Loans - Presentation of Loans Individually Evaluated for Impairment by Class (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	$ 27,369	$ 58,701	$ 41,393
With no specific allowance recorded, Recorded Investment	15,306	40,977	28,965
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	29,945	52,464
With no specific allowance recorded, Interest Income Recognized	28	292
With no specific allowance recorded, Cash Basis Income Recognized	149	357
With a specific allowance recorded, Unpaid Principal Balance	35,272	24,255	21,284
With a specific allowance recorded, Recorded Investment	32,778	19,636	19,216
With a specific allowance recorded, Allowance for Loan Losses Allocated	4,340	3,436	3,325
With a specific allowance recorded, Average Recorded Investment	17,434	24,933
With a specific allowance recorded, Interest Income Recognized	341	7
With a specific allowance recorded, Cash Basis Income Recognized	362	20
Total Unpaid Principal Balance	62,641	82,956	62,677
Total Recorded Investment	48,084	60,613	48,181
Total Allowance for Loan Losses Allocated	4,340	3,436	3,325
Total Average Recorded Investment	47,379	77,397
Total Interest Income, Accrual Method	369	299
Total Cash Basis Income Recognized	511	377
Permanent Real Estate Loans [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	15,324	30,024	24,347
With no specific allowance recorded, Recorded Investment	8,928	27,492	17,674
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	17,344	39,366
With no specific allowance recorded, Interest Income Recognized	2	164
With no specific allowance recorded, Cash Basis Income Recognized	50	200
With a specific allowance recorded, Unpaid Principal Balance	19,586	18,378	9,990
With a specific allowance recorded, Recorded Investment	18,739	16,021	9,550
With a specific allowance recorded, Allowance for Loan Losses Allocated	2,520	3,108	1,786
With a specific allowance recorded, Average Recorded Investment	9,453	17,705
With a specific allowance recorded, Interest Income Recognized	183	7
With a specific allowance recorded, Cash Basis Income Recognized	197	17
Total Recorded Investment	27,667		27,224
Permanent Real Estate Loans [Member] | One-to Four-Family Residential [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	5,807	19,294	13,321
With no specific allowance recorded, Recorded Investment	4,431	17,454	11,309
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	11,424	19,759
With no specific allowance recorded, Interest Income Recognized		155
With no specific allowance recorded, Cash Basis Income Recognized	39	164
With a specific allowance recorded, Unpaid Principal Balance	16,487	735	8,897
With a specific allowance recorded, Recorded Investment	16,231	735	8,897
With a specific allowance recorded, Allowance for Loan Losses Allocated	2,224	260	1,675
With a specific allowance recorded, Average Recorded Investment	7,951	1,269
With a specific allowance recorded, Interest Income Recognized	171
With a specific allowance recorded, Cash Basis Income Recognized	177
Permanent Real Estate Loans [Member] | Multi-Family Residential [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	90	775	662
With no specific allowance recorded, Recorded Investment	90	681	567
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	490	1,784
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized		1
With a specific allowance recorded, Unpaid Principal Balance	1,185	1,120	185
With a specific allowance recorded, Recorded Investment	1,085	1,064	85
With a specific allowance recorded, Allowance for Loan Losses Allocated	206	281	25
With a specific allowance recorded, Average Recorded Investment	335	2,062
With a specific allowance recorded, Interest Income Recognized	11	2
With a specific allowance recorded, Cash Basis Income Recognized	16	2
Permanent Real Estate Loans [Member] | Nonresidential [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	5,514	6,255	6,451
With no specific allowance recorded, Recorded Investment	3,920	5,657	5,311
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	4,943	13,545
With no specific allowance recorded, Interest Income Recognized	2	9
With no specific allowance recorded, Cash Basis Income Recognized	11	35
With a specific allowance recorded, Unpaid Principal Balance	1,914	12,610	908
With a specific allowance recorded, Recorded Investment	1,423	12,095	568
With a specific allowance recorded, Allowance for Loan Losses Allocated	90	1,840	86
With a specific allowance recorded, Average Recorded Investment	1,167	11,933
With a specific allowance recorded, Interest Income Recognized	1	5
With a specific allowance recorded, Cash Basis Income Recognized	4	15
Permanent Real Estate Loans [Member] | Land [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	3,913	3,700	3,913
With no specific allowance recorded, Recorded Investment	487	3,700	487
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	487	4,278
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized
With a specific allowance recorded, Unpaid Principal Balance		3,913
With a specific allowance recorded, Recorded Investment		2,127
With a specific allowance recorded, Allowance for Loan Losses Allocated		727
With a specific allowance recorded, Average Recorded Investment		2,441
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized
Construction Loans [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	1,350	12,493	1,433
With no specific allowance recorded, Recorded Investment	641	1,526	825
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	1,160	3,855
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized		3
With a specific allowance recorded, Unpaid Principal Balance	3,829	5,306	3,895
With a specific allowance recorded, Recorded Investment	2,241	3,411	2,267
With a specific allowance recorded, Allowance for Loan Losses Allocated	677	318	680
With a specific allowance recorded, Average Recorded Investment	2,266	6,801
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized
Total Recorded Investment	2,882		3,092
Construction Loans [Member] | One-to Four-Family Residential [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	1,350	12,493	1,433
With no specific allowance recorded, Recorded Investment	641	1,526	825
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	1,160	3,855
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized		3
With a specific allowance recorded, Unpaid Principal Balance	3,829	5,306	3,895
With a specific allowance recorded, Recorded Investment	2,241	3,411	2,267
With a specific allowance recorded, Allowance for Loan Losses Allocated	677	318	680
With a specific allowance recorded, Average Recorded Investment	2,266	6,801
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized
Construction Loans [Member] | Multi-Family and Nonresidential [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance
With no specific allowance recorded, Recorded Investment
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized
