BankFinancial (BFIN) 10-Q 26 Oct 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 24, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2,016
Entity Registrant Name	BankFinancial CORP
Entity Central Index Key	1,303,942
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		19,271,211
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and due from other financial institutions	$ 9,499	$ 13,192
Interest-bearing deposits in other financial institutions	91,031	46,185
Cash and cash equivalents	100,530	59,377
Securities, at fair value	99,899	114,753
Loans receivable, net of allowance for loan losses: September 30, 2016, $8,334 and December 31, 2015, $9,691	1,241,808	1,232,257
Other Real Estate Owned At Carrying Value	4,381	7,011
Stock in Federal Home Loan Bank, at cost	6,257	6,257
Premises and equipment, net	31,856	32,726
Accrued interest receivable	4,156	4,226
Core deposit intangible	911	1,305
Bank owned life insurance	22,538	22,387
Deferred Tax Assets, Net, Current	23,715	26,695
Other assets	4,222	5,449
Total assets	1,540,273	1,512,443
Deposits
Noninterest-bearing	234,652	254,830
Interest-bearing	1,082,043	958,089
Total deposits	1,316,695	1,212,919
Borrowings	1,406	64,318
Advance payments by borrowers taxes and insurance	8,470	11,528
Accrued interest payable and other liabilities	10,035	11,314
Total liabilities	1,336,606	1,300,079
Commitments and contingent liabilities
Stockholders' equity:
Preferred Stock, $0.01 par value, 25,000,000 shares authorized, none issued or outstanding	0	0
Common Stock, $0.01 par value, 100,000,000 shares authorized; 19,271,211 shares issued at September 30, 2016 and 20,297,317 issued at December 31, 2015	193	203
Additional paid-in capital	173,185	184,797
Retained earnings (deficit)	38,380	36,114
Unearned Employee Stock Ownership Plan shares	(8,564)	(9,297)
Accumulated other comprehensive income	473	547
Total stockholders' equity	203,667	212,364
Total liabilities and stockholders' equity	$ 1,540,273	$ 1,512,443

Consolidated Statements of Fin3

Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 8,334	$ 9,691
Preferred Stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized	25,000,000	25,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value (usd per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	19,271,211	20,297,317

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest and dividend income
Loans, including fees	$ 12,388	$ 11,792	$ 36,834	$ 35,451
Securities	306	267	927	851
Other	151	88	424	249
Total interest income	12,845	12,147	38,185	36,551
Interest expense
Deposits	1,012	695	2,749	2,068
Borrowings	2	4	73	8
Total interest expense	1,014	699	2,822	2,076
Net interest income	11,831	11,448	35,363	34,475
Provision for (recovery of) loan losses	(525)	(956)	300	(2,168)
Net interest income	12,356	12,404	35,063	36,643
Noninterest income
Deposit service charges and fees	583	648	1,691	1,645
Other fee income	478	502	1,478	1,638
Insurance commissions and annuities income	53	68	180	217
Gain on sale of loans, net	38	37	59	92
Gain on Sale of Securities, Net	0	0	46	0
Loss on Disposition of Property Plant Equipment			0	(1)
Loan servicing fees	66	85	214	271
Amortization and impairment of servicing assets	(28)	(50)	(96)	(107)
Bank Owned Life Insurance Income	54	48	151	142
Trust	167	172	492	529
Other	226	199	553	507
Total noninterest income	1,637	1,709	4,768	4,934
Noninterest expense
Compensation and benefits	5,315	5,329	17,021	16,188
Office occupancy and equipment	1,487	1,537	4,769	4,902
Advertising and public relations	144	212	618	783
Information technology	707	686	2,130	1,982
Supplies, telephone, and postage	345	393	1,018	1,189
Amortization of intangibles	129	136	394	414
Nonperforming asset management	89	244	300	442
Operations of other real estate owned	243	334	768	780
FDIC insurance premiums	238	202	691	699
Other	1,215	1,159	3,639	3,397
Total noninterest expense	9,912	10,232	31,348	30,776
Income before income taxes	4,081	3,881	8,483	10,801
Income tax expense	1,573	1,532	3,240	4,242
Net income	$ 2,508	$ 2,349	$ 5,243	$ 6,559
Basic earnings per common share (usd per share)	$ 0.13	$ 0.12	$ 0.27	$ 0.33
Diluted earnings per common share (usd per share)	$ 0.13	$ 0.12	$ 0.27	$ 0.33
Weighted average common shares outstanding (shares)	18,788,731	19,725,707	19,114,603	19,999,089
Diluted weighted average common shares outstanding (shares)	18,789,054	19,731,302	19,114,918	20,004,694

Consolidated Statements Compreh

Consolidated Statements Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income	$ 2,508	$ 2,349	$ 5,243	$ 6,559
Unrealized holding gain (loss) arising during the period	13	34	75	244
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	5	13	29	93
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(8)	(21)	(46)	(151)
Other than Temporary Impairment Losses, Investments, Reclassification Adjustment of Noncredit Portion Included in Net Income, Availabe-for-sale Securities, before Tax	0	0	(46)	0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	0	0	18	0
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Net of Tax, Portion Attributable to Parent, Available-for-sale Securities	0		(28)
Other Comprehensive Income (Loss), Net of Tax	(8)	(21)	(74)	(151)
Comprehensive income (loss)	$ 2,500	$ 2,328	$ 5,169	$ 6,408

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Unearned Employee Stock Ownership Plan Shares	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2014	$ 216,121	$ 211	$ 193,845	$ 31,584	$ (10,276)	$ 757
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,559	0	0	6,559	0	0
Other comprehensive income, net of tax effects	(151)	0	0	0	0	(151)
Payments for Repurchase of Common Stock	(7,388)	6	7,382
Nonvested stock awards-stock-based compensation expense	351	0	351	0	0	0
Cash dividends declared on common stock (2015: $0.16, 2016: $0.15, per share)		0
ESOP shares earned	910		178	0	732	0
Ending Balance at Sep. 30, 2015	213,074	205	186,992	34,815	(9,544)	606
Beginning Balance at Dec. 31, 2015	212,364	203	184,797	36,114	(9,297)	547
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,243	0	0	5,243	0	0
Other comprehensive income, net of tax effects	(74)	0	0	0	0	(74)
Payments for Repurchase of Common Stock	(12,695)	10	12,685
Nonvested stock awards-stock-based compensation expense	875	0	875	0	0	0
Cash dividends declared on common stock (2015: $0.16, 2016: $0.15, per share)	2,977			2,977
ESOP shares earned	931	0	198	0	733	0
Ending Balance at Sep. 30, 2016	$ 203,667	$ 193	$ 173,185	$ 38,380	$ (8,564)	$ 473

Consolidated Statements of Cha7

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Common Stock, Dividends, Per Share, Declared	$ 0.15	$ 0.16
Stock Repurchased and Retired During Period, Shares	1,026,106	600,000,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flow - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net income	$ 5,243	$ 6,559
Adjustments to reconcile to net loss to net cash from operating activities
Provision for (recovery of) loan losses	300	(2,168)
ESOP shares earned	931	910
Stock-based compensation expense	875	351
Depreciation and amortization	2,815	2,754
Amortization of premiums and discounts on securities and loans	(104)	(214)
Amortization Of Intangibles	394	414
Amortization and impairment of servicing assets	96	107
Net change in net deferred loan origination costs	(36)	(384)
Net loss on sale of other real estate owned	(15)	(91)
Net gain on sale of loans	(59)	(92)
Loans originated for sale	(1,097)	(3,593)
Proceeds from sale of loans	1,156	3,685
REO valuation adjustments	244	467
Net change in:
Accrued interest receivable	70	(74)
Earnings on bank owned life insurance	(151)	(142)
Other assets	3,515	5,906
Accrued interest payable and other liabilities	(1,279)	(2,154)
Net cash from operating activities	12,852	12,242
Gain on Sale of Securities, Net	(46)	0
Loss on Disposition of Property Plant Equipment	0	(1)
Securities
Proceeds from maturities	58,577	53,410
Proceeds from principal repayments	3,545	5,888
Proceeds from Sale of Available-for-sale Securities	46	0
Purchases of securities	(47,423)	(42,643)
Loans receivable
Increase (Decrease) in Participation Liabilities	3,023	3,350
Principal payments on loans receivable	366,784	333,644
Proceeds from Sale of Loans Receivable	14,746	0
Originated for investment	(395,087)	(326,624)
Proceeds from sale of other real estate owned	2,616	2,487
Purchases of premises and equipment, net	(660)	(363)
Net cash from (used in) investing activities	6,167	29,149
Cash flows from financing activities
Net change in deposits	103,776	(30,179)
Net change in borrowings	(62,912)	5,127
Net change in advance payments by borrowers for taxes and insurance	(3,058)	(3,734)
Payments for Repurchase of Common Stock	(12,695)	(7,388)
Payments of Ordinary Dividends, Common Stock	(2,977)	(3,328)
Net cash used in financing activities	22,134	(39,502)
Net change in cash and cash equivalents	41,153	1,889
Beginning cash and cash equivalents	59,377	59,581
Ending cash and cash equivalents	100,530	61,470
Supplemental disclosures of cash flow information:
Interest paid	2,704	2,113
Income taxes paid	182	262
Loans transferred to other real estate owned	$ 215	$ 1,314

Summary of Significant Accounti

Summary of Significant Accounting Policies (Notes)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Basis of Presentation : BankFinancial Corporation, a Maryland corporation headquartered in Burr Ridge, Illinois, is the owner of all of the issued and outstanding capital stock of BankFinancial, F.S.B. (the “Bank”). The interim unaudited consolidated financial statements include the accounts of and transactions of BankFinancial Corporation, the Bank, and the Bank’s wholly-owned subsidiaries, Financial Assurance Services, Inc. and BF Asset Recovery Corporation (collectively, “the Company”), and reflect all normal and recurring adjustments that are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three- and nine-month periods ended September 30, 2016 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2016. Certain information and note disclosures normally included in financial statements prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. Use of Estimates : To prepare financial statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and future results could differ. Reclassifications : Certain reclassifications have been made in the prior period’s financial statements to conform them to the current period’s presentation. These unaudited consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 , as filed with the Securities and Exchange Commission. Recent Accounti

Earnings Per Share (Notes)

Earnings Per Share (Notes)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	E Amounts reported in earnings per share reflect earnings available to common stockholders for the period divided by the weighted average number of shares of common stock outstanding during the period, exclusive of unearned ESOP shares and unvested restricted stock shares. Stock options and restricted stock are regarded as potential common stock and are considered in the diluted earnings per share calculations to the extent that they would have a dilutive effect if converted to common stock. Three Months Ended Nine Months Ended 2016 2015 2016 2015 Net income available to common stockholders $ 2,508 $ 2,349 $ 5,243 $ 6,559 Average common shares outstanding 19,460,022 20,501,966 19,813,088 20,803,065 Less: Unearned ESOP shares (670,351 ) (768,327 ) (694,655 ) (792,551 ) Unvested restricted stock shares (940 ) (7,932 ) (3,830 ) (11,425 ) Weighted average common shares outstanding 18,788,731 19,725,707 19,114,603 19,999,089 Add - Net effect of dilutive unvested restricted stock 323 5,595 315 5,605 Diluted weighted average common shares outstanding 18,789,054 19,731,302 19,114,918 20,004,694 Basic earnings per common share $ 0.13 $ 0.12 $ 0.27 $ 0.33 Diluted earnings per common share $ 0.13 $ 0.12 $ 0.27 $ 0.33 Number of antidilutive stock options excluded from the diluted earnings per share calculation 536,459 — 536,459 — Weighted average exercise price of anti-dilutive option shares $ 12.99 $ — $ 12.99 $ —

Securities (Notes)

Securities (Notes)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
SECURITIES	The fair value of securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income are shown below. Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2016 Certificates of deposit $ 76,901 $ — $ — $ 76,901 Equity mutual fund 500 15 — 515 Mortgage-backed securities - residential 15,796 756 — 16,552 Collateralized mortgage obligations - residential 5,917 16 (20 ) 5,913 SBA-guaranteed loan participation certificates 18 — — 18 $ 99,132 $ 787 $ (20 ) $ 99,899 December 31, 2015 Certificates of deposit $ 87,901 $ — $ — $ 87,901 Equity mutual fund 500 7 — 507 Mortgage-backed securities - residential 18,330 880 (30 ) 19,180 Collateralized mortgage obligations - residential 7,111 41 (10 ) 7,142 SBA-guaranteed loan participation certificates 23 — — 23 $ 113,865 $ 928 $ (40 ) $ 114,753 The mortgage-backed securities and collateralized mortgage obligations reflected in the preceding table were issued by U.S. government-sponsored entities or agencies, Freddie Mac, Fannie Mae and Ginnie Mae, and are obligations which the government has affirmed its commitment to support. All securities reflected in the preceding table were classified as available-for-sale at September 30, 2016 and December 31, 2015 . The amortized cost and fair values of securities by contractual maturity are shown below. Securities not due at a single maturity date are shown separately. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2016 Amortized Cost Fair Value Due in one year or less $ 76,901 $ 76,901 Equity mutual fund 500 515 Mortgage-backed securities - residential 15,796 16,552 Collateralized mortgage obligations - residential 5,917 5,913 SBA-guaranteed loan participation certificates 18 18 $ 99,132 $ 99,899 Sales of securities were as follows: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Proceeds $ — $ — $ 46 $ — Gross gains — — 46 — Gross losses — — — — Securities with unrealized losses not recognized in income are as follows: Less than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss September 30, 2016 Collateralized mortgage obligations - residential $ 3,030 $ (12 ) $ 1,095 $ (8 ) $ 4,125 $ (20 ) December 31, 2015 Mortgage-backed securities - residential $ — $ — $ 1,724 $ (30 ) $ 1,724 $ (30 ) Collateralized mortgage obligations - residential — — 1,299 (10 ) 1,299 (10 ) $ — $ — $ 3,023 $ (40 ) $ 3,023 $ (40 ) The Company evaluates marketable investment securities with significant declines in fair value on a quarterly basis to determine whether they should be considered other-than-temporarily impaired under current accounting guidance, which generally provides that if a marketable security is in an unrealized loss position, whether due to general market conditions or industry or issuer-specific factors, the holder of the securities must assess whether the impairment is other-than-temporary. Certain collateralized mortgage obligations that the Company holds in its investment portfolio were in an unrealized loss position at September 30, 2016 , but the unrealized losses were not considered significant under the Company’s impairment testing methodology. In addition, the Company does not intend to sell these securities, and it is likely that the Company will not be required to sell these securities before their anticipated recovery occurs.

