Waterstone Financial (WSBF) 10-Q 27 Oct 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Oct. 26, 2017	Jun. 30, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	Waterstone Financial, Inc.
Entity Central Index Key	1,569,994
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 447.1
Entity Common Stock, Shares Outstanding		29,489,346
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash	$ 39,308	$ 7,878
Federal funds sold	34,916	26,828
Interest-earning deposits in other financial institutions and other short term investments	18,367	12,511
Cash and cash equivalents	92,591	47,217
Securities available for sale (at fair value)	200,840	226,795
Loans held for sale (at fair value)	175,137	225,248
Loans receivable	1,261,160	1,177,884
Less: Allowance for loan losses	14,063	16,029
Loans receivable, net	1,247,097	1,161,855
Office properties and equipment, net	22,889	23,655
Federal Home Loan Bank stock (at cost)	18,450	13,275
Cash surrender value of life insurance	65,665	61,509
Real estate owned, net	4,568	6,118
Prepaid expenses and other assets	26,891	24,947
Total assets	1,854,128	1,790,619
Liabilities:
Demand deposits	123,133	120,371
Money market and savings deposits	148,607	162,456
Time deposits	685,033	666,584
Total deposits	956,773	949,411
Borrowings	435,503	387,155
Advance payments by borrowers for taxes	25,107	4,716
Other liabilities	24,815	38,647
Total liabilities	1,442,198	1,379,929
Shareholders' equity:
Preferred stock (par value $.01 per share) Authorized - 50,000,000 shares in 2017 and in 2016, no shares issued	0	0
Common stock (par value $.01 per share) Authorized - 100,000,000 shares in 2017 and in 2016, Issued - 29,554,466 in 2017 and 29,430,123 in 2016, Outstanding - 29,554,466 in 2017 and 29,430,123 in 2016	295	294
Additional paid-in capital	325,753	322,934
Retained earnings	183,578	184,565
Unearned ESOP shares	(19,288)	(20,178)
Accumulated other comprehensive income (loss), net of taxes	328	(378)
Cost of shares repurchased (5,957,833 shares at September 30, 2017 and 5,908,150 shares at December 31, 2016)	(78,736)	(76,547)
Total shareholders' equity	411,930	410,690
Total liabilities and shareholders' equity	$ 1,854,128	$ 1,790,619

CONSOLIDATED STATEMENTS OF FIN3

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016
Shareholders' equity:
Preferred stock - par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock - shares authorized (in shares)	50,000,000	50,000,000
Preferred stock - shares issued (in shares)	0	0
Common stock - par value (in dollars per share)	$ 0.01	$ 0.01
Common stock - shares authorized (in shares)	100,000,000	100,000,000
Common stock - shares issued (in shares)	29,483,346	29,430,123
Common stock - shares outstanding (in shares)	29,483,346	29,430,123
Treasury shares (in shares)	6,030,900	5,908,150

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income:
Loans	$ 15,855	$ 14,754	$ 45,078	$ 42,611
Mortgage-related securities	647	743	2,021	2,371
Debt securities, federal funds sold and short-term investments	951	833	2,680	2,692
Total interest income	17,453	16,330	49,779	47,674
Interest expense:
Deposits	1,981	1,923	5,614	5,477
Borrowings	2,439	3,082	6,756	10,724
Total interest expense	4,420	5,005	12,370	16,201
Net interest income	13,033	11,325	37,409	31,473
Provision for loan losses	20	135	(1,166)	340
Net interest income after provision for loan losses	13,013	11,190	38,575	31,133
Noninterest income:
Service charges on loans and deposits	300	789	1,148	1,742
Increase in cash surrender value of life insurance	688	734	1,476	1,446
Loss on sale of securities	0	0	(107)	0
Mortgage banking income	31,863	35,552	92,774	91,146
Other	203	337	941	874
Total noninterest income	33,054	37,412	96,232	95,208
Noninterest expenses:
Compensation, payroll taxes, and other employee benefits	26,153	27,573	73,732	70,968
Occupancy, office furniture and equipment	2,533	2,319	7,587	7,074
Advertising	821	661	2,414	1,974
Data processing	623	616	1,854	1,897
Communications	394	374	1,170	1,088
Professional fees	629	474	1,953	1,486
Real estate owned	(20)	37	258	344
FDIC insurance premiums	129	140	366	500
Other	3,054	3,347	10,227	9,663
Total noninterest expenses	34,316	35,541	99,561	94,994
Income before income tax	11,751	13,061	35,246	31,347
Income tax expense	4,362	5,556	12,397	12,214
Net income	$ 7,389	$ 7,505	$ 22,849	$ 19,133
Income per share:
Basic (in dollars per share)	$ 0.27	$ 0.28	$ 0.83	$ 0.71
Diluted (in dollars per share)	$ 0.26	$ 0.27	$ 0.82	$ 0.70
Weighted average shares outstanding:
Basic (in shares)	27,532	27,043	27,449	26,976
Diluted (in shares)	27,953	27,429	27,927	27,283

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net income	$ 7,389	$ 7,505	$ 22,849	$ 19,133
Net unrealized holding gain on available for sale securities:
Net unrealized holding gain arising during the period, net of tax expense of ($204), ($528), ($356), ($1,728), respectively	91	(596)	641	2,079
Reclassification adjustment for net loss included in net income during the period, net of tax benefit of ($42), $0, ($42), $0, respectively	0	0	65	0
Total other comprehensive income	91	(596)	706	2,079
Comprehensive income	$ 7,480	$ 6,909	$ 23,555	$ 21,212

CONSOLIDATED STATEMENTS OF COM6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other comprehensive income (loss), net of tax
Net unrealized holding gain (loss) on available for sale securities arising during the period, net of tax (expense) benefit	$ (59)	$ 385	$ (416)	$ (1,341)
Reclassification adjustment for net gains on available for sale securities realized during the period, net of taxes	$ 0	$ 0	$ (42)	$ 0

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Cost of Shares Repurchased [Member]	Total
Balances at Dec. 31, 2015	$ 294	$ 317,022	$ 168,089	$ (21,365)	$ 582	$ (72,692)	$ 391,930
Balances (in shares) at Dec. 31, 2015	29,407,000
Comprehensive income:
Net income (loss)	$ 0	0	19,133	0	0	0	19,133
Other comprehensive income	0	0	0	0	2,079	0	2,079
Total comprehensive income							21,212
ESOP shares committed to be released to Plan participants	0	278	0	890	0	0	1,168
Cash dividend	0	0	(5,762)	0	0	0	(5,762)
Stock compensation activity, net of tax	$ 3	3,434	0	0	0	0	3,437
Stock compensation activity, net of tax (in shares)	263,000
Stock compensation expense	$ 0	1,430	0	0	0	0	1,430
Purchase of common stock returned to authorized but unissued	$ (3)	0	0	0	0	(3,855)	(3,858)
Purchase of common stock returned to authorized but unissued (in shares)	(284,000)
Balances at Sep. 30, 2016	$ 294	322,164	181,460	(20,475)	2,661	(76,547)	409,557
Balances (in shares) at Sep. 30, 2016	29,386,000
Balances at Dec. 31, 2016	$ 294	322,934	184,565	(20,178)	(378)	(76,547)	$ 410,690
Balances (in shares) at Dec. 31, 2016	29,430,000						29,430,123
Comprehensive income:
Net income (loss)	$ 0	0	22,849	0	0	0	$ 22,849
Other comprehensive income	0	0	0	0	706	0	706
Total comprehensive income							23,555
ESOP shares committed to be released to Plan participants	0	572	0	890	0	0	1,462
Cash dividend	0	0	(23,836)	0	0	0	(23,836)
Stock compensation activity, net of tax	$ 2	820	0	0	0	0	822
Stock compensation activity, net of tax (in shares)	176,000
Stock compensation expense	$ 0	1,427	0	0	0	0	1,427
Purchase of common stock returned to authorized but unissued	$ (1)	0	0	0	0	(2,189)	(2,190)
Purchase of common stock returned to authorized but unissued (in shares)	(123,000)
Balances at Sep. 30, 2017	$ 295	$ 325,753	$ 183,578	$ (19,288)	$ 328	$ (78,736)	$ 411,930
Balances (in shares) at Sep. 30, 2017	29,483,000						29,483,346

CONSOLIDATED STATEMENTS OF CHA8

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) [Abstract]
Cash dividends (in dollars per share)	$ 0.86	$ 0.21

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income (loss)	$ 22,849	$ 19,133
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan losses	(1,166)	340
Provision for depreciation	1,549	2,061
Stock based compensation	1,427	1,430
Net amortization of premium/discount on debt and mortgage related securities	524	749
Amortization of unearned ESOP shares	1,462	1,168
Amortization and impairment of mortgage servicing rights	71	513
Gain on sale of loans held for sale	(94,219)	(93,481)
Loans originated for sale	(1,881,351)	(1,756,454)
Proceeds on sales of loans originated for sale	2,025,682	1,788,685
Increase in accrued interest receivable	(294)	(204)
Increase in cash surrender value of life insurance	(1,476)	(1,446)
Increase (decrease) in accrued interest on deposits and borrowings	2	(615)
(Decrease) increase in other liabilities	336	5,893
Increase in accrued tax receivable	(2,088)	(172)
Loss on sale of securities	107	0
Net loss related to real estate owned	(11)	(123)
Gain on sale of mortgage servicing rights	(308)	0
Other	440	(3,784)
Net cash provided by (used in) operating activities	73,536	(36,307)
Investing activities:
Net increase in loans receivable	(85,685)	(41,096)
Net change on FHLB stock	(5,175)	6,900
Purchases of:
Purchase of Debt Securities	(6,140)	(4,140)
Mortgage related securities	(6,940)	(5,236)
Premises and equipment, net	(939)	(925)
Bank owned life insurance	(2,680)	(10,180)
Proceeds from:
Principal repayments on mortgage-related securities	25,177	29,689
Maturities of debt securities	13,941	6,620
Sales of debt securities	448	0
Sales of real estate owned	3,104	5,304
Net cash used in investing activities	(64,889)	(13,064)
Financing activities:
Net (decrease) increase in deposits	7,362	62,288
Net change in short-term borrowings	(7,652)	56,780
Repayment of long term debt	(69,000)	(220,000)
Proceeds from long term debt	125,000	100,000
Net change in advance payments by borrowers for taxes	6,021	9,405
Cash dividends on common stock	(23,636)	(4,832)
Purchase of common stock returned to authorized but unissued	(2,190)	(3,858)
Proceeds from stock option exercises	822	3,437
Net cash provided by financing activities	36,727	3,220
Increase (decrease) in cash and cash equivalents	45,374	(46,151)
Cash and cash equivalents at beginning of period	47,217	100,471
Cash and cash equivalents at end of period	92,591	54,320
Cash paid or credited during the period for:
Income tax payments	14,141	11,009
Interest payments	12,368	16,816
Noncash activities:
Loans receivable transferred to real estate owned	1,609	3,442
Dividends declared but not paid in other liabilities	$ 3,877	$ 2,322

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Basis of Presentation [Abstract]
Basis of Presentation	The unaudited interim consolidated financial statements include the accounts of Waterstone Financial, Inc. (the "Company") and the Company's subsidiaries. WaterStone Bank SSB (the "Bank") is a community bank that has served the banking needs of its customers since 1921. WaterStone Bank also has an active mortgage banking subsidiary, Waterstone Mortgage Corporation. WaterStone Bank conducts its community banking business from 11 banking offices located in Milwaukee, Washington and Waukesha Counties, Wisconsin, as well as a loan production office in Minneapolis, Minnesota. WaterStone Bank's principal lending activity is originating one- to four-family, multi-family residential real estate, and commercial real estate loans for retention in its portfolio. WaterStone Bank also offers home equity loans and lines of credit, construction and land loans, and commercial business loans, and consumer loans. WaterStone Bank funds its loan production primarily with retail deposits and Federal Home Loan Bank advances. Our deposit offerings include: certificates of deposit, money market savings accounts, transaction deposit accounts, non-interest bearing demand accounts and individual retirement accounts. Our investment securities portfolio is comprised principally of mortgage-backed securities, government-sponsored enterprise bonds and municipal obligations. WaterStone Bank's mortgage banking operations are conducted through its wholly-owned subsidiary, Waterstone Mortgage Corporation. Waterstone Mortgage Corporation originates single-family residential real estate loans for sale into the secondary market. Waterstone Mortgage Corporation utilizes lines of credit provided by WaterStone Bank as a primary source of funds, and also utilizes a line of credit with another financial institution as needed. The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles ("GAAP") for interim financial information, Rule 10-01 of Regulation S-X and the instructions to Form 10-Q. The financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly the financial position, results of operations, changes in shareholders' equity, and cash flows of the Company for the periods presented. The accompanying unaudited consolidated financial statements and related notes should be read in conjunction with the Company's December 31, 2016 Annual Report on Form 10-K. Operating results for the nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017 or for any other period. The preparation of the unaudited consolidated financial statements requires management of the Company to make a number of estimates and assumptions relating to the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. Significant items subject to such estimates and assumptions include the allowance for loan losses, deferred income taxes and real estate owned. Actual results could differ from those estimates. Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or shareholders' equity. Impact of Recent Accounting Pronouncements Accounting Standards Codification (ASC) Topic 606 "Revenue from Contracts with Customers." ASC Topic 825 "Financial Instruments." ASC Topic 842 "Leases." ASC Topic 718 "Compensation - Stock Compensation." ASC Topic 326 "Financial Instruments - Credit Losses." ASC Topic 310 "Receivables - Nonrefundable Fees and Other Costs."

Securities Available for Sale

Securities Available for Sale	9 Months Ended
	Sep. 30, 2017
Securities Available for Sale [Abstract]
Securities Available for Sale	Note 2— Securities Available for Sale The amortized cost and fair values of the Company's investment in securities available for sale follow: September 30, 2017 Amortized cost Gross unrealized gains Gross unrealized losses Fair value (In Thousands) Mortgage-backed securities $ 61,692 $ 631 $ (105 ) $ 62,218 Collateralized mortgage obligations: Government sponsored enterprise issued 54,949 56 (345 ) 54,660 Mortgage-related securities 116,641 687 (450 ) 116,878 Government sponsored enterprise bonds 2,500 - (1 ) 2,499 Municipal securities 64,100 1,578 (16 ) 65,662 Other debt securities 15,005 61 (492 ) 14,574 Debt securities 81,605 1,639 (509 ) 82,735 Certificates of deposit 1,225 3 (1 ) 1,227 $ 199,471 $ 2,329 $ (960 ) $ 200,840 December 31, 2016 Amortized cost Gross unrealized gains Gross unrealized losses Fair value (In Thousands) Mortgage-backed securities $ 72,858 $ 798 $ (243 ) $ 73,413 Collateralized mortgage obligations: Government sponsored enterprise issued 62,297 70 (365 ) 62,002 Mortgage-related securities 135,155 868 (608 ) 135,415 Government sponsored enterprise bonds 2,500 4 (1 ) 2,503 Municipal securities 70,311 685 (300 ) 70,696 Other debt securities 17,399 154 (603 ) 16,950 Debt securities 90,210 843 (904 ) 90,149 Certificates of deposit 1,225 7 (1 ) 1,231 $ 226,590 $ 1,718 $ (1,513 ) $ 226,795 The Company's mortgage-backed securities and collateralized mortgage obligations issued by government sponsored enterprises are guaranteed by Fannie Mae, Freddie Mac or Ginnie Mae. At September 30, 2017, $25.6 million of the Company's mortgage related securities were pledged as collateral to secure repurchase agreement obligations of the Company. As of September 30, 2017, $2.7 million of the Company's mortgage related securities were pledged as collateral to secure At December 31, 2016, $93.2 million of the Company's government sponsored enterprise bonds and $2.4 million of the Company's mortgage related securities were pledged as collateral to secure . The amortized cost and fair values of investment securities by contractual maturity at September 30, 2017 are shown below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Cost Fair Value (In Thousands) Debt and other securities Due within one year $ 11,214 $ 11,207 Due after one year through five years 20,919 21,116 Due after five years through ten years 36,891 38,178 Due after ten years 13,806 13,461 Mortgage-related securities 116,641 116,878 $ 199,471 $ 200,840 Gross unrealized losses on securities available for sale and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position were as follows: September 30, 2017 Less than 12 months 12 months or longer Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss (In Thousands) Mortgage-backed securities $ 8,547 $ (42 ) $ 3,553 $ (63 ) $ 12,100 $ (105 ) Collateralized mortgage obligations: Government sponsored enterprise issued 33,229 (313 ) 2,188 (32 ) 35,417 (345 ) Government sponsored enterprise bonds 2,499 (1 ) - - 2,499 (1 ) Municipal securities 10,301 (15 ) 101 (1 ) 10,402 (16 ) Other debt securities - - 9,508 (492 ) 9,508 (492 ) Certificates of deposit 489 (1 ) - - 489 (1 ) $ 55,065 $ (372 ) $ 15,350 $ (588 ) $ 70,415 $ (960 ) December 31, 2016 Less than 12 months 12 months or longer Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss (In Thousands) Mortgage-backed securities $ 23,433 $ (222 ) $ 1,068 $ (21 ) $ 24,501 $ (243 ) Collateralized mortgage obligations: Government sponsored enterprise issued 39,395 (365 ) - - 39,395 (365 ) Government sponsored enterprise bonds 2,000 (1 ) - - 2,000 (1 ) Municipal securities 32,141 (300 ) - - 32,141 (300 ) Other debt securities - - 9,397 (603 ) 9,397 (603 ) Certificates of deposit 489 (1 ) - - 489 (1 ) $ 97,458 $ (889 ) $ 10,465 $ (624 ) $ 107,923 $ (1,513 ) The Company reviews the investment securities portfolio on a quarterly basis to monitor its exposure to other-than-temporary impairment. In evaluating whether a security's decline in market value is other-than-temporary, management considers the length of time and extent to which the fair value has been less than cost, the financial condition of the issuer and the underlying obligors, quality of credit enhancements, volatility of the fair value of the security, the expected recovery period of the security and ratings agency evaluations. In addition, the Company may also evaluate payment structure, whether there are defaulted payments or expected defaults, prepayment speeds and the value of any underlying collateral. The following table presents the change in other-than-temporary credit related impairment charges on securities available for sale for which a portion of the other-than-temporary impairments related to other factors was recognized in other comprehensive loss. (In Thousands) Credit-related impairments on securities as of December 31, 2015 $ 117 Credit-related impairments related to securities for which an other- than-temporary impairment was not previously recognized - Decrease in credit-related impairments related to securities for which an other-than-temporary impairment was previously recognized (23 ) Credit-related impairments on securities as of December 31, 2016 94 Credit-related impairments related to securities for which an other- than-temporary impairment was not previously recognized - Increase in credit-related impairments related to securities for which an other-than-temporary impairment was previously recognized - Credit-related impairments on securities as of September 30, 2017 $ 94 As of September 30, 2017, the Company held one municipal security that had previously been deemed to be other-than-temporarily impaired. The security was issued by a tax incremental district in a municipality located in Wisconsin. During the year ended December 31, 2012, the Company received audited financial statements with respect to the municipal issuer that called into question the ability of the underlying taxing district that issued the security to operate as a going concern. During the year ended December 31, 2012, the Company's analysis of this security resulted in $77,000 in credit losses charged to earnings with respect to this municipal security. An additional $17,000 credit loss was charged to earnings during the year ended December 31, 2014 with respect to this security as a sale occurred at a discounted price. As of September 30, 2017, this security had an amortized cost of $116,000 and total life-to-date impairment of $94,000. As of September 30, 2017, the Company had four mortgage-backed securities, two government sponsored enterprise issued securities, one municipal bond security, and one other debt security which had been in an unrealized loss position for twelve months or longer. These securities were determined not to be other-than-temporarily impaired as of September 30, 2017. The Company has determined that the decline in fair value of these securities is primarily attributable to an increase in market interest rates compared to the stated rates on these securities and is not attributable to credit deterioration. As the Company does not intend to sell nor is it more likely than not that it will be required to sell these securities before recovery of the amortized cost basis, these securities are not considered other-than-temporarily impaired. Deterioration of general economic market conditions could result in the recognition of future other than temporary impairment losses within the investment portfolio and such amounts could be material to our consolidated financial statements. During the nine months ended September 30, 2017, proceeds from the sale of securities totaled $448,000 and resulted in losses totaling $107,000. The $107,000 included in loss on sale of available for sale securities in the consolidated statements of income during the nine months ended September 30, 2017 was reclassified from accumulated other comprehensive income. There were no sales of securities during the nine months ended September 30, 2016.

