Income Taxes - Summary of Net Deferred Tax Assets (Liabilities) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Allowance for loan losses	$ 8,139	$ 8,964
Other real estate owned	899	1,521
Capital losses	0	26
Accrued stock compensation	528	492
Federal tax loss carryforward	42,776	44,755
State tax loss carryforward	7,925	8,202
Alternative minimum tax carryforward	1,304	1,304
Net unrealized securities losses	6,503	0
Deferred compensation	1,169	1,162
Other	273	990
Gross deferred tax assets	69,516	67,416
Less: Valuation allowance	0	(44,821)
Deferred tax assets net of valuation allowance	69,516	22,595
Depreciation	(1,365)	(1,514)
Deposit base intangible	(233)	(538)
Net unrealized securities gains	0	(1,972)
Accrued interest and fee income	(1,060)	(620)
Gross deferred tax liabilities	(2,658)	(4,644)
Net deferred tax assets	$ 66,858	$ 17,951