Loans Receivable (Notes)

Loans Receivable (Notes)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Loans receivable are as follows: September 30, 2016 December 31, 2015 One-to-four family residential real estate $ 142,130 $ 159,501 Multi-family mortgage 505,369 506,026 Nonresidential real estate 186,504 226,735 Construction and land 1,005 1,313 Commercial loans 106,878 79,516 Commercial leases 304,753 265,405 Consumer 1,846 1,831 1,248,485 1,240,327 Net deferred loan origination costs 1,657 1,621 Allowance for loan losses (8,334 ) (9,691 ) Loans, net $ 1,241,808 $ 1,232,257 The following tables present the balance in the allowance for loan losses and the loans receivable by portfolio segment and based on impairment method: Allowance for loan losses Loan Balances Individually evaluated for impairment Collectively evaluated for impairment Total Individually evaluated for impairment Collectively evaluated for impairment Total September 30, 2016 One-to-four family residential real estate $ — $ 1,271 $ 1,271 $ 3,527 $ 138,603 $ 142,130 Multi-family mortgage 13 3,336 3,349 1,112 504,257 505,369 Nonresidential real estate 26 1,981 2,007 714 185,790 186,504 Construction and land — 24 24 — 1,005 1,005 Commercial loans — 769 769 — 106,878 106,878 Commercial leases — 894 894 — 304,753 304,753 Consumer — 20 20 — 1,846 1,846 $ 39 $ 8,295 $ 8,334 $ 5,353 $ 1,243,132 1,248,485 Net deferred loan origination costs 1,657 Allowance for loan losses (8,334 ) Loans, net $ 1,241,808 Allowance for loan losses Loan Balances Individually evaluated for impairment Collectively evaluated for impairment Total Individually evaluated for impairment Collectively evaluated for impairment Total December 31, 2015 One-to-four family residential real estate $ — $ 1,704 $ 1,704 $ 2,672 $ 156,829 $ 159,501 Multi-family mortgage 41 3,569 3,610 2,879 503,147 506,026 Nonresidential real estate 3 2,579 2,582 2,099 224,636 226,735 Construction and land — 43 43 — 1,313 1,313 Commercial loans — 654 654 — 79,516 79,516 Commercial leases — 1,073 1,073 — 265,405 265,405 Consumer — 25 25 — 1,831 1,831 $ 44 $ 9,647 $ 9,691 $ 7,650 $ 1,232,677 1,240,327 Net deferred loan origination costs 1,621 Allowance for loan losses (9,691 ) Loans, net $ 1,232,257 Activity in the allowance for loan losses is as follows: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 8,915 $ 10,810 $ 9,691 $ 11,990 Loans charged off: One-to-four family residential real estate (102 ) (125 ) (509 ) (327 ) Multi-family mortgage — (9 ) (51 ) (189 ) Nonresidential real estate (55 ) (26 ) (1,715 ) (289 ) Commercial loans — — — (98 ) Consumer (6 ) (3 ) (24 ) (11 ) (163 ) (163 ) (2,299 ) (914 ) Recoveries: One-to-four family residential real estate 5 16 92 295 Multi-family mortgage 10 169 156 177 Nonresidential real estate 39 24 200 49 Construction and land — 38 35 44 Commercial loans 45 143 150 606 Commercial leases 7 — 7 1 Consumer 1 — 2 1 107 390 642 1,173 Net recoveries (charge-offs) (56 ) 227 (1,657 ) 259 Provision for (recovery of) loan losses (525 ) (956 ) 300 (2,168 ) Ending balance $ 8,334 $ 10,081 $ 8,334 $ 10,081 The following tables present the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans: Loan Balance Recorded Investment Loans Past Due Over 90 Days, Still Accruing September 30, 2016 One-to-four family residential real estate $ 2,557 $ 2,120 $ — One-to-four family residential real estate – non owner occupied 497 571 — Multi-family mortgage - Illinois 552 508 — Nonresidential real estate 723 717 — $ 4,329 $ 3,916 $ — December 31, 2015 One-to-four family residential real estate $ 2,704 $ 2,263 $ — One-to-four family residential real estate – non owner occupied 92 192 — Multi-family mortgage - Illinois 829 821 — Nonresidential real estate 324 296 — $ 3,949 $ 3,572 $ — Nonaccrual loans and impaired loans are defined differently. Some loans may be included in both categories, and some may only be included in one category. Nonaccrual loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. The Company’s reserve for uncollected loan interest was $238,000 and $181,000 at September 30, 2016 and December 31, 2015 , respectively. When a loan is on nonaccrual status and the ultimate collectability of the total principal of an impaired loan is in doubt, all payments are applied to principal under the cost recovery method. Alternatively, when a loan is on non-accrual status but there is doubt concerning only the ultimate collectability of interest, contractual interest is credited to interest income only when received, under the cash basis method pursuant to the provisions of FASB ASC 310–10, as applicable. In all cases, the average balances are calculated based on the month–end balances of the financing receivables within the period reported pursuant to the provisions of FASB ASC 310–10, as applicable. The following tables present the aging of the recorded investment of loans at September 30, 2016 by class of loans: 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Loans Not Past Due Total One-to-four family residential real estate loans $ 543 $ 652 $ 1,815 $ 3,010 $ 98,669 $ 101,679 One-to-four family residential real estate loans – non-owner occupied 2 4 571 577 39,881 40,458 Multi-family mortgage - Illinois — — 508 508 298,572 299,080 Multi-family mortgage - Other — — — — 202,686 202,686 Nonresidential real estate — — 717 717 184,432 185,149 Construction — — — — 628 628 Land — — — — 374 374 Commercial loans: Regional commercial banking — — — — 34,452 34,452 Health care — — — — 34,348 34,348 Direct commercial lessor 236 — — 236 38,218 38,454 Commercial leases: Investment rated commercial leases 409 46 — 455 216,115 216,570 Other commercial leases — — — — 89,958 89,958 Consumer — — — — 1,854 1,854 $ 1,190 $ 702 $ 3,611 $ 5,503 $ 1,240,187 $ 1,245,690 The following tables present the aging of the recorded investment of loans at December 31, 2015 by class of loans: 30-59 Days Past Due 60-89 Days Past Due 90 Days or Total Past Due Loans Not Past Due Total One-to-four family residential real estate loans $ 2,000 $ 572 $ 1,997 $ 4,569 $ 109,893 $ 114,462 One-to-four family residential real estate loans – non-owner occupied 299 164 192 655 43,557 44,212 Multi-family mortgage - Illinois 651 283 821 1,755 312,620 314,375 Multi-family mortgage - Other — — — — 188,178 188,178 Nonresidential real estate — — 296 296 223,018 223,314 Construction — — — — 21 21 Land — — — — 1,279 1,279 Commercial loans: Regional commercial banking 4 150 — 154 29,890 30,044 Health care — — — — 31,862 31,862 Direct commercial lessor — — — — 17,873 17,873 Commercial leases: Investment rated commercial leases 50 363 — 413 170,859 171,272 Other commercial leases — — — — 95,800 95,800 Consumer 21 — — 21 1,819 1,840 $ 3,025 $ 1,532 $ 3,306 $ 7,863 $ 1,226,669 $ 1,234,532 The Company evaluates loan extensions or modifications in accordance with FASB ASC 310–40 with respect to the classification of the loan as a Troubled Debt Restructuring ("TDR"). In general, if the Company grants a loan extension or modification to a borrower for other than an insignificant period of time that includes a below–market interest rate, principal forgiveness, payment forbearance or other concession intended to minimize the economic loss to the Company, the loan extension or loan modification is classified as a TDR. In cases where borrowers are granted new terms that provide for a reduction of either interest or principal then due and payable, management measures any impairment on the restructured loan in the same manner as for impaired loans as noted above. The Company had $413,000 of TDRs at September 30, 2016 , compared to $2.7 million at December 31, 2015 . No specific valuation reserves were allocated to those loans at September 30, 2016 and December 31, 2015 . The Company had no outstanding commitments to borrowers whose loans were classified as TDRs at either date. During the first quarter of 2016, six loans totaling $1.5 million were declassified as TDRs as they successfully met the criteria for removal from TDR status. The following table presents loans classified as TDRs: September 30, 2016 December 31, 2015 One-to-four family residential real estate $ 183 $ 1,385 Multi-family mortgage — 1,119 Troubled debt restructured loans – accrual loans 183 2,504 One-to-four family residential real estate 230 174 Troubled debt restructured loans – nonaccrual loans 230 174 Total troubled debt restructured loans $ 413 $ 2,678 During the nine months ended September 30, 2016 and 2015 , the terms of certain loans were modified and classified as TDRs. The modification of the terms of such loans included one or a combination of the following: a reduction of the stated interest rate of the loan; an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk; or a permanent reduction of the recorded investment in the loan. The following tables present TDR activity: Three Months Ended September 30, 2016 2015 Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment One-to-four family residential real estate — $ — $ — 5 $ 338 $ 211 Due to Due to Due to Total For the Three Months Ended September 30, 2016 One-to-four family residential real estate — — — — For the Three Months Ended September 30, 2015 One-to-four family residential real estate — 79 132 211 The TDRs described above had no impact on interest income, resulted in no change to the allowance for loan losses allocated and resulted in $127,000 of charge-offs for the three months ended September 30, 2015 . Nine Months Ended September 30, 2016 2015 Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment One-to-four family residential real estate 1 $ 63 $ 63 6 $ 401 $ 274 Due to Due to Due to Total For the Nine Months Ended September 30, 2016 One-to-four family residential real estate $ — $ 63 $ — $ 63 For the Nine Months Ended September 30, 2015 One-to-four family residential real estate $ — $ 142 $ 132 $ 274 The TDRs described above had no impact on interest income, resulted in no change to the allowance for loan losses allocated and resulted in no charge-offs for the nine months ended September 30, 2016 . The TDRs had no material impact on interest income, resulted in no change to the allowance for loan losses allocated and resulted in $127,000 of charge-offs for the nine months ended September 30, 2015 . The following table presents TDRs for which there was a payment default during the nine months ended September 30, 2016 and 2015 within twelve months following the modification. 2016 2015 Number of loans Recorded investment Number of loans Recorded investment One-to-four family residential real estate 2 $ 87 1 $ 27 A TDR is considered to be in payment default once it is 90 days contractually past due under the modified terms. The TDRs for which there was a payment default resulted in no change to the allowance for loan losses allocated and resulted in no charge-offs during the nine months ended September 30, 2016 . The TDRs for which there was a payment default resulted in no change to the allowance for loan losses allocated and resulted in no charge-offs during the nine months ended September 30, 2015 . There were certain other loan modifications during the three and nine months ended September 30, 2016 and 2015 that did not meet the definition of a TDR. These loans had a total recorded investment of $615,000 and $2.6 million at September 30, 2016 and 2015 , respectively. The modification of these loans involved either a modification of the terms of a loan to borrowers who were not experiencing financial difficulties or a delay in a payment that was considered to be insignificant. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, including current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans based on credit risk. This analysis includes non-homogeneous loans, such as commercial and commercial real estate loans. This analysis is performed on a monthly basis. The Company uses the following definitions for risk ratings: Special Mention. A Special Mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the institution’s credit position at some future date. Special Mention assets are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification. Substandard. Loans categorized as Substandard continue to accrue interest, but exhibit a well-defined weakness or weaknesses that may jeopardize the liquidation of the debt. The loans continue to accrue interest because they are well secured and collection of principal and interest is expected within a reasonable time. The risk rating guidance published by the Office of the Comptroller of the Currency clarifies that a loan with a well-defined weakness does not have to present a probability of default for the loan to be rated Substandard, and that an individual loan’s loss potential does not have to be distinct for the loan to be rated Substandard. Nonaccrual. An asset classified Nonaccrual has all the weaknesses inherent in one classified Substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The loans were placed on nonaccrual status. Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered “Pass” rated loans. As of September 30, 2016 , based on the most recent analysis performed, the risk categories of loans by class of loans are as follows: Pass Special Mention Substandard Nonaccrual Total One-to-four family residential real estate loans $ 99,095 $ — $ 475 $ 2,120 $ 101,690 One-to-four family residential real estate loans – non-owner occupied 39,658 211 — 571 40,440 Multi-family mortgage loans - Illinois 297,485 329 2,119 507 300,440 Multi-family mortgage loans - Other 204,929 — — — 204,929 Nonresidential real estate loans 183,383 — 2,407 714 186,504 Construction loans 625 — — — 625 Land loans 380 — — — 380 Commercial loans: Regional commercial banking 34,254 — 75 — 34,329 Health care 34,290 — — — 34,290 Direct commercial lessor 36,989 1,270 — — 38,259 Commercial leases: Investment rated commercial leases 215,237 — — — 215,237 Other commercial leases 89,332 184 — — 89,516 Consumer 1,846 — — — 1,846 $ 1,237,503 $ 1,994 $ 5,076 $ 3,912 $ 1,248,485 As of December 31, 2015 , the risk categories of loans by class of loans are as follows: Pass Special Mention Substandard Nonaccrual Total One-to-four family residential real estate loans $ 112,449 $ — $ 576 $ 1,936 $ 114,961 One-to-four family residential real estate loans – non-owner occupied 43,858 219 271 192 44,540 Multi-family mortgage loans - Illinois 312,329 344 4,656 828 318,157 Multi-family mortgage loans - Other 187,358 — 511 — 187,869 Nonresidential real estate loans 219,859 1,600 4,981 295 226,735 Construction loans 21 — — — 21 Land loans 450 — 842 — 1,292 Commercial loans: Regional commercial banking 29,377 — 614 — 29,991 Health care 31,809 — — — 31,809 Direct commercial lessor 17,716 — — — 17,716 Commercial leases: Investment rated commercial leases 170,100 — — — 170,100 Other commercial leases 95,305 — — — 95,305 Consumer 1,831 — — — 1,831 $ 1,222,462 $ 2,163 $ 12,451 $ 3,251 $ 1,240,327

Fair Value (Notes)

