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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Consolidated Statements of Changes in Shareholders' Equity |  |  |
Share-based compensation arrangements, tax benefit | $ 10,360 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | $ 10,771 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | $ 6,081 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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