Summary Of Significant Accounting Policies - Summary of Accumulated Other Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Foreign currency translation adjustments, Before Tax Amount	$ 2,560	$ (949)	$ 2,347
Foreign currency translation adjustments, Tax (Expense) or Benefit	(7,358)	2,863	1,104
Foreign currency translation adjustments, Net of Tax	(4,798)	1,914	3,451
Unrealized holding gain arising during period, Before-Tax Amount	(168)	(260)	264
Unrealized holding gain arising during period, Tax (Expense) or Benefit	59	91	(62)
Unrealized holding gain arising during period, Net-of-tax Amount	(109)	(169)	202
Net unrealized gain (loss) on cash flow hedging instruments, Before-Tax Amount	675	(237)	(741)
Net unrealized gain (loss) on cash flow hedging instruments, Tax (Expense) or Benefit	(236)	83	251
Net unrealized gain (loss) on cash flow hedging instruments, Net-of-tax Amount	439	(154)	(490)
Less: Reclassification adjustments for (gain) loss included in net income, Before-Tax Amount	(69)	569	(960)
Less: Reclassification adjustments for (gain) loss included in net income, Tax (Expense) or Benefit	24	(199)	336
Less: Reclassification adjustments for (gain) loss included in net income, Net-of-Tax Amount	(45)	370	(624)
Other Comprehensive Income (Loss), before Tax	2,998	(877)	910
Other comprehensive income (loss), Tax (Expense) or Benefit	(7,511)	2,838	1,629
Other comprehensive income (loss), Net-of-tax Amount	$ (4,513)	$ 1,961	$ 2,539