Fair Value (Notes)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value	Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values: • Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date. • Level 2 – Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data. • Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. The Company used the following methods and significant assumptions to estimate the fair value of each type of financial instrument: Securities : The fair values of marketable equity securities are generally determined by quoted prices, in active markets, for each specific security (Level 1). If Level 1 measurement inputs are not available for a marketable equity security, we determine its fair value based on the quoted price of a similar security traded in an active market (Level 2). The fair values of debt securities are generally determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities, but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2). Impaired Loans: The fair value of impaired loans with specific allocations of the allowance for loan losses is generally based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available for similar loans and collateral underlying such loans. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted in accordance with the allowance policy. Other Real Estate Owned: Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals which are updated no less frequently than annually. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach with data from comparable properties. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Real estate owned properties are evaluated on a quarterly basis for additional impairment and adjusted accordingly. Mortgage Servicing Rights : On a quarterly basis, loan servicing rights are evaluated for impairment based upon the fair value of the rights as compared to carrying amount. The fair values of mortgage servicing rights are based on a valuation model that calculates the present value of estimated net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income. The Company is able to compare the valuation model inputs and results to widely available published industry data for reasonableness (Level 2). The following table sets forth the Company’s financial assets that were accounted for at fair value and are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value September 30, 2016 Securities: Certificates of deposit $ — $ 76,901 $ — $ 76,901 Equity mutual fund 515 — — 515 Mortgage-backed securities – residential — 16,552 — 16,552 Collateralized mortgage obligations – residential — 5,913 — 5,913 SBA-guaranteed loan participation certificates — 18 — 18 $ 515 $ 99,384 $ — $ 99,899 December 31, 2015 Securities: Certificates of deposit $ — $ 87,901 $ — $ 87,901 Equity mutual fund 507 — — 507 Mortgage-backed securities - residential — 19,180 — 19,180 Collateralized mortgage obligations – residential — 7,142 — 7,142 SBA-guaranteed loan participation certificates — 23 — 23 $ 507 $ 114,246 $ — $ 114,753 The following table sets forth the Company’s assets that were measured at fair value on a non-recurring basis: Fair Value Measurement Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value September 30, 2016 Impaired loans: Multi-family mortgage $ — $ — $ 112 $ 112 Nonresidential real estate — — 234 234 $ — $ — $ 346 $ 346 Other real estate owned: One-to-four family residential real estate $ — $ — $ 2,162 $ 2,162 Nonresidential real estate — — 674 674 $ — $ — $ 2,836 $ 2,836 Mortgage servicing rights $ — $ 240 $ — $ 240 December 31, 2015 Impaired loans: Multi-family mortgage $ — $ — $ 477 $ 477 Nonresidential real estate — — 36 36 $ — $ — $ 513 $ 513 Other real estate owned: One-to-four family residential real estate $ — $ — $ 42 $ 42 Multi-family mortgage — — 354 354 Nonresidential real estate — — 474 474 Land — — 794 794 $ — $ — $ 1,664 $ 1,664 Mortgage servicing rights $ — $ 281 $ — $ 281 Impaired loans that are measured for impairment using the fair value of the collateral for collateral–dependent loans and which have specific valuation allowances had a carrying amount of $385,000 , with a valuation allowance of $39,000 at September 30, 2016 , compared to a carrying amount of $557,000 and a valuation allowance of $44,000 at December 31, 2015 . The decrease in the valuation allowance resulted in a decrease in the provision for loan losses of $5,000 for the nine months ended September 30, 2016 . There was a decrease in the provision for loan losses of $384,000 for the nine months ended September 30, 2015 . OREO, which is carried at the lower of cost or fair value less costs to sell, had a carrying value of $3.2 million less a valuation allowance of $398,000 , or $2.8 million at September 30, 2016 , compared to a carrying value of $2.5 million less a valuation allowance of $881,000 , or $1.7 million at December 31, 2015 . There were $244,000 of valuation adjustments of OREO recorded for the nine months ended September 30, 2016 . There were $467,000 of valuation adjustments of OREO recorded for the nine months ended September 30, 2015 . Mortgage servicing rights, which are carried at lower of cost or fair value, had a carrying amount of $240,000 at September 30, 2016 , and a carrying amount of $281,000 at December 31, 2015 . There was no pre-tax provision for our mortgage servicing rights portfolio included in noninterest income for the nine months ended September 30, 2016 , compared to a pre-tax recovery of $2,000 for the same period in 2015 . The following table presents quantitative information, based on certain empirical data with respect to Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2016 : Fair Value Valuation Technique(s) Significant Unobservable Input(s) Range (Weighted Average) Impaired loans: Multi-family mortgage loans $ 112 Sales comparison Comparison between sales and income approaches 85.7% Income approach Cap Rate 10.0% Nonresidential real estate loans 234 Sales comparison Comparison between sales and income approaches -10.2% Income approach Cap Rate 8.5% Impaired loans $ 346 Other real estate owned: One-to-four family residential real estate $ 2,162 Sales comparison Discount applied to valuation 7.5% to 24.2% (17%) Nonresidential real estate loans 674 Sales comparison Comparison between sales and income approaches -3.2% to 54.9% Other real estate owned $ 2,836 The following table presents quantitative information, based on certain empirical data with respect to Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at December 31, 2015 : Fair Value Valuation Technique(s) Unobservable Input(s) Range (Weighted Average) Impaired loans Multi-family mortgage $ 477 Sales comparison Comparison between sales and income approaches 39.3% Income approach Cap Rate 8.75% Nonresidential real estate 36 Sales comparison Comparison between sales and income approaches 1.2% $ 513 Other real estate owned One-to-four family residential real estate $ 42 Sales comparison Discount applied to valuation -0.35% to 2.8% (0.03%) Multi-family mortgage 354 Sales comparison Comparison between sales and income approaches -67.74% to 10.37% (-13%) Nonresidential real estate 474 Sales comparison Comparison between sales and income approaches -15.6% to 1.46% (-5%) Land 794 Sales comparison Discount applied to valuation -7.7% to 17.24% (6%) $ 1,664 The carrying amount and estimated fair value of financial instruments are as follows: Fair Value Measurements at September 30, 2016 Using: Carrying Amount Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 100,530 $ 9,499 $ 91,031 $ — $ 100,530 Securities 99,899 515 99,384 — 99,899 Loans receivable, net of allowance for loan losses 1,241,808 — 1,262,883 346 1,263,229 FHLBC stock 6,257 — — — N/A Accrued interest receivable 4,156 — 4,156 — 4,156 Financial liabilities Noninterest-bearing demand deposits $ 234,652 $ — $ 234,652 $ — $ 234,652 Savings deposits 155,199 — 155,199 — 155,199 NOW and money market accounts 584,100 — 584,100 — 584,100 Certificates of deposit 342,744 — 342,797 — 342,797 Borrowings 1,406 — 1,407 — 1,407 Accrued interest payable 84 — 84 — 84 Fair Value Measurements at December 31, 2015 Using: Carrying Amount Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 59,377 $ 13,192 $ 46,185 $ — $ 59,377 Securities 114,753 507 114,246 — 114,753 Loans receivable, net of allowance for loan losses 1,232,257 — 1,240,791 513 1,241,304 FHLBC stock 6,257 — — — N/A Accrued interest receivable 4,226 — 4,226 — 4,226 Financial liabilities Noninterest-bearing demand deposits $ 254,830 $ — $ 254,830 $ — $ 254,830 Savings deposits 156,752 — 156,752 — 156,752 NOW and money market accounts 578,636 — 578,636 — 578,636 Certificates of deposit 222,701 — 222,026 — 222,026 Borrowings 64,318 — 64,318 — 64,318 Accrued interest payable 39 — 39 — 39 For purposes of the above, the following assumptions were used: Cash and Cash Equivalents : The estimated fair values for cash and cash equivalents are based on their carrying value due to the short-term nature of these assets. Loans : The estimated fair value for loans has been determined by calculating the present value of future cash flows based on the current rate the Company would charge for similar loans with similar maturities, applied for an estimated time period until the loan is assumed to be repriced or repaid. FHLBC Stock : It is not practicable to determine the fair value of FHLBC stock due to the restrictions placed on its transferability. Deposit Liabilities : The estimated fair value for certificates of deposit has been determined by calculating the present value of future cash flows based on estimates of rates the Company would pay on such deposits, applied for the time period until maturity. The estimated fair values of noninterest-bearing demand, NOW, money market, and savings deposits are assumed to approximate their carrying values as management establishes rates on these deposits at a level that approximates the local market area. Additionally, these deposits can be withdrawn on demand. Borrowings : The estimated fair values of advances from the FHLBC and notes payable are based on current market rates for similar financing. The estimated fair value of securities sold under agreements to repurchase is assumed to equal its carrying value due to the short-term nature of the liability. Accrued Interest : The estimated fair values of accrued interest receivable and payable are assumed to equal their carrying value. Off - Balance-Sheet Instruments : Off-balance-sheet items consist principally of unfunded loan commitments, standby letters of credit, and unused lines of credit. The estimated fair values of unfunded loan commitments, standby letters of credit, and unused lines of credit are not material. While the above estimates are based on management’s judgment of the most appropriate factors, as of the balance sheet date, there is no assurance that the estimated fair values would have been realized if the assets were disposed of or the liabilities settled at that date, since market values may differ depending on the various circumstances. The estimated fair values would also not apply to subsequent dates. In addition, other assets and liabilities that are not financial instruments, such as premises and equipment, are not included in the above disclosures.

Other Real Estate Owned (Notes)

Other Real Estate Owned (Notes)	9 Months Ended
	Sep. 30, 2016
Other Real Estate [Abstract]
Real Estate Owned [Text Block]	eal estate that is acquired through foreclosure or a deed in lieu of foreclosure is classified as other real estate owned ("OREO") until it is sold. When real estate is acquired through foreclosure or by deed in lieu of foreclosure, it is recorded at its fair value, less the estimated costs of disposal. If the fair value of the property is less than the loan balance, the difference is charged against the allowance for loan losses. September 30, 2016 December 31, 2015 Balance Valuation Allowance Net OREO Balance Balance Valuation Allowance Net OREO Balance One–to–four family residential $ 2,437 $ (156 ) $ 2,281 $ 2,684 $ (63 ) $ 2,621 Multi-family mortgage 430 (37 ) 393 1,025 (74 ) 951 Nonresidential real estate 1,022 (242 ) 780 1,986 (239 ) 1,747 Land 1,101 (174 ) 927 2,358 (666 ) 1,692 $ 4,990 $ (609 ) $ 4,381 $ 8,053 $ (1,042 ) $ 7,011 The following represents the roll forward of OREO and the composition of OREO properties: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Beginning balance $ 5,373 $ 5,539 $ 7,011 $ 6,358 New foreclosed properties 94 147 215 1,314 Valuation adjustments (115 ) (231 ) (244 ) (467 ) Sales (971 ) (646 ) (2,601 ) (2,396 ) Ending balance $ 4,381 $ 4,809 $ 4,381 $ 4,809 Activity in the valuation allowance is as follows: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Beginning balance $ 664 $ 1,102 $ 1,042 $ 896 Additions charged to expense 115 231 244 467 Reductions from sales of other real estate owned (170 ) (64 ) (677 ) (94 ) Ending balance $ 609 $ 1,269 $ 609 $ 1,269

Summary of Significant Accoun15

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Basis of Presentation : BankFinancial Corporation, a Maryland corporation headquartered in Burr Ridge, Illinois, is the owner of all of the issued and outstanding capital stock of BankFinancial, F.S.B. (the “Bank”). The interim unaudited consolidated financial statements include the accounts of and transactions of BankFinancial Corporation, the Bank, and the Bank’s wholly-owned subsidiaries, Financial Assurance Services, Inc. and BF Asset Recovery Corporation (collectively, “the Company”), and reflect all normal and recurring adjustments that are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three- and nine-month periods ended September 30, 2016 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2016. Certain information and note disclosures normally included in financial statements prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. Use of Estimates : To prepare financial statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and future results could differ. Reclassifications : Certain reclassifications have been made in the prior period’s financial statements to conform them to the current period’s presentation. These unaudited consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 , as filed with the Securities and Exchange Commission. Recent Accounti
Basis of Presentation	Basis of Presentation : BankFinancial Corporation, a Maryland corporation headquartered in Burr Ridge, Illinois, is the owner of all of the issued and outstanding capital stock of BankFinancial, F.S.B. (the “Bank”).
Principles of Consolidation	The interim unaudited consolidated financial statements include the accounts of and transactions of BankFinancial Corporation, the Bank, and the Bank’s wholly-owned subsidiaries, Financial Assurance Services, Inc. and BF Asset Recovery Corporation (collectively, “the Company”), and reflect all normal and recurring adjustments that are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three- and nine-month periods ended September 30, 2016 are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2016. Certain information and note disclosures normally included in financial statements prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. Use of Estimate
Use of Estimates	Use of Estimates : To prepare financial statements in conformity with GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and future results could differ.
Uncollected Interest Policy	The Company’s reserve for uncollected loan interest was $238,000 and $181,000 at September 30, 2016 and December 31, 2015 , respectively. When a loan is on nonaccrual status and the ultimate collectability of the total principal of an impaired loan is in doubt, all payments are applied to principal under the cost recovery method. Alternatively, when a loan is on non-accrual status but there is doubt concerning only the ultimate collectability of interest, contractual interest is credited to interest income only when received, under the cash basis method pursuant to the provisions of FASB ASC 310–10, as applicable. In all cases, the average balances are calculated based on the month–end balances of the financing receivables within the period reported pursuant to the provisions of FASB ASC 310–10, as applicable.
Reclassifications	Reclassifications : Certain reclassifications have been made in the prior period’s financial statements to conform them to the current period’s presentation. These unaudited consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 , as filed with the Securities and Exchange Commission.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued an update (ASU No. 2014-09, Revenue from Contracts with Customers) creating FASB Topic 606, Revenue from Contracts with Customers. The guidance in this update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (for example, insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides steps to follow to achieve the core principle. An entity should disclose sufficient information to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Qualitative and quantitative information is required about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. The amendments in this update originally were to become effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. During 2015, the FASB delayed the effectiveness by one year to annual periods and interim periods beginning after December 15, 2017. We are currently evaluating the impact of adopting the new guidance on the consolidated financial statements. On January 5, 2016, the FASB issued an update (ASU No. 2016-01, Financial Instruments - Recognition and Measurement of Financial Assets and Liabilities). The new guidance is intended to improve the recognition and measurement of financial instruments by requiring: equity investments (other than equity method or consolidation) to be measured at fair value with changes in fair value recognized in net income; public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; separate presentation of financial assets and financial liabilities by measurement category and form of financial assets (i.e. securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; eliminating the requirement to disclose the fair value of financial instruments measured at amortized cost for organizations that are not public business entities; eliminating the requirement for non-public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is to be required to be disclosed for financial instruments measured at amortized cost on the balance sheet; and requiring a reporting organization to present separately in other comprehensive income the portion of the total change in fair value of a liability resulting from the change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. The new guidance is effective for public business entities for fiscal years beginning after December 15, 2017. We are currently evaluating the impact of adopting the new guidance on the consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). The standard requires a lessee to recognize assets and liabilities on the balance sheet for leases with lease terms greater than 12 months. ASU 2016-02 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018, and early adoption is permitted. We are currently evaluating the impact that the standard will have on our consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). The standard is intended to simplify several areas of accounting for share-based compensation arrangements, including the income tax impact, classification on the statement of cash flows and forfeitures. ASU 2016-09 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is permitted. We are currently evaluating the impact that the standard will have on our consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). These amendments require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 is effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (i.e., January 1, 2020, for calendar year entities). Early application will be permitted for all organizations for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. We are currently evaluating the impact that the standard will have on our consolidated financial statements.

