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, 2016	Jun. 30, 2015	Jun. 30, 2016
Other Intangible Assets, Gross Amount [Roll Forward]
Other intangible assets, beginning of period			$ 138,831
Intangible assets acquired during the period			14,000
Foreign currency translation effect on balances			715
Other intangible assets, end of period	$ 153,546		153,546
Other Intangible Assets, Accumulated Amortization [Roll Forward]
Other intangible assets, beginning of period			(33,728)
Amortization expense	(3,774)	$ (2,913)	(7,181)
Foreign currency translation effect on balances			(174)
Other intangible assets, end of period	$ (41,083)		$ (41,083)