (1,461) | $ 0 | $ 513,598 | $ (110) |
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Net income | 176,049 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 176,049 | Ìý |
| Periodic pension costs, net of income taxes | (1,232) | Ìý | Ìý | Ìý | Ìý | Ìý | (1,232) | Ìý | Ìý | Ìý |
| Dividends paid | (77,561) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (77,561) | Ìý |
| Special dividends paid | (124,099) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (124,099) | Ìý |
| Ending balance (in shares) at Dec. 31, 2020 | Ìý | Ìý | 7,756,156 | 0 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Ending balance at Dec. 31, 2020 | 485,184 | Ìý | Ìý | $ 0 | $ 0 | 0 | (2,693) | 0 | 487,877 | Ìý |
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Beginning balance, treasury stock (in shares) | Ìý | Ìý | Ìý | Ìý | 0 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Net income | 269,980 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 269,980 | Ìý | Ìý |
| Periodic pension costs, net of income taxes | $ 1,686 | Ìý | Ìý | Ìý | Ìý | Ìý | 1,686 | Ìý | Ìý | Ìý |
| Repurchase of common stock (in shares) | (14,791) | Ìý | Ìý | Ìý | (14,791) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Repurchases of common stock | Ìý | $ (19,903) | Ìý | Ìý | $ (19,903) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Dividends paid | $ (85,264) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (85,264) | Ìý | Ìý |
| Conversion of sub-shares into shares of common stock (in shares) | 7,756,156 | Ìý | (7,756,156) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Conversion of Sub-shares into shares of common stock | $ 0 | Ìý | Ìý | $ 78 | Ìý | Ìý | Ìý | 487,799 | (487,877) | Ìý |
| Share-based compensation, net of forfeitures | 28 | Ìý | Ìý | Ìý | $ 4,486 | 28 | Ìý | (4,486) | Ìý | Ìý |
| Share-based compensation, net of forfeitures (in shares) | Ìý | Ìý | Ìý | 3,330 | (3,330) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Ending balance (in shares) at Dec. 31, 2021 | Ìý | Ìý | 0 | 7,744,695 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Ending balance at Dec. 31, 2021 | $ 651,711 | Ìý | Ìý | $ 78 | $ (15,417) | 28 | (1,007) | 668,029 | 0 | Ìý |
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Beginning balance, treasury stock (in shares) | 11,461 | Ìý | Ìý | Ìý | 11,461 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Net income | $ 446,362 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 446,362 | Ìý | Ìý |
| Periodic pension costs, net of income taxes | 3,523 | Ìý | Ìý | Ìý | Ìý | Ìý | 3,523 | Ìý | Ìý | Ìý |
| Shares exchanged for tax withholdings (in shares) | Ìý | Ìý | Ìý | (756) | (756) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Shares exchanged for tax withholdings | (1,762) | Ìý | Ìý | Ìý | $ (1,762) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Repurchase of common stock (in shares) | Ìý | Ìý | Ìý | (48,959) | (48,959) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Repurchases of common stock | (87,900) | Ìý | Ìý | Ìý | $ (87,900) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Dividends paid | (92,737) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (92,737) | Ìý | Ìý |
| Special dividends paid | (154,742) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (154,742) | Ìý | Ìý |
| Share-based compensation, net of forfeitures | 8,432 | Ìý | Ìý | Ìý | $ 940 | 8,265 | Ìý | (773) | Ìý | Ìý |
| Share-based compensation, net of forfeitures (in shares) | Ìý | Ìý | Ìý | 699 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Share-based compensation, forfeitures (in shares) | Ìý | Ìý | Ìý | Ìý | (699) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Ending balance (in shares) at Dec. 31, 2022 | Ìý | Ìý | 0 | 7,695,679 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Ending balance at Dec. 31, 2022 | $ 772,887 | Ìý | Ìý | $ 78 | $ (104,139) | $ 8,293 | $ 2,516 | $ 866,139 | $ 0 | Ìý |
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Beginning balance, treasury stock (in shares) | 60,477 | Ìý | Ìý | Ìý | 60,477 | Ìý | Ìý | Ìý | Ìý | Ìý |
| X | ||||||||||
- Definition Amount of paid and unpaid special cash dividends declared for classes of stock, for example, but not limited to, common and preferred. No definition available.
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| X | ||||||||||
- Definition Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement. No definition available.
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| X | ||||||||||
- Definition Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of shares issued which are neither cancelled nor held in the treasury. No definition available.
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| X | ||||||||||
- Definition Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement. No definition available.
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| X | ||||||||||
- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares (or other type of equity) forfeited during the period. No definition available.
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| X | ||||||||||
- Definition The gross value of stock issued during the period upon the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares that have been repurchased and retired during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Number of previously issued common shares repurchased by the issuing entity and held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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