Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Percent	24.14%	26.06%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 700,000		$ 700,000
Decreased deferred tax assets net	(12,400,000)
Recognized net deferred tax asset	73,979,000		86,352,000
Operating Loss Carryforwards, Valuation Allowance	0		0
Unrecognized Tax Benefits, Income Tax Penalties Expense	0	$ 0
IRC Section 382 Limitation, Valuation Allowance	9,200,000		9,300,000
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards	$ 9,200,000		$ 9,300,000