Income Taxes - Summary of Provisions for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Current:
Federal	$ 1,754	$ 12,051	$ 784	$ 17,441
State	412	2,198	297	3,273
Total Current	2,166	14,249	1,081	20,714
Deferred:
Federal	1,971	1,049	2,280	2,220
State	230	153	261	319
Total Deferred	2,201	1,202	2,541	2,539
Provisions for income taxes	$ 4,367	$ 15,451	$ 3,622	$ 23,253

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.

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

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