Summary of Significant Accoun16

Summary of Significant Accounting Policies New Accounting Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2016
Text Block [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the FASB issued an update (ASU No. 2014-09, Revenue from Contracts with Customers) creating FASB Topic 606, Revenue from Contracts with Customers. The guidance in this update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (for example, insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance provides steps to follow to achieve the core principle. An entity should disclose sufficient information to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Qualitative and quantitative information is required about contracts with customers, significant judgments and changes in judgments, and assets recognized from the costs to obtain or fulfill a contract. The amendments in this update originally were to become effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. During 2015, the FASB delayed the effectiveness by one year to annual periods and interim periods beginning after December 15, 2017. We are currently evaluating the impact of adopting the new guidance on the consolidated financial statements. On January 5, 2016, the FASB issued an update (ASU No. 2016-01, Financial Instruments - Recognition and Measurement of Financial Assets and Liabilities). The new guidance is intended to improve the recognition and measurement of financial instruments by requiring: equity investments (other than equity method or consolidation) to be measured at fair value with changes in fair value recognized in net income; public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; separate presentation of financial assets and financial liabilities by measurement category and form of financial assets (i.e. securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; eliminating the requirement to disclose the fair value of financial instruments measured at amortized cost for organizations that are not public business entities; eliminating the requirement for non-public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is to be required to be disclosed for financial instruments measured at amortized cost on the balance sheet; and requiring a reporting organization to present separately in other comprehensive income the portion of the total change in fair value of a liability resulting from the change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. The new guidance is effective for public business entities for fiscal years beginning after December 15, 2017. We are currently evaluating the impact of adopting the new guidance on the consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)” (“ASU 2016-02”). The standard requires a lessee to recognize assets and liabilities on the balance sheet for leases with lease terms greater than 12 months. ASU 2016-02 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2018, and early adoption is permitted. We are currently evaluating the impact that the standard will have on our consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”). The standard is intended to simplify several areas of accounting for share-based compensation arrangements, including the income tax impact, classification on the statement of cash flows and forfeitures. ASU 2016-09 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016, and early adoption is permitted. We are currently evaluating the impact that the standard will have on our consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). These amendments require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 is effective for SEC filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019 (i.e., January 1, 2020, for calendar year entities). Early application will be permitted for all organizations for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. We are currently evaluating the impact that the standard will have on our consolidated financial statements.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	E Amounts reported in earnings per share reflect earnings available to common stockholders for the period divided by the weighted average number of shares of common stock outstanding during the period, exclusive of unearned ESOP shares and unvested restricted stock shares. Stock options and restricted stock are regarded as potential common stock and are considered in the diluted earnings per share calculations to the extent that they would have a dilutive effect if converted to common stock. Three Months Ended Nine Months Ended 2016 2015 2016 2015 Net income available to common stockholders $ 2,508 $ 2,349 $ 5,243 $ 6,559 Average common shares outstanding 19,460,022 20,501,966 19,813,088 20,803,065 Less: Unearned ESOP shares (670,351 ) (768,327 ) (694,655 ) (792,551 ) Unvested restricted stock shares (940 ) (7,932 ) (3,830 ) (11,425 ) Weighted average common shares outstanding 18,788,731 19,725,707 19,114,603 19,999,089 Add - Net effect of dilutive unvested restricted stock 323 5,595 315 5,605 Diluted weighted average common shares outstanding 18,789,054 19,731,302 19,114,918 20,004,694 Basic earnings per common share $ 0.13 $ 0.12 $ 0.27 $ 0.33 Diluted earnings per common share $ 0.13 $ 0.12 $ 0.27 $ 0.33 Number of antidilutive stock options excluded from the diluted earnings per share calculation 536,459 — 536,459 — Weighted average exercise price of anti-dilutive option shares $ 12.99 $ — $ 12.99 $ —

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	The fair value of securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income are shown below. Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2016 Certificates of deposit $ 76,901 $ — $ — $ 76,901 Equity mutual fund 500 15 — 515 Mortgage-backed securities - residential 15,796 756 — 16,552 Collateralized mortgage obligations - residential 5,917 16 (20 ) 5,913 SBA-guaranteed loan participation certificates 18 — — 18 $ 99,132 $ 787 $ (20 ) $ 99,899 December 31, 2015 Certificates of deposit $ 87,901 $ — $ — $ 87,901 Equity mutual fund 500 7 — 507 Mortgage-backed securities - residential 18,330 880 (30 ) 19,180 Collateralized mortgage obligations - residential 7,111 41 (10 ) 7,142 SBA-guaranteed loan participation certificates 23 — — 23 $ 113,865 $ 928 $ (40 ) $ 114,753 The mortgage-backed securities and collateralized mortgage obligations reflected in the preceding table were issued by U.S. government-sponsored entities or agencies, Freddie Mac, Fannie Mae and Ginnie Mae, and are obligations which the government has affirmed its commitment to support. All securities reflected in the preceding table were classified as available-for-sale at September 30, 2016 and December 31, 2015 . The amortized cost and fair values of securities by contractual maturity are shown below. Securities not due at a single maturity date are shown separately. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2016 Amortized Cost Fair Value Due in one year or less $ 76,901 $ 76,901 Equity mutual fund 500 515 Mortgage-backed securities - residential 15,796 16,552 Collateralized mortgage obligations - residential 5,917 5,913 SBA-guaranteed loan participation certificates 18 18 $ 99,132 $ 99,899 Sales of securities were as follows: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Proceeds $ — $ — $ 46 $ — Gross gains — — 46 — Gross losses — — — — Securities with unrealized losses not recognized in income are as follows: Less than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss September 30, 2016 Collateralized mortgage obligations - residential $ 3,030 $ (12 ) $ 1,095 $ (8 ) $ 4,125 $ (20 ) December 31, 2015 Mortgage-backed securities - residential $ — $ — $ 1,724 $ (30 ) $ 1,724 $ (30 ) Collateralized mortgage obligations - residential — — 1,299 (10 ) 1,299 (10 ) $ — $ — $ 3,023 $ (40 ) $ 3,023 $ (40 ) The Company evaluates marketable investment securities with significant declines in fair value on a quarterly basis to determine whether they should be considered other-than-temporarily impaired under current accounting guidance, which generally provides that if a marketable security is in an unrealized loss position, whether due to general market conditions or industry or issuer-specific factors, the holder of the securities must assess whether the impairment is other-than-temporary. Certain collateralized mortgage obligations that the Company holds in its investment portfolio were in an unrealized loss position at September 30, 2016 , but the unrealized losses were not considered significant under the Company’s impairment testing methodology. In addition, the Company does not intend to sell these securities, and it is likely that the Company will not be required to sell these securities before their anticipated recovery occurs.
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)	The fair value of securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income are shown below. Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value September 30, 2016 Certificates of deposit $ 76,901 $ — $ — $ 76,901 Equity mutual fund 500 15 — 515 Mortgage-backed securities - residential 15,796 756 — 16,552 Collateralized mortgage obligations - residential 5,917 16 (20 ) 5,913 SBA-guaranteed loan participation certificates 18 — — 18 $ 99,132 $ 787 $ (20 ) $ 99,899 December 31, 2015 Certificates of deposit $ 87,901 $ — $ — $ 87,901 Equity mutual fund 500 7 — 507 Mortgage-backed securities - residential 18,330 880 (30 ) 19,180 Collateralized mortgage obligations - residential 7,111 41 (10 ) 7,142 SBA-guaranteed loan participation certificates 23 — — 23 $ 113,865 $ 928 $ (40 ) $ 114,753
Amortized cost and fair values of securities	The amortized cost and fair values of securities by contractual maturity are shown below. Securities not due at a single maturity date are shown separately. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. September 30, 2016 Amortized Cost Fair Value Due in one year or less $ 76,901 $ 76,901 Equity mutual fund 500 515 Mortgage-backed securities - residential 15,796 16,552 Collateralized mortgage obligations - residential 5,917 5,913 SBA-guaranteed loan participation certificates 18 18 $ 99,132 $ 99,899
Securities with unrealized losses	Securities with unrealized losses not recognized in income are as follows: Less than 12 Months 12 Months or More Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss September 30, 2016 Collateralized mortgage obligations - residential $ 3,030 $ (12 ) $ 1,095 $ (8 ) $ 4,125 $ (20 ) December 31, 2015 Mortgage-backed securities - residential $ — $ — $ 1,724 $ (30 ) $ 1,724 $ (30 ) Collateralized mortgage obligations - residential — — 1,299 (10 ) 1,299 (10 ) $ — $ — $ 3,023 $ (40 ) $ 3,023 $ (40 )

Loans Receivable (Tables)

