Goodwill and Other Intangible Assets Other Intangible Assets, Changes in Net Carrying Amount (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Other Intangible Assets, Gross Amount [Roll Forward]
Other intangible assets, beginning	$ 116,279	$ 54,907
Intangible assets acquired during the period	16,050	57,388
Currency translation effect on foreign balances	(8,236)	3,984
Other intangible assets, ending	124,093	116,279
Other Intangible Assets, Accumulated Amortization [Roll Forward]
Other intangible assets, beginning	(13,268)	(4,015)
Amortization expense	(11,599)	(9,178)
Currency translation effect on foreign balances	1,709	(75)
Other intangible assets, ending	$ (23,158)	$ (13,268)