Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	May 25, 2012
Summary Of Significant Accounting Policies [Line Items]
Shareholders require to qualify REIT	100
Percentage of preferred stock issued by each REIT	20.00%
Common stock dividend rate, percentage				5.00%
Cash reserve or deposits	$ 58,200,000	$ 39,300,000
OREO and repossessed assets total	38,300,000	32,300,000
Foreclosed assets acquired in FDIC-assisted transactions	12,300,000	8,900,000
First tranche reimbursement percentage from bank to FDIC	80.00%
Second tranche reimbursement percentage from bank to FDIC	95.00%
Anti-dilutive common stock options and warrants	6.7	7.2	6.8
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Premises and equipment, useful life	40 years
LibertyPointe Bank Acquisition [Member]
Summary Of Significant Accounting Policies [Line Items]
FDIC loss share coverage percentage up to first tranche	80.00%
FDIC loss share recovery limit first tranche	55,000,000
Portion of first loss tranche ineligible for FDIC reimbursement	11,700,000
FDIC loss share coverage percentage up to first tranche	95.00%
Park Avenue Bank Acquisition [Member]
Summary Of Significant Accounting Policies [Line Items]
FDIC loss share coverage percentage up to first tranche	80.00%
FDIC loss share recovery limit first tranche	66,000,000
FDIC loss share coverage percentage up to first tranche	95.00%
Commercial loans [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be full or partial charged-off	90 days
Commercial loans [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be full or partial charged-off	120 days
Residential loans and home equity loans [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be full or partial charged-off	120 days
Automobile loans [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be fully charged-off	120 days
Unsecured consumer loans [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of days past due of loans to be fully charged-off	150 days
Commercial and Industrial Loans [Member]
Summary Of Significant Accounting Policies [Line Items]
Loans evaluated for impairment	$ 250,000