Loans Receivable

Loans Receivable	9 Months Ended
	Sep. 30, 2017
Loan Receivable [Abstract]
Loans Receivable	Note 3 - Loans Receivable Loans receivable at September 30, 2017 and December 31, 2016 are summarized as follows: September 30, 2017 December 31, 2016 (In Thousands) Mortgage loans: Residential real estate: One- to four-family $ 427,195 $ 392,817 Multi-family 580,134 558,592 Home equity 21,606 21,778 Construction and land 16,451 18,179 Commercial real estate 181,328 159,401 Consumer 266 319 Commercial loans 34,180 26,798 $ 1,261,160 $ 1,177,884 The Company provides several types of loans to its customers, including residential, construction, commercial and consumer loans. Significant loan concentrations are considered to exist for a financial institution when there are amounts loaned to one borrower or to multiple borrowers engaged in similar activities that would cause them to be similarly impacted by economic or other conditions. While the Company's credit risks are geographically concentrated in the Milwaukee metropolitan area, there are no concentrations with individual or groups of related borrowers. Qualifying loans receivable totaling $950.7 million and $911.9 million at September 30, 2017 and December 31, 2016, respectively, are pledged as collateral against $410.0 million and $295.0 million in outstanding Federal Home Loan Bank of Chicago (FHLBC) advances under a blanket security agreement at September 30, 2017 and December 31, 2016. Certain of the Company's executive officers, directors, employees, and their related interests have loans with the Bank. As of September 30, 2017 and December 31, 2016, loans aggregating approximately $4.7 million and $5.1 million, respectively, were outstanding to such parties. None of these loans were considered impaired as of September 30, 2017 or December 31, 2016. As of September 30, 2017 and December 31, 2016, there were no loans 90 or more days past due and still accruing interest. An analysis of past due loans receivable as of September 30, 2017 and December 31, 2016 follows: As of September 30, 2017 1-59 Days Past Due (1) 60-89 Days Past Due (2) 90 Days or Greater Total Past Due Current (3) Total Loans (In Thousands) Mortgage loans: Residential real estate: One- to four-family $ 1,859 $ 192 $ 4,161 $ 6,212 $ 420,983 $ 427,195 Multi-family 332 - 407 739 579,395 580,134 Home equity 220 - 91 311 21,295 21,606 Construction and land - - 37 37 16,414 16,451 Commercial real estate 1,270 156 181 1,607 179,721 181,328 Consumer - - - - 266 266 Commercial loans 23 - 26 49 34,131 34,180 Total $ 3,704 $ 348 $ 4,903 $ 8,955 $ 1,252,205 $ 1,261,160 As of December 31, 2016 1-59 Days Past Due (1) 60-89 Days Past Due (2) 90 Days or Greater Total Past Due Current (3) Total Loans (In Thousands) Mortgage loans: Residential real estate: One- to four-family $ 2,403 $ 7 $ 4,623 $ 7,033 $ 385,784 $ 392,817 Multi-family 376 - 401 777 557,815 558,592 Home equity 82 - 35 117 21,661 21,778 Construction and land - - - - 18,179 18,179 Commercial real estate - - 203 203 159,198 159,401 Consumer - - - - 319 319 Commercial loans 42 - 27 69 26,729 26,798 Total $ 2,903 $ 7 $ 5,289 $ 8,199 $ 1,169,685 $ 1,177,884 (1) Includes $96,000 and $148,000 at September 30, 2017 and December 31, 2016, respectively, which are on non-accrual status. (2) Includes $24,000 and $- at September 30, 2017 and December 31, 2016, respectively, which are on non-accrual status. (3) Includes $2.0 million and $4.4 million at September 30, 2017 and December 31, 2016, respectively, which are on non-accrual status. A summary of the activity for the nine months ended September 30, 2017 and 2016 in the allowance for loan losses follows: One- to Four- Family Multi-Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) Nine months ended September 30, 2017 Balance at beginning of period $ 7,164 $ 4,809 $ 364 $ 1,016 $ 1,951 $ 12 $ 713 $ 16,029 Provision (credit) for loan losses (249 ) (396 ) 8 (283 ) (170 ) (2 ) (74 ) (1,166 ) Charge-offs (1,092 ) (92 ) - (14 ) (6 ) - - (1,204 ) Recoveries 200 102 21 80 1 - - 404 Balance at end of period $ 6,023 $ 4,423 $ 393 $ 799 $ 1,776 $ 10 $ 639 $ 14,063 Nine months ended September 30, 2016 Balance at beginning of period $ 7,763 $ 5,000 $ 433 $ 904 $ 1,680 $ 9 $ 396 $ 16,185 Provision (credit) for loan losses 141 23 (25 ) (123 ) 33 3 288 340 Charge-offs (801 ) (488 ) (62 ) (3 ) - - - (1,354 ) Recoveries 246 134 24 58 - - - 462 Balance at end of period $ 7,349 $ 4,669 $ 370 $ 836 $ 1,713 $ 12 $ 684 $ 15,633 A summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class as of September 30, 2017 follows: One- to Four- Family Multi- Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) Allowance related to loans individually evaluated for impairment $ 198 $ - $ 77 $ - $ 38 $ - $ - $ 313 Allowance related to loans collectively evaluated for impairment 5,825 4,423 316 799 1,738 10 639 13,750 Balance at end of period $ 6,023 $ 4,423 $ 393 $ 799 $ 1,776 $ 10 $ 639 $ 14,063 Loans individually evaluated for impairment $ 8,456 $ 833 $ 302 $ 37 $ 472 $ - $ 26 $ 10,126 Loans collectively evaluated for impairment 418,739 579,301 21,304 16,414 180,856 266 34,154 1,251,034 Total gross loans $ 427,195 $ 580,134 $ 21,606 $ 16,451 $ 181,328 $ 266 $ 34,180 $ 1,261,160 A summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class as of December 31, 2016 follows: One- to Four-Family Multi- Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) Allowance related to loans individually evaluated for impairment $ 499 $ - $ 79 $ - $ 83 $ - $ 1 $ 662 Allowance related to loans collectively evaluated for impairment 6,665 4,809 285 1,016 1,868 12 712 15,367 Balance at end of period $ 7,164 $ 4,809 $ 364 $ 1,016 $ 1,951 $ 12 $ 713 $ 16,029 Loans individually evaluated for impairment $ 10,920 $ 3,941 $ 442 $ - $ 718 $ - $ 41 $ 16,062 Loans collectively evaluated for impairment 381,897 554,651 21,336 18,179 158,683 319 26,757 1,161,822 Total gross loans $ 392,817 $ 558,592 $ 21,778 $ 18,179 $ 159,401 $ 319 $ 26,798 $ 1,177,884 The following table presents information relating to the Company's internal risk ratings of its loans receivable as of September 30, 2017 and December 31, 2016: One to Four- Family Multi-Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) At September 30, 2017 Substandard $ 8,899 $ 833 $ 272 $ 37 $ 1,062 $ - $ 1,595 $ 12,698 Watch 7,348 498 199 - 456 - 761 9,262 Pass 410,948 578,803 21,135 16,414 179,810 266 31,824 1,239,200 $ 427,195 $ 580,134 $ 21,606 $ 16,451 $ 181,328 $ 266 $ 34,180 $ 1,261,160 At December 31, 2016 Substandard $ 12,845 $ 1,427 $ 428 $ - $ 717 $ - $ 41 $ 15,458 Watch 10,509 3,975 149 436 1,389 - 3,671 20,129 Pass 369,463 553,190 21,201 17,743 157,295 319 23,086 1,142,297 $ 392,817 $ 558,592 $ 21,778 $ 18,179 $ 159,401 $ 319 $ 26,798 $ 1,177,884 Factors that are important to managing overall credit quality include sound loan underwriting and administration, systematic monitoring of existing loans and commitments, effective loan review on an ongoing basis, early identification of potential problems, an allowance for loan losses, and sound non-accrual and charge-off policies. Our underwriting policies require an officers' loan committee review and approval of all loans in excess of $500,000. In addition, we utilize an independent loan review function for all loans. Our ability to manage credit risk depends in large part on our ability to properly identify and manage problem loans. To do so, we maintain a loan review system under which our credit management personnel review non-owner occupied one- to four-family, multi-family, construction and land, commercial real estate and commercial loans that individually, or as part of an overall borrower relationship exceed $1.0 million in potential exposure. Loans meeting these criteria are reviewed on an annual basis, or more frequently, if the loan renewal is less than one year. With respect to this review process, management has determined that pass loans include loans that exhibit acceptable financial statements, cash flow and leverage. Watch loans have potential weaknesses that deserve management's attention, and if left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit. Substandard loans are considered inadequately protected by the current net worth and paying capacity of the obligor or the collateral pledged. These loans generally have a well-defined weakness that may jeopardize liquidation of the debt and are characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. Finally, a loan is considered to be impaired when it is probable that the Bank will not be able to collect all amounts due according to the contractual terms of the loan agreement. Management has determined that all non-accrual loans and loans modified under troubled debt restructurings meet the definition of an impaired loan. The Company's procedures dictate that an updated valuation must be obtained with respect to underlying collateral at the time a loan is deemed impaired. Updated valuations may also be obtained upon transfer from loans receivable to real estate owned based upon the age of the prior appraisal, changes in market conditions or known changes to the physical condition of the property. Estimated fair values are reduced to account for sales commissions, broker fees, unpaid property taxes and additional selling expenses to arrive at an estimated net realizable value. The adjustment factor is based upon the Company's actual experience with respect to sales of real estate owned over the prior two years. In situations in which we are placing reliance on an appraisal that is more than one year old, an additional adjustment factor is applied to account for downward market pressure since the date of appraisal. The additional adjustment factor is based upon relevant sales data available for our general operating market as well as company-specific historical net realizable values as compared to the most recent appraisal prior to disposition. With respect to multi-family income-producing real estate, appraisals are reviewed and estimated collateral values are adjusted by updating significant appraisal assumptions to reflect current real estate market conditions. Significant assumptions reviewed and updated include the capitalization rate, rental income and operating expenses. These adjusted assumptions are based upon recent appraisals received on similar properties as well as on actual experience related to real estate owned and currently under Company management. The following tables present data on impaired loans at September 30, 2017 and December 31, 2016. As of or for the Nine Months Ended September 30, 2017 Recorded Investment Unpaid Principal Reserve Cumulative Charge-Offs Average Recorded Investment Interest Paid (In Thousands) Total Impaired with Reserve One- to four-family $ 1,568 $ 1,568 $ 198 $ - $ 1,595 $ 57 Multi-family - - - - - - Home equity 159 159 77 - 165 10 Construction and land - - - - - - Commercial real estate 38 447 38 409 45 - Consumer - - - - - - Commercial - - - - - - 1,765 2,174 313 409 1,805 67 Total Impaired with no Reserve One- to four-family 6,888 8,385 - 1,497 7,409 251 Multi-family 833 1,699 - 866 834 63 Home equity 143 143 - - 147 4 Construction and land 37 51 - 14 45 - Commercial real estate 434 434 - - 436 11 Consumer - - - - - - Commercial 26 26 - - 26 - 8,361 10,738 - 2,377 8,897 329 Total Impaired One- to four-family 8,456 9,953 198 1,497 9,004 308 Multi-family 833 1,699 - 866 834 63 Home equity 302 302 77 - 312 14 Construction and land 37 51 - 14 45 - Commercial real estate 472 881 38 409 481 11 Consumer - - - - - - Commercial 26 26 - - 26 - $ 10,126 $ 12,912 $ 313 $ 2,786 $ 10,702 $ 396 As of or for the Year Ended December 31, 2016 Recorded Investment Unpaid Principal Reserve Cumulative Charge-Offs Average Recorded Investment Interest Paid (In Thousands) Total Impaired with Reserve One- to four-family $ 3,007 $ 3,007 $ 499 $ - $ 3,063 $ 88 Multi-family - - - - - - Home equity 188 188 79 - 198 15 Construction and land - - - - - - Commercial real estate 280 689 83 409 295 15 Consumer - - - - - - Commercial 1 1 1 - 2 - 3,476 3,885 662 409 3,558 118 Total Impaired with no Reserve One- to four-family 7,913 9,245 - 1,332 8,150 401 Multi-family 3,941 4,952 - 1,011 4,005 230 Home equity 254 254 - - 258 9 Construction and land - - - - - - Commercial real estate 438 438 - - 442 13 Consumer - - - - - - Commercial 40 40 - - 46 2 12,586 14,929 - 2,343 12,901 655 Total Impaired One- to four-family 10,920 12,252 499 1,332 11,213 489 Multi-family 3,941 4,952 - 1,011 4,005 230 Home equity 442 442 79 - 456 24 Construction and land - - - - - - Commercial real estate 718 1,127 83 409 737 28 Consumer - - - - - - Commercial 41 41 1 - 48 2 $ 16,062 $ 18,814 $ 662 $ 2,752 $ 16,459 $ 773 The difference between a loan's recorded investment and the unpaid principal balance represents a partial charge-off resulting from a confirmed loss when the value of the collateral securing the loan is below the loan balance and management's assessment that the full collection of the loan balance is not likely. When a loan is considered impaired, interest payments received are treated as interest income on a cash basis as long as the remaining book value of the loan (i.e., after charge-off of all identified losses) is deemed to be fully collectible. If the remaining book value is not deemed to be fully collectible, all payments received are applied to unpaid principal. Determination as to the ultimate collectability of the remaining book value is supported by an updated credit department evaluation of the borrower's financial condition and prospects for repayment, including consideration of the borrower's sustained historical repayment performance and other relevant factors. The determination as to whether an allowance is required with respect to impaired loans is based upon an analysis of the value of the underlying collateral and/or the borrower's intent and ability to make all principal and interest payments in accordance with contractual terms. The evaluation process is subject to the use of significant estimates and actual results could differ from estimates. This analysis is primarily based upon third party appraisals and/or a discounted cash flow analysis. In those cases in which no allowance has been provided for an impaired loan, the Company has determined that the estimated value of the underlying collateral exceeds the remaining outstanding balance of the loan. Of the total $8.4 million of impaired loans as of September 30, 2017 for which no allowance has been provided, $2.4 million in net charge-offs have been recorded to reduce the unpaid principal balance to an amount that is commensurate with the loans' net realizable value, using the estimated fair value of the underlying collateral. To the extent that further deterioration in property values continues, the Company may have to reevaluate the sufficiency of the collateral servicing these impaired loans resulting in additional provisions to the allowance for loans losses or charge-offs. At September 30, 2017, total impaired loans included $5.2 million of troubled debt restructurings. Troubled debt restructurings involve granting concessions to a borrower experiencing financial difficulty by modifying the terms of the loan in an effort to avoid foreclosure. The vast majority of debt restructurings include a modification of terms to allow for an interest only payment and/or reduction in interest rate. The restructured terms are typically in place for six to twelve months. At December 31, 2016, total impaired loans included $10.1 million of troubled debt restructurings. The following presents data on troubled debt restructurings: As of September 30, 2017 Accruing Non-accruing Total Amount Number Amount Number Amount Number (Dollars in Thousands) One- to four-family $ 2,747 2 $ 1,204 7 $ 3,951 9 Multi-family - - 833 3 833 3 Home Equity 48 1 - - 48 1 Commercial real estate 291 1 37 1 328 2 $ 3,086 4 $ 2,074 11 $ 5,160 15 As of December 31, 2016 Accruing Non-accruing Total Amount Number Amount Number Amount Number (Dollars in Thousands) One- to four-family $ 3,296 3 $ 2,399 34 $ 5,695 37 Multi-family 2,514 1 1,427 5 3,941 6 Home equity 49 1 97 1 146 2 Commercial real estate 295 1 60 1 355 2 $ 6,154 6 $ 3,983 41 $ 10,137 47 At September 30, 2017, $5.2 million in loans had been modified in troubled debt restructurings and $2.1 million of these loans were included in the non-accrual loan total. The remaining $3.1 million, while meeting the internal requirements for modification in a troubled debt restructuring, were current with respect to payments under their original loan terms at the time of the restructuring and, therefore, continued to be included with accruing loans. Provided these loans perform in accordance with the modified terms, they will continue to be accounted for on an accrual basis. All loans that have been modified in a troubled debt restructuring are considered to be impaired. As such, an analysis has been performed with respect to all of these loans to determine the need for a valuation reserve. When a loan is expected to perform in accordance with the restructured terms and ultimately return to and perform under contract terms, a valuation allowance is established for an amount equal to the excess of the present value of the expected future cash flows under the original contract terms as compared with the modified terms, including an estimated default rate. When there is doubt as to the borrower's ability to perform under the restructured terms or ultimately return to and perform under market terms, a valuation allowance is established equal to the impairment when the carrying amount exceeds fair value of the underlying collateral. As a result of the impairment analysis, a $96,000 valuation allowance has been established as of September 30, 2017 with respect to the $5.2 million in troubled debt restructurings. As of December 31, 2016, a $293,000 valuation allowance had been established with respect to the $10.1 million in troubled debt restructurings. After a troubled debt restructuring reverts to market terms, a minimum of six consecutive contractual payments must be received prior to consideration for a return to accrual status. If an updated credit department review indicates no other evidence of elevated credit risk, the loan is returned to accrual status at that time. The following presents troubled debt restructurings by concession type: As of September 30, 2017 Performing in accordance with modified terms In Default Total Amount Number Amount Number Amount Number (dollars in thousands) Interest reduction and principal forbearance $ 4,060 9 $ - - $ 4,060 9 Principal forbearance 48 1 - - 48 1 Interest reduction 356 3 696 2 1,052 5 $ 4,464 13 $ 696 2 $ 5,160 15 As of December 31, 2016 Performing in accordance with modified terms In Default Total Amount Number Amount Number Amount Number (dollars in thousands) Interest reduction and principal forbearance $ 8,221 22 $ 761 2 $ 8,982 24 Principal forbearance 49 1 - - 49 1 Interest reduction 1,106 22 - - 1,106 22 $ 9,376 45 $ 761 2 $ 10,137 47 There were no loans modified as troubled debt restructurings for the three months or nine months ended September 30, 2017. There was one home equity loan with a balance of $64,000 modified as a troubled debt restructuring modified during the three and nine months ended September 30, 2016. There were no troubled debt restructurings within the past twelve months for which there was a default during the three or nine months ended September 30, 2017 and September 30, 2016. The following table presents data on non-accrual loans as of September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 (Dollars in Thousands) Non-accrual loans: Residential One- to four-family $ 5,709 $ 7,623 Multi-family 833 1,427 Home equity 223 344 Construction and land 37 - Commercial real estate 181 422 Commercial 26 41 Consumer - - Total non-accrual loans $ 7,009 $ 9,857 Total non-accrual loans to total loans receivable 0.56 % 0.84 % Total non-accrual loans to total assets 0.38 % 0.55 %

Real Estate Owned

Real Estate Owned	9 Months Ended
	Sep. 30, 2017
Real Estate Owned [Abstract]
Real Estate Owned [Text Block]	Note 4— Real Estate Owned Real estate owned is summarized as follows: September 30, 2017 December 31, 2016 (In Thousands) One- to four-family $ 1,021 $ 2,141 Multi-family 169 - Construction and land 4,822 5,082 Commercial real estate 300 300 Total real estate owned 6,312 7,523 Valuation allowance at end of period (1,744 ) (1,405 ) Total real estate owned, net $ 4,568 $ 6,118 The following table presents the activity in the Company's real estate owned: Nine months ended September 30, 2017 2016 (In Thousands) Real estate owned at beginning of the period $ 6,118 9,190 Transferred from loans receivable 1,609 3,442 Sales (net of gains / losses) (2,654 ) (4,762 ) Write downs (504 ) (416 ) Other (1 ) - Real estate owned at the end of the period $ 4,568 7,454 Residential one- to four-family mortgage loans that were in the process of foreclosure were $3.0 million and $3.1 million at September 30, 2017 and December 31, 2016, respectively.

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2017
Mortgage Servicing Rights [Abstract]
Mortgage Servicing Rights	Note 5— Mortgage Servicing Rights The following table presents the activity in the Company's mortgage servicing rights: Nine months ended September 30, 2017 2016 (In Thousands) Mortgage servicing rights at beginning of the period $ 2,260 $ 1,422 Additions 793 1,486 Amortization (71 ) (412 ) Sales (2,264 ) - Mortgage servicing rights at end of the period 718 2,496 Valuation allowance at end of period - (100 ) Mortgage servicing rights at end of the period, net $ 718 $ 2,396 During the nine months ended September 30, 2017, $1.88 billion in residential loans were originated for sale. During the same period, sales of loans held for sale totaled $2.03 billion, generating mortgage banking income of $92.8 million. The unpaid principal balance of loans serviced for others was $99.2 million and $318.6 million at September 30, 2017 and December 31, 2016, respectively. These loans are not reflected in the consolidated statements of financial condition. During the nine months ended September 30, 2017, the Company sold mortgage servicing rights related to $295.1 million in loans receivable with a book value of $2.3 million for $2.6 million resulting in a gain on sale of $308,000. During the nine months ended September 30, 2016, the Company did not sell any mortgage servicing rights. The following table shows the estimated future amortization expense for mortgage servicing rights for the periods indicated: Estimate for the period ending December 31: (In Thousands) 2017 $ 25 2018 106 2019 96 2020 86 2021 76 Thereafter 329 Total $ 718

Deposits

Deposits	9 Months Ended
	Sep. 30, 2017
Deposits [Abstract]
Deposits	Note 6— Deposits At September 30, 2017 and December 31, 2016, time deposits with balances greater than $250,000 amounted to $43.6 million and $44.5 million, respectively. A summary of the contractual maturities of time deposits at September 30, 2017 is as follows: (In Thousands) Within one year $ 514,304 More than one to two years 153,213 More than two to three years 13,618 More than three to four years 1,358 More than four through five years 2,540 $ 685,033

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2017
Borrowings [Abstract]
Borrowings	Note 7— Borrowings Borrowings consist of the following: September 30, 2017 December 31, 2016 Balance Weighted Average Rate Balance Weighted Average Rate (Dollars in Thousands) Short term: Repurchase agreement $ 10,503 3.99 % $ 8,155 3.52 % Federal Home Loan Bank, Chicago advances 55,000 1.25 % 65,000 0.61 % Long term: Federal Home Loan Bank, Chicago advances maturing: 2017 65,000 3.19 % 65,000 3.19 % 2018 65,000 2.97 % 65,000 2.97 % 2021 100,000 0.78 % 100,000 0.78 % 2027 125,000 1.23 % - 0.00 % Repurchase agreements maturing 2017 15,000 2.89 % 84,000 3.96 % $ 435,503 1.81 % $ 387,155 2.27 % The short-term repurchase agreement represents the outstanding portion of a total $35.0 million commitment with one unrelated bank. The short-term repurchase agreement is utilized by Waterstone Mortgage Corporation to finance loans originated for sale. This agreement is secured by the underlying loans being financed. Related interest rates are based upon the note rate associated with the loans being financed. The short-term repurchase agreement had a $10.5 million balance at September 30, 2017 and a $8.2 million balance at December 31, 2016. The $55.0 million in short-term advances consists of one $35.0 million short-term advance that has a maturity date of March 15, 2018 and a fixed rate of 1.28% and one $20.0 million short-term advance that has a maturity date of October 4, 2017 and a fixed rate of 1.20%. The $65.0 million in advances due in 2017 consists of three advances with fixed rates ranging from 3.09% to 3.46% callable quarterly until maturity. The $65.0 million in advances due in 2018 consists of three advances with fixed rates ranging from 2.73% to 3.11% callable quarterly until maturity. The $100.0 million in advances due in 2021 consists of two advances totaling $50.0 million with fixed rates ranging from 0.67% to 0.73% with a FHLB quarterly call option beginning in June 2018 and one advance for $50.0 million with a fixed rate of 0.85% with a FHLB quarterly call option beginning in September 2018. The $125.0 million in advances due in 2027 consists of one $50.0 million advance with a fixed rate of 1.24% with a FHLB single call option in May 2019, one $50.0 million advance with a fixed rate of 1.23% with a FHLB single call option in June 2019, and one $25.0 million advance with a fixed rate of 1.23% with a FHLB single call option in August 2019. The $15.0 million repurchase agreement has a fixed rate of 2.89% callable quarterly until its maturity in 2017. The repurchase agreement is collateralized by securities available for sale with an estimated fair value of $25.6 million at September 30, 2017 and $93.2 million at December 31, 2016. The Company selects loans that meet underwriting criteria established by the FHLBC as collateral for outstanding advances. The Company's borrowings from the FHLBC are limited to 79% of the carrying value of unencumbered one- to four-family mortgage loans, 75% of the carrying value of home equity loans and 51% of the carrying value of multi-family loans. In addition, these advances were collateralized by FHLBC stock of $18.5 million at September 30, 2017 and $13.3 million at December 31, 2016. In the event of prepayment, the Company is obligated to pay all remaining contractual interest on the advance.

