Loans Receivable, Part IV (Details) - USD ($) | 9 Months Ended | 12 Months Ended |
Sep. 30, 2016 | Dec. 31, 2015 |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | $ 1,151,696,000 | $ 1,114,934,000 |
Loans requiring an officers' loans committee review and approval, minimum | 500,000 | |
Minimum amount of potential loan exposure to be reviewed by credit management personnel | $ 1,000,000 | |
Maximum period of time loan is reviewed if renewed | 1 year | |
Period of time sales of real estate owned fair value is based | 2 years | |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | $ 3,694,000 | 9,600,000 |
Total Impaired, with no Reserve, Recorded Investment | 13,874,000 | 17,945,000 |
Total Impaired, Recorded Investment | 17,568,000 | 27,545,000 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 4,143,000 | 11,142,000 |
Total Impaired with no Reserve, Unpaid Principal Balance | 16,208,000 | 20,499,000 |
Total Impaired, Unpaid Principal Balance, Total | 20,351,000 | 31,641,000 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 683,000 | 1,576,000 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 683,000 | 1,576,000 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 449,000 | 1,542,000 |
Total Impaired with no Reserve, Cumulative Charge-offs | 2,334,000 | 2,554,000 |
Total Impaired, Cumulative Charge-offs | 2,783,000 | 4,096,000 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 3,773,000 | 9,858,000 |
Total Impaired with no Reserve, Average Recorded Investment | 14,278,000 | 18,403,000 |
Total Impaired, Average Recorded Investment, Total | 18,051,000 | 28,261,000 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 134,000 | 469,000 |
Total Impaired with no Reserve, Interest Paid YTD | 468,000 | 894,000 |
Total Impaired, Interest Paid YTD | 602,000 | 1,363,000 |
Charge-offs recorded to reduce the unpaid principal balance | 2,300,000 | |
Total impaired loans including troubled debt restructurings | 10,662,000 | 17,539,000 |
Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 17,035,000 | 26,000,000 |
Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 17,859,000 | 16,677,000 |
Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 1,116,802,000 | 1,072,257,000 |
Residential Real Estate [Member] | One- to four-family [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 389,267,000 | 381,992,000 |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | 3,249,000 | 7,903,000 |
Total Impaired, with no Reserve, Recorded Investment | 8,772,000 | 10,482,000 |
Total Impaired, Recorded Investment | 12,021,000 | 18,385,000 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 3,289,000 | 8,923,000 |
Total Impaired with no Reserve, Unpaid Principal Balance | 10,087,000 | 11,991,000 |
Total Impaired, Unpaid Principal Balance, Total | 13,376,000 | 20,914,000 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 532,000 | 1,114,000 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 532,000 | 1,114,000 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 40,000 | 1,020,000 |
Total Impaired with no Reserve, Cumulative Charge-offs | 1,315,000 | 1,509,000 |
Total Impaired, Cumulative Charge-offs | 1,355,000 | 2,529,000 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 3,307,000 | 8,113,000 |
Total Impaired with no Reserve, Average Recorded Investment | 8,944,000 | 10,676,000 |
Total Impaired, Average Recorded Investment, Total | 12,251,000 | 18,789,000 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 113,000 | 393,000 |
Total Impaired with no Reserve, Interest Paid YTD | 262,000 | 500,000 |
Total Impaired, Interest Paid YTD | 375,000 | 893,000 |
Total impaired loans including troubled debt restructurings | 5,746,000 | 9,639,000 |
Residential Real Estate [Member] | One- to four-family [Member] | Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 14,415,000 | 19,148,000 |
Residential Real Estate [Member] | One- to four-family [Member] | Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 9,923,000 | 11,352,000 |
Residential Real Estate [Member] | One- to four-family [Member] | Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 364,929,000 | 351,492,000 |
Residential Real Estate [Member] | Multi Family [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 551,487,000 | 547,250,000 |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | 0 | 1,055,000 |
Total Impaired, with no Reserve, Recorded Investment | 3,967,000 | 4,045,000 |
Total Impaired, Recorded Investment | 3,967,000 | 5,100,000 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 0 | 1,055,000 |
Total Impaired with no Reserve, Unpaid Principal Balance | 4,986,000 | 5,090,000 |
