Goodwill and Other Intangible Assets Other Intangible Assets, Changes in Net Carrying Amount (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other Intangible Assets, Gross Amount [Roll Forward]
Other intangible assets, beginning of period	$ 124,093
Intangible assets acquired during the period	2,864
Foreign currency translation effect on balances	(6,363)
Other intangible assets, end of period	120,594
Other Intangible Assets, Accumulated Amortization [Roll Forward]
Other intangible assets, beginning of period	(23,158)
Amortization expense	(2,752)	(2,745)
Foreign currency translation effect on balances	1,474
Other intangible assets, end of period	$ (24,436)