Regulatory Capital

Regulatory Capital	9 Months Ended
	Sep. 30, 2017
Regulatory Capital [Abstract]
Regulatory Capital	Note 8 – Regulatory Capital The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements, or overall financial performance deemed by the regulators to be inadequate, can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company's financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of the Company's and Bank's assets, liabilities, and certain off-balance-sheet items, as calculated under regulatory accounting practices. The Company's and Bank's capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. The Federal Reserve Board and the Federal Deposit Insurance Corporation (FDIC) issued final rules implementing the Basel III regulatory capital framework and related Dodd-Frank Wall Street Reform and Consumer Protection Act changes. The rules revise minimum capital requirements and adjust prompt corrective action thresholds. The final rules revise the regulatory capital elements, add a new common equity Tier I capital ratio, increase the minimum Tier 1 capital ratio requirements and implement a new capital conservation buffer. The rules also permit certain banking organizations to retain, through a one-time election, the existing treatment for accumulated other comprehensive income. The Company and the Bank have made the election to retain the existing treatment for accumulated other comprehensive income. The final rules took effect for the Company and the Bank on January 1, 2015, subject to a transition period for certain parts of the rules. The table below includes the new regulatory capital ratio requirements that became effective on January 1, 2015. Beginning in 2016, an additional capital conservation buffer was added to the minimum requirements for capital adequacy purposes, subject to a three year phase-in period. The capital conservation buffer will be fully phased-in on January 1, 2019 at 2.5%. A banking organization with a conservation buffer of less than 2.5% (or the required phase-in amount in years prior to 2019) will be subject to limitations on capital distributions, including dividend payments and certain discretionary bonus payments to executive officers. At September 30, 2017, the ratios for the Company and the Bank are sufficient to meet the fully phased-in conservation buffer. The actual and required capital amounts and ratios for the Bank as of September 30, 2017 and December 31, 2016 are presented in the table below: September 30, 2017 Actual For Capital Adequacy Purposes Minimum Capital Adequacy with Capital Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars In Thousands) Total Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. $ 425,064 30.70 % $ 110,755 8.00 % $ 128,061 9.25 % $ N/A N/A WaterStone Bank 400,873 28.99 % 110,613 8.00 % 127,896 9.25 % 138,266 10.00 % Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 411,001 29.69 % 83,066 6.00 % 100,372 7.25 % N/A N/A WaterStone Bank 386,810 27.98 % 82,960 6.00 % 100,243 7.25 % 110,613 8.00 % Common Equity Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 411,001 29.69 % 62,300 4.50 % 79,605 5.75 % N/A N/A WaterStone Bank 386,810 27.98 % 62,220 4.50 % 79,503 5.75 % 89,873 6.50 % Tier 1 Capital (to average assets) Consolidated Waterstone Financial, Inc. 411,001 21.90 % 75,054 4.00 % N/A N/A N/A N/A WaterStone Bank 386,810 20.67 % 74,859 4.00 % N/A N/A 93,574 5.00 % State of Wisconsin (to total assets) WaterStone Bank 386,810 20.91 % 110,989 6.00 % N/A N/A N/A N/A December 31, 2016 (Dollars In Thousands) Total Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. $ 426,496 32.23 % $ 105,870 8.00 % $ 114,141 8.625 % $ N/A N/A WaterStone Bank 389,602 29.50 % 105,641 8.00 % 113,895 8.625 % 132,052 10.00 % Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 410,467 31.02 % 79,402 6.00 % 87,673 6.625 % N/A N/A WaterStone Bank 373,573 28.29 % 79,231 6.00 % 87,484 6.625 % 105,641 8.00 % Common Equity Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 410,467 31.02 % 59,552 4.50 % 67,823 5.125 % N/A N/A WaterStone Bank 373,573 28.29 % 59,423 4.50 % 67,676 5.125 % 85,834 6.50 % Tier 1 Capital (to average assets) Consolidated Waterstone Financial, Inc. 410,467 23.20 % 70,760 4.00 % N/A N/A N/A N/A WaterStone Bank 373,573 21.17 % 70,573 4.00 % N/A N/A 88,216 5.00 % State of Wisconsin (to total assets) WaterStone Bank 373,573 20.90 % 107,247 6.00 % N/A N/A N/A N/A

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Taxes [Abstract]
Income Taxes	Note 9 – Income Taxes Income tax expense increased from $12.2 million during the nine months ended September 30, 2016 to $12.4 million for the nine months ended September 30, 2017. This increase was primarily due to the increase in our income before income taxes, which increased from $31.3 million during the nine months ended September 30, 2016 to $35.2 million during the nine months ended September 30, 2017. Income tax expense is recognized on the statement of income during the nine months ended September 30, 2017 at an effective rate of 35.2% of pretax income compared to 39.0% during the nine months ended September 30, 2016. During nine months ended September 30, 2017, the Company recognized a benefit of approximately $827,000 related to stock awards exercised during the year as a result of adopting the new stock compensation accounting standard. During the quarter ended September 30, 2016, the Company incurred a charge related to stock options awarded in 2007. The deferred tax asset established for the stock options was not fully utilized upon exercise, as the deductible compensation recognized was less than the value of the asset established at the time the award vested. A net expense of $564,000 was charged to income tax for the nine months ended September 30, 2016.

Offsetting of Assets and Liabil

Offsetting of Assets and Liabilities	9 Months Ended
	Sep. 30, 2017
Offsetting of Assets and Liabilities [Abstract]
Offsetting of Assets and Liabilities	Note 10 – Offsetting of Assets and Liabilities The Company enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. In addition, the Company enters into agreements under which it sells loans held for sale subject to an obligation to repurchase the same loans. Under these arrangements, the Company may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Company to repurchase the assets. As a result, these repurchase agreements are accounted for as collateralized financing arrangements (i.e., secured borrowings) and not as a sale and subsequent repurchase of assets. The obligation to repurchase the assets is reflected as a liability in the Company's consolidated statements of financial condition, while the securities and loans held for sale underlying the repurchase agreements remain in the respective investment securities and loans held for sale asset accounts. In other words, there is no offsetting or netting of the investment securities or loans held for sale assets with the repurchase agreement liabilities. One of the Company's two short-term repurchase agreements and all of the Company's long-term repurchase agreements are subject to master netting agreements, which set forth the rights and obligations for repurchase and offset. Under the master netting agreement, the Company is entitled to set off the collateral placed with a single counterparty against obligations owed to that counterparty. The following table presents the liabilities subject to an enforceable master netting agreement as of September 30, 2017 and December 31, 2016. Gross Recognized Liabilities Gross Amounts Offset Net Amounts Presented Gross Amounts Not Offset Net Amount (In Thousands) September 30, 2017 Repurchase Agreements Short-term $ 10,503 $ - $ 10,503 $ 10,503 $ - Long-term 15,000 - 15,000 15,000 - $ 25,503 $ - $ 25,503 $ 25,503 $ - December 31, 2016 Repurchase Agreements Short-term $ 8,155 $ - $ 8,155 $ 8,155 $ - Long-term 84,000 - 84,000 84,000 - $ 92,155 $ - $ 92,155 $ 92,155 $ -

Commitments, Off-Balance Sheet

Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities	9 Months Ended
	Sep. 30, 2017
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities [Abstract]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities	Note 11– Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the consolidated statements of financial condition. The contract or notional amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments. September 30, 2017 December 31, 2016 (In Thousands) Financial instruments whose contract amounts represent potential credit risk: Commitments to extend credit under amortizing loans (1) $ 52,948 $ 30,903 Commitments to extend credit under home equity lines of credit (2) 14,724 14,367 Unused portion of construction loans (3) 18,306 21,137 Unused portion of business lines of credit 17,204 15,095 Standby letters of credit 259 333 (1) discussed in the following footnote. (2) (3) Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements of the Company. The Company evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management's credit evaluation of the counter-party. Collateral obtained generally consists of mortgages on the underlying real estate. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The Company holds mortgages on the underlying real estate as collateral supporting those commitments for which collateral is deemed necessary. The Company has determined that there are no probable losses related to commitments to extend credit or the standby letters of credit as of September 30, 2017 and December 31, 2016. In the normal course of business, the Company, or it's subsidiaries, are involved in various legal proceedings. In the opinion of management, any liability resulting from pending proceedings would not be expected to have a material adverse effect on the Company's consolidated financial statements. Herrington v. Waterstone Mortgage Corporation Waterstone Mortgage Corporation is a defendant in a class action lawsuit filed in the United States District Court for the Western District of Wisconsin and subsequently compelled to arbitration before the American Arbitration Association. The plaintiff class alleged that Waterstone Mortgage Corporation violated certain provisions of the Fair Labor Standards Act (FLSA) and failed to pay loan officers consistent with their various employment agreements. On July 5, 2017, the arbitrator issued a final award finding Waterstone Mortgage Corporation liable for unpaid minimum wages, overtime, unreimbursed business expenses, and liquidated damages under the FLSA. The arbitrator awarded damages under the FLSA in the amount of $7.3 million, and attorney's fees and costs in the amount of $3.3 million. While a judgment confirming the arbitrator's award with respect to damages and fees has not yet been issued, if plaintiff prevails on her theories, the Company has estimated that the award, which includes attorney's fees and costs, could be as high as $11.0 million. Waterstone Mortgage Corporation will continue to vigorously defend its interests in this matter, including challenging any findings regarding liability and damages through appropriate post-arbitration motions and appeal processes and seeking to vacate in its entirety any award against the Company. Given the pending legal strategies that are available, we do not believe that it is probable that the plaintiff will ultimately prevail in this litigation, and estimate the low end of the possible range of loss is $0. In accordance with the authoritative guidance in evaluating contingencies, the Company has not recorded an accrual related to this matter. Werner v. Waterstone Mortgage Corporation Waterstone Mortgage Corporation is a defendant in a putative collection action lawsuit that was filed on August 4, 2017 in the United States District Court for the Western District of Wisconsin, Werner et al. v. Waterstone Mortgage Corporation. Plaintiffs allege that Waterstone Mortgage Corporation violated the Fair Labor Standards Act (FLSA) by failing to pay loan officers minimum and overtime wages. The case is in the very early stages of litigation and the Court has yet to decide if the case can proceed as collective action. The Company intends to vigorously defend its interests in this matter and pursue all possible defenses against the claims. Given the early stage of the litigation, the Company is not yet able to make a determination as to the likelihood of an unfavorable outcome in this matter, nor is it able to estimate the range of any possible loss.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2017
Derivative Financial Instruments [Abstract]
Derivative Financial Instruments	Note 12 – Derivative Financial Instruments In connection with its mortgage banking activities, the Company enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Mortgage banking derivatives include interest rate lock commitments provided to customers to fund mortgage loans to be sold in the secondary market and forward commitments for the future delivery of such loans to third party investors. It is the Company's practice to enter into forward commitments for the future delivery of residential mortgage loans when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on its commitments to fund the loans as well as on its portfolio of mortgage loans held for sale. The Company's mortgage banking derivatives have not been designated as hedge relationships. These instruments are used to manage the Company's exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of ASC 815. Changes in the fair value of derivatives not designated in hedging relationships are recorded as a component of mortgage banking income in the Company's consolidated statements of operations. The Company does not use derivatives for speculative purposes. Forward commitments to sell mortgage loans represent commitments obtained by the Company from a secondary market agency to purchase mortgages from the Company at specified interest rates and within specified periods of time. Commitments to sell loans are made to mitigate interest rate risk on interest rate lock commitments to originate loans and loans held for sale. At September 30, 2017, the Company had forward commitments to sell mortgage loans with an aggregate notional amount of approximately $349.3 million and interest rate lock commitments with an aggregate notional amount of approximately $201.8 million. The fair value of the forward commitments to sell mortgage loans at September 30, 2017 included a gain of $604,000 that is reported as a component of other assets on the Company's consolidated statement of financial condition. The fair value of the interest rate locks at September 30, 2017 included a gain of $2.0 million that is reported as a component of other assets on the Company's consolidated statements of financial condition. In determining the fair value of its derivative loan commitments, the Company considers the value that would be generated by the loan arising from exercise of the loan commitment when sold in the secondary mortgage market. That value includes the price that the loan is expected to be sold for in the secondary mortgage market. The fair value of these commitments is recorded on the consolidated statements of financial condition with the changes in fair value recorded as a component of mortgage banking income. Residential mortgage loans sold to others are predominantly conventional residential first lien mortgages. The Company's agreements to sell residential mortgage loans in the normal course of business usually require certain representations and warranties on the underlying loans sold related to credit information, loan documentation and collateral, which if subsequently are untrue or breached, could require the Company to repurchase certain loans affected. The Company has only been required to make insignificant repurchases as a result of breaches of these representations and warranties. The Company's agreements to sell residential mortgage loans also contain limited recourse provisions. The recourse provisions are limited in that the recourse provision ends after certain payment criteria have been met. With respect to these loans, repurchase could be required if defined delinquency issues arose during the limited recourse period. Given that the underlying loans delivered to buyers are predominantly conventional first lien mortgages and that historical experience shows negligible losses and insignificant repurchase activity, management believes that losses and repurchases under the limited recourse provisions will continue to be insignificant.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings (loss) per share	Note 13 – Earnings Per Share Earnings per share are computed using the two-class method. Basic earnings per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the applicable period. Diluted earnings per share is computed by dividing net income by the weighted average number of common shares outstanding adjusted for the dilutive effect of all potential common shares. Presented below are the calculations for basic and diluted earnings per share: Three months ended September 30, Nine months ended September 30, 2017 2016 2017 2016 (In Thousands, except per share amounts) Net income $ 7,389 $ 7,505 $ 22,849 $ 19,133 Net income available to unvested restricted shares - 5 - 12 Net income available to common stockholders $ 7,389 $ 7,500 $ 22,849 $ 19,121 Weighted average shares outstanding 27,532 27,043 27,449 26,976 Effect of dilutive potential common shares 421 386 478 307 Diluted weighted average shares outstanding 27,953 27,429 27,927 27,283 Basic earnings per share $ 0.27 $ 0.28 $ 0.83 $ 0.71 Diluted earnings per share $ 0.26 $ 0.27 $ 0.82 $ 0.70

