Accumulated Other Comprehensive Income (Reclassification out of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	$ (185)	$ (42)	$ (505)	$ (203)
Income Tax Expense (Benefit)	4,292	11,823	12,483	17,323
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	(33)		(16)
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	(33)		(16)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock [Line Items]
Other expense (income), net	(52)		26
Income Tax Expense (Benefit)	$ 19		$ 10