Deferred Charges and Other Assets - Components of Deferred Charges and Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Non-current mandatory tax security deposits (Note 20)	$ 13,418	$ 15,906
Rent and other deposits	3,803	3,215
Non-current deferred tax assets (Note 20)	1,899	1,681
Non-current value added tax receivables	673	856
Foreign currency forward contracts (Note 10)		4,060
Other	6,351	4,365
Deferred charges and other assets, total	$ 26,144	$ 30,083