Goodwill and Other Intangible Assets Other Intangible Assets, Changes in Net Carrying Amount (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Intangible Assets, Gross Amount [Roll Forward]
Other intangible assets, beginning of period	$ 138,831
Intangible assets acquired during the period	13,600
Foreign currency translation effect on balances	1,958
Other intangible assets, end of period	154,389
Other Intangible Assets, Accumulated Amortization [Roll Forward]
Other intangible assets, beginning of period	(33,728)
Amortization expense	(3,407)	$ (2,752)
Foreign currency translation effect on balances	(682)
Other intangible assets, end of period	$ (37,817)