Loans Receivable (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans By Class Modified As Troubled Debt Restructurings With Payment Default [Table Text Block]	The following table presents TDRs for which there was a payment default during the nine months ended September 30, 2016 and 2015 within twelve months following the modification. 2016 2015 Number of loans Recorded investment Number of loans Recorded investment One-to-four family residential real estate 2 $ 87 1 $ 27
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Loans receivable are as follows: September 30, 2016 December 31, 2015 One-to-four family residential real estate $ 142,130 $ 159,501 Multi-family mortgage 505,369 506,026 Nonresidential real estate 186,504 226,735 Construction and land 1,005 1,313 Commercial loans 106,878 79,516 Commercial leases 304,753 265,405 Consumer 1,846 1,831 1,248,485 1,240,327 Net deferred loan origination costs 1,657 1,621 Allowance for loan losses (8,334 ) (9,691 ) Loans, net $ 1,241,808 $ 1,232,257 The following tables present the balance in the allowance for loan losses and the loans receivable by portfolio segment and based on impairment method: Allowance for loan losses Loan Balances Individually evaluated for impairment Collectively evaluated for impairment Total Individually evaluated for impairment Collectively evaluated for impairment Total September 30, 2016 One-to-four family residential real estate $ — $ 1,271 $ 1,271 $ 3,527 $ 138,603 $ 142,130 Multi-family mortgage 13 3,336 3,349 1,112 504,257 505,369 Nonresidential real estate 26 1,981 2,007 714 185,790 186,504 Construction and land — 24 24 — 1,005 1,005 Commercial loans — 769 769 — 106,878 106,878 Commercial leases — 894 894 — 304,753 304,753 Consumer — 20 20 — 1,846 1,846 $ 39 $ 8,295 $ 8,334 $ 5,353 $ 1,243,132 1,248,485 Net deferred loan origination costs 1,657 Allowance for loan losses (8,334 ) Loans, net $ 1,241,808 Allowance for loan losses Loan Balances Individually evaluated for impairment Collectively evaluated for impairment Total Individually evaluated for impairment Collectively evaluated for impairment Total December 31, 2015 One-to-four family residential real estate $ — $ 1,704 $ 1,704 $ 2,672 $ 156,829 $ 159,501 Multi-family mortgage 41 3,569 3,610 2,879 503,147 506,026 Nonresidential real estate 3 2,579 2,582 2,099 224,636 226,735 Construction and land — 43 43 — 1,313 1,313 Commercial loans — 654 654 — 79,516 79,516 Commercial leases — 1,073 1,073 — 265,405 265,405 Consumer — 25 25 — 1,831 1,831 $ 44 $ 9,647 $ 9,691 $ 7,650 $ 1,232,677 1,240,327 Net deferred loan origination costs 1,621 Allowance for loan losses (9,691 ) Loans, net $ 1,232,257 Activity in the allowance for loan losses is as follows: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 8,915 $ 10,810 $ 9,691 $ 11,990 Loans charged off: One-to-four family residential real estate (102 ) (125 ) (509 ) (327 ) Multi-family mortgage — (9 ) (51 ) (189 ) Nonresidential real estate (55 ) (26 ) (1,715 ) (289 ) Commercial loans — — — (98 ) Consumer (6 ) (3 ) (24 ) (11 ) (163 ) (163 ) (2,299 ) (914 ) Recoveries: One-to-four family residential real estate 5 16 92 295 Multi-family mortgage 10 169 156 177 Nonresidential real estate 39 24 200 49 Construction and land — 38 35 44 Commercial loans 45 143 150 606 Commercial leases 7 — 7 1 Consumer 1 — 2 1 107 390 642 1,173 Net recoveries (charge-offs) (56 ) 227 (1,657 ) 259 Provision for (recovery of) loan losses (525 ) (956 ) 300 (2,168 ) Ending balance $ 8,334 $ 10,081 $ 8,334 $ 10,081 The following tables present the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans: Loan Balance Recorded Investment Loans Past Due Over 90 Days, Still Accruing September 30, 2016 One-to-four family residential real estate $ 2,557 $ 2,120 $ — One-to-four family residential real estate – non owner occupied 497 571 — Multi-family mortgage - Illinois 552 508 — Nonresidential real estate 723 717 — $ 4,329 $ 3,916 $ — December 31, 2015 One-to-four family residential real estate $ 2,704 $ 2,263 $ — One-to-four family residential real estate – non owner occupied 92 192 — Multi-family mortgage - Illinois 829 821 — Nonresidential real estate 324 296 — $ 3,949 $ 3,572 $ — Nonaccrual loans and impaired loans are defined differently. Some loans may be included in both categories, and some may only be included in one category. Nonaccrual loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans. The Company’s reserve for uncollected loan interest was $238,000 and $181,000 at September 30, 2016 and December 31, 2015 , respectively. When a loan is on nonaccrual status and the ultimate collectability of the total principal of an impaired loan is in doubt, all payments are applied to principal under the cost recovery method. Alternatively, when a loan is on non-accrual status but there is doubt concerning only the ultimate collectability of interest, contractual interest is credited to interest income only when received, under the cash basis method pursuant to the provisions of FASB ASC 310–10, as applicable. In all cases, the average balances are calculated based on the month–end balances of the financing receivables within the period reported pursuant to the provisions of FASB ASC 310–10, as applicable. The following tables present the aging of the recorded investment of loans at September 30, 2016 by class of loans: 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Loans Not Past Due Total One-to-four family residential real estate loans $ 543 $ 652 $ 1,815 $ 3,010 $ 98,669 $ 101,679 One-to-four family residential real estate loans – non-owner occupied 2 4 571 577 39,881 40,458 Multi-family mortgage - Illinois — — 508 508 298,572 299,080 Multi-family mortgage - Other — — — — 202,686 202,686 Nonresidential real estate — — 717 717 184,432 185,149 Construction — — — — 628 628 Land — — — — 374 374 Commercial loans: Regional commercial banking — — — — 34,452 34,452 Health care — — — — 34,348 34,348 Direct commercial lessor 236 — — 236 38,218 38,454 Commercial leases: Investment rated commercial leases 409 46 — 455 216,115 216,570 Other commercial leases — — — — 89,958 89,958 Consumer — — — — 1,854 1,854 $ 1,190 $ 702 $ 3,611 $ 5,503 $ 1,240,187 $ 1,245,690 The following tables present the aging of the recorded investment of loans at December 31, 2015 by class of loans: 30-59 Days Past Due 60-89 Days Past Due 90 Days or Total Past Due Loans Not Past Due Total One-to-four family residential real estate loans $ 2,000 $ 572 $ 1,997 $ 4,569 $ 109,893 $ 114,462 One-to-four family residential real estate loans – non-owner occupied 299 164 192 655 43,557 44,212 Multi-family mortgage - Illinois 651 283 821 1,755 312,620 314,375 Multi-family mortgage - Other — — — — 188,178 188,178 Nonresidential real estate — — 296 296 223,018 223,314 Construction — — — — 21 21 Land — — — — 1,279 1,279 Commercial loans: Regional commercial banking 4 150 — 154 29,890 30,044 Health care — — — — 31,862 31,862 Direct commercial lessor — — — — 17,873 17,873 Commercial leases: Investment rated commercial leases 50 363 — 413 170,859 171,272 Other commercial leases — — — — 95,800 95,800 Consumer 21 — — 21 1,819 1,840 $ 3,025 $ 1,532 $ 3,306 $ 7,863 $ 1,226,669 $ 1,234,532 The Company evaluates loan extensions or modifications in accordance with FASB ASC 310–40 with respect to the classification of the loan as a Troubled Debt Restructuring ("TDR"). In general, if the Company grants a loan extension or modification to a borrower for other than an insignificant period of time that includes a below–market interest rate, principal forgiveness, payment forbearance or other concession intended to minimize the economic loss to the Company, the loan extension or loan modification is classified as a TDR. In cases where borrowers are granted new terms that provide for a reduction of either interest or principal then due and payable, management measures any impairment on the restructured loan in the same manner as for impaired loans as noted above. The Company had $413,000 of TDRs at September 30, 2016 , compared to $2.7 million at December 31, 2015 . No specific valuation reserves were allocated to those loans at September 30, 2016 and December 31, 2015 . The Company had no outstanding commitments to borrowers whose loans were classified as TDRs at either date. During the first quarter of 2016, six loans totaling $1.5 million were declassified as TDRs as they successfully met the criteria for removal from TDR status. The following table presents loans classified as TDRs: September 30, 2016 December 31, 2015 One-to-four family residential real estate $ 183 $ 1,385 Multi-family mortgage — 1,119 Troubled debt restructured loans – accrual loans 183 2,504 One-to-four family residential real estate 230 174 Troubled debt restructured loans – nonaccrual loans 230 174 Total troubled debt restructured loans $ 413 $ 2,678 During the nine months ended September 30, 2016 and 2015 , the terms of certain loans were modified and classified as TDRs. The modification of the terms of such loans included one or a combination of the following: a reduction of the stated interest rate of the loan; an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk; or a permanent reduction of the recorded investment in the loan. The following tables present TDR activity: Three Months Ended September 30, 2016 2015 Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment One-to-four family residential real estate — $ — $ — 5 $ 338 $ 211 Due to Due to Due to Total For the Three Months Ended September 30, 2016 One-to-four family residential real estate — — — — For the Three Months Ended September 30, 2015 One-to-four family residential real estate — 79 132 211 The TDRs described above had no impact on interest income, resulted in no change to the allowance for loan losses allocated and resulted in $127,000 of charge-offs for the three months ended September 30, 2015 . Nine Months Ended September 30, 2016 2015 Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment One-to-four family residential real estate 1 $ 63 $ 63 6 $ 401 $ 274 Due to Due to Due to Total For the Nine Months Ended September 30, 2016 One-to-four family residential real estate $ — $ 63 $ — $ 63 For the Nine Months Ended September 30, 2015 One-to-four family residential real estate $ — $ 142 $ 132 $ 274 The TDRs described above had no impact on interest income, resulted in no change to the allowance for loan losses allocated and resulted in no charge-offs for the nine months ended September 30, 2016 . The TDRs had no material impact on interest income, resulted in no change to the allowance for loan losses allocated and resulted in $127,000 of charge-offs for the nine months ended September 30, 2015 . The following table presents TDRs for which there was a payment default during the nine months ended September 30, 2016 and 2015 within twelve months following the modification. 2016 2015 Number of loans Recorded investment Number of loans Recorded investment One-to-four family residential real estate 2 $ 87 1 $ 27 A TDR is considered to be in payment default once it is 90 days contractually past due under the modified terms. The TDRs for which there was a payment default resulted in no change to the allowance for loan losses allocated and resulted in no charge-offs during the nine months ended September 30, 2016 . The TDRs for which there was a payment default resulted in no change to the allowance for loan losses allocated and resulted in no charge-offs during the nine months ended September 30, 2015 . There were certain other loan modifications during the three and nine months ended September 30, 2016 and 2015 that did not meet the definition of a TDR. These loans had a total recorded investment of $615,000 and $2.6 million at September 30, 2016 and 2015 , respectively. The modification of these loans involved either a modification of the terms of a loan to borrowers who were not experiencing financial difficulties or a delay in a payment that was considered to be insignificant. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, including current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans based on credit risk. This analysis includes non-homogeneous loans, such as commercial and commercial real estate loans. This analysis is performed on a monthly basis. The Company uses the following definitions for risk ratings: Special Mention. A Special Mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the institution’s credit position at some future date. Special Mention assets are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification. Substandard. Loans categorized as Substandard continue to accrue interest, but exhibit a well-defined weakness or weaknesses that may jeopardize the liquidation of the debt. The loans continue to accrue interest because they are well secured and collection of principal and interest is expected within a reasonable time. The risk rating guidance published by the Office of the Comptroller of the Currency clarifies that a loan with a well-defined weakness does not have to present a probability of default for the loan to be rated Substandard, and that an individual loan’s loss potential does not have to be distinct for the loan to be rated Substandard. Nonaccrual. An asset classified Nonaccrual has all the weaknesses inherent in one classified Substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The loans were placed on nonaccrual status. Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered “Pass” rated loans. As of September 30, 2016 , based on the most recent analysis performed, the risk categories of loans by class of loans are as follows: Pass Special Mention Substandard Nonaccrual Total One-to-four family residential real estate loans $ 99,095 $ — $ 475 $ 2,120 $ 101,690 One-to-four family residential real estate loans – non-owner occupied 39,658 211 — 571 40,440 Multi-family mortgage loans - Illinois 297,485 329 2,119 507 300,440 Multi-family mortgage loans - Other 204,929 — — — 204,929 Nonresidential real estate loans 183,383 — 2,407 714 186,504 Construction loans 625 — — — 625 Land loans 380 — — — 380 Commercial loans: Regional commercial banking 34,254 — 75 — 34,329 Health care 34,290 — — — 34,290 Direct commercial lessor 36,989 1,270 — — 38,259 Commercial leases: Investment rated commercial leases 215,237 — — — 215,237 Other commercial leases 89,332 184 — — 89,516 Consumer 1,846 — — — 1,846 $ 1,237,503 $ 1,994 $ 5,076 $ 3,912 $ 1,248,485 As of December 31, 2015 , the risk categories of loans by class of loans are as follows: Pass Special Mention Substandard Nonaccrual Total One-to-four family residential real estate loans $ 112,449 $ — $ 576 $ 1,936 $ 114,961 One-to-four family residential real estate loans – non-owner occupied 43,858 219 271 192 44,540 Multi-family mortgage loans - Illinois 312,329 344 4,656 828 318,157 Multi-family mortgage loans - Other 187,358 — 511 — 187,869 Nonresidential real estate loans 219,859 1,600 4,981 295 226,735 Construction loans 21 — — — 21 Land loans 450 — 842 — 1,292 Commercial loans: Regional commercial banking 29,377 — 614 — 29,991 Health care 31,809 — — — 31,809 Direct commercial lessor 17,716 — — — 17,716 Commercial leases: Investment rated commercial leases 170,100 — — — 170,100 Other commercial leases 95,305 — — — 95,305 Consumer 1,831 — — — 1,831 $ 1,222,462 $ 2,163 $ 12,451 $ 3,251 $ 1,240,327
Loans receivable	Loans receivable are as follows: September 30, 2016 December 31, 2015 One-to-four family residential real estate $ 142,130 $ 159,501 Multi-family mortgage 505,369 506,026 Nonresidential real estate 186,504 226,735 Construction and land 1,005 1,313 Commercial loans 106,878 79,516 Commercial leases 304,753 265,405 Consumer 1,846 1,831 1,248,485 1,240,327 Net deferred loan origination costs 1,657 1,621 Allowance for loan losses (8,334 ) (9,691 ) Loans, net $ 1,241,808 $ 1,232,257
Loans Receivable Based On Impairment Method [Table Text Block]	The following tables present the balance in the allowance for loan losses and the loans receivable by portfolio segment and based on impairment method: Allowance for loan losses Loan Balances Individually evaluated for impairment Collectively evaluated for impairment Total Individually evaluated for impairment Collectively evaluated for impairment Total September 30, 2016 One-to-four family residential real estate $ — $ 1,271 $ 1,271 $ 3,527 $ 138,603 $ 142,130 Multi-family mortgage 13 3,336 3,349 1,112 504,257 505,369 Nonresidential real estate 26 1,981 2,007 714 185,790 186,504 Construction and land — 24 24 — 1,005 1,005 Commercial loans — 769 769 — 106,878 106,878 Commercial leases — 894 894 — 304,753 304,753 Consumer — 20 20 — 1,846 1,846 $ 39 $ 8,295 $ 8,334 $ 5,353 $ 1,243,132 1,248,485 Net deferred loan origination costs 1,657 Allowance for loan losses (8,334 ) Loans, net $ 1,241,808
Allowance for loan losses	ctivity in the allowance for loan losses is as follows: Three Months Ended Nine Months Ended 2016 2015 2016 2015 Beginning balance $ 8,915 $ 10,810 $ 9,691 $ 11,990 Loans charged off: One-to-four family residential real estate (102 ) (125 ) (509 ) (327 ) Multi-family mortgage — (9 ) (51 ) (189 ) Nonresidential real estate (55 ) (26 ) (1,715 ) (289 ) Commercial loans — — — (98 ) Consumer (6 ) (3 ) (24 ) (11 ) (163 ) (163 ) (2,299 ) (914 ) Recoveries: One-to-four family residential real estate 5 16 92 295 Multi-family mortgage 10 169 156 177 Nonresidential real estate 39 24 200 49 Construction and land — 38 35 44 Commercial loans 45 143 150 606 Commercial leases 7 — 7 1 Consumer 1 — 2 1 107 390 642 1,173 Net recoveries (charge-offs) (56 ) 227 (1,657 ) 259 Provision for (recovery of) loan losses (525 ) (956 ) 300 (2,168 ) Ending balance $ 8,334 $ 10,081 $ 8,334 $ 10,081
Schedule of Financing Receivables, Non Accrual Status	The following tables present the recorded investment in nonaccrual loans and loans past due over 90 days still on accrual by class of loans: Loan Balance Recorded Investment Loans Past Due Over 90 Days, Still Accruing September 30, 2016 One-to-four family residential real estate $ 2,557 $ 2,120 $ — One-to-four family residential real estate – non owner occupied 497 571 — Multi-family mortgage - Illinois 552 508 — Nonresidential real estate 723 717 — $ 4,329 $ 3,916 $ — December 31, 2015 One-to-four family residential real estate $ 2,704 $ 2,263 $ — One-to-four family residential real estate – non owner occupied 92 192 — Multi-family mortgage - Illinois 829 821 — Nonresidential real estate 324 296 — $ 3,949 $ 3,572 $ —
Past Due Financing Receivables	The following tables present the aging of the recorded investment of loans at September 30, 2016 by class of loans: 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Loans Not Past Due Total One-to-four family residential real estate loans $ 543 $ 652 $ 1,815 $ 3,010 $ 98,669 $ 101,679 One-to-four family residential real estate loans – non-owner occupied 2 4 571 577 39,881 40,458 Multi-family mortgage - Illinois — — 508 508 298,572 299,080 Multi-family mortgage - Other — — — — 202,686 202,686 Nonresidential real estate — — 717 717 184,432 185,149 Construction — — — — 628 628 Land — — — — 374 374 Commercial loans: Regional commercial banking — — — — 34,452 34,452 Health care — — — — 34,348 34,348 Direct commercial lessor 236 — — 236 38,218 38,454 Commercial leases: Investment rated commercial leases 409 46 — 455 216,115 216,570 Other commercial leases — — — — 89,958 89,958 Consumer — — — — 1,854 1,854 $ 1,190 $ 702 $ 3,611 $ 5,503 $ 1,240,187 $ 1,245,690
Troubled Debt Restructurings on Financing Receivables	The following table presents loans classified as TDRs: September 30, 2016 December 31, 2015 One-to-four family residential real estate $ 183 $ 1,385 Multi-family mortgage — 1,119 Troubled debt restructured loans – accrual loans 183 2,504 One-to-four family residential real estate 230 174 Troubled debt restructured loans – nonaccrual loans 230 174 Total troubled debt restructured loans $ 413 $ 2,678
Financing Receivable Credit Quality Indicators	As of September 30, 2016 , based on the most recent analysis performed, the risk categories of loans by class of loans are as follows: Pass Special Mention Substandard Nonaccrual Total One-to-four family residential real estate loans $ 99,095 $ — $ 475 $ 2,120 $ 101,690 One-to-four family residential real estate loans – non-owner occupied 39,658 211 — 571 40,440 Multi-family mortgage loans - Illinois 297,485 329 2,119 507 300,440 Multi-family mortgage loans - Other 204,929 — — — 204,929 Nonresidential real estate loans 183,383 — 2,407 714 186,504 Construction loans 625 — — — 625 Land loans 380 — — — 380 Commercial loans: Regional commercial banking 34,254 — 75 — 34,329 Health care 34,290 — — — 34,290 Direct commercial lessor 36,989 1,270 — — 38,259 Commercial leases: Investment rated commercial leases 215,237 — — — 215,237 Other commercial leases 89,332 184 — — 89,516 Consumer 1,846 — — — 1,846 $ 1,237,503 $ 1,994 $ 5,076 $ 3,912 $ 1,248,485
Loans By Class Modified As Troubled Debt Restructuring On Financing Receivables [Table Text Block]	The following tables present TDR activity: Three Months Ended September 30, 2016 2015 Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment One-to-four family residential real estate — $ — $ — 5 $ 338 $ 211 Due to Due to Due to Total For the Three Months Ended September 30, 2016 One-to-four family residential real estate — — — — For the Three Months Ended September 30, 2015 One-to-four family residential real estate — 79 132 211 The TDRs described above had no impact on interest income, resulted in no change to the allowance for loan losses allocated and resulted in $127,000 of charge-offs for the three months ended September 30, 2015 . Nine Months Ended September 30, 2016 2015 Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment Number of loans Pre- Modification outstanding recorded investment Post- Modification outstanding recorded investment One-to-four family residential real estate 1 $ 63 $ 63 6 $ 401 $ 274

