Accumulated Other Comprehensive Income (Loss) (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (136,057)	$ (79,248)
Foreign currency translation adjustment	15,385	(60,825)
Other comprehensive income (loss) before reclassifications	13,644	(61,097)
Amounts reclassified from accumulated other comprehensive loss	163	968
Net current-period other comprehensive income (loss), before income taxes	13,807	(60,129)
Income tax expense	(1,899)	(2,279)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	11,908	(62,408)
Ending balance	(124,149)	(141,656)
Cash Flow Hedging [Member] | Interest Expense [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	163	968
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	(1,741)	(272)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(136,434)	(77,492)
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive income (loss), before income taxes	15,385	(60,825)
Income tax expense	(2,477)	(2,024)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	12,908	(62,849)
Ending balance	(123,526)	(140,341)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	377	(1,756)
Net current-period other comprehensive income (loss), before income taxes	(1,578)	696
Income tax expense	578	(255)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1,000)	441
Ending balance	$ (623)	$ (1,315)