Loans Receivable and Allowance for Loan Losses - Schedule of Troubled Debt Restructurings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 SecurityLoan	Jun. 30, 2013 SecurityLoan	Jun. 30, 2014 SecurityLoan	Jun. 30, 2013 SecurityLoan
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	4	18	8	33
Pre-Modification Outstanding Recorded Investment	$ 1,088	$ 4,227	$ 1,963	$ 7,029
Post-Modification Outstanding Recorded Investment	847	4,339	1,677	7,203
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	1	0	1	1
Pre-Modification Outstanding Recorded Investment	865	0	865	329
Post-Modification Outstanding Recorded Investment	870	0	870	307
Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	5	18	9	34
Pre-Modification Outstanding Recorded Investment	1,953	4,227	2,828	7,358
Post-Modification Outstanding Recorded Investment	1,717	4,339	2,547	7,510
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	1	0	1	0
Pre-Modification Outstanding Recorded Investment	300	0	300	0
Post-Modification Outstanding Recorded Investment	300	0	300	0
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	0	2	0	5
Pre-Modification Outstanding Recorded Investment	0	228	0	468
Post-Modification Outstanding Recorded Investment	0	222	0	461
Total Restructured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Number of Loans	6	20	10	39
Pre-Modification Outstanding Recorded Investment	2,253	4,455	3,128	7,826
Post-Modification Outstanding Recorded Investment	$ 2,017	$ 4,561	$ 2,847	$ 7,971