Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (50,058)	$ (41,450)	$ (13,543)
Other comprehensive income (loss) before reclassifications	22,907	(5,624)	(32,515)
Amounts reclassified from accumulated other comprehensive loss (income)	(7,915)	(2,984)	4,608
Net current-period other comprehensive income (loss)	14,992	(8,608)	(27,907)
Ending balance	(35,066)	(50,058)	(41,450)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(57,326)	(43,599)	(5,862)
Other comprehensive income (loss) before reclassifications	21,775	(13,727)	(37,737)
Net current-period other comprehensive income (loss)	21,775	(13,727)	(37,737)
Ending balance	(35,551)	(57,326)	(43,599)
Derivative adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	6,587	2,074	(7,771)
Other comprehensive income (loss) before reclassifications	(69)	7,497	5,237
Amounts reclassified from accumulated other comprehensive loss (income)	(6,033)	(2,984)	4,608
Net current-period other comprehensive income (loss)	(6,102)	4,513	9,845
Ending balance	485	6,587	2,074
Unrealized gain on investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	681	75	90
Other comprehensive income (loss) before reclassifications	1,201	606	(15)
Amounts reclassified from accumulated other comprehensive loss (income)	(1,882)
Net current-period other comprehensive income (loss)	(681)	606	(15)
Ending balance		$ 681	$ 75

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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