Income Taxes (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	36.50%	31.90%	35.70%	32.90%
U.S. federal statutory income tax rate			35.00%	35.00%
Unrecognized tax benefits	$ 0		$ 0
Accrued interest and penalties on tax	$ 0		$ 0