Shareholders' Equity Changes in Accumulated Other Comprehensive Income (Loss) Balances (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	$ (27,241)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	392
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(30,156)	1,307
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(28,976)
Balance as of March 31, 2015	(55,825)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	(25,789)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(30,156)
Balance as of March 31, 2015	(55,945)
Cash Flow Hedging | Foreign Exchange Contract
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2014	(1,452)
Reclassification to the income statement	392
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	1,180
Balance as of March 31, 2015	$ 120