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of Company's financial instruments measured at fair values	The following table sets forth the Company’s financial assets that were accounted for at fair value and are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Fair Value Measurements Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value September 30, 2016 Securities: Certificates of deposit $ — $ 76,901 $ — $ 76,901 Equity mutual fund 515 — — 515 Mortgage-backed securities – residential — 16,552 — 16,552 Collateralized mortgage obligations – residential — 5,913 — 5,913 SBA-guaranteed loan participation certificates — 18 — 18 $ 515 $ 99,384 $ — $ 99,899 December 31, 2015 Securities: Certificates of deposit $ — $ 87,901 $ — $ 87,901 Equity mutual fund 507 — — 507 Mortgage-backed securities - residential — 19,180 — 19,180 Collateralized mortgage obligations – residential — 7,142 — 7,142 SBA-guaranteed loan participation certificates — 23 — 23 $ 507 $ 114,246 $ — $ 114,753
Schedule of Company's financial instruments measured on non recurring at fair values	The following table sets forth the Company’s assets that were measured at fair value on a non-recurring basis: Fair Value Measurement Using Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value September 30, 2016 Impaired loans: Multi-family mortgage $ — $ — $ 112 $ 112 Nonresidential real estate — — 234 234 $ — $ — $ 346 $ 346 Other real estate owned: One-to-four family residential real estate $ — $ — $ 2,162 $ 2,162 Nonresidential real estate — — 674 674 $ — $ — $ 2,836 $ 2,836 Mortgage servicing rights $ — $ 240 $ — $ 240 December 31, 2015 Impaired loans: Multi-family mortgage $ — $ — $ 477 $ 477 Nonresidential real estate — — 36 36 $ — $ — $ 513 $ 513 Other real estate owned: One-to-four family residential real estate $ — $ — $ 42 $ 42 Multi-family mortgage — — 354 354 Nonresidential real estate — — 474 474 Land — — 794 794 $ — $ — $ 1,664 $ 1,664 Mortgage servicing rights $ — $ 281 $ — $ 281
Schedule of fair value quantitative information	The following table presents quantitative information, based on certain empirical data with respect to Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at September 30, 2016 : Fair Value Valuation Technique(s) Significant Unobservable Input(s) Range (Weighted Average) Impaired loans: Multi-family mortgage loans $ 112 Sales comparison Comparison between sales and income approaches 85.7% Income approach Cap Rate 10.0% Nonresidential real estate loans 234 Sales comparison Comparison between sales and income approaches -10.2% Income approach Cap Rate 8.5% Impaired loans $ 346 Other real estate owned: One-to-four family residential real estate $ 2,162 Sales comparison Discount applied to valuation 7.5% to 24.2% (17%) Nonresidential real estate loans 674 Sales comparison Comparison between sales and income approaches -3.2% to 54.9% Other real estate owned $ 2,836
Carrying amount and estimated fair value of financial instruments	The carrying amount and estimated fair value of financial instruments are as follows: Fair Value Measurements at September 30, 2016 Using: Carrying Amount Level 1 Level 2 Level 3 Total Financial assets Cash and cash equivalents $ 100,530 $ 9,499 $ 91,031 $ — $ 100,530 Securities 99,899 515 99,384 — 99,899 Loans receivable, net of allowance for loan losses 1,241,808 — 1,262,883 346 1,263,229 FHLBC stock 6,257 — — — N/A Accrued interest receivable 4,156 — 4,156 — 4,156 Financial liabilities Noninterest-bearing demand deposits $ 234,652 $ — $ 234,652 $ — $ 234,652 Savings deposits 155,199 — 155,199 — 155,199 NOW and money market accounts 584,100 — 584,100 — 584,100 Certificates of deposit 342,744 — 342,797 — 342,797 Borrowings 1,406 — 1,407 — 1,407 Accrued interest payable 84 — 84 — 84

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Sep. 30, 2016
Other Real Estate [Abstract]
Schedule of Real Estate Properties [Table Text Block]	September 30, 2016 December 31, 2015 Balance Valuation Allowance Net OREO Balance Balance Valuation Allowance Net OREO Balance One–to–four family residential $ 2,437 $ (156 ) $ 2,281 $ 2,684 $ (63 ) $ 2,621 Multi-family mortgage 430 (37 ) 393 1,025 (74 ) 951 Nonresidential real estate 1,022 (242 ) 780 1,986 (239 ) 1,747 Land 1,101 (174 ) 927 2,358 (666 ) 1,692 $ 4,990 $ (609 ) $ 4,381 $ 8,053 $ (1,042 ) $ 7,011
Real Estate Owned, rollforward [Table Text Block]	September 30, 2016 December 31, 2015 Balance Valuation Allowance Net OREO Balance Balance Valuation Allowance Net OREO Balance One–to–four family residential $ 2,437 $ (156 ) $ 2,281 $ 2,684 $ (63 ) $ 2,621 Multi-family mortgage 430 (37 ) 393 1,025 (74 ) 951 Nonresidential real estate 1,022 (242 ) 780 1,986 (239 ) 1,747 Land 1,101 (174 ) 927 2,358 (666 ) 1,692 $ 4,990 $ (609 ) $ 4,381 $ 8,053 $ (1,042 ) $ 7,011 The following represents the roll forward of OREO and the composition of OREO properties: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Beginning balance $ 5,373 $ 5,539 $ 7,011 $ 6,358 New foreclosed properties 94 147 215 1,314 Valuation adjustments (115 ) (231 ) (244 ) (467 ) Sales (971 ) (646 ) (2,601 ) (2,396 ) Ending balance $ 4,381 $ 4,809 $ 4,381 $ 4,809
OREO valuation allowance, rollforward [Table Text Block]	Activity in the valuation allowance is as follows: For the Three Months Ended September 30, For the Nine Months Ended September 30, 2016 2015 2016 2015 Beginning balance $ 664 $ 1,102 $ 1,042 $ 896 Additions charged to expense 115 231 244 467 Reductions from sales of other real estate owned (170 ) (64 ) (677 ) (94 ) Ending balance $ 609 $ 1,269 $ 609 $ 1,269

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share, Basic and Diluted [Abstract]
Net income available to common stockholders	$ 2,508,000	$ 2,349,000	$ 5,243,000	$ 6,559,000
Average common shares outstanding (shares)	19,460,022	20,501,966	19,813,088	20,803,065
Less:
Unvested restricted stock shares (shares)	940	7,932	3,830	11,425
Weighted average common shares outstanding (shares)	18,788,731	19,725,707	19,114,603	19,999,089
Unearned Employee Stock Ownership Plan shares	(670,351)	(768,327)	(694,655)	(792,551)
Add - Net effect of dilutive stock options and unvested restricted stock	323	5,595	315	5,605
Weighted average diluted common shares outstanding (shares)	18,789,054	19,731,302	19,114,918	20,004,694
Basic earnings per common share (usd per share)	$ 0.13	$ 0.12	$ 0.27	$ 0.33
Diluted earnings per common share (usd per share)	$ 0.13	$ 0.12	$ 0.27	$ 0.33
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
weighted average exercise price of antidilutive stock options	$ 12.99		$ 12.99

Securities - Fair Value of Secu

Securities - Fair Value of Securites (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	$ 99,132	$ 113,865
Available for sale securities, accumulated gross unrealized gain before tax	787	928
Available for sale securities, accumulated gross unrealized loss before tax	(20)	(40)
Total Fair value	99,899	114,753
Certificates of deposit [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	76,901	87,901
Available for sale securities, accumulated gross unrealized gain before tax	0	0
Available for sale securities, accumulated gross unrealized loss before tax	0	0
Total Fair value	76,901	87,901
Equity mutual fund [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	500	500
Available for sale securities, accumulated gross unrealized gain before tax	15	7
Available for sale securities, accumulated gross unrealized loss before tax	0	0
Total Fair value	515	507
Mortgage - backed securities - residential [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	15,796	18,330
Available for sale securities, accumulated gross unrealized gain before tax	756	880
Available for sale securities, accumulated gross unrealized loss before tax	0	(30)
Total Fair value	16,552	19,180
Collateralized mortgage obligations - residential [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	5,917	7,111
Available for sale securities, accumulated gross unrealized gain before tax	16	41
Available for sale securities, accumulated gross unrealized loss before tax	(20)	(10)
Total Fair value	5,913	7,142
SBA-guaranteed loan participation certificates [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	18	23
Available for sale securities, accumulated gross unrealized gain before tax	0	0
Available for sale securities, accumulated gross unrealized loss before tax	0	0
Total Fair value	$ 18	$ 23

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Amortized cost and fair values of securities
Due in one year or less, amortized cost	$ 76,901
Due in one year or less, fair value	76,901
Total amortized cost	99,132	$ 113,865
Total Fair value	99,899	114,753
Equity mutual fund [Member]
Amortized cost and fair values of securities
Total amortized cost	500	500
Total Fair value	515	507
Mortgage - backed securities - residential [Member]
Amortized cost and fair values of securities
Total amortized cost	15,796	18,330
Total Fair value	16,552	19,180
Collateralized mortgage obligations - residential [Member]
Amortized cost and fair values of securities
Total amortized cost	5,917	7,111
Total Fair value	5,913	7,142
SBA-guaranteed loan participation certificates [Member]
Amortized cost and fair values of securities
Total amortized cost	18	23
Total Fair value	$ 18	$ 23

Securities - Proceeds and Gross

Securities - Proceeds and Gross Gains (Losses) From Sale of Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Proceeds and Gross Gains (Losses) from Sale of Securities [Abstract]
Proceeds from Sale of Available-for-sale Securities, Equity			$ 46
Gain on Sale of Securities, Net	$ 0	$ 0	46	$ 0
Proceeds from Sale of Available-for-sale Securities			$ 46	$ 0

Securities - Unrealized Losses

Securities - Unrealized Losses (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Amortized cost and fair values of securities
Less than 12 Months, Fair Value			$ 0
12 Months or More, Fair Value			3,023,000
Fair Value, Total			3,023,000
Unrealized loss of securities
Less than 12 Months, Unrealized Loss		$ 0
12 Months or More, Unrealized Loss		(40,000)
Unrealized Loss, Total		(40,000)
Mortgage Backed Securities Residential [Member]
Amortized cost and fair values of securities
Less than 12 Months, Fair Value			0
12 Months or More, Fair Value			1,724,000
Fair Value, Total			1,724,000
Unrealized loss of securities
Less than 12 Months, Unrealized Loss		0
12 Months or More, Unrealized Loss		(30,000)
Unrealized Loss, Total		(30,000)
Collateralized mortgage obligations - residential [Member]
Amortized cost and fair values of securities
Less than 12 Months, Fair Value	$ 3,030,000		0
12 Months or More, Fair Value	1,095,000		1,299,000
Fair Value, Total	4,125,000		$ 1,299,000
Unrealized loss of securities
Less than 12 Months, Unrealized Loss	(12,000)	0
12 Months or More, Unrealized Loss	(8,000)	(10,000)
Unrealized Loss, Total	$ (20,000)	$ (10,000)

Securities - Narrative (Details

Securities - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Proceeds and Gross Gains (Losses) from Sale of Securities [Abstract]
Proceeds from Sale of Available-for-sale Securities	$ 46	$ 0

Loans Receivable (Details)

Loans Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Loans receivable
Total loans	$ 1,248,485		$ 1,240,327
Net deferred loan origination costs	1,657		1,621
Allowance for loan losses	(8,334)	$ (8,915)	(9,691)	$ (10,081)	$ (10,810)	$ (11,990)
Loans, net	1,241,808		1,232,257
One-to-four family residential real estate loans [Member]
Loans receivable
Total loans	142,130		159,501
Allowance for loan losses	(1,271)		(1,704)
Multi-family mortgage loans [Member]
Loans receivable
Total loans	505,369		506,026
Allowance for loan losses	(3,349)		(3,610)
Nonresidential real estate loans [Member]
Loans receivable
Total loans	186,504		226,735
Allowance for loan losses	(2,007)		(2,582)
Construction and land loans [Member]
Loans receivable
Total loans	1,005		1,313
Allowance for loan losses	(24)		(43)
Commercial loans [Member]
Loans receivable
Total loans	106,878		79,516
Allowance for loan losses	(769)		(654)
Commercial leases [Member]
Loans receivable
Total loans	304,753		265,405
Allowance for loan losses	(894)		(1,073)
Consumer loans [Member]
Loans receivable
Total loans	1,846		1,831
Allowance for loan losses	$ (20)		$ (25)

Loans Receivable - Loan Origina

Loans Receivable - Loan Origination and Risk Management (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	$ 1,248,485	$ 1,240,327
Multi-family mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	505,369	506,026
Nonresidential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	186,504	226,735
Commercial leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	$ 304,753	$ 265,405

Loans Receivable - Allowance fo

Loans Receivable - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Allowance for loan losses and the loans receivable by portfolio segment
Net deferred loan origination costs	$ 1,657	$ 1,621
Loans, net	$ 1,241,808	$ 1,232,257

Loans Receivable - Activity in

Loans Receivable - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 8,915	$ 10,810	$ 9,691	$ 11,990
Loans charged off	163	163	2,299	914
Recoveries	107	390	642	1,173
Net charge-off	56	(227)	1,657	(259)
Provision for (recovery of) loan losses	(525)	(956)	300	(2,168)
Ending balance	8,334	10,081	8,334	10,081
One-to-four family residential real estate loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			1,704
Loans charged off	(102)	(125)	(509)	(327)
Recoveries	5	16	92	295
Ending balance	1,271		1,271
Multi-family mortgage loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			3,610
Loans charged off	0	(9)	(51)	(189)
Recoveries	10	169	156	177
Ending balance	3,349		3,349
Nonresidential real estate loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			2,582
Loans charged off	(55)	(26)	(1,715)	(289)
Recoveries	39	24	200	49
Ending balance	2,007		2,007
Construction and land loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			43
Recoveries	0	38	35	44
Ending balance	24		24
Commercial loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			654
Loans charged off	0	0	0	(98)
Recoveries	45	143	150	606
Ending balance	769		769
Commercial leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			1,073
Recoveries	7	0
Ending balance	894		894
Consumer loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			25
Loans charged off	(6)	(3)	(24)	(11)
Recoveries	1	$ 0	2	$ 1
Ending balance	$ 20		$ 20

