Comprehensive Income (Changes in Accumulated Other Comprehensive Loss by Component) (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
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013			$ 4,951
Other comprehensive (loss) income before reclassifications			614
Amounts reclassified from accumulated other comprehensive income			(3,813)
Other comprehensive (loss) income	(2,498)	1,266	(3,199)	(9,270)
Balance at June 30, 2014	1,752		1,752
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013			5,458
Other comprehensive (loss) income before reclassifications			(2,727)
Amounts reclassified from accumulated other comprehensive income			0
Other comprehensive (loss) income			(2,727)
Balance at June 30, 2014	2,731		2,731
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			729
Amounts reclassified from accumulated other comprehensive income			(865)
Other comprehensive (loss) income			(136)
Balance at June 30, 2014	1,102		1,102
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			2,612
Amounts reclassified from accumulated other comprehensive income			(2,948)
Other comprehensive (loss) income			(336)
Balance at June 30, 2014	2,516		2,516
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			0
Amounts reclassified from accumulated other comprehensive income			0
Other comprehensive (loss) income			0
Balance at June 30, 2014	$ (4,597)		$ (4,597)