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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012			$ (7,705)
Other comprehensive loss before reclassifications			(11,551)
Amounts reclassified from accumulated other comprehensive loss			2,281
Other comprehensive income (loss)	1,266	(17,433)	(9,270)	(10,293)
Balance at June 30, 2013	(16,975)		(16,975)
Foreign currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012			(3,024)
Other comprehensive loss before reclassifications			(2,829)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive income (loss)			(2,829)
Balance at June 30, 2013	(5,853)		(5,853)
Unrealized gain (loss) on available-for-sale securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012			2,426
Other comprehensive loss before reclassifications			(3,093)
Amounts reclassified from accumulated other comprehensive loss			(31)
Other comprehensive income (loss)			(3,124)
Balance at June 30, 2013	(698)		(698)
Unrealized (loss) gain on derivative instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012			(10)
Other comprehensive loss before reclassifications			(5,295)
Amounts reclassified from accumulated other comprehensive loss			2,312
Other comprehensive income (loss)			(2,983)
Balance at June 30, 2013	(2,993)		(2,993)
Other comprehensive loss on pension liability [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2012			(7,097)
Other comprehensive loss before reclassifications			(334)
Amounts reclassified from accumulated other comprehensive loss			0
Other comprehensive income (loss)			(334)
Balance at June 30, 2013	$ (7,431)		$ (7,431)