Total Impaired, Unpaid Principal Balance, Total | 4,986,000 | 6,145,000 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 0 | 242,000 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 0 | 242,000 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired with no Reserve, Cumulative Charge-offs | 1,019,000 | 1,045,000 |
Total Impaired, Cumulative Charge-offs | 1,019,000 | 1,045,000 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 0 | 1,044,000 |
Total Impaired with no Reserve, Average Recorded Investment | 4,008,000 | 4,106,000 |
Total Impaired, Average Recorded Investment, Total | 4,008,000 | 5,150,000 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 0 | 42,000 |
Total Impaired with no Reserve, Interest Paid YTD | 174,000 | 245,000 |
Total Impaired, Interest Paid YTD | 174,000 | 287,000 |
Total impaired loans including troubled debt restructurings | 3,967,000 | 4,863,000 |
Residential Real Estate [Member] | Multi Family [Member] | Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 1,445,000 | 2,553,000 |
Residential Real Estate [Member] | Multi Family [Member] | Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 2,920,000 | 3,634,000 |
Residential Real Estate [Member] | Multi Family [Member] | Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 547,122,000 | 541,063,000 |
Residential Real Estate [Member] | Home Equity [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 22,394,000 | 24,326,000 |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | 158,000 | 169,000 |
Total Impaired, with no Reserve, Recorded Investment | 215,000 | 303,000 |
Total Impaired, Recorded Investment | 373,000 | 472,000 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 158,000 | 169,000 |
Total Impaired with no Reserve, Unpaid Principal Balance | 215,000 | 303,000 |
Total Impaired, Unpaid Principal Balance, Total | 373,000 | 472,000 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 73,000 | 108,000 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 73,000 | 108,000 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired with no Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired, Cumulative Charge-offs | 0 | 0 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 165,000 | 174,000 |
Total Impaired with no Reserve, Average Recorded Investment | 224,000 | 307,000 |
Total Impaired, Average Recorded Investment, Total | 389,000 | 481,000 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 10,000 | 10,000 |
Total Impaired with no Reserve, Interest Paid YTD | 6,000 | 13,000 |
Total Impaired, Interest Paid YTD | 16,000 | 23,000 |
Total impaired loans including troubled debt restructurings | 152,000 | 98,000 |
Residential Real Estate [Member] | Home Equity [Member] | Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 406,000 | 684,000 |
Residential Real Estate [Member] | Home Equity [Member] | Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 194,000 | 128,000 |
Residential Real Estate [Member] | Home Equity [Member] | Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 21,794,000 | 23,514,000 |
Construction and Land [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 21,571,000 | 19,148,000 |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | 0 | 156,000 |
Total Impaired, with no Reserve, Recorded Investment | 437,000 | 1,639,000 |
Total Impaired, Recorded Investment | 437,000 | 1,795,000 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 0 | 269,000 |
Total Impaired with no Reserve, Unpaid Principal Balance | 437,000 | 1,639,000 |
Total Impaired, Unpaid Principal Balance, Total | 437,000 | 1,908,000 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 0 | 3,000 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 0 | 3,000 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 0 | 113,000 |
Total Impaired with no Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired, Cumulative Charge-offs | 0 | 113,000 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 0 | 155,000 |
Total Impaired with no Reserve, Average Recorded Investment | 615,000 | 1,827,000 |
Total Impaired, Average Recorded Investment, Total | 615,000 | 1,982,000 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 0 | 0 |
Total Impaired with no Reserve, Interest Paid YTD | 15,000 | 62,000 |
Total Impaired, Interest Paid YTD | 15,000 | 62,000 |
Total impaired loans including troubled debt restructurings | 438,000 | 1,556,000 |
Construction and Land [Member] | Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 0 | 1,794,000 |
Construction and Land [Member] | Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 873,000 | 0 |
Construction and Land [Member] | Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 20,698,000 | 17,354,000 |
Commercial Real Estate [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 137,298,000 | 118,820,000 |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | 286,000 | 314,000 |
Total Impaired, with no Reserve, Recorded Investment | 440,000 | 1,452,000 |
