Accumulated Other Comprehensive Income (Reclassification out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	$ 1,086	$ 251	$ 390	$ (254)
Income Tax Expense (Benefit)	7,013	$ 7,345	16,317	$ 19,828
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	2		(11)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0		0
Other Comprehensive Income Loss Reclassification Adjustments Total Net of Tax	2		(11)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	3		18
Income Tax Expense (Benefit)	$ (1)		$ 7