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 14 – Fair Value Measurements ASC Topic 820, "Fair Value Measurements and Disclosures" defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. This accounting standard applies to reported balances that are required or permitted to be measured at fair value under existing accounting pronouncements. The standard also emphasizes that fair value (i.e., the price that would be received in an orderly transaction that is not a forced liquidation or distressed sale at the measurement date), among other things, is based on exit price versus entry price, should include assumptions about risk such as nonperformance risk in liability fair values, and is a market-based measurement, not an entity-specific measurement. When considering the assumptions that market participants would use in pricing the asset or liability, this accounting standard establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within Levels 1 and 2 of the hierarchy) and the reporting entity's own assumptions about market participant assumptions (unobservable inputs classified within Level 3 of the hierarchy). The fair value hierarchy prioritizes inputs used to measure fair value into three broad levels. Level 1 inputs Level 2 inputs Level 3 inputs In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level input that is significant to the fair value measurement in its entirety. The Company's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability. The following table presents information about our assets recorded in our consolidated statement of financial condition at their fair value on a recurring basis as of September 30, 2017 and December 31, 2016, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. Fair Value Measurements Using September 30, 2017 Level 1 Level 2 Level 3 (In Thousands) Available for sale securities Mortgage-backed securities $ 62,218 $ - $ 62,218 $ - Collateralized mortgage obligations Government sponsored enterprise issued 54,660 - 54,660 - Government sponsored enterprise bonds 2,499 - 2,499 - Municipal securities 65,662 - 65,662 - Other debt securities 14,574 - 14,574 - Certificates of deposit 1,227 - 1,227 - Loans held for sale 175,137 - 175,137 - Mortgage banking derivative assets 2,572 - - 2,572 Fair Value Measurements Using December 31, 2016 Level 1 Level 2 Level 3 (In Thousands) Available for sale securities Mortgage-backed securities $ 73,413 $ - $ 73,413 $ - Collateralized mortgage obligations Government sponsored enterprise issued 62,002 - 62,002 - Government sponsored enterprise bonds 2,503 - 2,503 - Municipal securities 70,696 - 70,696 - Other debt securities 16,950 2,541 14,409 - Certificates of deposit 1,231 - 1,231 - Loans held for sale 225,248 - 225,248 - Mortgage banking derivative assets 3,403 - - 3,403 Mortgage banking derivative liabilities 69 - - 69 The following summarizes the valuation techniques for assets recorded in our consolidated statements of financial condition at their fair value on a recurring basis: Available for sale securities – The Company's investment securities classified as available for sale include: mortgage-backed securities, collateralized mortgage obligations, government sponsored enterprise bonds, municipal securities and other debt securities. The fair value of mortgage-backed securities, collateralized mortgage obligations and government sponsored enterprise bonds are determined by a third party valuation source using observable market data utilizing a matrix or multi-dimensional relational pricing model. Standard inputs to these models include observable market data such as benchmark yields, reported trades, broker quotes, issuer spreads, benchmark securities, prepayment models and bid/offer market data. For securities with an early redemption feature, an option adjusted spread model is utilized to adjust the issuer spread. These model and matrix measurements are classified as Level 2 in the fair value hierarchy. The fair value of municipal securities is determined by a third party valuation source using observable market data utilizing a multi-dimensional relational pricing model. Standard inputs to this model include observable market data such as benchmark yields, reported trades, broker quotes, rating updates and issuer spreads. These model measurements are classified as Level 2 in the fair value hierarchy. The fair value of other debt securities, which includes a trust preferred security issued by a financial institution, is determined through quoted prices in active markets and is classified as Level 1 in the fair value hierarchy. Loans held for sale – The Company carries loans held for sale at fair value under the fair value option model. Fair value is generally determined by estimating a gross premium or discount, which is derived from pricing currently observable in the secondary market, principally from observable prices for forward sale commitments. Loans held-for-sale are considered to be Level 2 in the fair value hierarchy of valuation techniques. Mortgage banking derivatives - Mortgage banking derivatives include interest rate lock commitments to originate residential loans held for sale to individual customers and forward commitments to sell residential mortgage loans to various investors. The Company utilizes a valuation model to estimate the fair value of its interest rate lock commitments to originate residential mortgage loans held for sale, which includes applying a pull through rate based upon historical experience and the current interest rate environment and then multiplying by quoted investor prices. The Company also utilizes a valuation model to estimate the fair value of its forward commitments to sell residential loans, which includes matching specific terms and maturities of the forward commitments against applicable investor pricing available. While there are Level 2 and 3 inputs used in the valuation models, the Company has determined that one or more of the inputs significant in the valuation of both of the mortgage banking derivatives fall within Level 3 of the fair value hierarchy. The table below presents reconciliation for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during 2017 and 2016. Mortgage banking derivatives, net (In Thousands) Balance at December 31, 2015 $ 2,188 Mortgage derivative gain, net 1,146 Balance at December 31, 2016 $ 3,334 Mortgage derivative loss, net (762 ) Balance at September 30, 2017 $ 2,572 There were no transfers in or out of Level 1, 2 or 3 measurements during the periods. Assets Recorded at Fair Value on a Non-recurring Basis The following tables present information about our assets recorded in our consolidated statement of financial condition at their fair value on a non-recurring basis as of September 30, 2017 and December 31, 2016, and indicate the fair value hierarchy of the valuation techniques utilized to determine such fair value. Fair Value Measurements Using September 30, 2017 Level 1 Level 2 Level 3 (In Thousands) Impaired loans, net (1) $ 1,452 $ - $ - $ 1,452 Real estate owned 4,568 - - 4,568 Fair Value Measurements Using December 31, 2016 Level 1 Level 2 Level 3 (In Thousands) Impaired loans, net (1) $ 2,814 $ - $ - $ 2,814 Real estate owned 6,118 - - 6,118 (1) Represents collateral-dependent impaired loans, net, which are included in loans. Loans – We do not record loans at fair value on a recurring basis. On a non-recurring basis, loans determined to be impaired are analyzed to determine whether a collateral shortfall exists, and if such a shortfall exists, are recorded on our consolidated statements of financial condition at net realizable value of the underlying collateral. Fair value is determined based on third party appraisals. Appraised values are adjusted to consider disposition costs and also to take into consideration the age of the most recent appraisal. Given the significance of the adjustments made to appraised values necessary to estimate the fair value of impaired loans, loans that have been deemed to be impaired are considered to be Level 3 in the fair value hierarchy of valuation techniques. At September 30, 2017, loans determined to be impaired with an outstanding balance of $1.8 million were carried net of specific reserves of $313,000 for a fair value of $1.5 million. At December 31, 2016, loans determined to be impaired with an outstanding balance of $3.5 million were carried net of specific reserves of $662,000 for a fair value of $2.8 million. Impaired loans collateralized by assets which are valued in excess of the net investment in the loan do not require any specific reserves. Real estate owned – On a non-recurring basis, real estate owned, is recorded in our consolidated statements of financial condition at the lower of cost or fair value. Fair value is determined based on third party appraisals and, if less than the carrying value of the foreclosed loan, the carrying value of the real estate owned is adjusted to the fair value. Appraised values are adjusted to consider disposition costs and also to take into consideration the age of the most recent appraisal. Given the significance of the adjustments made to appraised values necessary to estimate the fair value of the properties, real estate owned is considered to be Level 3 in the fair value hierarchy of valuation techniques. Changes in the value of real estate owned totaled $504,000 and $416,000 during the nine months ended September 30, 2017 and 2016, respectively and are recorded in real estate owned expense. At September 30, 2017 and December 31, 2016, real estate owned totaled $4.6 million and $6.1 million, respectively. Mortgage servicing rights – The Company utilizes an independent valuation from a third party which uses a discounted cash flow model to estimate the fair value of mortgage servicing rights. The model utilizes prepayment assumptions to project cash flows related to the mortgage servicing rights based upon the current interest rate environment, which is then discounted to estimate an expected fair value of the mortgage servicing rights. The model considers characteristics specific to the underlying mortgage portfolio, such as: contractually specified servicing fees, prepayment assumptions, delinquency rates, late charges and costs to service. Given the significance of the unobservable inputs utilized in the estimation process, mortgage servicing rights are classified as Level 3 within the fair value hierarchy. The Company records the mortgage servicing rights at the lower of amortized cost or fair value. At and , there were no impairment identified for mortgage servicing rights. For Level 3 assets and liabilities measured at fair value on a recurring or non-recurring basis as of September 30, 2017, the significant unobservable inputs used in the fair value measurements were as follows: Significant Unobservable Input Value Fair Value at September 30, 2017 Valuation Technique Significant Unobservable Inputs Minimum Value Maximum Value Mortgage banking derivatives $ 2,572 Pricing models Pull through rate 65.3 % 99.8 % Impaired loans 1,452 Market approach Discount rates applied to appraisals 15.0 % 35.0 % Real estate owned 4,568 Market approach Discount rates applied to appraisals 15.0 % 85.7 % The significant unobservable input used in the fair value measurement of the Company's mortgage banking derivatives, including interest rate lock commitments, is the loan pull through rate. This represents the percentage of loans currently in a lock position which the Company estimates will ultimately close. Generally, the fair value of an interest rate lock commitment will be positively (negatively) impacted when the prevailing interest rate is lower (higher) than the interest rate lock commitment. Generally, an increase in the pull through rate will result in the fair value of the interest rate lock increasing when in a gain position, or decreasing when in a loss position. The pull through rate is largely dependent on the loan processing stage that a loan is currently in and the change in prevailing interest rates from the time of the rate lock. The pull through rate is computed using historical data and the ratio is periodically reviewed by the Company. The significant unobservable inputs used in the fair value measurement of collateral for collateral-dependent impaired loans and real estate owned included in the above table primarily relate to discounting criteria applied to independent appraisals received with respect to the collateral. Discounts applied to the appraisals are dependent on the vintage of the appraisal as well as the marketability of the property. The discount factor is computed using actual realization rates on properties that have been foreclosed upon and liquidated in the open market. The significant unobservable inputs used in the fair value measurement of mortgage servicing rights include the prepayment rate, discount rate and cost to service. The prepayment rate represents the assumed rate of prepayment of the outstanding principal balance of the underlying mortgage notes. Significant increases (decreases) in any of those inputs in isolation could result in a significantly lower (higher) fair value measurement. Although the prepayment rate and discount rate are not directly interrelated, they will generally move in opposite directions. Fair value information about financial instruments follows, whether or not recognized in the consolidated statements of financial condition, for which it is practicable to estimate that value. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument. Certain financial instruments and all nonfinancial instruments are excluded from its disclosure requirements. Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company. The carrying amounts and fair values of the Company's financial instruments consist of the following: September 30, 2017 December 31, 2016 Carrying amount Fair Value Carrying amount Fair Value Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 (In Thousands) Financial Assets Cash and cash equivalents $ 92,591 $ 92,591 $ 74,491 $ 18,100 $ - $ 47,217 $ 47,217 $ 34,967 $ 12,250 $ - Securities available-for-sale 200,840 200,840 - 200,840 - 226,795 226,795 2,541 224,254 - Loans held for sale 175,137 175,137 - 175,137 - 225,248 225,248 - 225,248 - Loans receivable 1,261,160 1,284,340 - - 1,284,340 1,177,884 1,212,967 - - 1,212,967 FHLB stock 18,450 18,450 - 18,450 - 13,275 13,275 - 13,275 - Accrued interest receivable 4,575 4,575 4,575 - - 4,281 4,281 4,281 - - Mortgage servicing rights 718 867 - - 867 2,260 3,232 - - 3,232 Mortgage banking derivative assets 2,572 2,572 - - 2,572 3,403 3,403 - - 3,403 Financial Liabilities Deposits 956,773 956,710 271,740 684,970 - 949,411 949,825 282,827 666,998 - Advance payments by borrowers for taxes 25,107 25,107 25,107 - - 4,716 4,716 4,716 - - Borrowings 435,503 435,398 - 435,398 - 387,155 390,932 - 390,932 - Accrued interest payable 918 918 918 - - 916 916 916 - - Mortgage banking derivative liabilities - - - - - 69 69 - - 69 The following methods and assumptions were used by the Company in determining its fair value disclosures for financial instruments. Cash and Cash Equivalents The carrying amount reported in the consolidated statements of financial condition for cash and cash equivalents is a reasonable estimate of fair value. Securities The fair value of securities is generally determined by a third party valuation source using observable market data utilizing a matrix or multi-dimensional relational pricing model. Standard inputs to these models include observable market data such as benchmark yields, reported trades, broker quotes, issuer spreads, benchmark securities and bid/offer market data. For securities with an early redemption feature, an option adjusted spread model is utilized to adjust the issuer spread. Prepayment models are used for mortgage related securities with prepayment features. Loans Held for Sale Fair value is estimated using the prices of the Company's existing commitments to sell such loans and/or the quoted market price for commitments to sell similar loans. Loans Receivable Loans determined to be impaired are analyzed to determine whether a collateral shortfall exists, and if such a shortfall exists, are recorded on our consolidated statements of financial condition at fair value. Fair value is determined based on third party appraisals. Appraised values are adjusted to consider disposition costs and also to take into consideration the age of the most recent appraisal. With respect to loans that are not considered to be impaired, fair value is estimated by discounting the future contractual cash flows using discount rates that reflect a current rate offered to borrowers of similar credit standing for the remaining term to maturity. This method of estimating fair value does not incorporate the exit-price concept of fair value prescribed by ASC 820-10 and generally produces a higher fair value. FHLB Stock For FHLB stock, the carrying amount is the amount at which shares can be redeemed with the FHLB and is a reasonable estimate of fair value. Deposits and Advance Payments by Borrowers for Taxes The fair values for interest-bearing and noninterest-bearing negotiable order of withdrawal accounts, savings accounts, and money market accounts are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). The fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates of similar remaining maturities to a schedule of aggregated expected monthly maturities of the outstanding certificates of deposit. The advance payments by borrowers for taxes are equal to their carrying amounts at the reporting date. Borrowings Fair values for borrowings are estimated using a discounted cash flow calculation that applies current interest rates to estimated future cash flows of the borrowings. Accrued Interest Payable and Accrued Interest Receivable For accrued interest payable and accrued interest receivable, the carrying amount is a reasonable estimate of fair value. Commitments to Extend Credit and Standby Letters of Credit Commitments to extend credit and standby letters of credit are generally not marketable. Furthermore, interest rates on any amounts drawn under such commitments would be generally established at market rates at the time of the draw. Fair values for the Company's commitments to extend credit and standby letters of credit are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements, the counterparty's credit standing, and discounted cash flow analyses. The fair value of the Company's commitments to extend credit was not material at September 30, 2017 and December 31, 2016. Mortgage Banking Derivative Assets and Liabilities Mortgage banking derivatives include interest rate lock commitments to originate residential loans held for sale to individual customers and forward commitments to sell residential mortgage loans to various investors. The Company relies on a valuation model to estimate the fair value of its interest rate lock commitments to originate residential mortgage loans held for sale, which includes applying a pull through rate based upon historical experience and the current interest rate environment, and then multiplying by quoted investor prices. The Company also relies on a valuation model to estimate the fair value of its forward commitments to sell residential loans, which includes matching specific terms and maturities of the forward commitments against applicable investor pricing available. On the Company's Consolidated Statements of Condition, instruments that have a positive fair value are included in prepaid expenses and other assets, and those instruments that have a negative fair value are included in other liabilities.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segments and Related Information	Note 15 – Segment Reporting Selected financial and descriptive information is required to be provided about reportable operating segments, considering a "management approach" concept as the basis for identifying reportable segments. The management approach is based on the way that management organizes the segments within the enterprise for making operating decisions, allocating resources, and assessing performance. Consequently, the segments are evident from the structure of the enterprise's internal organization, focusing on financial information that an enterprise's chief operating decision-makers use to make decisions about the enterprise's operating matters. The Company has determined that it has two reportable segments: community banking and mortgage banking. The Company's operating segments are presented based on its management structure and management accounting practices. The structure and practices are specific to the Company and therefore, the financial results of the Company's business segments are not necessarily comparable with similar information for other financial institutions. Community Banking The community banking segment provides consumer and business banking products and services to customers primarily within Southeastern Wisconsin along with a loan production office in Minneapolis, Minnesota. Within this segment, the following products and services are provided: (1) lending solutions such as residential mortgages, home equity loans and lines of credit, personal and installment loans, real estate financing, business loans, and business lines of credit; (2) deposit and transactional solutions such as checking, credit, debit and pre-paid cards, online banking and bill pay, and money transfer services; (3) investable funds solutions such as savings, money market deposit accounts, IRA accounts, certificates of deposit, and (4) fixed and variable annuities, insurance as well as trust and investment management accounts. Consumer products include loan and deposit products: mortgage, home equity loans and lines, personal term loans, demand deposit accounts, interest bearing transaction accounts and time deposits. Consumer products also include personal investment services. Business banking products include secured and unsecured lines and term loans for working capital, inventory and general corporate use, commercial real estate construction loans, demand deposit accounts, interest bearing transaction accounts and time deposits. Mortgage Banking The mortgage banking segment provides residential mortgage loans for the primary purpose of sale on the secondary market. Mortgage banking products and services are provided by offices in 24 states. As of or for the three months ended September 30, 2017 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income (loss) $ 13,120 $ (102 ) $ 15 $ 13,033 Provision for loan losses - 20 - 20 Net interest income (loss) after provision for loan losses 13,120 (122 ) 15 13,013 Noninterest income 1,161 32,318 (425 ) 33,054 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 4,483 21,792 (122 ) 26,153 Occupancy, office furniture and equipment 733 1,800 - 2,533 FDIC insurance premiums 129 - - 129 Real estate owned (20 ) - - (20 ) Other 1,499 4,290 (268 ) 5,521 Total noninterest expenses 6,824 27,882 (390 ) 34,316 Income (loss) before income taxes 7,457 4,314 (20 ) 11,751 Income tax expense (benefit) 2,597 1,767 (2 ) 4,362 Net income (loss) $ 4,860 $ 2,547 $ (18 ) $ 7,389 Total assets $ 1,859,494 $ 203,826 $ (209,192 ) $ 1,854,128 As of or for the three months ended September 30, 2016 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income $ 11,244 $ 10 $ 71 $ 11,325 Provision for loan losses 100 35 - 135 Net interest income (loss) after provision for loan losses 11,144 (25 ) 71 11,190 Noninterest income 1,658 36,124 (370 ) 37,412 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 4,392 23,295 (114 ) 27,573 Occupancy, office furniture and equipment 740 1,579 - 2,319 FDIC insurance premiums 140 - - 140 Real estate owned 37 - - 37 Other 1,252 4,453 (233 ) 5,472 Total noninterest expenses 6,561 29,327 (347 ) 35,541 Income before income taxes 6,241 6,772 48 13,061 Income tax expense 2,107 2,767 682 5,556 Net income (loss) $ 4,134 $ 4,005 $ (634 ) $ 7,505 Total assets $ 1,777,014 $ 259,636 $ (241,615 ) $ 1,795,035 As of or for the nine months ended September 30, 2017 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income $ 37,233 $ 23 $ 153 $ 37,409 Provision for loan losses (1,300 ) 134 - (1,166 ) Net interest income (loss) after provision for loan losses 38,533 (111 ) 153 38,575 Noninterest income 2,968 94,446 (1,182 ) 96,232 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 12,964 61,134 (366 ) 73,732 Occupancy, office furniture and equipment 2,356 5,231 - 7,587 FDIC insurance premiums 366 - - 366 Real estate owned 258 - - 258 Other 4,382 13,934 (698 ) 17,618 Total noninterest expenses 20,326 80,299 (1,064 ) 99,561 Income before income taxes 21,175 14,036 35 35,246 Income tax expense 6,658 5,716 23 12,397 Net income $ 14,517 $ 8,320 $ 12 $ 22,849 As of or for the nine months ended September 30, 2016 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income $ 30,977 $ 287 $ 209 $ 31,473 Provision for loan losses 200 140 - 340 Net interest income after provision for loan losses 30,777 147 209 31,133 Noninterest income 3,583 92,457 (832 ) 95,208 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 12,784 58,526 (342 ) 70,968 Occupancy, office furniture and equipment 2,388 4,686 - 7,074 FDIC insurance premiums 500 - - 500 Real estate owned 344 - - 344 Other 3,705 12,790 (387 ) 16,108 Total noninterest expenses 19,721 76,002 (729 ) 94,994 Income before income taxes 14,639 16,602 106 31,347 Income tax expense 4,711 6,797 706 12,214 Net income (loss) $ 9,928 $ 9,805 $ (600 ) $ 19,133

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2017
Basis of Presentation [Abstract]
Basis of presentation	The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles ("GAAP") for interim financial information, Rule 10-01 of Regulation S-X and the instructions to Form 10-Q. The financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly the financial position, results of operations, changes in shareholders' equity, and cash flows of the Company for the periods presented.
Use of estimates	The preparation of the unaudited consolidated financial statements requires management of the Company to make a number of estimates and assumptions relating to the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. Significant items subject to such estimates and assumptions include the allowance for loan losses, deferred income taxes and real estate owned. Actual results could differ from those estimates. Certain prior period amounts have been reclassified to conform to current period presentation. These reclassifications did not result in any changes to previously reported net income or shareholders' equity. Impact of Recent Accounting Pronouncements Accounting Standards Codification (ASC) Topic 606 "Revenue from Contracts with Customers." ASC Topic 825 "Financial Instruments." ASC Topic 842 "Leases." ASC Topic 718 "Compensation - Stock Compensation." ASC Topic 326 "Financial Instruments - Credit Losses." ASC Topic 310 "Receivables - Nonrefundable Fees and Other Costs."

Securities Available for Sale (

Securities Available for Sale (Policies)	9 Months Ended
	Sep. 30, 2017
Securities Available for Sale [Abstract]
Impairment of investment securities	The Company reviews the investment securities portfolio on a quarterly basis to monitor its exposure to other-than-temporary impairment. In evaluating whether a security's decline in market value is other-than-temporary, management considers the length of time and extent to which the fair value has been less than cost, the financial condition of the issuer and the underlying obligors, quality of credit enhancements, volatility of the fair value of the security, the expected recovery period of the security and ratings agency evaluations. In addition, the Company may also evaluate payment structure, whether there are defaulted payments or expected defaults, prepayment speeds and the value of any underlying collateral.

Derivative Financial Instrume27

Derivative Financial Instruments (Policies)	9 Months Ended
	Sep. 30, 2017
Derivative Financial Instruments [Abstract]
Derivative financial instruments	In connection with its mortgage banking activities, the Company enters into derivative financial instruments as part of its strategy to manage its exposure to changes in interest rates. Mortgage banking derivatives include interest rate lock commitments provided to customers to fund mortgage loans to be sold in the secondary market and forward commitments for the future delivery of such loans to third party investors. It is the Company's practice to enter into forward commitments for the future delivery of residential mortgage loans when interest rate lock commitments are entered into in order to economically hedge the effect of future changes in interest rates on its commitments to fund the loans as well as on its portfolio of mortgage loans held for sale. The Company's mortgage banking derivatives have not been designated as hedge relationships. These instruments are used to manage the Company's exposure to interest rate movements and other identified risks but do not meet the strict hedge accounting requirements of ASC 815. Changes in the fair value of derivatives not designated in hedging relationships are recorded as a component of mortgage banking income in the Company's consolidated statements of operations. The Company does not use derivatives for speculative purposes. Forward commitments to sell mortgage loans represent commitments obtained by the Company from a secondary market agency to purchase mortgages from the Company at specified interest rates and within specified periods of time. Commitments to sell loans are made to mitigate interest rate risk on interest rate lock commitments to originate loans and loans held for sale. At September 30, 2017, the Company had forward commitments to sell mortgage loans with an aggregate notional amount of approximately $349.3 million and interest rate lock commitments with an aggregate notional amount of approximately $201.8 million. The fair value of the forward commitments to sell mortgage loans at September 30, 2017 included a gain of $604,000 that is reported as a component of other assets on the Company's consolidated statement of financial condition. The fair value of the interest rate locks at September 30, 2017 included a gain of $2.0 million that is reported as a component of other assets on the Company's consolidated statements of financial condition. In determining the fair value of its derivative loan commitments, the Company considers the value that would be generated by the loan arising from exercise of the loan commitment when sold in the secondary mortgage market. That value includes the price that the loan is expected to be sold for in the secondary mortgage market. The fair value of these commitments is recorded on the consolidated statements of financial condition with the changes in fair value recorded as a component of mortgage banking income. Residential mortgage loans sold to others are predominantly conventional residential first lien mortgages. The Company's agreements to sell residential mortgage loans in the normal course of business usually require certain representations and warranties on the underlying loans sold related to credit information, loan documentation and collateral, which if subsequently are untrue or breached, could require the Company to repurchase certain loans affected. The Company has only been required to make insignificant repurchases as a result of breaches of these representations and warranties. The Company's agreements to sell residential mortgage loans also contain limited recourse provisions. The recourse provisions are limited in that the recourse provision ends after certain payment criteria have been met. With respect to these loans, repurchase could be required if defined delinquency issues arose during the limited recourse period. Given that the underlying loans delivered to buyers are predominantly conventional first lien mortgages and that historical experience shows negligible losses and insignificant repurchase activity, management believes that losses and repurchases under the limited recourse provisions will continue to be insignificant.

Securities Available for Sale28

Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2017
Securities Available for Sale [Abstract]
Amortized cost and fair values of investment in securities available for sale	The amortized cost and fair values of the Company's investment in securities available for sale follow: September 30, 2017 Amortized cost Gross unrealized gains Gross unrealized losses Fair value (In Thousands) Mortgage-backed securities $ 61,692 $ 631 $ (105 ) $ 62,218 Collateralized mortgage obligations: Government sponsored enterprise issued 54,949 56 (345 ) 54,660 Mortgage-related securities 116,641 687 (450 ) 116,878 Government sponsored enterprise bonds 2,500 - (1 ) 2,499 Municipal securities 64,100 1,578 (16 ) 65,662 Other debt securities 15,005 61 (492 ) 14,574 Debt securities 81,605 1,639 (509 ) 82,735 Certificates of deposit 1,225 3 (1 ) 1,227 $ 199,471 $ 2,329 $ (960 ) $ 200,840 December 31, 2016 Amortized cost Gross unrealized gains Gross unrealized losses Fair value (In Thousands) Mortgage-backed securities $ 72,858 $ 798 $ (243 ) $ 73,413 Collateralized mortgage obligations: Government sponsored enterprise issued 62,297 70 (365 ) 62,002 Mortgage-related securities 135,155 868 (608 ) 135,415 Government sponsored enterprise bonds 2,500 4 (1 ) 2,503 Municipal securities 70,311 685 (300 ) 70,696 Other debt securities 17,399 154 (603 ) 16,950 Debt securities 90,210 843 (904 ) 90,149 Certificates of deposit 1,225 7 (1 ) 1,231 $ 226,590 $ 1,718 $ (1,513 ) $ 226,795
Amortized cost and fair values of investment securities by contractual maturity	The amortized cost and fair values of investment securities by contractual maturity at September 30, 2017 are shown below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Cost Fair Value (In Thousands) Debt and other securities Due within one year $ 11,214 $ 11,207 Due after one year through five years 20,919 21,116 Due after five years through ten years 36,891 38,178 Due after ten years 13,806 13,461 Mortgage-related securities 116,641 116,878 $ 199,471 $ 200,840
Total proceeds and gross gains and losses from sales of investment securities available for sale	Gross unrealized losses on securities available for sale and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position were as follows: September 30, 2017 Less than 12 months 12 months or longer Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss (In Thousands) Mortgage-backed securities $ 8,547 $ (42 ) $ 3,553 $ (63 ) $ 12,100 $ (105 ) Collateralized mortgage obligations: Government sponsored enterprise issued 33,229 (313 ) 2,188 (32 ) 35,417 (345 ) Government sponsored enterprise bonds 2,499 (1 ) - - 2,499 (1 ) Municipal securities 10,301 (15 ) 101 (1 ) 10,402 (16 ) Other debt securities - - 9,508 (492 ) 9,508 (492 ) Certificates of deposit 489 (1 ) - - 489 (1 ) $ 55,065 $ (372 ) $ 15,350 $ (588 ) $ 70,415 $ (960 ) December 31, 2016 Less than 12 months 12 months or longer Total Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss (In Thousands) Mortgage-backed securities $ 23,433 $ (222 ) $ 1,068 $ (21 ) $ 24,501 $ (243 ) Collateralized mortgage obligations: Government sponsored enterprise issued 39,395 (365 ) - - 39,395 (365 ) Government sponsored enterprise bonds 2,000 (1 ) - - 2,000 (1 ) Municipal securities 32,141 (300 ) - - 32,141 (300 ) Other debt securities - - 9,397 (603 ) 9,397 (603 ) Certificates of deposit 489 (1 ) - - 489 (1 ) $ 97,458 $ (889 ) $ 10,465 $ (624 ) $ 107,923 $ (1,513 )

Loans Receivable (Tables)

