Accumulated Other Comprehensive Income (Reclassification out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	$ (213)	$ 88	$ (87)	$ (696)
Income Tax Expense (Benefit)	15,087	$ 181	28,123	$ 9,304
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	44		43
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	44		43
Accumulated Net Unrealized Investment Gain (Loss) [Member]
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	70		(69)
Income Tax Expense (Benefit)	$ (26)		$ (26)