Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Effective tax rates (as a percent)	32.00%	13.80%
Reversal of unrecognized tax benefit	$ 1,818	$ 2,173
Prior year tax expense/(benefit)	2,450	$ 0	$ (875)
Income tax rate reconciliation tax holiday change in amount	$ (217)
Effective tax rate in Philippines post tax exemption (as a percent)	5.00%
Effect of diluted earnings per share, tax holiday (in dollars per share)	$ 0.09	$ 0.10	$ 0.16
Operating loss carryforward valuation allowance	$ 512	$ 665
Valuation allowance related to tax credit carry forward	83	64
Deferred income taxes provided for Company's share of undistributed net earnings of foreign operations	0	0
Undistributed net earnings of foreign operations	261,804	222,292
Unrecognized tax benefits	2,797	2,761
Recognized interest and penalties	205	276
Accrued interest on unrecognized tax benefits	$ 1,269	1,117
First Five Years
Income Taxes [Line Items]
Tax exemption on profit (as a percent)	100.00%
Five to Ten Years
Income Taxes [Line Items]
Tax exemption on profit (as a percent)	50.00%
Expiration 2032
Income Taxes [Line Items]
Operating loss carryforwards	$ 9,063	$ 25,300
Operating loss carry forwards expiration date (year)	2032