Annual report pursuant to Section 13 and 15(d)

Consolidated Statements Of Shareholders' Equity (Parenthetical)

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Consolidated Statements Of Shareholders' Equity (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]      
Issuance of common stock from stock-based compensation awards, tax benefit $ 8,293us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet $ 9,788us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet $ 18,900us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet