Loan - Allowance for Loan Losses and Recorded Investment in Loans (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	$ 6,918,009	$ 5,319,235
Covered loans	21,673,808	45,764,397
Total loans, net of unearned income	707,456,117	673,128,334
One- to Four-Family First Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	179,506,000	177,816,000
Home Equity Loans and Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	40,561,000	40,425,000
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	269,849,000	252,805,000
Construction and Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	83,271,000	75,529,000
Multi-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	16,578,000	19,659,000
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	77,533,000	72,253,000
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	40,158,000	34,641,000
Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	707,456,000	673,128,000
Loans [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	592,676,000	498,998,000
Individually evaluated for impairment, loans	2,580,000	5,536,000
Loans [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	90,526,000	122,830,000
Covered loans	21,674,000	45,764,000
Loans [Member] \| One- to Four-Family First Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	179,506,000	177,816,000
Loans [Member] \| One- to Four-Family First Mortgage [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	137,685,000	115,278,000
Individually evaluated for impairment, loans	386,000	1,464,000
Loans [Member] \| One- to Four-Family First Mortgage [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	37,084,000	49,943,000
Covered loans	4,351,000	11,131,000
Loans [Member] \| Home Equity Loans and Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	40,561,000	40,426,000
Loans [Member] \| Home Equity Loans and Lines [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	30,422,000	26,937,000
Individually evaluated for impairment, loans	3,000	56,000
Loans [Member] \| Home Equity Loans and Lines [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	7,798,000	10,123,000
Covered loans	2,338,000	3,309,000
Loans [Member] \| Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	269,849,000	252,805,000
Loans [Member] \| Commercial Real Estate [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	225,356,000	182,376,000
Individually evaluated for impairment, loans	360,000	3,428,000
Loans [Member] \| Commercial Real Estate [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	32,945,000	44,132,000
Covered loans	11,188,000	22,869,000
Loans [Member] \| Construction and Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	83,271,000	75,529,000
Loans [Member] \| Construction and Land [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	79,771,000	66,815,000
Individually evaluated for impairment, loans		60,000
Loans [Member] \| Construction and Land [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	2,096,000	3,650,000
Covered loans	1,404,000	5,004,000
Loans [Member] \| Multi-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	16,578,000	19,658,000
Loans [Member] \| Multi-Family Residential [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	7,778,000	7,930,000
Individually evaluated for impairment, loans		528,000
Loans [Member] \| Multi-Family Residential [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	7,678,000	9,818,000
Covered loans	1,122,000	1,383,000
Loans [Member] \| Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	77,533,000	72,253,000
Loans [Member] \| Commercial and Industrial [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	72,003,000	66,321,000
Individually evaluated for impairment, loans	1,831,000
Loans [Member] \| Commercial and Industrial [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	2,428,000	4,469,000
Covered loans	1,271,000	1,463,000
Loans [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	40,158,000	34,641,000
Loans [Member] \| Consumer [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, loans	39,661,000	33,341,000
Individually evaluated for impairment, loans
Loans [Member] \| Consumer [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans	497,000	695,000
Covered loans		605,000
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	6,918,000	5,319,000
Allowance for Loan Losses [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	6,188,000	4,931,000
Individually evaluated for impairment, allowance for loan losses	482,000	183,000
Allowance for Loan Losses [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses	248,000	205,000
Covered loans, allowance for loan losses
Allowance for Loan Losses [Member] \| One- to Four-Family First Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	1,088,000	982,000
Allowance for Loan Losses [Member] \| One- to Four-Family First Mortgage [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	904,000	749,000
Individually evaluated for impairment, allowance for loan losses		49,000
Allowance for Loan Losses [Member] \| One- to Four-Family First Mortgage [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses	184,000	184,000
Covered loans, allowance for loan losses
Allowance for Loan Losses [Member] \| Home Equity Loans and Lines [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	424,000	343,000
Allowance for Loan Losses [Member] \| Home Equity Loans and Lines [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	366,000	322,000
Individually evaluated for impairment, allowance for loan losses
Allowance for Loan Losses [Member] \| Home Equity Loans and Lines [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses	58,000	21,000
Covered loans, allowance for loan losses
Allowance for Loan Losses [Member] \| Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	2,528,000	2,040,000
Allowance for Loan Losses [Member] \| Commercial Real Estate [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	2,528,000	1,906,000
Individually evaluated for impairment, allowance for loan losses		134,000
Allowance for Loan Losses [Member] \| Commercial Real Estate [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses
Covered loans, allowance for loan losses
Allowance for Loan Losses [Member] \| Construction and Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	977,000	785,000
Allowance for Loan Losses [Member] \| Construction and Land [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	977,000	785,000
Individually evaluated for impairment, allowance for loan losses
Allowance for Loan Losses [Member] \| Construction and Land [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses
Covered loans, allowance for loan losses
Allowance for Loan Losses [Member] \| Multi-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	90,000	86,000
Allowance for Loan Losses [Member] \| Multi-Family Residential [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	90,000	86,000
Individually evaluated for impairment, allowance for loan losses
Allowance for Loan Losses [Member] \| Multi-Family Residential [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses
Covered loans, allowance for loan losses
Allowance for Loan Losses [Member] \| Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	1,338,000	683,000
Allowance for Loan Losses [Member] \| Commercial and Industrial [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	850,000	683,000
Individually evaluated for impairment, allowance for loan losses	482,000
Allowance for Loan Losses [Member] \| Commercial and Industrial [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses	6,000
Covered loans, allowance for loan losses
Allowance for Loan Losses [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for loan losses	473,000	400,000
Allowance for Loan Losses [Member] \| Consumer [Member] \| Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment, allowance for loan losses	473,000	400,000
Individually evaluated for impairment, allowance for loan losses
Allowance for Loan Losses [Member] \| Consumer [Member] \| Acquired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Non-covered acquired loans, allowance for loan losses
Covered loans, allowance for loan losses