Income Taxes (Income Tax Expense Difference) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Tax expense at Federal statutory income tax rate	$ 28,144	$ 17,110	$ 7,928
International tax rate differential	(6,772)	(2,541)	(209)
Foreign source income, net of tax credits	5,195	(786)	(3,428)
Unrecognized tax benefits	603	(2,197)	1,604
General business credits	(604)	(702)	0
Effective Income Tax Rate Reconciliation, Acquisition Related Costs	590	0	0
Valuation allowance change	388	0	(52,650)
Other	(17)	342	271
Total	$ 27,527us-gaap_IncomeTaxExpenseBenefit	$ 11,226us-gaap_IncomeTaxExpenseBenefit	$ (46,484)us-gaap_IncomeTaxExpenseBenefit

Effective Income Tax Rate Reconciliation, Acquisition Related Costs

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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