Loans Receivable - Loans Indivi

Loans Receivable - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 1,248,485	$ 1,248,485	$ 1,240,327
Loans individually evaluated for impairment by class loans
Loan Balance	5,504	5,504	7,666
Recorded Investment	4,965	4,965	7,051
Partial Charge-off	748	748	639
Average Investment in Impaired Loans	4,580	5,432	7,920
Interest Income Recognized	8	61	238
Loan Balance (With an allowance recorded)	435	435	580
Recorded Investment (With an allowance recorded)	385	385	557
Partial Charge-offs (With an allowance recorded)	72	72	27
Allowance for loan losses (With an allowance recorded)	39	39	44
Average Investment in Impaired Loans (With an allowance recorded)	663	638	2,620
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	0	0
Impaired Loan, Total	5,939	5,939	8,246
Recorded Investment, Total	5,350	5,350	7,608
Partial Charge-offs, Total	820	820	666
Average Investment in Impaired Loans, Total	5,243	6,070	10,540
Interest Income Recognized, Total	8	61	238
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8,295	8,295	9,647
Net deferred loan origination costs	1,657	1,657	1,621
Loans and Leases Receivable, Allowance	8,334	8,334	9,691	$ 8,915	$ 10,081	$ 10,810	$ 11,990
Financing Receivable, Individually Evaluated for Impairment	5,353	5,353	7,650
Financing Receivable, Collectively Evaluated for Impairment	1,243,132	1,243,132	1,232,677
Loans, net	1,241,808	1,241,808	1,232,257
One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	142,130	142,130	159,501
Loans individually evaluated for impairment by class loans
Loan Balance	3,776	3,776	3,203
Recorded Investment	3,160	3,160	2,637
Partial Charge-off	695	695	637
Average Investment in Impaired Loans	2,890	2,755	2,708
Interest Income Recognized	8	26	24
Allowance for loan losses (With an allowance recorded)	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,271	1,271	1,704
Loans and Leases Receivable, Allowance	1,271	1,271	1,704
Financing Receivable, Individually Evaluated for Impairment	3,527	3,527	2,672
Financing Receivable, Collectively Evaluated for Impairment	138,603	138,603	156,829
One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	40,440	40,440	44,540
Loans individually evaluated for impairment by class loans
Loan Balance	283	283	23
Recorded Investment	357	357	21
Partial Charge-off	53	53	2
Average Investment in Impaired Loans	239	159	859
Interest Income Recognized	0	0	0
Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	505,369	505,369	506,026
Loans individually evaluated for impairment by class loans
Loan Balance	984	984	1,863
Recorded Investment	991	991	1,837
Partial Charge-off	0	0	0
Average Investment in Impaired Loans	994	1,152	1,962
Interest Income Recognized	0	31	78
Loan Balance (With an allowance recorded)	173	173	518
Recorded Investment (With an allowance recorded)	125	125	518
Partial Charge-offs (With an allowance recorded)	51	51	0
Allowance for loan losses (With an allowance recorded)	13	13	41
Average Investment in Impaired Loans (With an allowance recorded)	384	503	1,181
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,336	3,336	3,569
Loans and Leases Receivable, Allowance	3,349	3,349	3,610
Financing Receivable, Individually Evaluated for Impairment	1,112	1,112	2,879
Financing Receivable, Collectively Evaluated for Impairment	504,257	504,257	503,147
Multi Family Mortgage Loans without wholesale [Member] [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	300,440	300,440	318,157
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	13	13
Wholesale commercial lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	204,929	204,929	187,869
Loans individually evaluated for impairment by class loans
Loan Balance			511
Recorded Investment			507
Partial Charge-off			0
Average Investment in Impaired Loans			514
Interest Income Recognized			34
Nonresidential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	186,504	186,504	226,735
Loans individually evaluated for impairment by class loans
Loan Balance	461	461	2,066
Recorded Investment	457	457	2,049
Partial Charge-off	0	0	0
Average Investment in Impaired Loans	457	1,366	1,877
Interest Income Recognized	0	4	102
Loan Balance (With an allowance recorded)	262	262	62
Recorded Investment (With an allowance recorded)	260	260	39
Partial Charge-offs (With an allowance recorded)	21	21	27
Allowance for loan losses (With an allowance recorded)	26	26	3
Average Investment in Impaired Loans (With an allowance recorded)	279	135	1,439
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,981	1,981	2,579
Loans and Leases Receivable, Allowance	2,007	2,007	2,582
Financing Receivable, Individually Evaluated for Impairment	714	714	2,099
Financing Receivable, Collectively Evaluated for Impairment	185,790	185,790	224,636
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	625	625	21
Land loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	380	380	1,292
Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	34,329	34,329	29,991
Commercial loans - other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	89,516	89,516	95,305
Consumer loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,846	1,846	1,831
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	20	20	25
Loans and Leases Receivable, Allowance	20	20	25
Financing Receivable, Individually Evaluated for Impairment	0	0	0
Financing Receivable, Collectively Evaluated for Impairment	1,846	1,846	1,831
Construction And Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,005	1,005	1,313
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	24	24	43
Loans and Leases Receivable, Allowance	24	24	43
Financing Receivable, Individually Evaluated for Impairment	0	0	0
Financing Receivable, Collectively Evaluated for Impairment	1,005	1,005	1,313
Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	106,878	106,878	79,516
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	769	769	654
Loans and Leases Receivable, Allowance	769	769	654
Financing Receivable, Individually Evaluated for Impairment	0	0	0
Financing Receivable, Collectively Evaluated for Impairment	106,878	106,878	79,516
Finance Leases Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	304,753	304,753	265,405
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	894	894	1,073
Loans and Leases Receivable, Allowance	894	894	1,073
Financing Receivable, Individually Evaluated for Impairment	0	0	0
Financing Receivable, Collectively Evaluated for Impairment	304,753	304,753	265,405
One to Four Family Residential Real Estate Loans-Owner occupied [Member] [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 101,690	$ 101,690	$ 114,961

Loans Receivable - Nonaccrual L

Loans Receivable - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Reserve For Uncollected Loan Interest	$ 200	$ 200
Unpaid Principal Balance	4,329	3,949
Recorded Investment	3,916	3,572
Loans Past Due Over 90 Days, still accruing	0	0
One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	2,557	2,704
Recorded Investment	2,120	2,263
Loans Past Due Over 90 Days, still accruing	0	0
One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	497	92
Recorded Investment	571	192
Loans Past Due Over 90 Days, still accruing	0	0
Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	552	829
Recorded Investment	508	821
Loans Past Due Over 90 Days, still accruing	0	0
Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance		324
Loans Past Due Over 90 Days, still accruing		0
Nonresidential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	723
Recorded Investment	717	$ 296
Loans Past Due Over 90 Days, still accruing	$ 0

Loans Receivable - Past Due Loa

Loans Receivable - Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	$ 5,503	$ 7,863
Recorded Investment, Loans Not Past Due	1,240,187	1,226,669
Recorded investment, total	1,245,690	1,234,532
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		21
Recorded Investment, Loans Not Past Due	1,854	1,819
Recorded investment, total	1,854	1,840
Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	455	413
Recorded Investment, Loans Not Past Due	216,115	170,859
Recorded investment, total	216,570	171,272
Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Recorded Investment, Loans Not Past Due	89,958	95,800
Recorded investment, total	89,958	95,800
Commercial Loans Health Care [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Loans Not Past Due	34,348	31,862
Recorded investment, total	34,348	31,862
Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	236	0
Recorded Investment, Loans Not Past Due	38,218	17,873
Recorded investment, total	38,454	17,873
Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	154
Recorded Investment, Loans Not Past Due	34,452	29,890
Recorded investment, total	34,452	30,044
Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Recorded Investment, Loans Not Past Due	374	1,279
Recorded investment, total	374	1,279
Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Recorded Investment, Loans Not Past Due	628	21
Recorded investment, total	628	21
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	717	296
Recorded Investment, Loans Not Past Due	184,432	223,018
Recorded investment, total	185,149	223,314
Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Recorded Investment, Loans Not Past Due	202,686	188,178
Recorded investment, total	202,686	188,178
Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	508	1,755
Recorded Investment, Loans Not Past Due	298,572	312,620
Recorded investment, total	299,080	314,375
One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	577	655
Recorded Investment, Loans Not Past Due	39,881	43,557
Recorded investment, total	40,458	44,212
One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	3,010	4,569
Recorded Investment, Loans Not Past Due	98,669	109,893
Recorded investment, total	101,679	114,462
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	1,190	3,025
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		21
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	409	50
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	236	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	4
Financing Receivables, 30 to 59 Days Past Due [Member] | Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	651
Financing Receivables, 30 to 59 Days Past Due [Member] | One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	2	299
Financing Receivables, 30 to 59 Days Past Due [Member] | One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	543	2,000
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	702	1,532
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		363
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loans Health Care [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	46
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	150
Financing Receivables, 60 to 89 Days Past Due [Member] | Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	283
Financing Receivables, 60 to 89 Days Past Due [Member] | One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	4	164
Financing Receivables, 60 to 89 Days Past Due [Member] | One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	652	572
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	3,611	3,306
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loans Health Care [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Land Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	717	296
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	508	821
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	571	192
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	$ 1,815	$ 1,997

Loans Receivable - Troubled Deb

Loans Receivable - Troubled Debt Restructuring (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)loan	Dec. 31, 2015USD ($)
Financing Receivable, Modifications [Line Items]
Outstanding Commitments To Borrowers Loans Classified As Troubled Debt Restructurings			$ 0		$ 0
Troubled Debt Restructurings
Financing receivable modifications	$ 413,000		413,000		2,678,000
Troubled Debt Restructurings Value Of Decreased Interest Income			0	$ 0
Financing Receivable, Modifications, Increase In Allowance For Loan And Leases Losses			0	0
Troubled Debt Restructuring Charge Off			$ 0	$ 127,000
Number Of Loans Default Subsequent Modification | loan			2	1
Loans Removed from TDR Status			$ 1,500,000
Accrual Loans [Member]
Troubled Debt Restructurings
Financing receivable modifications	183,000		183,000		2,504,000
Non Accrual Loans [Member]
Troubled Debt Restructurings
Financing receivable modifications	230,000		230,000		174,000
One-to-four family residential real estate loans - non-owner occupied loans [Member] | Accrual Loans [Member]
Troubled Debt Restructurings
Financing receivable modifications	183,000		183,000		1,385,000
One-to-four family residential real estate loans - non-owner occupied loans [Member] | Non Accrual Loans [Member]
Troubled Debt Restructurings
Financing receivable modifications	230,000		230,000		174,000
Multi-family mortgage loans [Member] | Accrual Loans [Member]
Troubled Debt Restructurings
Financing receivable modifications	0		0		1,119,000
One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Due To Extension Of Maturity Date	0	$ 79,000	63,000	$ 142,000
Allowance for Loan and Lease Losses [Member]
Troubled Debt Restructurings
Valuation Allowances and Reserves, Balance	$ 0		$ 0		$ 0

Loans Receivable - Modified Tro

Loans Receivable - Modified Troubled Debt Restructuring (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)loan	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Increase In Allowance For Loan And Leases Losses			$ 0	$ 0
Troubled Debt Restructurings Value Of Decreased Interest Income			0	0
Loans modified			615,000	2,600,000
Loans by class modified as TDRs
Financing Receivable, Modifications, Increase In Allowance For Loan And Leases Losses			0	0
Troubled Debt Restructuring Charge Off			$ 0	$ 127,000
One-to-four family residential real estate loans [Member]
Loans by class modified as TDRs
Number of Loans | loan		5	1	6
Pre-Modification outstanding recorded investment		$ 338,000	$ 63,000	$ 401,000
Post-Modification outstanding recorded investment		211,000	63,000	274,000
Due to reduction in interest rate			0	0
Due to extension of maturity date	$ 0	79,000	63,000	142,000
Due to permanent reduction in recorded investment		132,000	0	132,000
Total	$ 0	$ 211,000	$ 63,000	$ 274,000

Loans Receivable - Troubled D37

Loans Receivable - Troubled Debt Restructuring - Payment Defaults (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2015USD ($)loan	Sep. 30, 2016USD ($)loan	Sep. 30, 2015USD ($)loan
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Increase In Allowance For Loan And Leases Losses		$ 0	$ 0
Financing Receivable, Modifications, Increase In Allowance For Loan And Leases Losses		$ 0	$ 0
Loans by class modified as TDRs with payment default
Number of loans | loan		2	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment		$ 87,000	$ 27,000
One-to-four family residential real estate loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Pre Modification Recorded Investment	$ 338,000	63,000	401,000
Loans by class modified as TDRs with payment default
Financing Receivable Post Modification Recorded Investment	$ 211,000	$ 63,000	$ 274,000
Number Of Loans | loan	5	1	6

Loans Receivable - Credit Quali

Loans Receivable - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 5,503	$ 7,863
Financing Receivable Credit Quality Indicators
Total loans	1,248,485	1,240,327
One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	3,010	4,569
Financing Receivable Credit Quality Indicators
Total loans	142,130	159,501
One to Four Family Residential Real Estate Loans-Owner occupied [Member] [Member]
Financing Receivable Credit Quality Indicators
Total loans	101,690	114,961
One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	577	655
Financing Receivable Credit Quality Indicators
Total loans	40,440	44,540
Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	508	1,755
Financing Receivable Credit Quality Indicators
Total loans	505,369	506,026
Multi Family Mortgage Loans without wholesale [Member] [Member]
Financing Receivable Credit Quality Indicators
Total loans	300,440	318,157
Wholesale commercial lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable Credit Quality Indicators
Total loans	204,929	187,869
Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	186,504	226,735
Construction loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable Credit Quality Indicators
Total loans	625	21
Land loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable Credit Quality Indicators
Total loans	380	1,292
Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	154
Financing Receivable Credit Quality Indicators
Total loans	34,329	29,991
Commercial Loans - Municipal loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	236	0
Financing Receivable Credit Quality Indicators
Total loans	38,259	17,716
Commercial Loans - Warehouse Lines [Member]
Financing Receivable Credit Quality Indicators
Total loans
Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	34,290	31,809
Commercial loans - other [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable Credit Quality Indicators
Total loans	89,516	95,305
Commercial Leases - Investment Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	455	413
Financing Receivable Credit Quality Indicators
Total loans	215,237	170,100
Consumer loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0
Financing Receivable Credit Quality Indicators
Total loans	1,846	1,831
Nonaccrual [Member]
Financing Receivable Credit Quality Indicators
Total loans	3,912	3,251
Nonaccrual [Member] | One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	2,120	1,936
Nonaccrual [Member] | One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	571	192
Nonaccrual [Member] | Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	507	828
Nonaccrual [Member] | Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] | Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	714	295
Nonaccrual [Member] | Construction loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] | Land loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] | Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] | Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] | Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] | Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] | Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member]
Financing Receivable Credit Quality Indicators
Total loans	5,076	12,451
Substandard [Member] | One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	475	576
Substandard [Member] | One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	271
Substandard [Member] | Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	2,119	4,656
Substandard [Member] | Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	511
Substandard [Member] | Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	2,407	4,981
Substandard [Member] | Construction loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] | Land loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	842
Substandard [Member] | Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	75	614
Substandard [Member] | Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] | Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] | Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] | Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] | Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Pass [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,237,503	1,222,462
Pass [Member] | One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	99,095	112,449
Pass [Member] | One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	39,658	43,858
Pass [Member] | Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	297,485	312,329
Pass [Member] | Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	204,929	187,358
Pass [Member] | Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	183,383	219,859
Pass [Member] | Construction loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	625	21
Pass [Member] | Land loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	380	450
Pass [Member] | Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	34,254	29,377
Pass [Member] | Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	36,989	17,716
Pass [Member] | Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	34,290	31,809
Pass [Member] | Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	89,332	95,305
Pass [Member] | Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	215,237	170,100
Pass [Member] | Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,846	1,831
Special Mention [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,994	2,163
Special Mention [Member] | One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] | One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	211	219
Special Mention [Member] | Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	329	344
Special Mention [Member] | Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] | Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	1,600
Special Mention [Member] | Construction loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] | Land loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] | Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] | Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,270	0
Special Mention [Member] | Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] | Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	184	0
Special Mention [Member] | Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] | Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,190	3,025
Financing Receivables, 30 to 59 Days Past Due [Member] | One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	543	2,000
Financing Receivables, 30 to 59 Days Past Due [Member] | One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	2	299
Financing Receivables, 30 to 59 Days Past Due [Member] | Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	651
Financing Receivables, 30 to 59 Days Past Due [Member] | Wholesale commercial lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Construction loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due		0
Financing Receivables, 30 to 59 Days Past Due [Member] | Land loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	4
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Loans - Municipal loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	236	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial loans - other [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Leases - Investment Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 409	50
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due		$ 21

Loans Receivable - Narrative (D

Loans Receivable - Narrative (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Valuation and Qualifying Accounts Disclosure [Line Items]
Reserve For Uncollected Loan Interest	$ 200,000		$ 200,000
Financing receivable modifications	413,000		2,678,000
Outstanding Commitments To Borrowers Loans Classified As Troubled Debt Restructurings	0		0
Troubled Debt Restructurings Value Of Decreased Interest Income	0	$ 0
Financing Receivable, Modifications, Increase In Allowance For Loan And Leases Losses	0	0
Charges regarding TDRs	0	127,000
Loans modified	615,000	$ 2,600,000
Allowance for Loan and Lease Losses [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation of reserves allocation	$ 0		$ 0

