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Income Taxes (Components of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current and Deferred Portion of Income Tax Expense:
Current income tax expense	$ 69,693us-gaap_CurrentIncomeTaxExpenseBenefit	$ 22,382us-gaap_CurrentIncomeTaxExpenseBenefit	$ 12,062us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred income tax (benefit) expense	(18,268)us-gaap_DeferredIncomeTaxExpenseBenefit	1,041us-gaap_DeferredIncomeTaxExpenseBenefit	(683)us-gaap_DeferredIncomeTaxExpenseBenefit
Total income tax expense	$ 51,425us-gaap_IncomeTaxExpenseBenefit	$ 23,423us-gaap_IncomeTaxExpenseBenefit	$ 11,379us-gaap_IncomeTaxExpenseBenefit

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.