Loans - Schedule of Portfolio of Loans (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate		$ 833,793	$ 856,026
Total consumer		189,231	184,409
Total commercial		26,141	40,013
Ending balance	1,080,448	1,049,165	1,080,448
Allowance for loan losses	20,554	21,116	20,554
Deferred loan costs, net		(1,143)	(1,007)
Total		19,973	19,547
Loans, net	1,060,901	1,029,192	1,060,901
One-to Four-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate		585,025	610,879
Multi-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate		54,485	54,233
Nonresidential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate		131,251	125,796
Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate		9,683	9,829
One-to Four-Family Residential and Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate		53,349	55,082
Multi-Family and Nonresidential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total real estate			207
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer		159,795	156,478
Auto [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer		5,669	5,219
Marine [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer		4,308	4,217
Recreational Vehicles [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer		17,347	16,523
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total consumer		2,112	1,972
Secured [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial		25,714	39,883
Unsecured [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total commercial		$ 427	$ 130