Loans Receivable (Tables)	9 Months Ended
	Sep. 30, 2017
Loan Receivable [Abstract]
Schedule of Components of Loans Receivable	Loans receivable at September 30, 2017 and December 31, 2016 are summarized as follows: September 30, 2017 December 31, 2016 (In Thousands) Mortgage loans: Residential real estate: One- to four-family $ 427,195 $ 392,817 Multi-family 580,134 558,592 Home equity 21,606 21,778 Construction and land 16,451 18,179 Commercial real estate 181,328 159,401 Consumer 266 319 Commercial loans 34,180 26,798 $ 1,261,160 $ 1,177,884 The Company provides several types of loans to its customers, including residential, construction, commercial and consumer loans. Significant loan concentrations are considered to exist for a financial institution when there are amounts loaned to one borrower or to multiple borrowers engaged in similar activities that would cause them to be similarly impacted by economic or other conditions. While the Company's credit risks are geographically concentrated in the Milwaukee metropolitan area, there are no concentrations with individual or groups of related borrowers. Qualifying loans receivable totaling $950.7 million and $911.9 million at September 30, 2017 and December 31, 2016, respectively, are pledged as collateral against $410.0 million and $295.0 million in outstanding Federal Home Loan Bank of Chicago (FHLBC) advances under a blanket security agreement at September 30, 2017 and December 31, 2016. Certain of the Company's executive officers, directors, employees, and their related interests have loans with the Bank. As of September 30, 2017 and December 31, 2016, loans aggregating approximately $4.7 million and $5.1 million, respectively, were outstanding to such parties. None of these loans were considered impaired as of September 30, 2017 or December 31, 2016. As of September 30, 2017 and December 31, 2016, there were no loans 90 or more days past due and still accruing interest.
Analysis of Past Due Loans Receivable	An analysis of past due loans receivable as of September 30, 2017 and December 31, 2016 follows: As of September 30, 2017 1-59 Days Past Due (1) 60-89 Days Past Due (2) 90 Days or Greater Total Past Due Current (3) Total Loans (In Thousands) Mortgage loans: Residential real estate: One- to four-family $ 1,859 $ 192 $ 4,161 $ 6,212 $ 420,983 $ 427,195 Multi-family 332 - 407 739 579,395 580,134 Home equity 220 - 91 311 21,295 21,606 Construction and land - - 37 37 16,414 16,451 Commercial real estate 1,270 156 181 1,607 179,721 181,328 Consumer - - - - 266 266 Commercial loans 23 - 26 49 34,131 34,180 Total $ 3,704 $ 348 $ 4,903 $ 8,955 $ 1,252,205 $ 1,261,160 As of December 31, 2016 1-59 Days Past Due (1) 60-89 Days Past Due (2) 90 Days or Greater Total Past Due Current (3) Total Loans (In Thousands) Mortgage loans: Residential real estate: One- to four-family $ 2,403 $ 7 $ 4,623 $ 7,033 $ 385,784 $ 392,817 Multi-family 376 - 401 777 557,815 558,592 Home equity 82 - 35 117 21,661 21,778 Construction and land - - - - 18,179 18,179 Commercial real estate - - 203 203 159,198 159,401 Consumer - - - - 319 319 Commercial loans 42 - 27 69 26,729 26,798 Total $ 2,903 $ 7 $ 5,289 $ 8,199 $ 1,169,685 $ 1,177,884 (1) Includes $96,000 and $148,000 at September 30, 2017 and December 31, 2016, respectively, which are on non-accrual status. (2) Includes $24,000 and $- at September 30, 2017 and December 31, 2016, respectively, which are on non-accrual status. (3) Includes $2.0 million and $4.4 million at September 30, 2017 and December 31, 2016, respectively, which are on non-accrual status.
Allowance for Loan Losses	A summary of the activity for the nine months ended September 30, 2017 and 2016 in the allowance for loan losses follows: One- to Four- Family Multi-Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) Nine months ended September 30, 2017 Balance at beginning of period $ 7,164 $ 4,809 $ 364 $ 1,016 $ 1,951 $ 12 $ 713 $ 16,029 Provision (credit) for loan losses (249 ) (396 ) 8 (283 ) (170 ) (2 ) (74 ) (1,166 ) Charge-offs (1,092 ) (92 ) - (14 ) (6 ) - - (1,204 ) Recoveries 200 102 21 80 1 - - 404 Balance at end of period $ 6,023 $ 4,423 $ 393 $ 799 $ 1,776 $ 10 $ 639 $ 14,063 Nine months ended September 30, 2016 Balance at beginning of period $ 7,763 $ 5,000 $ 433 $ 904 $ 1,680 $ 9 $ 396 $ 16,185 Provision (credit) for loan losses 141 23 (25 ) (123 ) 33 3 288 340 Charge-offs (801 ) (488 ) (62 ) (3 ) - - - (1,354 ) Recoveries 246 134 24 58 - - - 462 Balance at end of period $ 7,349 $ 4,669 $ 370 $ 836 $ 1,713 $ 12 $ 684 $ 15,633
Schedule of Allowance for Loan Loss for Loans Evaluated Individually and Collectively For Impairment	A summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class as of September 30, 2017 follows: One- to Four- Family Multi- Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) Allowance related to loans individually evaluated for impairment $ 198 $ - $ 77 $ - $ 38 $ - $ - $ 313 Allowance related to loans collectively evaluated for impairment 5,825 4,423 316 799 1,738 10 639 13,750 Balance at end of period $ 6,023 $ 4,423 $ 393 $ 799 $ 1,776 $ 10 $ 639 $ 14,063 Loans individually evaluated for impairment $ 8,456 $ 833 $ 302 $ 37 $ 472 $ - $ 26 $ 10,126 Loans collectively evaluated for impairment 418,739 579,301 21,304 16,414 180,856 266 34,154 1,251,034 Total gross loans $ 427,195 $ 580,134 $ 21,606 $ 16,451 $ 181,328 $ 266 $ 34,180 $ 1,261,160 A summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class as of December 31, 2016 follows: One- to Four-Family Multi- Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) Allowance related to loans individually evaluated for impairment $ 499 $ - $ 79 $ - $ 83 $ - $ 1 $ 662 Allowance related to loans collectively evaluated for impairment 6,665 4,809 285 1,016 1,868 12 712 15,367 Balance at end of period $ 7,164 $ 4,809 $ 364 $ 1,016 $ 1,951 $ 12 $ 713 $ 16,029 Loans individually evaluated for impairment $ 10,920 $ 3,941 $ 442 $ - $ 718 $ - $ 41 $ 16,062 Loans collectively evaluated for impairment 381,897 554,651 21,336 18,179 158,683 319 26,757 1,161,822 Total gross loans $ 392,817 $ 558,592 $ 21,778 $ 18,179 $ 159,401 $ 319 $ 26,798 $ 1,177,884
Internal Risk Rating of Loans Receivable	The following table presents information relating to the Company's internal risk ratings of its loans receivable as of September 30, 2017 and December 31, 2016: One to Four- Family Multi-Family Home Equity Construction and Land Commercial Real Estate Consumer Commercial Total (In Thousands) At September 30, 2017 Substandard $ 8,899 $ 833 $ 272 $ 37 $ 1,062 $ - $ 1,595 $ 12,698 Watch 7,348 498 199 - 456 - 761 9,262 Pass 410,948 578,803 21,135 16,414 179,810 266 31,824 1,239,200 $ 427,195 $ 580,134 $ 21,606 $ 16,451 $ 181,328 $ 266 $ 34,180 $ 1,261,160 At December 31, 2016 Substandard $ 12,845 $ 1,427 $ 428 $ - $ 717 $ - $ 41 $ 15,458 Watch 10,509 3,975 149 436 1,389 - 3,671 20,129 Pass 369,463 553,190 21,201 17,743 157,295 319 23,086 1,142,297 $ 392,817 $ 558,592 $ 21,778 $ 18,179 $ 159,401 $ 319 $ 26,798 $ 1,177,884
Impaired Loan Receivables	The following tables present data on impaired loans at September 30, 2017 and December 31, 2016. As of or for the Nine Months Ended September 30, 2017 Recorded Investment Unpaid Principal Reserve Cumulative Charge-Offs Average Recorded Investment Interest Paid (In Thousands) Total Impaired with Reserve One- to four-family $ 1,568 $ 1,568 $ 198 $ - $ 1,595 $ 57 Multi-family - - - - - - Home equity 159 159 77 - 165 10 Construction and land - - - - - - Commercial real estate 38 447 38 409 45 - Consumer - - - - - - Commercial - - - - - - 1,765 2,174 313 409 1,805 67 Total Impaired with no Reserve One- to four-family 6,888 8,385 - 1,497 7,409 251 Multi-family 833 1,699 - 866 834 63 Home equity 143 143 - - 147 4 Construction and land 37 51 - 14 45 - Commercial real estate 434 434 - - 436 11 Consumer - - - - - - Commercial 26 26 - - 26 - 8,361 10,738 - 2,377 8,897 329 Total Impaired One- to four-family 8,456 9,953 198 1,497 9,004 308 Multi-family 833 1,699 - 866 834 63 Home equity 302 302 77 - 312 14 Construction and land 37 51 - 14 45 - Commercial real estate 472 881 38 409 481 11 Consumer - - - - - - Commercial 26 26 - - 26 - $ 10,126 $ 12,912 $ 313 $ 2,786 $ 10,702 $ 396 As of or for the Year Ended December 31, 2016 Recorded Investment Unpaid Principal Reserve Cumulative Charge-Offs Average Recorded Investment Interest Paid (In Thousands) Total Impaired with Reserve One- to four-family $ 3,007 $ 3,007 $ 499 $ - $ 3,063 $ 88 Multi-family - - - - - - Home equity 188 188 79 - 198 15 Construction and land - - - - - - Commercial real estate 280 689 83 409 295 15 Consumer - - - - - - Commercial 1 1 1 - 2 - 3,476 3,885 662 409 3,558 118 Total Impaired with no Reserve One- to four-family 7,913 9,245 - 1,332 8,150 401 Multi-family 3,941 4,952 - 1,011 4,005 230 Home equity 254 254 - - 258 9 Construction and land - - - - - - Commercial real estate 438 438 - - 442 13 Consumer - - - - - - Commercial 40 40 - - 46 2 12,586 14,929 - 2,343 12,901 655 Total Impaired One- to four-family 10,920 12,252 499 1,332 11,213 489 Multi-family 3,941 4,952 - 1,011 4,005 230 Home equity 442 442 79 - 456 24 Construction and land - - - - - - Commercial real estate 718 1,127 83 409 737 28 Consumer - - - - - - Commercial 41 41 1 - 48 2 $ 16,062 $ 18,814 $ 662 $ 2,752 $ 16,459 $ 773
Troubled Debt Restructurings on Loan Receivables	The following presents data on troubled debt restructurings: As of September 30, 2017 Accruing Non-accruing Total Amount Number Amount Number Amount Number (Dollars in Thousands) One- to four-family $ 2,747 2 $ 1,204 7 $ 3,951 9 Multi-family - - 833 3 833 3 Home Equity 48 1 - - 48 1 Commercial real estate 291 1 37 1 328 2 $ 3,086 4 $ 2,074 11 $ 5,160 15 As of December 31, 2016 Accruing Non-accruing Total Amount Number Amount Number Amount Number (Dollars in Thousands) One- to four-family $ 3,296 3 $ 2,399 34 $ 5,695 37 Multi-family 2,514 1 1,427 5 3,941 6 Home equity 49 1 97 1 146 2 Commercial real estate 295 1 60 1 355 2 $ 6,154 6 $ 3,983 41 $ 10,137 47
Schedule of Troubled Debt Restructurings by Concession Type	The following presents troubled debt restructurings by concession type: As of September 30, 2017 Performing in accordance with modified terms In Default Total Amount Number Amount Number Amount Number (dollars in thousands) Interest reduction and principal forbearance $ 4,060 9 $ - - $ 4,060 9 Principal forbearance 48 1 - - 48 1 Interest reduction 356 3 696 2 1,052 5 $ 4,464 13 $ 696 2 $ 5,160 15 As of December 31, 2016 Performing in accordance with modified terms In Default Total Amount Number Amount Number Amount Number (dollars in thousands) Interest reduction and principal forbearance $ 8,221 22 $ 761 2 $ 8,982 24 Principal forbearance 49 1 - - 49 1 Interest reduction 1,106 22 - - 1,106 22 $ 9,376 45 $ 761 2 $ 10,137 47 There were no loans modified as troubled debt restructurings for the three months or nine months ended September 30, 2017. There was one home equity loan with a balance of $64,000 modified as a troubled debt restructuring modified during the three and nine months ended September 30, 2016. There were no troubled debt restructurings within the past twelve months for which there was a default during the three or nine months ended September 30, 2017 and September 30, 2016.
Schedule of Loans Receivables, Non Accrual Status	The following table presents data on non-accrual loans as of September 30, 2017 and December 31, 2016: September 30, 2017 December 31, 2016 (Dollars in Thousands) Non-accrual loans: Residential One- to four-family $ 5,709 $ 7,623 Multi-family 833 1,427 Home equity 223 344 Construction and land 37 - Commercial real estate 181 422 Commercial 26 41 Consumer - - Total non-accrual loans $ 7,009 $ 9,857 Total non-accrual loans to total loans receivable 0.56 % 0.84 % Total non-accrual loans to total assets 0.38 % 0.55 %

Real Estate Owned (Tables)

Real Estate Owned (Tables)	9 Months Ended
	Sep. 30, 2017
Real Estate Owned [Abstract]
Summary of real estate owned	Real estate owned is summarized as follows: September 30, 2017 December 31, 2016 (In Thousands) One- to four-family $ 1,021 $ 2,141 Multi-family 169 - Construction and land 4,822 5,082 Commercial real estate 300 300 Total real estate owned 6,312 7,523 Valuation allowance at end of period (1,744 ) (1,405 ) Total real estate owned, net $ 4,568 $ 6,118 The following table presents the activity in the Company's real estate owned: Nine months ended September 30, 2017 2016 (In Thousands) Real estate owned at beginning of the period $ 6,118 9,190 Transferred from loans receivable 1,609 3,442 Sales (net of gains / losses) (2,654 ) (4,762 ) Write downs (504 ) (416 ) Other (1 ) - Real estate owned at the end of the period $ 4,568 7,454 Residential one- to four-family mortgage loans that were in the process of foreclosure were $3.0 million and $3.1 million at September 30, 2017 and December 31, 2016, respectively.

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	9 Months Ended
	Sep. 30, 2017
Mortgage Servicing Rights [Abstract]
Mortgage Servicing Rights Activity	The following table presents the activity in the Company's mortgage servicing rights: Nine months ended September 30, 2017 2016 (In Thousands) Mortgage servicing rights at beginning of the period $ 2,260 $ 1,422 Additions 793 1,486 Amortization (71 ) (412 ) Sales (2,264 ) - Mortgage servicing rights at end of the period 718 2,496 Valuation allowance at end of period - (100 ) Mortgage servicing rights at end of the period, net $ 718 $ 2,396
Estimated Amortization Expense of Mortgage Servicing Rights	The following table shows the estimated future amortization expense for mortgage servicing rights for the periods indicated: Estimate for the period ending December 31: (In Thousands) 2017 $ 25 2018 106 2019 96 2020 86 2021 76 Thereafter 329 Total $ 718

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2017
Deposits [Abstract]
Contractual maturities of time deposits	At September 30, 2017 and December 31, 2016, time deposits with balances greater than $250,000 amounted to $43.6 million and $44.5 million, respectively. A summary of the contractual maturities of time deposits at September 30, 2017 is as follows: (In Thousands) Within one year $ 514,304 More than one to two years 153,213 More than two to three years 13,618 More than three to four years 1,358 More than four through five years 2,540 $ 685,033

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2017
Borrowings [Abstract]
Borrowings	Borrowings consist of the following: September 30, 2017 December 31, 2016 Balance Weighted Average Rate Balance Weighted Average Rate (Dollars in Thousands) Short term: Repurchase agreement $ 10,503 3.99 % $ 8,155 3.52 % Federal Home Loan Bank, Chicago advances 55,000 1.25 % 65,000 0.61 % Long term: Federal Home Loan Bank, Chicago advances maturing: 2017 65,000 3.19 % 65,000 3.19 % 2018 65,000 2.97 % 65,000 2.97 % 2021 100,000 0.78 % 100,000 0.78 % 2027 125,000 1.23 % - 0.00 % Repurchase agreements maturing 2017 15,000 2.89 % 84,000 3.96 % $ 435,503 1.81 % $ 387,155 2.27 %

Regulatory Capital (Tables)

Regulatory Capital (Tables)	9 Months Ended
	Sep. 30, 2017
Regulatory Capital [Abstract]
Actual and required capital amounts and ratios	The actual and required capital amounts and ratios for the Bank as of September 30, 2017 and December 31, 2016 are presented in the table below: September 30, 2017 Actual For Capital Adequacy Purposes Minimum Capital Adequacy with Capital Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio (Dollars In Thousands) Total Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. $ 425,064 30.70 % $ 110,755 8.00 % $ 128,061 9.25 % $ N/A N/A WaterStone Bank 400,873 28.99 % 110,613 8.00 % 127,896 9.25 % 138,266 10.00 % Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 411,001 29.69 % 83,066 6.00 % 100,372 7.25 % N/A N/A WaterStone Bank 386,810 27.98 % 82,960 6.00 % 100,243 7.25 % 110,613 8.00 % Common Equity Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 411,001 29.69 % 62,300 4.50 % 79,605 5.75 % N/A N/A WaterStone Bank 386,810 27.98 % 62,220 4.50 % 79,503 5.75 % 89,873 6.50 % Tier 1 Capital (to average assets) Consolidated Waterstone Financial, Inc. 411,001 21.90 % 75,054 4.00 % N/A N/A N/A N/A WaterStone Bank 386,810 20.67 % 74,859 4.00 % N/A N/A 93,574 5.00 % State of Wisconsin (to total assets) WaterStone Bank 386,810 20.91 % 110,989 6.00 % N/A N/A N/A N/A December 31, 2016 (Dollars In Thousands) Total Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. $ 426,496 32.23 % $ 105,870 8.00 % $ 114,141 8.625 % $ N/A N/A WaterStone Bank 389,602 29.50 % 105,641 8.00 % 113,895 8.625 % 132,052 10.00 % Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 410,467 31.02 % 79,402 6.00 % 87,673 6.625 % N/A N/A WaterStone Bank 373,573 28.29 % 79,231 6.00 % 87,484 6.625 % 105,641 8.00 % Common Equity Tier 1 Capital (to risk-weighted assets) Consolidated Waterstone Financial, Inc. 410,467 31.02 % 59,552 4.50 % 67,823 5.125 % N/A N/A WaterStone Bank 373,573 28.29 % 59,423 4.50 % 67,676 5.125 % 85,834 6.50 % Tier 1 Capital (to average assets) Consolidated Waterstone Financial, Inc. 410,467 23.20 % 70,760 4.00 % N/A N/A N/A N/A WaterStone Bank 373,573 21.17 % 70,573 4.00 % N/A N/A 88,216 5.00 % State of Wisconsin (to total assets) WaterStone Bank 373,573 20.90 % 107,247 6.00 % N/A N/A N/A N/A

Offsetting of Assets and Liab35

Offsetting of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2017
Offsetting of Assets and Liabilities [Abstract]
Repurchase liabilities	The following table presents the liabilities subject to an enforceable master netting agreement as of September 30, 2017 and December 31, 2016. Gross Recognized Liabilities Gross Amounts Offset Net Amounts Presented Gross Amounts Not Offset Net Amount (In Thousands) September 30, 2017 Repurchase Agreements Short-term $ 10,503 $ - $ 10,503 $ 10,503 $ - Long-term 15,000 - 15,000 15,000 - $ 25,503 $ - $ 25,503 $ 25,503 $ - December 31, 2016 Repurchase Agreements Short-term $ 8,155 $ - $ 8,155 $ 8,155 $ - Long-term 84,000 - 84,000 84,000 - $ 92,155 $ - $ 92,155 $ 92,155 $ -

Commitments, Off-Balance Shee36

Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities [Abstract]
Financial Instruments with Off-Balance Sheet Risk	The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the consolidated statements of financial condition. The contract or notional amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments. September 30, 2017 December 31, 2016 (In Thousands) Financial instruments whose contract amounts represent potential credit risk: Commitments to extend credit under amortizing loans (1) $ 52,948 $ 30,903 Commitments to extend credit under home equity lines of credit (2) 14,724 14,367 Unused portion of construction loans (3) 18,306 21,137 Unused portion of business lines of credit 17,204 15,095 Standby letters of credit 259 333 (1) discussed in the following footnote. (2) (3)

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Calculations for basic and diluted earnings loss per share	Presented below are the calculations for basic and diluted earnings per share: Three months ended September 30, Nine months ended September 30, 2017 2016 2017 2016 (In Thousands, except per share amounts) Net income $ 7,389 $ 7,505 $ 22,849 $ 19,133 Net income available to unvested restricted shares - 5 - 12 Net income available to common stockholders $ 7,389 $ 7,500 $ 22,849 $ 19,121 Weighted average shares outstanding 27,532 27,043 27,449 26,976 Effect of dilutive potential common shares 421 386 478 307 Diluted weighted average shares outstanding 27,953 27,429 27,927 27,283 Basic earnings per share $ 0.27 $ 0.28 $ 0.83 $ 0.71 Diluted earnings per share $ 0.26 $ 0.27 $ 0.82 $ 0.70

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Measurements [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured On Recurring Basis	The following table presents information about our assets recorded in our consolidated statement of financial condition at their fair value on a recurring basis as of September 30, 2017 and December 31, 2016, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. Fair Value Measurements Using September 30, 2017 Level 1 Level 2 Level 3 (In Thousands) Available for sale securities Mortgage-backed securities $ 62,218 $ - $ 62,218 $ - Collateralized mortgage obligations Government sponsored enterprise issued 54,660 - 54,660 - Government sponsored enterprise bonds 2,499 - 2,499 - Municipal securities 65,662 - 65,662 - Other debt securities 14,574 - 14,574 - Certificates of deposit 1,227 - 1,227 - Loans held for sale 175,137 - 175,137 - Mortgage banking derivative assets 2,572 - - 2,572 Fair Value Measurements Using December 31, 2016 Level 1 Level 2 Level 3 (In Thousands) Available for sale securities Mortgage-backed securities $ 73,413 $ - $ 73,413 $ - Collateralized mortgage obligations Government sponsored enterprise issued 62,002 - 62,002 - Government sponsored enterprise bonds 2,503 - 2,503 - Municipal securities 70,696 - 70,696 - Other debt securities 16,950 2,541 14,409 - Certificates of deposit 1,231 - 1,231 - Loans held for sale 225,248 - 225,248 - Mortgage banking derivative assets 3,403 - - 3,403 Mortgage banking derivative liabilities 69 - - 69
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The table below presents reconciliation for all assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during 2017 and 2016. Mortgage banking derivatives, net (In Thousands) Balance at December 31, 2015 $ 2,188 Mortgage derivative gain, net 1,146 Balance at December 31, 2016 $ 3,334 Mortgage derivative loss, net (762 ) Balance at September 30, 2017 $ 2,572
Fair Value Measurements, Nonrecurring	The following tables present information about our assets recorded in our consolidated statement of financial condition at their fair value on a non-recurring basis as of September 30, 2017 and December 31, 2016, and indicate the fair value hierarchy of the valuation techniques utilized to determine such fair value. Fair Value Measurements Using September 30, 2017 Level 1 Level 2 Level 3 (In Thousands) Impaired loans, net (1) $ 1,452 $ - $ - $ 1,452 Real estate owned 4,568 - - 4,568 Fair Value Measurements Using December 31, 2016 Level 1 Level 2 Level 3 (In Thousands) Impaired loans, net (1) $ 2,814 $ - $ - $ 2,814 Real estate owned 6,118 - - 6,118 (1) Represents collateral-dependent impaired loans, net, which are included in loans.
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques	For Level 3 assets and liabilities measured at fair value on a recurring or non-recurring basis as of September 30, 2017, the significant unobservable inputs used in the fair value measurements were as follows: Significant Unobservable Input Value Fair Value at September 30, 2017 Valuation Technique Significant Unobservable Inputs Minimum Value Maximum Value Mortgage banking derivatives $ 2,572 Pricing models Pull through rate 65.3 % 99.8 % Impaired loans 1,452 Market approach Discount rates applied to appraisals 15.0 % 35.0 % Real estate owned 4,568 Market approach Discount rates applied to appraisals 15.0 % 85.7 %
Fair Value, by Balance Sheet Grouping	The carrying amounts and fair values of the Company's financial instruments consist of the following: September 30, 2017 December 31, 2016 Carrying amount Fair Value Carrying amount Fair Value Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 (In Thousands) Financial Assets Cash and cash equivalents $ 92,591 $ 92,591 $ 74,491 $ 18,100 $ - $ 47,217 $ 47,217 $ 34,967 $ 12,250 $ - Securities available-for-sale 200,840 200,840 - 200,840 - 226,795 226,795 2,541 224,254 - Loans held for sale 175,137 175,137 - 175,137 - 225,248 225,248 - 225,248 - Loans receivable 1,261,160 1,284,340 - - 1,284,340 1,177,884 1,212,967 - - 1,212,967 FHLB stock 18,450 18,450 - 18,450 - 13,275 13,275 - 13,275 - Accrued interest receivable 4,575 4,575 4,575 - - 4,281 4,281 4,281 - - Mortgage servicing rights 718 867 - - 867 2,260 3,232 - - 3,232 Mortgage banking derivative assets 2,572 2,572 - - 2,572 3,403 3,403 - - 3,403 Financial Liabilities Deposits 956,773 956,710 271,740 684,970 - 949,411 949,825 282,827 666,998 - Advance payments by borrowers for taxes 25,107 25,107 25,107 - - 4,716 4,716 4,716 - - Borrowings 435,503 435,398 - 435,398 - 387,155 390,932 - 390,932 - Accrued interest payable 918 918 918 - - 916 916 916 - - Mortgage banking derivative liabilities - - - - - 69 69 - - 69

