Basis of Presentation - Summary of Accumulated Other Income (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Foreign currency translation adjustments, Before Tax Amount	$ (583)	$ 4,067
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	1,939	(363)
Foreign currency translation adjustments, Net of Tax	1,356	3,704
Unrealized holding gain arising during period, Before-Tax Amount	(251)	526
Unrealized holding gain arising during period, Tax (Expense) or Benefit	87	(154)
Unrealized holding gain arising during period, Net-of-tax Amount	(164)	372
Less: Reclassification adjustments for (gain) loss included in net income, Before-Tax Amount	237	(919)
Less: Reclassification adjustments for (gain) loss included in net income, Tax (Expense) or Benefit	(83)	322
Less: Reclassification adjustments for (gain) loss included in net income, Net-of-Tax Amount	154	(597)
Net unrealized gain (loss), Net-of-tax Amount	1,295	2,986
Net unrealized gain (loss) on cash flow hedging instruments, Before-Tax Amount	(79)	(745)
Net unrealized gain (loss) on cash flow hedging instruments, Tax (Expense) or Benefit	28	252
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(51)	(493)
Other Comprehensive Income (Loss), before Tax	(676)	2,929
Other comprehensive income (loss), Tax (Expense) or Benefit	1,971	57
Other comprehensive income (loss), Net-of-tax Amount	$ 1,295	$ 2,986