Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Taxes [Line Items]
Unrecognized tax benefits, interest expense	$ 0.1	$ 0.0	$ 0.2	$ 0.0
Effective income tax rate	31.10%	37.80%	31.30%	30.60%
ASU 2015-17
Income Taxes [Line Items]
Reclassification of net current deferred tax assets to net non-current deferred tax liability			$ 2.4		$ 2.4