Goodwill and Other Intangible Assets Other Intangible Assets, Changes in Net Carrying Amount (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015
Other Intangible Assets, Gross Amount [Roll Forward]
Other intangible assets, beginning of period			$ 124,093
Intangible assets acquired during the period			13,695
Foreign currency translation effect on balances			(4,667)
Other intangible assets, end of period	$ 133,121		133,121
Other Intangible Assets, Accumulated Amortization [Roll Forward]
Other intangible assets, beginning of period			(23,158)
Amortization expense	(2,913)	$ (2,963)	(5,667)
Foreign currency translation effect on balances			1,154
Other intangible assets, end of period	$ (27,671)		$ (27,671)