XML 33 R22.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Earnings Per Share (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2016
Earnings Per Share [Abstract] |
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Text Block] | The following table sets forth the computation of basic and diluted earnings per share on net income (in thousands, except per share information):
|  | Three months ended June 30, |  | Six months ended June 30,
|  | 2016 |  | 2015 |  | 2016 |  | 2015
Earnings: |  |  |  |  |  |  |  |
Net income (numerator for basic and diluted calculations) |  | $ | 236,103 |  |  | $ | 130,391 |  |  | $ | 312,575 |  |  | $ | 255,505 |
Shares: |  |  |  |  |  |  |  |
Weighted average outstanding shares (denominator for basic calculation) |  | 64,126 |  |  | 66,351 |  |  | 64,348 |  |  | 67,246 |
Equivalent shares from outstanding stock options |  | 670 |  |  | 769 |  |  | 660 |  |  | 785 |
Denominator for diluted calculation |  | 64,796 |  |  | 67,120 |  |  | 65,008 |  |  | 68,031 |
Earnings per share: |  |  |  |  |  |  |  |
Basic |  | $ | 3.68 |  |  | $ | 1.97 |  |  | $ | 4.86 |  |  | $ | 3.80 |
Diluted |  | $ | 3.64 |  |  | $ | 1.94 |  |  | $ | 4.81 |  |  | $ | 3.76 |

X
- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration