Differentiation between Federal Statutory Tax Rate and Effective Tax Rate (Detail)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Rate Reconciliation [Line Items]
Statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	0.30%	0.20%	0.10%
Foreign effective tax rates different from U.S. Statutory Rate	(11.70%)	(12.40%)	(12.00%)
Tax reserves	0.00%	(0.10%)	(2.70%)
Prior Year state tax payment	0.20%	0.00%	0.00%
Valuation Allowance	(0.10%)	0.00%	0.00%
Tax on India Entity related cost	(0.60%)	0.00%	0.00%
Effective income tax rate	23.10%	22.70%	20.40%

Effective Income Tax Rate Reconciliation at Domestic Statutory Income Tax Rate

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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