With a specific allowance recorded, Unpaid Principal Balance
With a specific allowance recorded, Recorded Investment
With a specific allowance recorded, Allowance for Loan Losses Allocated
With a specific allowance recorded, Average Recorded Investment
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized
Consumer Loans [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	2,677	10,847	7,132
With no specific allowance recorded, Recorded Investment	2,026	10,106	6,422
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	7,291	7,686
With no specific allowance recorded, Interest Income Recognized	26	113
With no specific allowance recorded, Cash Basis Income Recognized	55	125
With a specific allowance recorded, Unpaid Principal Balance	11,533		7,399
With a specific allowance recorded, Recorded Investment	11,474		7,399
With a specific allowance recorded, Allowance for Loan Losses Allocated	1,140		859
With a specific allowance recorded, Average Recorded Investment	5,583	18
With a specific allowance recorded, Interest Income Recognized	158
With a specific allowance recorded, Cash Basis Income Recognized	165
Total Recorded Investment	13,500		13,821
Consumer Loans [Member] | Home Equity [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	2,259	9,463	6,458
With no specific allowance recorded, Recorded Investment	1,751	8,874	5,808
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	6,623	6,685
With no specific allowance recorded, Interest Income Recognized	26	108
With no specific allowance recorded, Cash Basis Income Recognized	45	116
With a specific allowance recorded, Unpaid Principal Balance	10,668		6,743
With a specific allowance recorded, Recorded Investment	10,638		6,743
With a specific allowance recorded, Allowance for Loan Losses Allocated	999		719
With a specific allowance recorded, Average Recorded Investment	5,028
With a specific allowance recorded, Interest Income Recognized	153
With a specific allowance recorded, Cash Basis Income Recognized	160
Consumer Loans [Member] | Auto [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	72	58	83
With no specific allowance recorded, Recorded Investment	51	37	66
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	49	48
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized	3	1
With a specific allowance recorded, Unpaid Principal Balance	9
With a specific allowance recorded, Recorded Investment	9
With a specific allowance recorded, Allowance for Loan Losses Allocated
With a specific allowance recorded, Average Recorded Investment	2
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized
Consumer Loans [Member] | Marine [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	157	188	160
With no specific allowance recorded, Recorded Investment	157	188	160
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	166	226
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized	3	2
With a specific allowance recorded, Unpaid Principal Balance
With a specific allowance recorded, Recorded Investment
With a specific allowance recorded, Allowance for Loan Losses Allocated
With a specific allowance recorded, Average Recorded Investment
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized
Consumer Loans [Member] | Recreational Vehicles [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	188	1,131	429
With no specific allowance recorded, Recorded Investment	66	1,000	386
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	452	722
With no specific allowance recorded, Interest Income Recognized		5
With no specific allowance recorded, Cash Basis Income Recognized	4	6
With a specific allowance recorded, Unpaid Principal Balance	856		656
With a specific allowance recorded, Recorded Investment	827		656
With a specific allowance recorded, Allowance for Loan Losses Allocated	141		140
With a specific allowance recorded, Average Recorded Investment	553	18
With a specific allowance recorded, Interest Income Recognized	5
With a specific allowance recorded, Cash Basis Income Recognized	5
Consumer Loans [Member] | Other [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	1	7	2
With no specific allowance recorded, Recorded Investment	1	7	2
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	1	5
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized
With a specific allowance recorded, Unpaid Principal Balance
With a specific allowance recorded, Recorded Investment
With a specific allowance recorded, Allowance for Loan Losses Allocated
With a specific allowance recorded, Average Recorded Investment
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized
Commercial Loans [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	8,018	5,337	8,481
With no specific allowance recorded, Recorded Investment	3,711	1,853	4,044
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	4,150	1,557
With no specific allowance recorded, Interest Income Recognized		15
With no specific allowance recorded, Cash Basis Income Recognized	44	29
With a specific allowance recorded, Unpaid Principal Balance	324	571
With a specific allowance recorded, Recorded Investment	324	204
With a specific allowance recorded, Allowance for Loan Losses Allocated	3	10
With a specific allowance recorded, Average Recorded Investment	132	409
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized		3
Commercial Loans [Member] | Secured [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	4,073	2,046	4,414
With no specific allowance recorded, Recorded Investment	3,711	1,141	4,044
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	4,149	1,307
With no specific allowance recorded, Interest Income Recognized
With no specific allowance recorded, Cash Basis Income Recognized	1	18
With a specific allowance recorded, Unpaid Principal Balance	324	571
With a specific allowance recorded, Recorded Investment	324	204
With a specific allowance recorded, Allowance for Loan Losses Allocated	3	10
With a specific allowance recorded, Average Recorded Investment	132	409
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized		3
Commercial Loans [Member] | Unsecured [Member]
Schedule Of Financial Receivables [Line Items]
With no specific allowance recorded, Unpaid Principal Balance	3,945	3,291	4,067
With no specific allowance recorded, Recorded Investment		712
With no specific allowance recorded, Allowance for Loan Losses Allocated
With no specific allowance recorded, Average Recorded Investment	1	250
With no specific allowance recorded, Interest Income Recognized		15
With no specific allowance recorded, Cash Basis Income Recognized	43	11
With a specific allowance recorded, Unpaid Principal Balance
With a specific allowance recorded, Recorded Investment
With a specific allowance recorded, Allowance for Loan Losses Allocated
With a specific allowance recorded, Average Recorded Investment
With a specific allowance recorded, Interest Income Recognized
With a specific allowance recorded, Cash Basis Income Recognized