Loans - Presentation of Loans Individually Evaluated for Impairment by Class (Detail) (USD $) | 12 Months Ended |
In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | $27,869 | $41,393 | |
With no specific allowance recorded, Recorded Investment | 16,138 | 28,965 | |
With no specific allowance recorded, Average Recorded Investment | 16,563 | 36,360 | 63,797 |
With no specific allowance recorded, Interest Income Recognized | 366 | 640 | 938 |
With no specific allowance recorded, Cash Basis Income Recognized | 720 | 944 | 1,375 |
With a specific allowance recorded, Unpaid Principal Balance | 32,120 | 21,284 | |
With a specific allowance recorded, Recorded Investment | 29,759 | 19,216 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 3,310 | 3,325 | |
With a specific allowance recorded, Average Recorded Investment | 30,526 | 14,150 | 33,680 |
With a specific allowance recorded, Interest Income Recognized | 1,054 | 661 | 19 |
With a specific allowance recorded, Cash Basis Income Recognized | 1,101 | 669 | 79 |
Total Unpaid Principal Balance | 59,989 | 62,677 | |
Total Recorded Investment | 45,897 | 48,181 | |
Total Allowance for Loan Losses Allocated | 3,310 | 3,325 | |
Total Average Recorded Investment | 47,089 | 50,510 | 97,477 |
Total Interest Income, Accrual Method | 1,420 | 1,301 | 957 |
Total Cash Basis Income Recognized | 1,821 | 1,613 | 1,454 |
Nonresidential [Member] | Secured [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With a specific allowance recorded, Unpaid Principal Balance | 7,000 | | |
Commercial Loans [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 19,631 | 20,940 | |
With no specific allowance recorded, Recorded Investment | 10,089 | 11,234 | |
With no specific allowance recorded, Average Recorded Investment | 9,114 | 12,371 | 34,716 |
With no specific allowance recorded, Interest Income Recognized | 256 | 22 | 59 |
With no specific allowance recorded, Cash Basis Income Recognized | 455 | 169 | 280 |
With a specific allowance recorded, Unpaid Principal Balance | 7,116 | 4,988 | |
With a specific allowance recorded, Recorded Investment | 4,756 | 2,920 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 717 | 791 | |
With a specific allowance recorded, Average Recorded Investment | 4,707 | 7,358 | 32,411 |
With a specific allowance recorded, Interest Income Recognized | | | 19 |
With a specific allowance recorded, Cash Basis Income Recognized | 10 | 8 | 79 |
Total Recorded Investment | 14,845 | 14,154 | |
Commercial Loans [Member] | Construction [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 1,126 | 1,433 | |
With no specific allowance recorded, Recorded Investment | 188 | 825 | |
With no specific allowance recorded, Average Recorded Investment | 552 | 1,381 | 6,051 |
With no specific allowance recorded, Cash Basis Income Recognized | | | 14 |
With a specific allowance recorded, Unpaid Principal Balance | 2,815 | 3,895 | |
With a specific allowance recorded, Recorded Investment | 863 | 2,267 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 93 | 680 | |
With a specific allowance recorded, Average Recorded Investment | 1,682 | 2,559 | 9,511 |
With a specific allowance recorded, Cash Basis Income Recognized | | 1 | 2 |
Commercial Loans [Member] | Land [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 3,958 | 3,913 | |
With no specific allowance recorded, Recorded Investment | 532 | 487 | |
With no specific allowance recorded, Average Recorded Investment | 521 | 1,290 | 4,918 |
With a specific allowance recorded, Average Recorded Investment | | 532 | 2,603 |
With a specific allowance recorded, Cash Basis Income Recognized | | | 57 |
Commercial Loans [Member] | Secured [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 3,903 | 4,414 | |
With no specific allowance recorded, Recorded Investment | 3,702 | 4,044 | |
With no specific allowance recorded, Average Recorded Investment | 3,706 | 3,506 | 1,480 |
With no specific allowance recorded, Cash Basis Income Recognized | 2 | 11 | 124 |
With a specific allowance recorded, Unpaid Principal Balance | 324 | | |
