Activity in Allowance for Doubtful Accounts Receivable (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]
Balance, beginning of period	$ (4,806)	$ (4,459)	$ (8,117)
Provision (increase) decrease	(2,425)	(1,049)	1,161
Amounts written off, net of recoveries	2,088	1,053	2,296
Foreign currency translation adjustments and other	98	(351)	201
Balance, end of period	$ (5,045)	$ (4,806)	$ (4,459)