Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 4,661	$ 4,987	$ 5,081
Charged (Credited) to Costs and Expenses	278	(181)	483
Additions (Deductions)	(1,365)	(145)	(577)
Balance at End of Period	3,574	4,661	4,987
Valuation Allowance for Net Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	34,146	42,664	43,298
Charged (Credited) to Costs and Expenses	(4,081)	(8,518)	(634)
Balance at End of Period	30,065	34,146	42,664
Reserves for Value Added Tax Receivables [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	275	2,530	3,076
Charged (Credited) to Costs and Expenses		(638)	143
Additions (Deductions)	8	(1,617)	(689)
Balance at End of Period	$ 283	$ 275	$ 2,530