Summary of Significant Accounting Policies (Changes in Accumulated Other Comprehensive Loss by Component) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Other Comprehensive Income [Abstract]
Foreign currency translation, Beginning balance	$ (12,410)	$ (1,908)
Foreign currency translation, Other comprehensive loss before reclassifications	(17,925)	(10,502)
Other comprehensive income (loss), Foreign currency transaction and translation adjustment, net of tax	(17,925)	(10,502)	(5,971)
Foreign currency translation, Ending balance	(30,335)	(12,410)	(1,908)
Unrealized gain (loss) on derivatives, Beginning balance	2,140	(7,722)
Unrealized gain (loss) on derivatives, Net other comprehensive loss, net of tax	(325)	7,106
Unrealized gain (loss) on derivatives, Amounts reclassified from accumulated other comprehensive loss	(1,926)	2,756
Unrealized gain (loss) on derivatives, Net other comprehensive loss, net of tax	(2,251)	9,862	(7,722)
Unrealized gain (loss) on derivatives, Ending balance	(111)	2,140	(7,722)
Post employment benefit liability, Beginning balance	(12)	15
Post employment benefit liability, Amounts reclassified from accumulated other comprehensive loss		(27)
Post employment benefit liability ,Other comprehensive income (loss)		(27)
Post employment benefit liability, Ending balance	(12)	(12)	15
Total, Other comprehensive loss before reclassifications	(18,250)	(3,396)
Total, Amounts reclassified from accumulated other comprehensive loss	(1,926)	2,729
Other comprehensive income (loss), net of tax	(20,176)	(667)	(13,677)
Accumulated other comprehensive income (loss), net of tax, Total	$ (30,458)	$ (10,282)	$ (9,615)