Income Taxes - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) examination
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax examinations in process | examination	2
Unrecognized tax benefits	$ 700
Accrued unrecognized tax benefits interest and penalties	200
Tax reserves	200
Release of tax reserves	100
Adjustment to retained earnings	2,278
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income tax asset	2,300
Retained Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to retained earnings	2,278
Retained Deficit | New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to retained earnings	$ 2,300