With a specific allowance recorded, Recorded Investment | 324 | | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 3 | | |
With a specific allowance recorded, Average Recorded Investment | 324 | 102 | 487 |
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 | 3,258 | 4,067 | |
With no specific allowance recorded, Average Recorded Investment | | 179 | 261 |
With no specific allowance recorded, Interest Income Recognized | | 1 | 2 |
With no specific allowance recorded, Cash Basis Income Recognized | 90 | 82 | 11 |
Commercial Loans [Member] | Multifamily [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 185 | 662 | |
With no specific allowance recorded, Recorded Investment | 85 | 567 | |
With no specific allowance recorded, Average Recorded Investment | 87 | 638 | 2,581 |
With no specific allowance recorded, Interest Income Recognized | | 2 | 36 |
With no specific allowance recorded, Cash Basis Income Recognized | | 13 | 63 |
With a specific allowance recorded, Unpaid Principal Balance | 33 | 185 | |
With a specific allowance recorded, Recorded Investment | 8 | 85 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 6 | 25 | |
With a specific allowance recorded, Average Recorded Investment | 293 | 330 | 2,390 |
Commercial Loans [Member] | Nonresidential [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 7,201 | 6,451 | |
With no specific allowance recorded, Recorded Investment | 5,582 | 5,311 | |
With no specific allowance recorded, Average Recorded Investment | 4,248 | 5,377 | 19,425 |
With no specific allowance recorded, Interest Income Recognized | 256 | 19 | 21 |
With no specific allowance recorded, Cash Basis Income Recognized | 363 | 63 | 68 |
With a specific allowance recorded, Unpaid Principal Balance | 3,944 | 908 | |
With a specific allowance recorded, Recorded Investment | 3,561 | 568 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 615 | 86 | |
With a specific allowance recorded, Average Recorded Investment | 2,408 | 3,835 | 17,420 |
With a specific allowance recorded, Interest Income Recognized | | | 19 |
With a specific allowance recorded, Cash Basis Income Recognized | 10 | 7 | 17 |
Residential Mortgage Loans [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 6,015 | 13,321 | |
With no specific allowance recorded, Recorded Investment | 4,518 | 11,309 | |
With no specific allowance recorded, Average Recorded Investment | 5,287 | 14,679 | 22,526 |
With no specific allowance recorded, Interest Income Recognized | 77 | 361 | 613 |
With no specific allowance recorded, Cash Basis Income Recognized | 175 | 449 | 715 |
With a specific allowance recorded, Unpaid Principal Balance | 14,691 | 8,897 | |
With a specific allowance recorded, Recorded Investment | 14,691 | 8,897 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 1,751 | 1,675 | |
With a specific allowance recorded, Average Recorded Investment | 15,039 | 4,077 | 1,242 |
With a specific allowance recorded, Interest Income Recognized | 561 | 342 | |
With a specific allowance recorded, Cash Basis Income Recognized | 581 | 342 | |
Total Recorded Investment | 19,209 | 20,206 | |
Residential Mortgage Loans [Member] | One-to Four-Family [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 6,015 | 13,321 | |
With no specific allowance recorded, Recorded Investment | 4,518 | 11,309 | |
With no specific allowance recorded, Average Recorded Investment | 5,287 | 14,679 | 22,526 |
With no specific allowance recorded, Interest Income Recognized | 77 | 361 | 613 |
With no specific allowance recorded, Cash Basis Income Recognized | 175 | 449 | 715 |
With a specific allowance recorded, Unpaid Principal Balance | 14,691 | 8,897 | |
With a specific allowance recorded, Recorded Investment | 14,691 | 8,897 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 1,751 | 1,675 | |
With a specific allowance recorded, Average Recorded Investment | 15,039 | 4,077 | 1,242 |
With a specific allowance recorded, Interest Income Recognized | 561 | 342 | |
With a specific allowance recorded, Cash Basis Income Recognized | 581 | 342 | |
