Comprehensive Income (Changes in Accumulated Other Comprehensive Loss by Component) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013	$ 4,951
Other comprehensive income before reclassifications	759
Amounts reclassified from accumulated other comprehensive income	(1,460)
Other comprehensive loss	(701)	(10,535)
Balance at March 31, 2014	4,250
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013	5,458
Other comprehensive income before reclassifications	(721)
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive loss	(721)
Balance at March 31, 2014	4,737
Unrealized Gain on Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013	1,238
Other comprehensive income before reclassifications	160
Amounts reclassified from accumulated other comprehensive income	(163)
Other comprehensive loss	(3)
Balance at March 31, 2014	1,235
Unrealized Gain on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013	2,852
Other comprehensive income before reclassifications	1,320
Amounts reclassified from accumulated other comprehensive income	(1,297)
Other comprehensive loss	23
Balance at March 31, 2014	2,875
Other Comprehensive Loss on Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2013	(4,597)
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	0
Other comprehensive loss	0
Balance at March 31, 2014	$ (4,597)