Income Taxes - Schedule of Reconciliation between Provision (Benefit) for Income Taxes and Amount Computed Using Federal Statutory Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income tax at statutory rate	$ (1,223)	$ 16,144	$ (2,643)
State and local income tax, net of Federal benefit	(807)	2,446	(3)
Tax-exempt interest income	(1,585)	(1,712)	(1,873)
Non-deductible expenses and other	(1,011)	67	(894)
Provision (benefit) for income taxes	$ (4,626)	$ 16,945	$ (5,413)
Income tax at statutory rate	35.00%	35.00%	35.00%
State and local income tax, net of Federal benefit	23.10%	5.30%	0.10%
Tax-exempt interest income	45.30%	(3.70%)	24.80%
Non-deductible expenses and other	28.90%	0.10%	11.80%
Provision (benefit) for income taxes	132.30%	36.70%	71.70%