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Income Taxes - Components of Consolidated Income Tax Expense (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ 15,270	$ 7,372
State	504	302
Total Current	15,774	7,674
Deferred:
Federal	(207)	116
Income tax expense, Total	15,567	7,790	3,176
As Adjusted [Member]
Current:
Federal			4,529
State			172
Total Current			4,701
Deferred:
Federal			(1,525)
Income tax expense, Total			$ 3,176

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.