Comprehensive Income (Changes in Accumulated Other Comprehensive Loss by Component) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013			$ 4,951
Other comprehensive (loss) income before reclassifications			(20,041)
Amounts reclassified from accumulated other comprehensive (loss) income			(5,409)
Other comprehensive (loss) income	(22,251)	13,753	(25,450)	4,483
Balance at September 30, 2014	(20,499)		(20,499)
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013			5,458
Other comprehensive (loss) income before reclassifications			(15,617)
Amounts reclassified from accumulated other comprehensive (loss) income			0
Other comprehensive (loss) income			(15,617)
Balance at September 30, 2014	(10,159)		(10,159)
Unrealized Gain on Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013			1,238
Other comprehensive (loss) income before reclassifications			(182)
Amounts reclassified from accumulated other comprehensive (loss) income			(961)
Other comprehensive (loss) income			(1,143)
Balance at September 30, 2014	95		95
Unrealized Gain on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013			2,852
Other comprehensive (loss) income before reclassifications			(4,197)
Amounts reclassified from accumulated other comprehensive (loss) income			(4,448)
Other comprehensive (loss) income			(8,645)
Balance at September 30, 2014	(5,793)		(5,793)
Other Comprehensive Loss on Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013			(4,597)
Other comprehensive (loss) income before reclassifications			(45)
Amounts reclassified from accumulated other comprehensive (loss) income			0
Other comprehensive (loss) income			(45)
Balance at September 30, 2014	$ (4,642)		$ (4,642)