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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2015
Income Tax Reconciliation [Line Items]
Effective income tax rate	(334.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations	34.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
U.S.federal statutory tax rate		35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Unrecognized tax benefits that would impact effective tax rate	$ 900,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Net change in valuation allowance from prior year	0us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Unrecognized tax benefits	800,000us-gaap_UnrecognizedTaxBenefits
Scenario, Forecast [Member]
Income Tax Reconciliation [Line Items]
Effective income tax rate			31.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember
Decrease in unrecognized tax benefits within next fiscal year due to effective settlement			$ 600,000us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319



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-Topic 235

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

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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