Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended			12 Months Ended
	Feb. 01, 2017	Dec. 31, 2016	Sep. 30, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2007
Income Taxes [Line Items]
Exemption from corporate income taxes						10 years
Corporate income taxes, years						15 years
Benefit of tax holiday under Indian Income Tax						$ 38,970	$ 45,600	$ 43,100
Income tax expense repatriation of foreign earnings			$ 270,600			$ 16,750
Dividends per share			$ 15.00			$ 15.00	$ 0.00	$ 0.00
Dividend distribution related taxes			$ 210,000
Repatriation of foreign earning			$ 1,030,000
Accrued taxes, likely amount		$ 24,200				$ 24,200
Deferred tax liability of unrecognized tax benefits related to repatriation		1,730				$ 1,730
Reversed provision for tax				$ 3,080				$ 860
Effective income tax rate						121.00%	22.80%	21.70%
Favorable adjustment upon review of tax liabilities								$ 1,200
Valuation allowance		9,167				$ 9,167	$ 5,454
Effective tax rate reconciliation resulting from certain adjustments							23.30%	21.10%
Tax charges related to deferred tax assets on investment								$ 1,630
Statutory provision						35.00%	35.00%	35.00%
Income taxes paid against liabilities for unrecognized tax benefits		41,410				$ 41,410	$ 42,180
Unrecognized tax benefits		68,510				68,510	50,240	$ 40,470
Expense recognized for accrued interest and penalties						150	70
Accrued interest and penalties related to unrecognized tax benefits		1,450				1,450	1,330
Unrecognized tax benefits, tax disputes						$ 1,540
Branch Profit Tax (BPT)						15.00%
Accumulated deferred tax liability on BPT									$ 1,730
Additional branch profit taxes if profits were not permanently invested		8,050				$ 8,050
Received service tax refund		3,240
Local tax liability gross		400				400	1,100
Local tax liability net		300				300	700
Valuation allowance, net tax charge		31,999				31,999	37,786
Minimum Alternate Tax (MAT)
Income Taxes [Line Items]
Valuation allowance		5,190				$ 5,190
Tax charges related to deferred tax minimum alternative tax								$ 880
Minimum alternate tax credit expiration period						10 years
Valuation allowance, net tax charge		30,780				$ 30,780
Minimum Alternate Tax (MAT) | Subsequent Event
Income Taxes [Line Items]
Potential income tax benefit if proposal is enacted	$ 2,700
Minimum Alternate Tax (MAT)
Income Taxes [Line Items]
Valuation allowance							840
India Tax Authority
Income Taxes [Line Items]
Favorable adjustment upon review of tax liabilities							1,100
Local Jurisdiction
Income Taxes [Line Items]
Favorable adjustment upon review of tax liabilities							$ 1,200
Effective Tax Rate Without One-Time Repatriation
Income Taxes [Line Items]
Effective income tax rate						23.00%
Tax Year 1996-97
Income Taxes [Line Items]
Unrecognized tax benefits		51,500				$ 51,500
Income tax liability recognized		$ 13,700				$ 13,700
Certain Units In SEZ | First Five Years
Income Taxes [Line Items]
Corporate income taxes, exemption percentage						100.00%
Certain Units In SEZ | Additional Two Years
Income Taxes [Line Items]
Corporate income taxes, exemption percentage						50.00%
Certain Units In SEZ | Additional Three Years
Income Taxes [Line Items]
Corporate income taxes, exemption percentage						50.00%
New Units In SEZ | First Five Years
Income Taxes [Line Items]
Corporate income taxes, exemption percentage						100.00%
New Units In SEZ | Next Five Years
Income Taxes [Line Items]
Corporate income taxes, exemption percentage						50.00%
New Units In SEZ | Another Five Years
Income Taxes [Line Items]
Corporate income taxes, exemption percentage						50.00%
Unit in Chennai | First Five Years | Mumbai | KPO SEZs
Income Taxes [Line Items]
Corporate income taxes, exemption percentage				100.00%	100.00%