Schedule of Components of Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Deferred Tax Assets and Liabilities [Line Items]
Carry-forward losses of subsidiaries	$ 7	$ 53
Minimum alternate tax credit of subsidiaries	35,979	30,752
Property, plant and equipment	198	394
Accrued expenses and allowances	15,055	13,820
Valuation allowance	(9,167)	(5,454)
Total deferred tax assets	42,072	39,565
Provision for branch tax on dividend equivalent in India	(9,782)	(1,726)
Provision for tax on unrealized gains in India	(33)	(53)
Others	(258)
Total deferred tax liabilities	(10,073)	(1,779)
Net deferred tax assets	$ 31,999	$ 37,786