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	As of or for the three months ended September 30, 2017 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income (loss) $ 13,120 $ (102 ) $ 15 $ 13,033 Provision for loan losses - 20 - 20 Net interest income (loss) after provision for loan losses 13,120 (122 ) 15 13,013 Noninterest income 1,161 32,318 (425 ) 33,054 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 4,483 21,792 (122 ) 26,153 Occupancy, office furniture and equipment 733 1,800 - 2,533 FDIC insurance premiums 129 - - 129 Real estate owned (20 ) - - (20 ) Other 1,499 4,290 (268 ) 5,521 Total noninterest expenses 6,824 27,882 (390 ) 34,316 Income (loss) before income taxes 7,457 4,314 (20 ) 11,751 Income tax expense (benefit) 2,597 1,767 (2 ) 4,362 Net income (loss) $ 4,860 $ 2,547 $ (18 ) $ 7,389 Total assets $ 1,859,494 $ 203,826 $ (209,192 ) $ 1,854,128 As of or for the three months ended September 30, 2016 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income $ 11,244 $ 10 $ 71 $ 11,325 Provision for loan losses 100 35 - 135 Net interest income (loss) after provision for loan losses 11,144 (25 ) 71 11,190 Noninterest income 1,658 36,124 (370 ) 37,412 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 4,392 23,295 (114 ) 27,573 Occupancy, office furniture and equipment 740 1,579 - 2,319 FDIC insurance premiums 140 - - 140 Real estate owned 37 - - 37 Other 1,252 4,453 (233 ) 5,472 Total noninterest expenses 6,561 29,327 (347 ) 35,541 Income before income taxes 6,241 6,772 48 13,061 Income tax expense 2,107 2,767 682 5,556 Net income (loss) $ 4,134 $ 4,005 $ (634 ) $ 7,505 Total assets $ 1,777,014 $ 259,636 $ (241,615 ) $ 1,795,035 As of or for the nine months ended September 30, 2017 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income $ 37,233 $ 23 $ 153 $ 37,409 Provision for loan losses (1,300 ) 134 - (1,166 ) Net interest income (loss) after provision for loan losses 38,533 (111 ) 153 38,575 Noninterest income 2,968 94,446 (1,182 ) 96,232 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 12,964 61,134 (366 ) 73,732 Occupancy, office furniture and equipment 2,356 5,231 - 7,587 FDIC insurance premiums 366 - - 366 Real estate owned 258 - - 258 Other 4,382 13,934 (698 ) 17,618 Total noninterest expenses 20,326 80,299 (1,064 ) 99,561 Income before income taxes 21,175 14,036 35 35,246 Income tax expense 6,658 5,716 23 12,397 Net income $ 14,517 $ 8,320 $ 12 $ 22,849 As of or for the nine months ended September 30, 2016 Community Banking Mortgage Banking Holding Company and Other Consolidated (In Thousands) Net interest income $ 30,977 $ 287 $ 209 $ 31,473 Provision for loan losses 200 140 - 340 Net interest income after provision for loan losses 30,777 147 209 31,133 Noninterest income 3,583 92,457 (832 ) 95,208 Noninterest expenses: Compensation, payroll taxes, and other employee benefits 12,784 58,526 (342 ) 70,968 Occupancy, office furniture and equipment 2,388 4,686 - 7,074 FDIC insurance premiums 500 - - 500 Real estate owned 344 - - 344 Other 3,705 12,790 (387 ) 16,108 Total noninterest expenses 19,721 76,002 (729 ) 94,994 Income before income taxes 14,639 16,602 106 31,347 Income tax expense 4,711 6,797 706 12,214 Net income (loss) $ 9,928 $ 9,805 $ (600 ) $ 19,133

Securities Available for Sale40

Securities Available for Sale (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)Security	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)Security	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2012USD ($)
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	$ 199,471,000		$ 199,471,000		$ 226,590,000
Gross unrealized gains	2,329,000		2,329,000		1,718,000
Gross unrealized losses	(960,000)		(960,000)		(1,513,000)
Fair Value	200,840,000		200,840,000		226,795,000
Proceeds from sale of securities			448,000
Loss on sale of securities	0	$ 0	107,000	$ 0
Amortized cost of investment securities by contractual maturity [Abstract]
Due within one year	11,214,000		11,214,000
Due after one year through five years	20,919,000		20,919,000
Due after five years through ten years	36,891,000		36,891,000
Due after ten years	13,806,000		13,806,000
Mortgage-related securities	116,641,000		116,641,000
Amortized Cost	199,471,000		199,471,000		226,590,000
Fair value of investment securities by contractual maturity [Abstract]
Due within one year	11,207,000		11,207,000
Due after one year through five years	21,116,000		21,116,000
Due after five years through ten years	38,178,000		38,178,000
Due after ten years	13,461,000		13,461,000
Mortgage-related securities	116,878,000		116,878,000
Fair Value	200,840,000		200,840,000		226,795,000
Fair value of securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months	55,065,000		55,065,000		97,458,000
12 months or longer	15,350,000		15,350,000		10,465,000
Fair value	70,415,000		70,415,000		107,923,000
Unrealized loss on securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months			(372,000)		(889,000)
12 months or longer			(588,000)		(624,000)
Unrealized loss			(960,000)		(1,513,000)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Credit related impairments on securities as of beginning of period			94,000	$ 117,000	117,000
Credit-related impairments related to securities for which an other- than-temporary impairment was not previously recognized			0		0
Increase (decrease) in credit-related impairments related to securities for which an other-than-temporary impairment was previously recognized			0		(23,000)
Additional credit impairments on securities						$ 17,000	$ 77,000
Credit related impairments on securities as of end of period	94,000		94,000		94,000
Amortized Cost	116,000		116,000
Mortgage-Backed Securities [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	61,692,000		61,692,000		72,858,000
Gross unrealized gains	631,000		631,000		798,000
Gross unrealized losses	(105,000)		(105,000)		(243,000)
Fair Value	$ 62,218,000		$ 62,218,000		73,413,000
Number of securities that were other-than-temporarily impaired | Security	4		4
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	$ 61,692,000		$ 61,692,000		72,858,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	62,218,000		62,218,000		73,413,000
Fair value of securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months	8,547,000		8,547,000		23,433,000
12 months or longer	3,553,000		3,553,000		1,068,000
Fair value	12,100,000		12,100,000		24,501,000
Unrealized loss on securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months			(42,000)		(222,000)
12 months or longer			(63,000)		(21,000)
Unrealized loss			(105,000)		(243,000)
Collateralized Mortgage Obligations, Government Sponsored Enterprise Issued [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	54,949,000		54,949,000		62,297,000
Gross unrealized gains	56,000		56,000		70,000
Gross unrealized losses	(345,000)		(345,000)		(365,000)
Fair Value	54,660,000		54,660,000		62,002,000
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	54,949,000		54,949,000		62,297,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	54,660,000		54,660,000		62,002,000
Fair value of securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months	33,229,000		33,229,000		39,395,000
12 months or longer	2,188,000		2,188,000		0
Fair value	35,417,000		35,417,000		39,395,000
Unrealized loss on securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months			(313,000)		(365,000)
12 months or longer			(32,000)		0
Unrealized loss			(345,000)		(365,000)
Mortgage-Related Securities [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	116,641,000		116,641,000		135,155,000
Gross unrealized gains	687,000		687,000		868,000
Gross unrealized losses	(450,000)		(450,000)		(608,000)
Fair Value	116,878,000		116,878,000		135,415,000
Securities pledged as collateral to secure repurchase agreements or related to mortgage banking activities	25,600,000		25,600,000		93,200,000
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	116,641,000		116,641,000		135,155,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	116,878,000		116,878,000		135,415,000
Government-Sponsored Enterprise Bonds [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	2,500,000		2,500,000		2,500,000
Gross unrealized gains	0		0		4,000
Gross unrealized losses	(1,000)		(1,000)		(1,000)
Fair Value	2,499,000		2,499,000		2,503,000
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	2,500,000		2,500,000		2,500,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	2,499,000		2,499,000		2,503,000
Fair value of securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months	2,499,000		2,499,000		2,000,000
12 months or longer	0		0		0
Fair value	2,499,000		2,499,000		2,000,000
Unrealized loss on securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months			(1,000)		(1,000)
12 months or longer			0		0
Unrealized loss			(1,000)		(1,000)
Municipal Securities [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	64,100,000		64,100,000		70,311,000
Gross unrealized gains	1,578,000		1,578,000		685,000
Gross unrealized losses	(16,000)		(16,000)		(300,000)
Fair Value	$ 65,662,000		$ 65,662,000		70,696,000
Number of securities that were in unrealized loss position twelve months or longer | Security	1		1
Securities pledged as collateral to secure repurchase agreements or related to mortgage banking activities	$ 2,700,000		$ 2,700,000		2,400,000
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	64,100,000		64,100,000		70,311,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	65,662,000		65,662,000		70,696,000
Fair value of securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months	10,301,000		10,301,000		32,141,000
12 months or longer	101,000		101,000		0
Fair value	10,402,000		10,402,000		32,141,000
Unrealized loss on securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months			(15,000)		(300,000)
12 months or longer			(1,000)		0
Unrealized loss			(16,000)		(300,000)
Other Debt Securities [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	15,005,000		15,005,000		17,399,000
Gross unrealized gains	61,000		61,000		154,000
Gross unrealized losses	(492,000)		(492,000)		(603,000)
Fair Value	$ 14,574,000		$ 14,574,000		16,950,000
Number of securities that were in unrealized loss position twelve months or longer | Security	1		1
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	$ 15,005,000		$ 15,005,000		17,399,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	14,574,000		14,574,000		16,950,000
Fair value of securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months	0		0		0
12 months or longer	9,508,000		9,508,000		9,397,000
Fair value	9,508,000		9,508,000		9,397,000
Unrealized loss on securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months			0		0
12 months or longer			(492,000)		(603,000)
Unrealized loss			(492,000)		(603,000)
Debt Securities [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	81,605,000		81,605,000		90,210,000
Gross unrealized gains	1,639,000		1,639,000		843,000
Gross unrealized losses	(509,000)		(509,000)		(904,000)
Fair Value	82,735,000		82,735,000		90,149,000
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	81,605,000		81,605,000		90,210,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	82,735,000		82,735,000		90,149,000
Certificates of Deposit [Member]
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	1,225,000		1,225,000		1,225,000
Gross unrealized gains	3,000		3,000		7,000
Gross unrealized losses	(1,000)		(1,000)		(1,000)
Fair Value	1,227,000		1,227,000		1,231,000
Amortized cost of investment securities by contractual maturity [Abstract]
Amortized Cost	1,225,000		1,225,000		1,225,000
Fair value of investment securities by contractual maturity [Abstract]
Fair Value	1,227,000		1,227,000		1,231,000
Fair value of securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months	489,000		489,000		489,000
12 months or longer	0		0		0
Fair value	$ 489,000		489,000		489,000
Unrealized loss on securities available for sale in a continuous unrealized loss position [Abstract]
Less than 12 months			(1,000)		(1,000)
12 months or longer			0		0
Unrealized loss			$ (1,000)		$ (1,000)

Loans Receivable, Part I (Detai

Loans Receivable, Part I (Details) $ in Thousands	Sep. 30, 2017USD ($)Loan	Dec. 31, 2016USD ($)Loan
Mortgage Loans [Abstract]
Loans receivable	$ 1,261,160	$ 1,177,884
Loans receivable pledged as collateral	950,700	911,900
Advances by Federal Home Loan Bank	410,000	295,000
Loans outstanding to related parties	$ 4,700	$ 5,100
Number of loans impaired | Loan	0	0
Residential Real Estate [Member] | One-to-Four Family [Member]
Mortgage Loans [Abstract]
Loans receivable	$ 427,195	$ 392,817
Residential Real Estate [Member] | Multi Family [Member]
Mortgage Loans [Abstract]
Loans receivable	580,134	558,592
Residential Real Estate [Member] | Home Equity [Member]
Mortgage Loans [Abstract]
Loans receivable	21,606	21,778
Construction and Land [Member]
Mortgage Loans [Abstract]
Loans receivable	16,451	18,179
Commercial Real Estate [Member]
Mortgage Loans [Abstract]
Loans receivable	181,328	159,401
Consumer [Member]
Mortgage Loans [Abstract]
Loans receivable	266	319
Commercial Loans [Member]
Mortgage Loans [Abstract]
Loans receivable	$ 34,180	$ 26,798

Loans Receivable, Part II (Deta

Loans Receivable, Part II (Details) - USD ($)		Sep. 30, 2017	Dec. 31, 2016
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		$ 8,955,000	$ 8,199,000
Current	[1]	1,252,205,000	1,169,685,000
Total Loans		1,261,160,000	1,177,884,000
Loan Receivable, Nonaccrual Status		2,000,000	4,400,000
90 or more days past due		0	0
1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	3,704,000	2,903,000
Loan Receivable, Nonaccrual Status		96,000	148,000
60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	348,000	7,000
Loan Receivable, Nonaccrual Status		24,000,000,000	0
Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		4,903,000	5,289,000
Residential Real Estate [Member] | One-to-Four Family [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		6,212,000	7,033,000
Current	[1]	420,983,000	385,784,000
Total Loans		427,195,000	392,817,000
Residential Real Estate [Member] | One-to-Four Family [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	1,859,000	2,403,000
Residential Real Estate [Member] | One-to-Four Family [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	192,000	7,000
Residential Real Estate [Member] | One-to-Four Family [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		4,161,000	4,623,000
Residential Real Estate [Member] | Multi Family [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		739,000	777,000
Current	[1]	579,395,000	557,815,000
Total Loans		580,134,000	558,592,000
Residential Real Estate [Member] | Multi Family [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	332,000	376,000
Residential Real Estate [Member] | Multi Family [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Residential Real Estate [Member] | Multi Family [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		407,000	401,000
Residential Real Estate [Member] | Home Equity [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		311,000	117,000
Current	[1]	21,295,000	21,661,000
Total Loans		21,606,000	21,778,000
Residential Real Estate [Member] | Home Equity [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	220,000	82,000
Residential Real Estate [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Residential Real Estate [Member] | Home Equity [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		91,000	35,000
Construction and Land [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		37,000	0
Current	[1]	16,414,000	18,179,000
Total Loans		16,451,000	18,179,000
Construction and Land [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Construction and Land [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Construction and Land [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		37,000	0
Commercial Real Estate [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		1,607,000	203,000
Current	[1]	179,721,000	159,198,000
Total Loans		181,328,000	159,401,000
Commercial Real Estate [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	1,270,000	0
Commercial Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	156,000	0
Commercial Real Estate [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		181,000	203,000
Consumer [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Current	[1]	266,000	319,000
Total Loans		266,000	319,000
Consumer [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	0	0
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Consumer [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		0	0
Commercial Loans [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		49,000	69,000
Current	[1]	34,131,000	26,729,000
Total Loans		34,180,000	26,798,000
Commercial Loans [Member] | 1 to 59 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[2]	23,000	42,000
Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due	[3]	0	0
Commercial Loans [Member] | Greater than 90 Days Past Due [Member]
Financing receivable, recorded investment, aging [Abstract]
Total Past Due		$ 26,000	$ 27,000
[1]	Includes $1.9 million and $4.4 million at June 30, 2017 and December 31, 2016, respectively, which are on non-accrual status.
[2]	Includes $59,000 and $148,000 at June 30, 2017 and December 31, 2016, respectively, which are on non-accrual status.
[3]	Includes $1.3 million and $- at June 30, 2017 and December 31, 2016, respectively, which are on non-accrual status.

Loans Receivable, Part III (Det

Loans Receivable, Part III (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2016
Allowance for loan losses [Roll Forward]
Balance at beginning of period			$ 16,029	$ 16,185
Provision (credit) for loan losses	$ 20	$ 135	(1,166)	340
Charge-offs			(1,204)	(1,354)
Recoveries			404	462
Balance at end of period	14,063	15,633	14,063	15,633
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					$ 313	$ 662
Allowance related to loans collectively evaluated for impairment					13,750	15,367
Provision for loan losses	14,063	15,633	16,029	16,185	14,063	16,029
Loans individually evaluated for impairment					10,126	16,062
Loans collectively evaluated for impairment					1,251,034	1,161,822
Total gross loans					1,261,160	1,177,884
Total loans					1,261,160	1,177,884
Residential Real Estate [Member] | One-to-Four Family [Member]
Allowance for loan losses [Roll Forward]
Balance at beginning of period			7,164	7,763
Provision (credit) for loan losses			(249)	141
Charge-offs			(1,092)	(801)
Recoveries			200	246
Balance at end of period	6,023	7,349	6,023	7,349
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					198	499
Allowance related to loans collectively evaluated for impairment					5,825	6,665
Provision for loan losses	6,023	7,349	7,164	7,763	6,023	7,164
Loans individually evaluated for impairment					8,456	10,920
Loans collectively evaluated for impairment					418,739	381,897
Total gross loans					427,195	392,817
Total loans					427,195	392,817
Residential Real Estate [Member] | Multi Family [Member]
Allowance for loan losses [Roll Forward]
Balance at beginning of period			4,809	5,000
Provision (credit) for loan losses			(396)	23
Charge-offs			(92)	(488)
Recoveries			102	134
Balance at end of period	4,423	4,669	4,423	4,669
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					0	0
Allowance related to loans collectively evaluated for impairment					4,423	4,809
Provision for loan losses	4,423	4,669	4,809	5,000	4,423	4,809
Loans individually evaluated for impairment					833	3,941
Loans collectively evaluated for impairment					579,301	554,651
Total gross loans					580,134	558,592
Total loans					580,134	558,592
Residential Real Estate [Member] | Home Equity [Member]
Allowance for loan losses [Roll Forward]
Balance at beginning of period			364	433
Provision (credit) for loan losses			8	(25)
Charge-offs			0	(62)
Recoveries			21	24
Balance at end of period	393	370	393	370
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					77	79
Allowance related to loans collectively evaluated for impairment					316	285
Provision for loan losses	393	370	364	433	393	364
Loans individually evaluated for impairment					302	442
Loans collectively evaluated for impairment					21,304	21,336
Total gross loans					21,606	21,778
Total loans					21,606	21,778
Construction and Land [Member]
Allowance for loan losses [Roll Forward]
Balance at beginning of period			1,016	904
Provision (credit) for loan losses			(283)	(123)
Charge-offs			(14)	(3)
Recoveries			80	58
Balance at end of period	799	836	799	836
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					0	0
Allowance related to loans collectively evaluated for impairment					799	1,016
Provision for loan losses	799	836	1,016	904	799	1,016
Loans individually evaluated for impairment					37	0
Loans collectively evaluated for impairment					16,414	18,179
Total gross loans					16,451	18,179
Total loans					16,451	18,179
Commercial Real Estate [Member]
Allowance for loan losses [Roll Forward]
Balance at beginning of period			1,951	1,680
Provision (credit) for loan losses			(170)	33
Charge-offs			(6)	0
Recoveries			1	0
Balance at end of period	1,776	1,713	1,776	1,713
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					38	83
Allowance related to loans collectively evaluated for impairment					1,738	1,868
Provision for loan losses	1,776	1,713	1,951	1,680	1,776	1,951
Loans individually evaluated for impairment					472	718
Loans collectively evaluated for impairment					180,856	158,683
Total gross loans					181,328	159,401
Total loans					181,328	159,401
Consumer [Member]
Allowance for loan losses [Roll Forward]
Balance at beginning of period			12	9
Provision (credit) for loan losses			(2)	3
Charge-offs			0	0
Recoveries			0	0
Balance at end of period	10	12	10	12
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					0	0
Allowance related to loans collectively evaluated for impairment					10	12
Provision for loan losses	10	12	12	9	10	12
Loans individually evaluated for impairment					0	0
Loans collectively evaluated for impairment					266	319
Total gross loans					266	319
Total loans					266	319
Commercial Loans [Member]
Allowance for loan losses [Roll Forward]
Balance at beginning of period			713	396
Provision (credit) for loan losses			(74)	288
Charge-offs			0	0
Recoveries			0	0
Balance at end of period	639	684	639	684
Summary of the allowance for loan loss for loans evaluated individually and collectively for impairment by collateral class [Abstract]
Allowance related to loans individually evaluated for impairment					0	1
Allowance related to loans collectively evaluated for impairment					639	712
Provision for loan losses	$ 639	$ 684	$ 713	$ 396	639	713
Loans individually evaluated for impairment					26	41
Loans collectively evaluated for impairment					34,154	26,757
Total gross loans					34,180	26,798
Total loans					$ 34,180	$ 26,798

