Earnings Per Share (Tables)	12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]
Basic And Diluted Earnings Per Share	Year ended December 31, 2021 2020 2019Net income$ 652,984 $ 355,766 $ 350,158Shares: Weighted-average number of common shares outstanding (for basic calculation) 28,132 27,917 27,740Dilutive stock awards 379 499 555Weighted-average number of common shares outstanding (for diluted calculation) 28,511 28,416 28,295Basic earnings per share$ 23.21 $ 12.74 $ 12.62Diluted earnings per share$ 22.90 $ 12.52 $ 12.38
Stock Awards Excluded From The Calculation Of Diluted EPS	Year ended December 31, 2021 2020 2019Stock awards subject to performance conditions 66 87 81Stock awards that were antidilutive 34 57 139Total stock awards excluded from diluted earnings per share 100 144 220

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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