Total Impaired, Recorded Investment | 726,000 | 1,766,000 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 695,000 | 723,000 |
Total Impaired with no Reserve, Unpaid Principal Balance | 440,000 | 1,452,000 |
Total Impaired, Unpaid Principal Balance, Total | 1,135,000 | 2,175,000 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 77,000 | 106,000 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 77,000 | 106,000 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 409,000 | 409,000 |
Total Impaired with no Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired, Cumulative Charge-offs | 409,000 | 409,000 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 299,000 | 367,000 |
Total Impaired with no Reserve, Average Recorded Investment | 440,000 | 1,458,000 |
Total Impaired, Average Recorded Investment, Total | 739,000 | 1,825,000 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 11,000 | 23,000 |
Total Impaired with no Reserve, Interest Paid YTD | 10,000 | 72,000 |
Total Impaired, Interest Paid YTD | 21,000 | 95,000 |
Total impaired loans including troubled debt restructurings | 359,000 | 1,383,000 |
Commercial Real Estate [Member] | Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 725,000 | 1,766,000 |
Commercial Real Estate [Member] | Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 1,053,000 | 1,161,000 |
Commercial Real Estate [Member] | Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 135,520,000 | 115,893,000 |
Consumer [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 339,000 | 361,000 |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | 0 | 0 |
Total Impaired, with no Reserve, Recorded Investment | 0 | 0 |
Total Impaired, Recorded Investment | 0 | 0 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 0 | 0 |
Total Impaired with no Reserve, Unpaid Principal Balance | 0 | 0 |
Total Impaired, Unpaid Principal Balance, Total | 0 | 0 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 0 | 0 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 0 | 0 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired with no Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired, Cumulative Charge-offs | 0 | 0 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 0 | 0 |
Total Impaired with no Reserve, Average Recorded Investment | 0 | 0 |
Total Impaired, Average Recorded Investment, Total | 0 | 0 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 0 | 0 |
Total Impaired with no Reserve, Interest Paid YTD | 0 | 0 |
Total Impaired, Interest Paid YTD | 0 | 0 |
Consumer [Member] | Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 0 | 0 |
Consumer [Member] | Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 0 | 0 |
Consumer [Member] | Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 339,000 | 361,000 |
Commercial Loans [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 29,340,000 | 23,037,000 |
Impaired Loans Receivable, Recorded Investment [Abstract] | | |
Total Impaired, with Reserve, Recorded Investment | 1,000 | 3,000 |
Total Impaired, with no Reserve, Recorded Investment | 43,000 | 24,000 |
Total Impaired, Recorded Investment | 44,000 | 27,000 |
Impaired Loans Receivable, Unpaid Principal Balance [Abstract] | | |
Total Impaired with Reserve, Unpaid Principal Balance | 1,000 | 3,000 |
Total Impaired with no Reserve, Unpaid Principal Balance | 43,000 | 24,000 |
Total Impaired, Unpaid Principal Balance, Total | 44,000 | 27,000 |
Impaired Loans Receivable, Reserve [Abstract] | | |
Total Impaired with Reserve, Reserve | 1,000 | 3,000 |
Total Impaired with no Reserve, Reserve | 0 | 0 |
Impaired Loans, Reserve | 1,000 | 3,000 |
Impaired Loans Receivable, Cumulative Charge Offs [Abstract] | | |
Total Impaired with Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired with no Reserve, Cumulative Charge-offs | 0 | 0 |
Total Impaired, Cumulative Charge-offs | 0 | 0 |
Impaired Loans Receivable, Average Recorded Investment [Abstract] | | |
Total Impaired with Reserve, Average Recorded Investment | 2,000 | 5,000 |
Total Impaired with no Reserve, Average Recorded Investment | 47,000 | 29,000 |
Total Impaired, Average Recorded Investment, Total | 49,000 | 34,000 |
Impaired Loans Receivable, Interest Paid YTD [Abstract] | | |
Total Impaired with Reserve, Interest Paid YTD | 0 | 1,000 |
Total Impaired with no Reserve, Interest Paid YTD | 1,000 | 2,000 |
Total Impaired, Interest Paid YTD | 1,000 | 3,000 |
Commercial Loans [Member] | Substandard [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 44,000 | 55,000 |
Commercial Loans [Member] | Watch [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | 2,896,000 | 402,000 |
Commercial Loans [Member] | Pass [Member] | | |
Loans Receivable, Recorded Investment [Line Items] | | |
Loans receivable, net | $ 26,400,000 | $ 22,580,000 |