Loans Receivable, Part IV (Deta

Loans Receivable, Part IV (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2015	Dec. 31, 2016
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	$ 1,261,160,000		$ 1,177,884,000
Loans requiring an officers' loans committee review and approval, minimum	500,000
Minimum amount of potential loan exposure to be reviewed by credit management personnel	$ 1,000,000
Maximum period of time loan is reviewed if renewed	1 year
Period of time sales of real estate owned fair value is based	2 years
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	$ 1,765,000		3,476,000
Total Impaired, with no Reserve, Recorded Investment	8,361,000		12,586,000
Total Impaired, Recorded Investment	10,126,000		16,062,000
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	2,174,000		3,885,000
Total Impaired with no Reserve, Unpaid Principal Balance	10,738,000		14,929,000
Total Impaired, Unpaid Principal Balance, Total	12,912,000		18,814,000
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	313,000		662,000
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	313,000		662,000
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	409,000		409,000
Total Impaired with no Reserve, Cumulative Charge-offs	2,377,000		2,343,000
Total Impaired, Cumulative Charge-offs	2,786,000		2,752,000
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	1,805,000	$ 3,558,000
Total Impaired with no Reserve, Average Recorded Investment	8,897,000	12,901,000
Total Impaired, Average Recorded Investment, Total	10,702,000	16,459,000
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	67,000	118,000
Total Impaired with no Reserve, Interest Paid YTD	329,000	655,000
Total Impaired, Interest Paid YTD	396,000	773,000
Charge-offs recorded to reduce the unpaid principal balance	2,400,000
Total impaired loans including troubled debt restructurings	5,160,000		10,137,000
Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	12,698,000		15,458,000
Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	9,262,000		20,129,000
Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	1,239,200,000		1,142,297,000
Residential Real Estate [Member] | One-to-Four Family [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	427,195,000		392,817,000
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	1,568,000		3,007,000
Total Impaired, with no Reserve, Recorded Investment	6,888,000		7,913,000
Total Impaired, Recorded Investment	8,456,000		10,920,000
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	1,568,000		3,007,000
Total Impaired with no Reserve, Unpaid Principal Balance	8,385,000		9,245,000
Total Impaired, Unpaid Principal Balance, Total	9,953,000		12,252,000
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	198,000		499,000
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	198,000		499,000
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	0		0
Total Impaired with no Reserve, Cumulative Charge-offs	1,497,000		1,332,000
Total Impaired, Cumulative Charge-offs	1,497,000		1,332,000
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	1,595,000	3,063,000
Total Impaired with no Reserve, Average Recorded Investment	7,409,000	8,150,000
Total Impaired, Average Recorded Investment, Total	9,004,000	11,213,000
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	57,000	88,000
Total Impaired with no Reserve, Interest Paid YTD	251,000	401,000
Total Impaired, Interest Paid YTD	308,000	489,000
Total impaired loans including troubled debt restructurings	3,951,000		5,695,000
Residential Real Estate [Member] | One-to-Four Family [Member] | Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	8,899,000		12,845,000
Residential Real Estate [Member] | One-to-Four Family [Member] | Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	7,348,000		10,509,000
Residential Real Estate [Member] | One-to-Four Family [Member] | Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	410,948,000		369,463,000
Residential Real Estate [Member] | Multi Family [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	580,134,000		558,592,000
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	0		0
Total Impaired, with no Reserve, Recorded Investment	833,000		3,941,000
Total Impaired, Recorded Investment	833,000		3,941,000
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	0		0
Total Impaired with no Reserve, Unpaid Principal Balance	1,699,000		4,952,000
Total Impaired, Unpaid Principal Balance, Total	1,699,000		4,952,000
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	0		0
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	0		0
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	0		0
Total Impaired with no Reserve, Cumulative Charge-offs	866,000		1,011,000
Total Impaired, Cumulative Charge-offs	866,000		1,011,000
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	0	0
Total Impaired with no Reserve, Average Recorded Investment	834,000	4,005,000
Total Impaired, Average Recorded Investment, Total	834,000	4,005,000
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	0	0
Total Impaired with no Reserve, Interest Paid YTD	63,000	230,000
Total Impaired, Interest Paid YTD	63,000	230,000
Total impaired loans including troubled debt restructurings	833,000		3,941,000
Residential Real Estate [Member] | Multi Family [Member] | Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	833,000		1,427,000
Residential Real Estate [Member] | Multi Family [Member] | Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	498,000		3,975,000
Residential Real Estate [Member] | Multi Family [Member] | Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	578,803,000		553,190,000
Residential Real Estate [Member] | Home Equity [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	21,606,000		21,778,000
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	159,000		188,000
Total Impaired, with no Reserve, Recorded Investment	143,000		254,000
Total Impaired, Recorded Investment	302,000		442,000
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	159,000		188,000
Total Impaired with no Reserve, Unpaid Principal Balance	143,000		254,000
Total Impaired, Unpaid Principal Balance, Total	302,000		442,000
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	77,000		79,000
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	77,000		79,000
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	0		0
Total Impaired with no Reserve, Cumulative Charge-offs	0		0
Total Impaired, Cumulative Charge-offs	0		0
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	165,000	198,000
Total Impaired with no Reserve, Average Recorded Investment	147,000	258,000
Total Impaired, Average Recorded Investment, Total	312,000	456,000
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	10,000	15,000
Total Impaired with no Reserve, Interest Paid YTD	4,000	9,000
Total Impaired, Interest Paid YTD	14,000	24,000
Total impaired loans including troubled debt restructurings			146,000
Residential Real Estate [Member] | Home Equity [Member] | Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	272,000		428,000
Residential Real Estate [Member] | Home Equity [Member] | Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	199,000		149,000
Residential Real Estate [Member] | Home Equity [Member] | Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	21,135,000		21,201,000
Construction and Land [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	16,451,000		18,179,000
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	0		0
Total Impaired, with no Reserve, Recorded Investment	37,000		0
Total Impaired, Recorded Investment	37,000		0
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	0		0
Total Impaired with no Reserve, Unpaid Principal Balance	51,000		0
Total Impaired, Unpaid Principal Balance, Total	51,000		0
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	0		0
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	0		0
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	0		0
Total Impaired with no Reserve, Cumulative Charge-offs	14,000		0
Total Impaired, Cumulative Charge-offs	14,000		0
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	0	0
Total Impaired with no Reserve, Average Recorded Investment	45,000	0
Total Impaired, Average Recorded Investment, Total	45,000	0
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	0	0
Total Impaired with no Reserve, Interest Paid YTD	0	0
Total Impaired, Interest Paid YTD	0	0
Construction and Land [Member] | Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	37,000		0
Construction and Land [Member] | Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	0		436,000
Construction and Land [Member] | Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	16,414,000		17,743,000
Construction and Land [Member] | Home Equity [Member]
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total impaired loans including troubled debt restructurings	48,000
Commercial Real Estate [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	181,328,000		159,401,000
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	38,000		280,000
Total Impaired, with no Reserve, Recorded Investment	434,000		438,000
Total Impaired, Recorded Investment	472,000		718,000
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	447,000		689,000
Total Impaired with no Reserve, Unpaid Principal Balance	434,000		438,000
Total Impaired, Unpaid Principal Balance, Total	881,000		1,127,000
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	38,000		83,000
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	38,000		83,000
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	409,000		409,000
Total Impaired with no Reserve, Cumulative Charge-offs	0		0
Total Impaired, Cumulative Charge-offs	409,000		409,000
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	45,000	295,000
Total Impaired with no Reserve, Average Recorded Investment	436,000	442,000
Total Impaired, Average Recorded Investment, Total	481,000	737,000
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	0	15,000
Total Impaired with no Reserve, Interest Paid YTD	11,000	13,000
Total Impaired, Interest Paid YTD	11,000	28,000
Total impaired loans including troubled debt restructurings	328,000		355,000
Commercial Real Estate [Member] | Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	1,062,000		717,000
Commercial Real Estate [Member] | Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	456,000		1,389,000
Commercial Real Estate [Member] | Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	179,810,000		157,295,000
Consumer [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	266,000		319,000
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	0		0
Total Impaired, with no Reserve, Recorded Investment	0		0
Total Impaired, Recorded Investment	0		0
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	0		0
Total Impaired with no Reserve, Unpaid Principal Balance	0		0
Total Impaired, Unpaid Principal Balance, Total	0		0
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	0		0
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	0		0
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	0		0
Total Impaired with no Reserve, Cumulative Charge-offs	0		0
Total Impaired, Cumulative Charge-offs	0		0
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	0	0
Total Impaired with no Reserve, Average Recorded Investment	0	0
Total Impaired, Average Recorded Investment, Total	0	0
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	0	0
Total Impaired with no Reserve, Interest Paid YTD	0	0
Total Impaired, Interest Paid YTD	0	0
Consumer [Member] | Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	0		0
Consumer [Member] | Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	0		0
Consumer [Member] | Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	266,000		319,000
Commercial Loans [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	34,180,000		26,798,000
Impaired Loans Receivable, Recorded Investment [Abstract]
Total Impaired, with Reserve, Recorded Investment	0		1,000
Total Impaired, with no Reserve, Recorded Investment	26,000		40,000
Total Impaired, Recorded Investment	26,000		41,000
Impaired Loans Receivable, Unpaid Principal Balance [Abstract]
Total Impaired with Reserve, Unpaid Principal Balance	0		1,000
Total Impaired with no Reserve, Unpaid Principal Balance	26,000		40,000
Total Impaired, Unpaid Principal Balance, Total	26,000		41,000
Impaired Loans Receivable, Reserve [Abstract]
Total Impaired with Reserve, Reserve	0		1,000
Total Impaired with no Reserve, Reserve	0		0
Impaired Loans, Reserve	0		1,000
Impaired Loans Receivable, Cumulative Charge Offs [Abstract]
Total Impaired with Reserve, Cumulative Charge-offs	0		0
Total Impaired with no Reserve, Cumulative Charge-offs	0		0
Total Impaired, Cumulative Charge-offs	0		0
Impaired Loans Receivable, Average Recorded Investment [Abstract]
Total Impaired with Reserve, Average Recorded Investment	0	2,000
Total Impaired with no Reserve, Average Recorded Investment	26,000	46,000
Total Impaired, Average Recorded Investment, Total	26,000	48,000
Impaired Loans Receivable, Interest Paid YTD [Abstract]
Total Impaired with Reserve, Interest Paid YTD	0	0
Total Impaired with no Reserve, Interest Paid YTD	0	2,000
Total Impaired, Interest Paid YTD	0	$ 2,000
Commercial Loans [Member] | Substandard [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	1,595,000		41,000
Commercial Loans [Member] | Watch [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	761,000		3,671,000
Commercial Loans [Member] | Pass [Member]
Loans Receivable, Recorded Investment [Line Items]
At December 31, 2016	$ 31,824,000		$ 23,086,000

Loans Receivable, Part V (Detai

Loans Receivable, Part V (Details)	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2017USD ($)Loan	Sep. 30, 2016USD ($)Loan	Sep. 30, 2017USD ($)LoanPayment	Dec. 31, 2016USD ($)Loan
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	$ 5,160,000		$ 5,160,000	$ 10,137,000
Total number of troubled debt restructurings | Loan			15	47
Period of principal forbearance, reduction in interest rate or both included in typical restructured terms			0 months
Valuation allowance with respect to troubled debt restructurings	96,000		$ 96,000	$ 293,000
Minimum number of consecutive contractual payments received prior to consideration for a return to accrual status | Payment			6
Troubled Debt Restructurings by Concession Type [Abstract]
Loans Receivable, Modifications, Loans Performing in Accordance with Modified Terms	$ 4,464,000		$ 4,464,000	$ 9,376,000
Number of loans performing in accordance with modified terms | Loan	13		13	45
Loans Receivable, Modifications, Loans in Default	$ 696,000		$ 696,000	$ 761,000
Number of Loans in Default | Loan	2		2	2
Loans Receivable, Modifications, Total	$ 5,160,000		$ 5,160,000	$ 10,137,000
Number of Loans, Total | Loan	15		15	47
Data on Troubled Debt Restructuring [Abstract]
Loans modified as a troubled debt restructure
Number of loans modified as a troubled debt restructuring | Loan
Non accrual Loans [Abstract]
Total non-accrual loans	$ 7,009,000		$ 7,009,000	$ 9,857,000
Ratio of total non-accrual loans to total loans, net of allowance			0.56%	0.84%
Ratio of total non-accrual loans to total assets			0.38%	0.55%
Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	3,086,000		$ 3,086,000	$ 6,154,000
Total number of troubled debt restructurings | Loan			4	6
Non-Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	2,074,000		$ 2,074,000	$ 3,983,000
Total number of troubled debt restructurings | Loan			11	41
Interest Reduction and Principal Forbearance [Member]
Troubled Debt Restructurings by Concession Type [Abstract]
Loans Receivable, Modifications, Loans Performing in Accordance with Modified Terms	$ 4,060,000		$ 4,060,000	$ 8,221,000
Number of loans performing in accordance with modified terms | Loan	9		9	22
Loans Receivable, Modifications, Loans in Default	$ 0		$ 0	$ 761,000
Number of Loans in Default | Loan	0		0	2
Loans Receivable, Modifications, Total	$ 4,060,000		$ 4,060,000	$ 8,982,000
Number of Loans, Total | Loan	9		9	24
Interest Reduction [Member]
Troubled Debt Restructurings by Concession Type [Abstract]
Loans Receivable, Modifications, Loans Performing in Accordance with Modified Terms	$ 356,000		$ 356,000	$ 1,106,000
Number of loans performing in accordance with modified terms | Loan	3		3	22
Loans Receivable, Modifications, Loans in Default	$ 696,000		$ 696,000	$ 0
Number of Loans in Default | Loan	2		2	0
Loans Receivable, Modifications, Total	$ 1,052,000		$ 1,052,000	$ 1,106,000
Number of Loans, Total | Loan	5		5	22
Principal Forbearance [Member]
Troubled Debt Restructurings by Concession Type [Abstract]
Loans Receivable, Modifications, Loans Performing in Accordance with Modified Terms	$ 48,000		$ 48,000	$ 49,000
Number of loans performing in accordance with modified terms | Loan	1		1	1
Loans Receivable, Modifications, Loans in Default	$ 0		$ 0	$ 0
Number of Loans in Default | Loan	0		0	0
Loans Receivable, Modifications, Total	$ 48,000		$ 48,000	$ 49,000
Number of Loans, Total | Loan	1		1	1
Residential Real Estate [Member] | One-to-Four Family [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	$ 3,951,000		$ 3,951,000	$ 5,695,000
Total number of troubled debt restructurings | Loan			9	37
Non accrual Loans [Abstract]
Total non-accrual loans	5,709,000		$ 5,709,000	$ 7,623,000
Residential Real Estate [Member] | One-to-Four Family [Member] | Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	2,747,000		$ 2,747,000	$ 3,296,000
Total number of troubled debt restructurings | Loan			2	3
Residential Real Estate [Member] | One-to-Four Family [Member] | Non-Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	1,204,000		$ 1,204,000	$ 2,399,000
Total number of troubled debt restructurings | Loan			7	34
Residential Real Estate [Member] | Multi Family [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	833,000		$ 833,000	$ 3,941,000
Total number of troubled debt restructurings | Loan			3	6
Non accrual Loans [Abstract]
Total non-accrual loans	833,000		$ 833,000	$ 1,427,000
Residential Real Estate [Member] | Multi Family [Member] | Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	0		$ 0	$ 2,514,000
Total number of troubled debt restructurings | Loan			0	1
Residential Real Estate [Member] | Multi Family [Member] | Non-Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	833,000		$ 833,000	$ 1,427,000
Total number of troubled debt restructurings | Loan			3	5
Residential Real Estate [Member] | Home Equity [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring				$ 146,000
Total number of troubled debt restructurings | Loan				2
Non accrual Loans [Abstract]
Total non-accrual loans	223,000		$ 223,000	$ 344,000
Residential Real Estate [Member] | Home Equity [Member] | Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring				$ 49,000
Total number of troubled debt restructurings | Loan				1
Residential Real Estate [Member] | Home Equity [Member] | Non-Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring				$ 97,000
Total number of troubled debt restructurings | Loan				1
Construction and Land [Member]
Non accrual Loans [Abstract]
Total non-accrual loans	37,000		37,000	$ 0
Construction and Land [Member] | Home Equity [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	48,000		$ 48,000
Total number of troubled debt restructurings | Loan			1
Construction and Land [Member] | Home Equity [Member] | Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	48,000		$ 48,000
Total number of troubled debt restructurings | Loan			1
Construction and Land [Member] | Home Equity [Member] | Non-Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	0		$ 0
Total number of troubled debt restructurings | Loan			0
Commercial Real Estate [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	328,000		$ 328,000	$ 355,000
Total number of troubled debt restructurings | Loan			2	2
Non accrual Loans [Abstract]
Total non-accrual loans	181,000		$ 181,000	$ 422,000
Commercial Real Estate [Member] | Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	291,000		$ 291,000	$ 295,000
Total number of troubled debt restructurings | Loan			1	1
Commercial Real Estate [Member] | Non-Accruing [Member]
Troubled Debt Restructuring Note, Debtor [Abstract]
Amount of troubled debt restructuring	37,000		$ 37,000	$ 60,000
Total number of troubled debt restructurings | Loan			1	1
Consumer [Member]
Non accrual Loans [Abstract]
Total non-accrual loans	0		$ 0	$ 0
Commercial Loans [Member]
Non accrual Loans [Abstract]
Total non-accrual loans	$ 26,000		$ 26,000	$ 41,000

Real Estate Owned (Details)

Real Estate Owned (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Real Estate [Line Items]
Real estate owned, net	$ 4,568	$ 7,454	$ 6,118	$ 9,190
Transferred from loans receivable	1,609	3,442
Sales	(2,654)	(4,762)
Write downs	(504)	(416)
Other	(1)	$ 0
Mortgage loans in process of foreclosure	3,000		3,100
One-to-Four Family [Member]
Real Estate [Line Items]
Real estate owned, net	1,021		2,141
Multi Family [Member]
Real Estate [Line Items]
Real estate owned, net	169		0
Construction and Land [Member]
Real Estate [Line Items]
Real estate owned, net	4,822		5,082
Commercial Real Estate [Member]
Real Estate [Line Items]
Real estate owned, net	300		300
Real Estate Owned Prior To Valuation Allowance [Member]
Real Estate [Line Items]
Real estate owned, net	6,312		7,523
Valuation Allowance, Real Estate Owned [Member]
Real Estate [Line Items]
Valuation allowance at end of period	$ (1,744)		$ (1,405)

Mortgage Servicing Rights (Deta

Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Mortgage servicing rights [Roll Forward]
Mortgage servicing rights at beginning of the period	$ 2,260	$ 1,422
Additions	793	1,486
Amortization	(71)	(412)
Sales	(2,264)	0
Mortgage servicing rights at end of the period	718	2,496
Valuation allowance at end of period	0	(100)
Mortgage servicing rights at end of the period, net	718	2,396
Estimated future servicing rights amortization expense by period [Abstract]
2,017	25
2,018	106
2,019	96
2,020	86
2,021	76
Thereafter	329
Total	718
MSR Sales [Abstract]
Loans originated for sale	1,880	1,800
Sales of loans held for sale	2,030	1,800
Generated mortgage banking income	92,800	91,100
Loans sold on a servicing retained basis	99,200	371,300	$ 318,600
Sold mortgage servicing rights	2,264	$ 0
Sales Of Mortgage Servicing Rights	295,100
Mortgage servicing rights book value	2,300
Mortgage servicing rights sold	2,600
Gain on sale of MSR	$ 308,000,000

Deposits (Details)

Deposits (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Deposits [Abstract]
Time deposits, greater than $250,000	$ 43,600,000	$ 44,500,000
Summary of the contractual maturities of time deposits [Abstract]
Within one year	514,304,000
More than one to two years	153,213,000
More than two to three years	13,618,000
More than three to four years	1,358,000
More than four through five years	2,540,000
Time deposits	685,033,000	$ 666,584,000
Minimum [Member]
Deposits [Abstract]
Time deposits, greater than $250,000	$ 250,000

Borrowings (Details)

Borrowings (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)Loan	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Short-term repurchase agreements, outstanding	$ 0
Long-term borrowings	$ 435,503	$ 387,155
Weighted average rate	1.81%	2.27%
Total debt	$ 435,503	$ 387,155
Percentage of carrying value of qualifying of one-to-four family loans	79.00%	79.00%
Percentage of carrying value of qualifying home equity loans	75.00%	75.00%
Percentage of carrying value of qualifying of multi-family loans	51.00%	51.00%
FHLBC stock as collateral	$ 18,500	$ 13,300
Federal Home Loan Bank, Chicago Advances [Member]
Debt Instrument [Line Items]
Short-term borrowings	$ 55,000	$ 65,000
Weighted average rate	1.25%	0.61%
Repurchase Agreements [Member]
Debt Instrument [Line Items]
Short-term borrowings	$ 10,503	$ 8,155
Weighted average rate	3.99%	3.52%
Long-term borrowings	$ 15,000	$ 84,000
Weighted average rate	2.89%	3.96%
Securities sold under agreements to repurchase, fair value of collateral	$ 25,600	$ 93,200
Repurchase Agreements [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	2.89%
Repurchase Agreements [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate	2.89%
Short Term Debt Maturing March 15, 2018 [Member] | Federal Home Loan Bank, Chicago Advances [Member]
Debt Instrument [Line Items]
Short-term borrowings	$ 35,000
FHLB, interest rate	1.28%
Maturity date	Mar. 15, 2018
Number of federal home loan bank advances | Loan	1
Short Term Debt Maturing August 25, 2017 [Member] | Federal Home Loan Bank, Chicago Advances [Member]
Debt Instrument [Line Items]
Short-term borrowings	$ 20,000
FHLB, interest rate	1.20%
Maturity date	Oct. 4, 2017
Number of federal home loan bank advances | Loan	1
Long Term Debt Maturing 2017 [Member] | Federal Home Loan Bank, Chicago Advances [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 65,000	$ 65,000
Weighted average rate	3.19%	3.19%
Number of federal home loan bank advances | Loan	3
Long Term Debt Maturing 2017 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | Minimum [Member]
Debt Instrument [Line Items]
FHLB, interest rate	3.09%
Long Term Debt Maturing 2017 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | Maximum [Member]
Debt Instrument [Line Items]
FHLB, interest rate	3.46%
Long Term Debt Maturing 2018 [Member] | Federal Home Loan Bank, Chicago Advances [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 65,000	$ 65,000
Weighted average rate	2.97%	2.97%
Number of federal home loan bank advances | Loan	3
Long Term Debt Maturing 2018 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | Minimum [Member]
Debt Instrument [Line Items]
FHLB, interest rate	2.73%
Long Term Debt Maturing 2018 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | Maximum [Member]
Debt Instrument [Line Items]
FHLB, interest rate	3.11%
Long Term Debt Maturing 2021 [Member] | Federal Home Loan Bank, Chicago Advances [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 100,000	$ 100,000
Weighted average rate	0.78%	0.78%
Long Term Debt Maturing 2021 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | FHLB Call Option Beginning June 2018 [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 50,000
Number of federal home loan bank advances | Loan	2
Long Term Debt Maturing 2021 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | FHLB Call Option Beginning June 2018 [Member] | Minimum [Member]
Debt Instrument [Line Items]
FHLB, interest rate	0.67%
Long Term Debt Maturing 2021 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | FHLB Call Option Beginning June 2018 [Member] | Maximum [Member]
Debt Instrument [Line Items]
FHLB, interest rate	0.73%
Long Term Debt Maturing 2021 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | FHLB Call Option Beginning September 2018 [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 50,000
FHLB, interest rate	0.85%
Number of federal home loan bank advances | Loan	1
Long Term Debt Maturing 2027 [Member] | Federal Home Loan Bank, Chicago Advances [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 125,000	$ 0
Weighted average rate	1.23%	0.00%
Number of federal home loan bank advances | Loan	3
Long Term Debt Maturing 2027 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | FHLB Call Option Beginning May 2019 [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 50,000
FHLB, interest rate	1.24%
Number of federal home loan bank advances | Loan	1
Long Term Debt Maturing 2027 [Member] | Federal Home Loan Bank, Chicago Advances [Member] | FHLB Call Option Beginning June 2019 [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 50,000
FHLB, interest rate	1.23%
Number of federal home loan bank advances | Loan	1

