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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Stock awards excluded from the calculation of diluted EPS |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Year ended December 31,
﻿ | 2016 |  | 2015 |  | 2014
﻿Stock awards subject to performance conditions |  | 263 |  |  | 266 |  |  | 385
﻿Stock awards that were antidilutive |  | 1,316 |  |  | 289 |  |  | 232
﻿Total stock awards excluded from diluted earnings per share |  | 1,579 |  |  | 555 |  |  | 617
﻿
Earnings Per Share |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Year ended December 31,
﻿ | 2016 |  | 2015 |  | 2014
﻿Net income | $ | 22,938 |  | $ | 475,602 |  | $ | 445,374
﻿Shares: |  |  |  |  |  |  |  |
﻿Weighted average number of common shares outstanding |  | 29,265 |  |  | 31,092 |  |  | 31,038
﻿Dilutive stock awards |  | 505 |  |  | 402 |  |  | 474
﻿Diluted weighted average number of common shares outstanding |  | 29,770 |  |  | 31,494 |  |  | 31,512
﻿Basic earnings per share | $ | 0.78 |  | $ | 15.30 |  | $ | 14.35
﻿Diluted earnings per share | $ | 0.77 |  | $ | 15.10 |  | $ | 14.13
﻿

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- Definition Stock awards excluded from the calculation of diluted EPS - consisting of awards subject to performance conditions and awards that were antidilutive. + References No definition available. + Details
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- References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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