Income Taxes - Additional Information (Detail)	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2016 USD ($) tax_audit	Dec. 31, 2015 USD ($)
Income Tax Disclosure [Line Items]
Effective income tax rates	34.20%	34.60%	34.00%	34.40%
Unrecognized income tax benefit	$ 1,000,000			$ 1,000,000	$ 700,000
Interest and penalties accrued for income tax	0			0	$ 0
Minimum [Member]
Income Tax Disclosure [Line Items]
Change in uncertain tax positions	0			0
Maximum [Member]
Income Tax Disclosure [Line Items]
Change in uncertain tax positions	$ 1,000,000.0			$ 1,000,000.0
Federal [Member]
Income Tax Disclosure [Line Items]
Statute of limitations				3 years
State [Member]
Income Tax Disclosure [Line Items]
Number of State audits completed during period | tax_audit				3
Number of income tax audits in process | tax_audit				0
State [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Statute of limitations				3 years
State [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Statute of limitations				4 years
Foreign [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Statute of limitations				1 year
Foreign [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Statute of limitations				7 years