Consumer Loans [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 2,223 | 7,132 | |
With no specific allowance recorded, Recorded Investment | 1,531 | 6,422 | |
With no specific allowance recorded, Average Recorded Investment | 2,162 | 9,310 | 6,555 |
With no specific allowance recorded, Interest Income Recognized | 33 | 257 | 266 |
With no specific allowance recorded, Cash Basis Income Recognized | 90 | 326 | 380 |
With a specific allowance recorded, Unpaid Principal Balance | 10,313 | 7,399 | |
With a specific allowance recorded, Recorded Investment | 10,312 | 7,399 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 842 | 859 | |
With a specific allowance recorded, Average Recorded Investment | 10,780 | 2,715 | 27 |
With a specific allowance recorded, Interest Income Recognized | 493 | 319 | |
With a specific allowance recorded, Cash Basis Income Recognized | 510 | 319 | |
Total Recorded Investment | 11,843 | 13,821 | |
Consumer Loans [Member] | Auto [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 47 | 83 | |
With no specific allowance recorded, Recorded Investment | 37 | 66 | |
With no specific allowance recorded, Average Recorded Investment | 66 | 45 | 52 |
With no specific allowance recorded, Interest Income Recognized | 1 | 1 | 1 |
With no specific allowance recorded, Cash Basis Income Recognized | 4 | 6 | 6 |
With a specific allowance recorded, Unpaid Principal Balance | 7 | | |
With a specific allowance recorded, Recorded Investment | 6 | | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 1 | | |
With a specific allowance recorded, Average Recorded Investment | 8 | | |
Consumer Loans [Member] | Home Equity [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 1,901 | 6,458 | |
With no specific allowance recorded, Recorded Investment | 1,262 | 5,808 | |
With no specific allowance recorded, Average Recorded Investment | 1,757 | 8,404 | 5,571 |
With no specific allowance recorded, Interest Income Recognized | 29 | 234 | 265 |
With no specific allowance recorded, Cash Basis Income Recognized | 71 | 285 | 326 |
With a specific allowance recorded, Unpaid Principal Balance | 9,577 | 6,743 | |
With a specific allowance recorded, Recorded Investment | 9,577 | 6,743 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 722 | 719 | |
With a specific allowance recorded, Average Recorded Investment | 10,007 | 2,369 | |
With a specific allowance recorded, Interest Income Recognized | 470 | 303 | |
With a specific allowance recorded, Cash Basis Income Recognized | 487 | 303 | |
Consumer Loans [Member] | Marine [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 151 | 160 | |
With no specific allowance recorded, Recorded Investment | 151 | 160 | |
With no specific allowance recorded, Average Recorded Investment | 155 | 174 | 268 |
With no specific allowance recorded, Cash Basis Income Recognized | 9 | 9 | 13 |
Consumer Loans [Member] | Recreational Vehicle [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | 124 | 429 | |
With no specific allowance recorded, Recorded Investment | 81 | 386 | |
With no specific allowance recorded, Average Recorded Investment | 181 | 685 | 659 |
With no specific allowance recorded, Interest Income Recognized | 3 | 22 | |
With no specific allowance recorded, Cash Basis Income Recognized | 6 | 26 | 35 |
With a specific allowance recorded, Unpaid Principal Balance | 729 | 656 | |
With a specific allowance recorded, Recorded Investment | 729 | 656 | |
With a specific allowance recorded, Allowance for Loan Losses Allocated | 119 | 140 | |
With a specific allowance recorded, Average Recorded Investment | 765 | 346 | 27 |
With a specific allowance recorded, Interest Income Recognized | 23 | 16 | |
With a specific allowance recorded, Cash Basis Income Recognized | 23 | 16 | |
Consumer Loans [Member] | Other [Member] | | | |
Schedule Of Financial Receivables [Line Items] | | | |
With no specific allowance recorded, Unpaid Principal Balance | | 2 | |
With no specific allowance recorded, Recorded Investment | | 2 | |
With no specific allowance recorded, Average Recorded Investment | $3 | $2 | $5 |