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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Computations Of Basic And Diluted Earnings Per Share | The computations of basic and diluted EPS for the years ended December 31, 2016, 2015 and 2014 were as follows:
﻿ |  |  |  |  |  |  |  |
﻿ | Year Ended December 31,
﻿ | 2016 |  | 2015 |  | 2014
﻿Net income for the computation of basic EPS | $ | 1,046,630 |  | $ | 1,178,730 |  | $ | 810,447
﻿Weighted average ordinary shares outstanding - basic |  | 185,514,370 |  |  | 203,850,828 |  |  | 175,912,662
﻿Basic EPS | $ | 5.64 |  | $ | 5.78 |  | $ | 4.61
﻿ |  |  |  |  |  |  |  |
﻿ | Year Ended December 31,
﻿ | 2016 |  | 2015 |  | 2014
﻿Net income for the computation of diluted EPS | $ | 1,046,630 |  | $ | 1,178,730 |  | $ | 810,447
﻿Weighted average ordinary shares outstanding - diluted |  | 189,682,036 |  |  | 206,224,135 |  |  | 178,684,989
﻿Diluted EPS | $ | 5.52 |  | $ | 5.72 |  | $ | 4.54
﻿
Computation Of Ordinary Shares Outstanding, Excluding Unvested Restricted Stock | The computations of ordinary shares outstanding, excluding unvested restricted stock, as of December 31, 2016, 2015 and 2014 were as follows: ﻿
﻿ |  |  |  |  |
﻿ | As of December 31,
﻿ | 2016 |  | 2015 |  | 2014
﻿ | Number of ordinary shares
﻿Ordinary shares issued | 187,847,345 |  | 203,411,207 |  | 212,318,291
﻿Treasury shares | (11,600,191) |  | (3,069,003) |  | —
﻿Ordinary shares outstanding | 176,247,154 |  | 200,342,204 |  | 212,318,291
﻿Unvested restricted stock | (3,426,810) |  | (3,030,724) |  | (232,140)
﻿Ordinary shares outstanding, excluding unvested restricted stock | 172,820,344 |  | 197,311,480 |  | 212,086,151
﻿

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- Definition Computation Of Outstanding Shares For Basic EPS [Table Text Block] + 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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