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Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Data [Abstract] |
Summary Of Quarterly Financial Data |
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﻿ |  |  |  |  | 2016
﻿ |  |  |  |  | March 31 |  | June 30 |  | September 30 |  | December 31
﻿Revenue |  |  |  |  | $ | 834,459 |  | $ | 998,383 |  | $ | 1,036,982 |  | $ | 1,034,560
﻿Operating income (loss) |  |  |  |  | $ | (46,604) |  | $ | 40,895 |  | $ | 9,726 |  | $ | 30,550
﻿Net income (loss) |  |  |  |  | $ | (26,432) |  | $ | 25,596 |  | $ | 7,799 |  | $ | 15,975
﻿Basic earnings (loss) per share |  |  |  |  | $ | (0.88) |  | $ | 0.88 |  | $ | 0.27 |  | $ | 0.55
﻿Diluted earnings (loss) per share |  |  |  |  | $ | (0.88) |  | $ | 0.87 |  | $ | 0.27 |  | $ | 0.55
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﻿ |  |  |  |  | 2015
﻿ |  |  |  |  | March 31 |  | June 30 |  | September 30 |  | December 31
﻿Revenue |  |  |  |  | $ | 1,089,043 |  | $ | 1,197,783 |  | $ | 1,216,890 |  | $ | 997,507
﻿Operating income |  |  |  |  | $ | 197,801 |  | $ | 227,416 |  | $ | 234,759 |  | $ | 103,613
﻿Net income |  |  |  |  | $ | 122,641 |  | $ | 140,204 |  | $ | 144,883 |  | $ | 67,874
﻿Basic earnings per share |  |  |  |  | $ | 3.95 |  | $ | 4.51 |  | $ | 4.65 |  | $ | 2.19
﻿Diluted earnings per share |  |  |  |  | $ | 3.88 |  | $ | 4.45 |  | $ | 4.59 |  | $ | 2.17
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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=51825399&loc=d3e1280-108306 + Details
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