CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY | |||
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 |
| Issuance of restricted share awards under long-term equity incentive plan (in shares) | 76,041 | 129,870 | 90,760 |
| Repurchase of shares pursuant to the settlement of ASR Agreement (in shares) | 73,455 | 176,327 | 13,657 |
| Repurchase of shares (in shares) | 542,772 | 722,943 | 252,946 |
| Repurchase of shares of common stock pursuant to Accelerated Share Repurchase Program (in shares) | 392,501 | 796,925 | |
| Number of shares withheld to pay taxes on employees' equity awards (in shares) | 142,822 | 228,916 | 98,056 |
| Shares issued upon exercise of stock options (in shares) | 19,242 | ||
| X | ||||||||||
- Definition Number of shares that have been repurchased during the period pursuant to the Accelerated Share Repurchase Program and are being held in treasury. No definition available.
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- Definition Number of shares that have been repurchased during the period pursuant to the settlement of a Accelerated Share Repurchase Program. No definition available.
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- Definition Number of shares that have been repurchased during the period pursuant to the Share Repurchase Program and are being held in treasury. No definition available.
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| X | ||||||||||
- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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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- References No definition available.
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- Definition Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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