Fair Value - Financial Assets A

Fair Value - Financial Assets Accounted for at Fair Value (Details) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	$ 346,000		$ 513,000
Schedule of Company's financial instruments measured at fair values
Total Fair value	99,899,000		114,753,000
Real Estate Acquired Through Foreclosure Fair Value	2,836,000		1,664,000
Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	76,901,000		87,901,000
Equity Funds [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	515,000		507,000
Residential Mortgage Backed Securities [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	16,552,000		19,180,000
Collateralized Debt Obligations [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	5,913,000		7,142,000
SBA-guaranteed loan participation certificates [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	18,000		23,000
Nonrecurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	346,000		513,000
Schedule of Company's financial instruments measured at fair values
Total Fair value	99,899,000		114,753,000
Real Estate Acquired Through Foreclosure Fair Value	2,836,000		1,664,000
Servicing Asset at Fair Value, Amount	240,000		281,000
Nonrecurring [Member] | Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	76,901,000		87,901,000
Nonrecurring [Member] | Equity mutual fund [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	515,000		507,000
Nonrecurring [Member] | Mortgage-backed securities - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	16,552,000		19,180,000
Nonrecurring [Member] | Collateralized mortgage obligations - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	5,913,000		7,142,000
Nonrecurring [Member] | SBA-guaranteed loan participation certificates [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	18,000		23,000
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	0		0
Schedule of Company's financial instruments measured at fair values
Total Fair value	515,000		507,000
Real Estate Acquired Through Foreclosure Fair Value	0		0
Servicing Asset at Fair Value, Amount	0		0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mortgage-backed securities - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Collateralized mortgage obligations - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | SBA-guaranteed loan participation certificates [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	0		0
Schedule of Company's financial instruments measured at fair values
Total Fair value	99,384,000		114,246,000
Real Estate Acquired Through Foreclosure Fair Value	0		0
Servicing Asset at Fair Value, Amount	240,000		281,000
Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member] | Equity mutual fund [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	346,000		513,000
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Real Estate Acquired Through Foreclosure Fair Value	2,836,000		1,664,000
Servicing Asset at Fair Value, Amount	0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Equity mutual fund [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage-backed securities - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Collateralized mortgage obligations - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | SBA-guaranteed loan participation certificates [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0		0
One to Four Family Residential Real Estate Loans [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			42,000
One to Four Family Residential Real Estate Loans [Member] | Nonrecurring [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	2,162,000		42,000
One to Four Family Residential Real Estate Loans [Member] | Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	0		0
One to Four Family Residential Real Estate Loans [Member] | Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	0		0
One to Four Family Residential Real Estate Loans [Member] | Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	2,162,000
Multi Family Mortgage Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value			477,000
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			354,000
Multi Family Mortgage Loans [Member] | Nonrecurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	112,000		477,000
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			354,000
Multi Family Mortgage Loans [Member] | Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	0		0
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			0
Multi Family Mortgage Loans [Member] | Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	0		0
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			0
Multi Family Mortgage Loans [Member] | Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	112,000
Commercial Real Estate [Member] | Nonrecurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	234,000		36,000
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	674,000		474,000
Commercial Real Estate [Member] | Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	0		0
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	0		0
Commercial Real Estate [Member] | Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	0		0
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	0		0
Commercial Real Estate [Member] | Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value	234,000
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value	$ 674,000
Nonresidential Real Estate Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loan Fair Value			36,000
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			474,000
Land Loans [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			794,000
Land Loans [Member] | Nonrecurring [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			794,000
Land Loans [Member] | Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			0
Land Loans [Member] | Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Schedule of Company's financial instruments measured at fair values
Real Estate Acquired Through Foreclosure Fair Value			$ 0
Sales Comparison Valuation Technique [Member] | One to Four Family Residential Real Estate Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description		Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Discount applied to valuation	Discount applied to valuation
Sales Comparison Valuation Technique [Member] | Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Sales comparison
Sales Comparison Valuation Technique [Member] | Multi Family Mortgage Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Sales comparison	Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Comparison between sales and income approaches	Comparison between sales and income approaches
Sales Comparison Valuation Technique [Member] | Commercial Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Sales comparison	Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Comparison between sales and income approaches	Comparison between sales and income approaches
Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Sales comparison	Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Comparison between sales and income approaches	Comparison between sales and income approaches
Sales Comparison Valuation Technique [Member] | Land Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description		Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description		Discount applied to valuation
Income Approach Valuation Technique [Member] | Multi Family Mortgage Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Income approach	Income approach
Fair Value Measurements, Sensitivity Analysis, Description	Cap Rate	Cap Rate
Income Approach Valuation Technique [Member] | Nonresidential Real Estate Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Income approach
Fair Value Measurements, Sensitivity Analysis, Description	Cap Rate

Fair Value - Assets Measured at

Fair Value - Assets Measured at Fair Value on a Non-Recurring Basis (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Impaired Loans Carrying Amount	$ 400,000		$ 600,000
Impaired Loans Valuation Allowance	39,000		44,000
allowance for loan losses, specific reserve, increase or decrease	(5,000)	$ 384,000
Other Real Estate	3,200,000		2,500,000
Real Estate Owned, Valuation Allowance, Component	398,000		881,000
Fair Value, Impaired loans	346,000		513,000
Fair Value, Other real estate owned	2,836,000		1,664,000
Other Real Estate Owned Write Downs	244,000	467,000
Mortgage Servicing Rights (MSR) Impairment (Recovery)	0	$ (2,000)
One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Other real estate owned			42,000
Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans			477,000
Fair Value, Other real estate owned			354,000
Nonresidential Real Estate Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans			36,000
Fair Value, Other real estate owned			474,000
Nonrecurring [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	346,000		513,000
Fair Value, Other real estate owned	2,836,000		1,664,000
Mortgage servicing rights	240,000		281,000
Nonrecurring [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Other real estate owned	2,162,000		42,000
Nonrecurring [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	112,000		477,000
Fair Value, Other real estate owned			354,000
Nonrecurring [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	234,000		36,000
Fair Value, Other real estate owned	674,000		474,000
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	0		0
Fair Value, Other real estate owned	0		0
Mortgage servicing rights	0		0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Other real estate owned	0		0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	0		0
Fair Value, Other real estate owned			0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	0		0
Fair Value, Other real estate owned	0		0
Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	0		0
Fair Value, Other real estate owned	0		0
Mortgage servicing rights	240,000		281,000
Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Other real estate owned	0		0
Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	0		0
Fair Value, Other real estate owned			0
Nonrecurring [Member] | Significant Observable Inputs (Level 2) [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	0		0
Fair Value, Other real estate owned	0		0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	346,000		513,000
Fair Value, Other real estate owned	2,836,000		1,664,000
Mortgage servicing rights	0		$ 0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Other real estate owned	2,162,000
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	112,000
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Impaired loans	234,000
Fair Value, Other real estate owned	$ 674,000
Sales Comparison Valuation Technique [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description		Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Discount applied to valuation	Discount applied to valuation
Sales Comparison Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Sales comparison	Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Comparison between sales and income approaches	Comparison between sales and income approaches
Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Sales comparison	Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Comparison between sales and income approaches	Comparison between sales and income approaches
Sales Comparison Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Sales comparison	Sales comparison
Fair Value Measurements, Sensitivity Analysis, Description	Comparison between sales and income approaches	Comparison between sales and income approaches
Income Approach Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Income approach	Income approach
Fair Value Measurements, Sensitivity Analysis, Description	Cap Rate	Cap Rate
Income Approach Valuation Technique [Member] | Nonresidential Real Estate Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Valuation Processes, Description	Income approach
Fair Value Measurements, Sensitivity Analysis, Description	Cap Rate
Maximum [Member] | impaired loans [Member] | Sales Comparison Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments	85.70%		39.30%
Maximum [Member] | impaired loans [Member] | Sales Comparison Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments	(10.20%)		1.20%
Maximum [Member] | impaired loans [Member] | Income Approach Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Cap Rate	10.00%		8.75%
Maximum [Member] | impaired loans [Member] | Income Approach Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Cap Rate	8.50%
Maximum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate			2.80%
Maximum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			10.37%
Maximum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			1.46%
Maximum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			17.24%
Maximum [Member] | Real Estate [Member] | Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate	54.90%
Minimum [Member] | impaired loans [Member] | Sales Comparison Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments	85.70%		39.30%
Minimum [Member] | impaired loans [Member] | Sales Comparison Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments	(10.20%)		1.20%
Minimum [Member] | impaired loans [Member] | Income Approach Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Cap Rate	10.00%		8.75%
Minimum [Member] | impaired loans [Member] | Income Approach Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Cap Rate	8.50%
Minimum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate			(0.35%)
Minimum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			(67.74%)
Minimum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			(15.60%)
Minimum [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			(7.70%)
Minimum [Member] | Real Estate [Member] | Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate	(3.20%)
Weighted Average [Member] | impaired loans [Member] | Sales Comparison Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments	85.70%		39.30%
Weighted Average [Member] | impaired loans [Member] | Sales Comparison Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments	(10.20%)		1.20%
Weighted Average [Member] | impaired loans [Member] | Income Approach Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Cap Rate	10.00%		8.75%
Weighted Average [Member] | impaired loans [Member] | Income Approach Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Cap Rate	8.50%
Weighted Average [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | One-to-four family residential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate			0.03%
Weighted Average [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Multi-family mortgage loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			(13.00%)
Weighted Average [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			(5.00%)
Weighted Average [Member] | Real Estate [Domain] | Sales Comparison Valuation Technique [Member] | Nonresidential real estate loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Comparability Adjustments			6.00%
Weighted Average [Member] | Real Estate [Member] | Sales Comparison Valuation Technique [Member] | Nonresidential Real Estate [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Inputs, Discount Rate	11.00%

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Estimated Fair Value of Finanical Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 100,530	$ 59,377	$ 61,470	$ 59,581
Financial assets
Securities, carrying amount	99,899	114,753
Loans receivable, net of allowance for loan losses, carrying amounts	1,241,808	1,232,257
FHLBC stock, carrying amount	6,257	6,257
Accrued interest receivable, carrying amount	4,156	4,226
Estimate of Fair Value, Fair Value Disclosure [Member]
Financial assets
Available-for-sale Securities, Fair Value Disclosure	99,899	114,753
Loans Receivable, Fair Value Disclosure	1,263,229	1,241,304
Accounts Receivable, Fair Value Disclosure	4,156	4,226
Financial liabilities
Cash and Cash Equivalents, Fair Value Disclosure	100,530	59,377
Demand Deposit Accounts Fair Value Disclosure	234,652	254,830
Deposits Savings Deposits Fair Value Disclosure	155,199	156,752
Now Money Market Accounts Fair Value Disclosure	584,100	578,636
Certificates Of Deposit Fair Value Disclosure	342,797	222,026
Short Term Borrowings Fair Value Disclosure	1,407	64,318
Accrued Liabilities, Fair Value Disclosure	84	39
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 1 [Member]
Financial assets
Loans Receivable, Fair Value Disclosure		0
Accounts Receivable, Fair Value Disclosure		0
Financial liabilities
Cash and Cash Equivalents, Fair Value Disclosure	9,499	13,192
Demand Deposit Accounts Fair Value Disclosure		0
Deposits Savings Deposits Fair Value Disclosure		0
Now Money Market Accounts Fair Value Disclosure		0
Certificates Of Deposit Fair Value Disclosure		0
Short Term Borrowings Fair Value Disclosure		0
Accrued Liabilities, Fair Value Disclosure		0
Estimate of Fair Value, Fair Value Disclosure [Member] | Level 2 [Member]
Financial assets
Available-for-sale Securities, Fair Value Disclosure	99,384	114,246
Loans Receivable, Fair Value Disclosure	1,262,883	1,240,791
Accounts Receivable, Fair Value Disclosure	4,156	4,226
Financial liabilities
Cash and Cash Equivalents, Fair Value Disclosure	91,031	46,185
Demand Deposit Accounts Fair Value Disclosure	234,652	254,830
Deposits Savings Deposits Fair Value Disclosure	155,199	156,752
Now Money Market Accounts Fair Value Disclosure	584,100	578,636
Certificates Of Deposit Fair Value Disclosure	342,797	222,026
Short Term Borrowings Fair Value Disclosure		64,318
Accrued Liabilities, Fair Value Disclosure	84	39
Estimate of Fair Value, Fair Value Disclosure [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Loans Receivable, Fair Value Disclosure	346	513
Reported Value Measurement [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Cash and Cash Equivalents, at Carrying Value	100,530	59,377
Financial assets
Securities, carrying amount	99,899	114,753
Loans receivable, net of allowance for loan losses, carrying amounts	1,241,808	1,232,257
FHLBC stock, carrying amount	6,257	6,257
Accrued interest receivable, carrying amount	4,156	4,226
Financial liabilities
Demand Deposit Accounts	234,652	254,830
Deposits, Savings Deposits	155,199	156,752
Now Money Market Accounts	584,100	578,636
Certificates of Deposit, at Carrying Value	342,744	222,701
Short-term Debt	1,406	64,318
Accrued Interest Payable	84	39
Equity Funds [Member]
Financial assets
Securities, carrying amount	$ 515	$ 507

Other Real Estate Owned (Detail

Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Other Real Estate Owned At Carrying Value	$ 4,381	$ 4,809	$ 4,381	$ 4,809	$ 5,373	$ 7,011	$ 5,539	$ 6,358
Real Estate Owned, Valuation Allowance, Amounts Applied	(170)	(64)	(677)	(94)
Real Estate Owned, Valuation Allowance, Valuation Increase	115	231	244	467
Real Estate Owned, Valuation Allowance	(609)	(1,269)	(609)	(1,269)	$ (664)	(1,042)	$ (1,102)	$ (896)
Other Real Estate, Disposals	(971)	(646)	(2,601)	(2,396)
Other Real Estate, Valuation Adjustments	(115)	(231)	(244)	(467)
Other Real Estate, Additions	94	$ 147	215	$ 1,314
Other real estate owned at carrying value before valuation allowance	4,990		4,990			8,053
Multi Family Mortgage Loans [Member]
Other Real Estate Owned At Carrying Value	393		393			951
Real Estate Owned, Valuation Allowance	37		37			74
Other real estate owned at carrying value before valuation allowance	430		430			1,025
One to Four Family Residential Real Estate Loans [Member]
Other Real Estate Owned At Carrying Value	2,281		2,281			2,621
Real Estate Owned, Valuation Allowance	156		156			63
Other real estate owned at carrying value before valuation allowance	2,437		2,437			2,684
Nonresidential Real Estate [Member]
Other Real Estate Owned At Carrying Value	780		780			1,747
Real Estate Owned, Valuation Allowance	242		242			239
Other real estate owned at carrying value before valuation allowance	1,022		1,022			1,986
Land [Member]
Other Real Estate Owned At Carrying Value	927		927			1,692
Real Estate Owned, Valuation Allowance	174		174			666
Other real estate owned at carrying value before valuation allowance	$ 1,101		$ 1,101			$ 2,358

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Available-for-sale Securities Pledged as Collateral	$ 5,300	$ 6,000
Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned	$ 1,406	$ 2,318

Uncategorized Items - bfin-2016

Label	Element	Value
Dividends, Common Stock, Cash	us-gaap_DividendsCommonStockCash	$ (3,328,000)
Retained Earnings [Member]
Dividends, Common Stock, Cash	us-gaap_DividendsCommonStockCash	(3,328,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	2,349,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	$ 2,508,000