Regulatory Capital (Details)

Regulatory Capital (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets)	$ 425,064	$ 426,496
Tier I capital (to risk-weighted assets)	411,001	410,467
Common Equity Tier 1 Capital (to risk-weighted assets)	411,001	410,467
Tier I capital (to average assets)	$ 411,001	$ 410,467
Total capital (to risk-weighted assets) Ratio	30.70%	32.23%
Tier I capital (to risk-weighted assets) Ratio	29.69%	31.02%
Common Equity Tier 1 capital (to risk-weighted assets) Ratio	29.69%	31.02%
Tier I capital (to average assets) Ratio	21.90%	23.20%
Total capital (to risk-weighted assets), For Capital Adequacy Purposes	$ 110,755	$ 105,870
Tier I capital (to risk-weighted assets), For Capital Adequacy Purposes	83,066	79,402
Common Equity Tier I capital (to risk weighted assets), For Capital Adequacy Purposes	62,300	59,552
Tier I capital (to average assets), For Capital Adequacy Purposes	$ 75,054	$ 70,760
Total capital (to risk-weighted assets), For Capital Adequacy Ratio	8.00%	8.00%
Tier I capital (to risk-weighted assets), For Capital Adequacy Ratio	6.00%	6.00%
Common Equity Tier I capital ( to risk-weighted), For Capital Adequacy Ratio	4.50%	4.50%
Tier I capital (to average assets), For Capital Adequacy Ratio	4.00%	4.00%
Total capital (to risk-weighted assets), Minimum Capital Adequacy with Capital Buffer	$ 128,061	$ 114,141
Tier I capital (to risk weighted assets), Minimum Capital Adequacy with Capital Buffer	100,372	87,673
Common Equity Tier I capital (to risk weighted assets) Minimum Capital Adequacy with Capital Buffer	$ 79,605	$ 67,823
Total capital (to risk-weighted assets), Minimum Capital Adequacy with Capital Buffer Ratio	9.25%	8.625%
Tier I capital (to risk weighted assets), Minimum Capital Adequacy with Capital Buffer Ratio	7.25%	6.625%
Common Equity Tier I capital (to risk weighted), Minimum Capital Adequacy with Capital Buffer Ratio	5.75%	5.125%
Waterstone Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets)	$ 400,873	$ 389,602
Tier I capital (to risk-weighted assets)	386,810	373,573
Common Equity Tier 1 Capital (to risk-weighted assets)	386,810	373,573
Tier I capital (to average assets)	386,810	373,573
State of Wisconsin (to total assets)	$ 386,810	$ 373,573
Total capital (to risk-weighted assets) Ratio	28.99%	29.50%
Tier I capital (to risk-weighted assets) Ratio	27.98%	28.29%
Common Equity Tier 1 capital (to risk-weighted assets) Ratio	27.98%	28.29%
Tier I capital (to average assets) Ratio	20.67%	21.17%
State of Wisconsin (to total assets) Ratio	20.91%	20.90%
Total capital (to risk-weighted assets), For Capital Adequacy Purposes	$ 110,613	$ 105,641
Tier I capital (to risk-weighted assets), For Capital Adequacy Purposes	82,960	79,231
Common Equity Tier I capital (to risk weighted assets), For Capital Adequacy Purposes	62,220	59,423
Tier I capital (to average assets), For Capital Adequacy Purposes	74,859	70,573
State of Wisconsin (to total assets), For Capital Adequacy Purposes	$ 110,989	$ 107,247
Total capital (to risk-weighted assets), For Capital Adequacy Ratio	8.00%	8.00%
Tier I capital (to risk-weighted assets), For Capital Adequacy Ratio	6.00%	6.00%
Common Equity Tier I capital ( to risk-weighted), For Capital Adequacy Ratio	4.50%	4.50%
Tier I capital (to average assets), For Capital Adequacy Ratio	4.00%	4.00%
State of Wisconsin (to total assets), For Capital Adequacy Ratio	6.00%	6.00%
Total capital (to risk-weighted assets), Minimum Capital Adequacy with Capital Buffer	$ 127,896	$ 113,895
Tier I capital (to risk weighted assets), Minimum Capital Adequacy with Capital Buffer	100,243	87,484
Common Equity Tier I capital (to risk weighted assets) Minimum Capital Adequacy with Capital Buffer	$ 79,503	$ 67,676
Total capital (to risk-weighted assets), Minimum Capital Adequacy with Capital Buffer Ratio	9.25%	8.625%
Tier I capital (to risk weighted assets), Minimum Capital Adequacy with Capital Buffer Ratio	7.25%	6.625%
Common Equity Tier I capital (to risk weighted), Minimum Capital Adequacy with Capital Buffer Ratio	5.75%	5.125%
Total capital (to risk-weighted assets), To Be Well-Capitalized Under Prompt Corrective Action Provisions	$ 138,266	$ 132,052
Tier I capital (to risk-weighted assets), To Be Well-Capitalized Under Prompt Corrective Action Provisions	110,613	105,641
Common Equity Tier I capital (to risk-weighted assets), To Be Well-Capitalized Under Prompt Corrective Action Provisions	89,873	85,834
Tier I capital (to average assets), To Be Well-Capitalized Under Prompt Corrective Action Provisions	$ 93,574	$ 88,216
Total capital (to risk-weighted assets), To Be Well-Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier I capital (to risk-weighted assets), To Be Well-Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%	8.00%
Common Equity Tier I capital (to risk-weighted) , To Be Well-Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier I capital (to average assets), To Be Well-Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Taxes [Abstract]
Income tax expense	$ 4,362,000	$ 5,556,000	$ 12,397,000	$ 12,214,000
Income before income taxes	$ 11,751,000	$ 13,061,000	$ 35,246,000	$ 31,347,000
Effective tax rate			35.20%	39.00%
Benefit related to stock awards exercised			$ 827,000

Offsetting of Assets and Liab52

Offsetting of Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Net Amount [Member]
Schedule of Liabilities subject to netting agreement [Line Items]
Short-term repurchase Agreements	$ 0	$ 0
Long term repurchase agreements	0	0
Repurchase Agreement	0	0
Gross Recognized Liabilities [Member]
Schedule of Liabilities subject to netting agreement [Line Items]
Short-term repurchase Agreements	10,503	8,155
Long term repurchase agreements	15,000	84,000
Repurchase Agreement	25,503	92,155
Gross Amounts Offset [Member]
Schedule of Liabilities subject to netting agreement [Line Items]
Short-term repurchase Agreements	0	0
Long term repurchase agreements	0	0
Repurchase Agreement	0	0
Net Amounts Presented [Member]
Schedule of Liabilities subject to netting agreement [Line Items]
Short-term repurchase Agreements	10,503	8,155
Long term repurchase agreements	15,000	84,000
Repurchase Agreement	25,503	92,155
Gross Amounts Not Offset [Member]
Schedule of Liabilities subject to netting agreement [Line Items]
Short-term repurchase Agreements	10,503	8,155
Long term repurchase agreements	15,000	84,000
Repurchase Agreement	$ 25,503	$ 92,155

Commitments, Off-Balance Shee53

Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Details) - USD ($) $ in Thousands		Jul. 05, 2017	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Period of home equity loans available to the borrower			10 years
Amount of damages awarded		$ 7,300
Attorney's fees		3,300
Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Probable losses		0
Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Period of commitments for loans extended to customers			90 days
Period of construction loans available to the borrower			1 year
Probable losses		$ 11,000
Commitments to Extend Credit Under Amortizing Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks asset amount	[1]		$ 52,948	$ 30,903
Probable losses			0	0
Commitments to Extend Credit Under Home Equity Lines of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks asset amount	[2]		14,724	14,367
Probable losses			0	0
Unused Portion of Construction Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks asset amount	[3]		18,306	21,137
Unused Portion of Business Lines of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks asset amount			17,204	15,095
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet risks liability amount			259	333
Probable losses			$ 0	$ 0
[1]	Commitments for loans are extended to customers for up to 90 days after which they expire. Excludes commitments to originate loans held for sale, which are discussed in the following footnote.
[2]	Unused portions of home equity loans are available to the borrower for up to 10 years.
[3]	Unused portions of construction loans are available to the borrower for up to one year.

Derivative Financial Instrume54

Derivative Financial Instruments (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)
Forward Commitments to Sell Mortgage Loans [Member]
Derivative [Line Items]
Aggregate notional amount of derivatives	$ 349.3
Gain reported as a component of other assets	604,000
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Aggregate notional amount of derivatives	201.8
Gain reported as a component of other assets	$ 2

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic and Diluted Earnings Per Share Calculations [Abstract]
Net income (loss)	$ 7,389	$ 7,505	$ 22,849	$ 19,133
Net income available to unvested restricted shares	0	5	0	12
Net income available to common stockholders	$ 7,389	$ 7,500	$ 22,849	$ 19,121
Weighted average shares outstanding (in shares)	27,532	27,043	27,449	26,976
Effect of dilutive potential common shares (in shares)	421	386	478	307
Diluted weighted average shares outstanding (in shares)	27,953	27,429	27,927	27,283
Basic earnings per share (in dollars per share)	$ 0.27	$ 0.28	$ 0.83	$ 0.71
Diluted earnings per share (in dollars per share)	$ 0.26	$ 0.27	$ 0.82	$ 0.70

Fair Value Measurements, Fair V

Fair Value Measurements, Fair Value of Assets and Liabilities Measured On Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Available-for-Sale Securities [Abstract]
Loans held for sale		$ 175,137	$ 225,248
Recurring [Member]
Available-for-Sale Securities [Abstract]
Mortgage-backed securities		62,218	73,413
Collateralized mortgage obligations, Government sponsored enterprise issued		54,660	62,002
Government sponsored enterprise bonds		2,499	2,503
Municipal securities		65,662	70,696
Other debt securities		14,574	16,950
Certificates of deposit		1,227	1,231
Loans held for sale		175,137	225,248
Mortgage banking derivative assets		2,572	3,403
Mortgage banking derivatives liabilities			69
Recurring [Member] | Level 1 [Member]
Available-for-Sale Securities [Abstract]
Mortgage-backed securities		0	0
Collateralized mortgage obligations, Government sponsored enterprise issued		0	0
Government sponsored enterprise bonds		0	0
Municipal securities		0	0
Other debt securities		0	2,541
Certificates of deposit		0	0
Loans held for sale		0	0
Mortgage banking derivative assets		0	0
Mortgage banking derivatives liabilities			0
Recurring [Member] | Level 2 [Member]
Available-for-Sale Securities [Abstract]
Mortgage-backed securities		62,218	73,413
Collateralized mortgage obligations, Government sponsored enterprise issued		54,660	62,002
Government sponsored enterprise bonds		2,499	2,503
Municipal securities		65,662	70,696
Other debt securities		14,574	14,409
Certificates of deposit		1,227	1,231
Loans held for sale		175,137	225,248
Mortgage banking derivative assets		0	0
Mortgage banking derivatives liabilities			0
Recurring [Member] | Level 3 [Member]
Available-for-Sale Securities [Abstract]
Mortgage-backed securities		0	0
Collateralized mortgage obligations, Government sponsored enterprise issued		0	0
Government sponsored enterprise bonds		0	0
Municipal securities		0	0
Other debt securities		0	0
Certificates of deposit		0	0
Loans held for sale		0	0
Mortgage banking derivative assets		2,572	3,403
Mortgage banking derivatives liabilities			69
Non-Recurring [Member]
Available-for-Sale Securities [Abstract]
Impaired loans, net	[1]	1,452	2,814
Real estate owned		4,568	6,118
Non-Recurring [Member] | Level 1 [Member]
Available-for-Sale Securities [Abstract]
Impaired loans, net	[1]	0	0
Real estate owned		0	0
Non-Recurring [Member] | Level 2 [Member]
Available-for-Sale Securities [Abstract]
Impaired loans, net	[1]	0	0
Real estate owned		0	0
Non-Recurring [Member] | Level 3 [Member]
Available-for-Sale Securities [Abstract]
Impaired loans, net	[1]	1,452	2,814
Real estate owned		$ 4,568	$ 6,118
[1]	Represents collateral-dependent impaired loans, net, which are included in loans.

Fair Value Measurements, Fair57

Fair Value Measurements, Fair Value of Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Assets measured on recurring basis, unobservable input reconciliation [Roll Forward]
Amount of transfers	$ 0
Loans, impaired, outstanding balance	1,800,000		$ 3,500,000
Loans, impaired, specific reserve	313,000,000,000		662,000
Real estate owned, change in fair value	504,000	$ 416,000
Mortgage Banking Derivatives, Net [Member] | Recurring [Member]
Assets measured on recurring basis, unobservable input reconciliation [Roll Forward]
Beginning balance	3,334,000	$ 2,188,000	2,188,000
Mortgage derivative gain, net	(762,000)		1,146,000
Ending balance	$ 2,572,000		$ 3,334,000

Fair Value Measurements, Valuat

Fair Value Measurements, Valuation Techniques (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)
Mortgage Banking Derivatives [Member] | Pricing Models [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 2,572
Mortgage Banking Derivatives [Member] | Pricing Models [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Pull through rate	65.30%
Mortgage Banking Derivatives [Member] | Pricing Models [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Pull through rate	99.80%
Impaired Loans [Member] | Market Approach [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 1,452
Impaired Loans [Member] | Market Approach [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates applied to appraisals	15.00%
Impaired Loans [Member] | Market Approach [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates applied to appraisals	35.00%
Real Estate Owned [Member] | Market Approach [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 4,568
Real Estate Owned [Member] | Market Approach [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates applied to appraisals	15.00%
Real Estate Owned [Member] | Market Approach [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates applied to appraisals	85.70%

Fair Value Measurements, Balanc

Fair Value Measurements, Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial Assets [Abstract]
Securities available-for-sale	$ 200,840	$ 226,795
Loans held for sale	175,137	225,248
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and cash equivalents	92,591	47,217
Securities available-for-sale	200,840	226,795
Loans held for sale	175,137	225,248
Loans receivable	1,261,160	1,177,884
FHLB stock	18,450	13,275
Accrued interest receivable	4,575	4,281
Mortgage servicing rights	718	2,260
Mortgage banking derivative assets	2,572	3,403
Financial Liabilities [Abstract]
Deposits	956,773	949,411
Advance payments by borrowers for taxes	25,107	4,716
Borrowings	435,503	387,155
Accrued interest payable	918	916
Mortgage banking derivative liabilities	0	69
Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents	92,591	47,217
Securities available-for-sale	200,840	226,795
Loans held for sale	175,137	225,248
Loans receivable	1,284,340	1,212,967
FHLB stock	18,450	13,275
Accrued interest receivable	4,575	4,281
Mortgage servicing rights	867	3,232
Mortgage banking derivative assets	2,572	3,403
Financial Liabilities [Abstract]
Deposits	956,710	949,825
Advance payments by borrowers for taxes	25,107	4,716
Borrowings	435,398	390,932
Accrued interest payable	918	916
Mortgage banking derivative liabilities	0	69
Fair Value [Member] | Level 1 [Member]
Financial Assets [Abstract]
Cash and cash equivalents	74,491	34,967
Securities available-for-sale	0	2,541
Loans held for sale	0	0
Loans receivable	0	0
FHLB stock	0	0
Accrued interest receivable	4,575	4,281
Mortgage servicing rights	0	0
Mortgage banking derivative assets	0	0
Financial Liabilities [Abstract]
Deposits	271,740	282,827
Advance payments by borrowers for taxes	25,107	4,716
Borrowings	0	0
Accrued interest payable	918	916
Mortgage banking derivative liabilities	0	0
Fair Value [Member] | Level 2 [Member]
Financial Assets [Abstract]
Cash and cash equivalents	18,100	12,250
Securities available-for-sale	200,840	224,254
Loans held for sale	175,137	225,248
Loans receivable	0	0
FHLB stock	18,450	13,275
Accrued interest receivable	0	0
Mortgage servicing rights	0	0
Mortgage banking derivative assets	0	0
Financial Liabilities [Abstract]
Deposits	684,970	666,998
Advance payments by borrowers for taxes	0	0
Borrowings	435,398	390,932
Accrued interest payable	0	0
Mortgage banking derivative liabilities	0	0
Fair Value [Member] | Level 3 [Member]
Financial Assets [Abstract]
Cash and cash equivalents	0	0
Securities available-for-sale	0	0
Loans held for sale	0	0
Loans receivable	1,284,340	1,212,967
FHLB stock	0	0
Accrued interest receivable	0	0
Mortgage servicing rights	867	3,232
Mortgage banking derivative assets	2,572	3,403
Financial Liabilities [Abstract]
Deposits	0	0
Advance payments by borrowers for taxes	0	0
Borrowings	0	0
Accrued interest payable	0	0
Mortgage banking derivative liabilities	$ 0	$ 69

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)Segment	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segment			2
Segment Reporting Information [Line Items]
Net interest income	$ 13,033	$ 11,325	$ 37,409	$ 31,473
Provision for loan losses	20	135	(1,166)	340
Net interest income (loss) after provision for loan losses	13,013	11,190	38,575	31,133
Noninterest income	33,054	37,412	96,232	95,208
Noninterest expenses [Abstract]
Compensation, payroll taxes, and other employee benefits	26,153	27,573	73,732	70,968
Occupancy, office furniture and equipment	2,533	2,319	7,587	7,074
FDIC insurance premiums	129	140	366	500
Real estate owned	(20)	37	258	344
Other	3,054	3,347	10,227	9,663
Total noninterest expenses	34,316	35,541	99,561	94,994
Income (loss) before income taxes	11,751	13,061	35,246	31,347
Income tax expense	4,362	5,556	12,397	12,214
Net income (loss)	7,389	7,505	22,849	19,133
Total assets	1,854,128	1,795,035	1,854,128	1,795,035	$ 1,790,619
Holding Company and Other [Member]
Segment Reporting Information [Line Items]
Net interest income	15	71	153	209
Provision for loan losses	0	0	0	0
Net interest income (loss) after provision for loan losses	15	71	153	209
Noninterest income	(425)	(370)	(1,182)	(832)
Noninterest expenses [Abstract]
Compensation, payroll taxes, and other employee benefits	(122)	(114)	(366)	(342)
Occupancy, office furniture and equipment	0	0	0	0
FDIC insurance premiums	0	0	0	0
Real estate owned	0	0	0	0
Other	(268)	(233)	(698)	(387)
Total noninterest expenses	(390)	(347)	(1,064)	(729)
Income (loss) before income taxes	(20)	48	35	106
Income tax expense	(2)	682	23	706
Net income (loss)	(18)	(634)	12	(600)
Total assets	(209,192)	(241,615)	(209,192)	(241,615)
Operating Segments [Member]
Noninterest expenses [Abstract]
Other	5,521	5,472	17,618	16,108
Operating Segments [Member] | Community Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	13,120	11,244	37,233	30,977
Provision for loan losses	0	100	(1,300)	200
Net interest income (loss) after provision for loan losses	13,120	11,144	38,533	30,777
Noninterest income	1,161	1,658	2,968	3,583
Noninterest expenses [Abstract]
Compensation, payroll taxes, and other employee benefits	4,483	4,392	12,964	12,784
Occupancy, office furniture and equipment	733	740	2,356	2,388
FDIC insurance premiums	129	140	366	500
Real estate owned	(20)	37	258	344
Other	1,499	1,252	4,382	3,705
Total noninterest expenses	6,824	6,561	20,326	19,721
Income (loss) before income taxes	7,457	6,241	21,175	14,639
Income tax expense	2,597	2,107	6,658	4,711
Net income (loss)	4,860	4,134	14,517	9,928
Total assets	1,859,494	1,777,014	1,859,494	1,777,014
Operating Segments [Member] | Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	(102)	10	23	287
Provision for loan losses	20	35	134	140
Net interest income (loss) after provision for loan losses	(122)	(25)	(111)	147
Noninterest income	32,318	36,124	94,446	92,457
Noninterest expenses [Abstract]
Compensation, payroll taxes, and other employee benefits	21,792	23,295	61,134	58,526
Occupancy, office furniture and equipment	1,800	1,579	5,231	4,686
FDIC insurance premiums	0	0	0	0
Real estate owned	0	0	0	0
Other	4,290	4,453	13,934	12,790
Total noninterest expenses	27,882	29,327	80,299	76,002
Income (loss) before income taxes	4,314	6,772	14,036	16,602
Income tax expense	1,767	2,767	5,716	6,797
Net income (loss)	2,547	4,005	8,320	9,805
Total assets	$ 203,826	$ 259,636	$ 203,826	$ 259,636