Westbury Bancorp (WBBW) 10-Q 30 Jan 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Dec. 31, 2014	Jan. 30, 2015
Document and Entity Information
Entity Registrant Name	Westbury Bancorp, Inc.
Entity Central Index Key	1553326
Document Type	10-Q
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Current Fiscal Year End Date	-21
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		4,924,749
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
Assets
Cash and due from banks	$10,688	$9,369
Interest-bearing deposits	13,787	8,239
Cash and cash equivalents	24,475	17,608
Securities available-for-sale	83,180	90,346
Held-to-maturity Securities	3,025	0
Loans held for sale, at lower of cost or fair value	2,082	326
Loans, net of allowance for loan losses of $4,224 and $4,072 at December 31 and September 30, respectively	438,172	416,874
Federal Home Loan Bank stock, at cost	2,670	2,670
Foreclosed real estate	2,333	2,355
Real estate held for investment	3,730	3,763
Office properties and equipment, net	11,404	11,181
Cash surrender value of bank-owned life insurance	12,844	12,742
Mortgage servicing rights	1,528	1,624
Deferred tax asset	5,406	5,702
Other assets	3,765	3,504
Total assets	594,614	568,695
Liabilities
Deposits	472,688	454,928
Advances from Federal Home Loan Bank	31,000	17,000
Advance payments by borrowers for property taxes and insurance	255	5,869
Other liabilities	4,145	4,411
Total liabilities	508,088	482,208
Stockholders’ Equity
Preferred stock $0.01 par value, 50,000,000 shares authorized; none issued or outstanding	0	0
Common stock $0.01 par value, 100,000,000 shares authorized; 5,346,206 shares issued at December 31, 2014 and September 30, 2014	53	53
Additional paid-in capital	49,426	49,164
Retained earnings	45,637	45,190
Unearned Employee Stock Ownership Plan (ESOP) shares	-3,703	-3,754
Accumulated other comprehensive income (loss)	66	-46
Less treasury stock, 326,357 shares at cost, at December 31, 2014 and 271,296 at September 30, 2014	-4,953	-4,120
Total stockholders’ equity	86,526	86,487
Total liabilities and stockholders’ equity	$594,614	$568,695

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for loan losses (in dollars)	$4,224	$4,072
Preferred stock, par value (in dollars per share)	$0.01	$0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	5,346,206	5,346,206
Treasury stock, shares	326,357

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Interest and dividend income:
Loans	$4,459	$3,978
Investments - nontaxable	17	16
Investments - taxable	392	495
Interest bearing deposits	12	37
Total interest and dividend income	4,880	4,526
Interest expense:
Deposits	425	424
Advances from the Federal Home Loan Bank	4	0
Total interest expense	429	424
Net interest income before provision for loan losses	4,451	4,102
Provision for loan losses	350	150
Net interest income after provision for loan losses	4,101	3,952
Noninterest income:
Service fees on deposit accounts	1,156	1,065
Gain on sales of loans, net	69	47
Servicing fee income, net of amortization and impairment	37	247
Insurance and securities sales commissions	58	95
Gain on sales of securities	70	0
Gain on sales of branches and other assets	18	0
Increase in cash surrender value of life insurance	102	105
Rental income from real estate operations	128	160
Other income	36	39
Total noninterest income	1,674	1,758
Noninterest expenses:
Salaries and employee benefits	2,381	2,297
Commissions	55	51
Occupancy	313	427
Furniture and equipment	103	130
Data processing	781	861
Advertising	60	67
Real estate held for investment	103	152
Net loss from operations and sale of foreclosed real estate	148	334
FDIC insurance premiums	105	173
Other expenses	1,056	1,152
Total noninterest expenses	5,105	5,644
Income before income tax expense (benefit)	670	66
Income tax expense (benefit)	223	-2
Net income	$447	$68
Earnings per share:
Basic (in dollars per share)	$0.10	$0.01	[1]
Diluted (in dollars per share)	$0.10	$0.01	[1]
[1]	Three Months EndedDecember 31, 2014 2013Net income$447 $68Basic potential common shares: Weighted average shares outstanding4,833,308 5,142,541Weighted average unallocated ESOP shares(373,692) (393,119)Basic weighted average shares outstanding4,459,616 4,749.422Dilutive effect of equity awards15,975 —Diluted weighted average shares outstanding4,475,591 4,749,422Basic income per share$0.10 $0.01Diluted income per share$0.10 $0.01

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$447	$68
Other comprehensive income (loss), before tax:
Unrealized gains (losses) on available-for-sale securities	255	-496
Reclassification adjustment for realized gains included in net income	-70	0
Other comprehensive income (loss), before tax	185	-496
Income tax benefit (expense) related to items of other comprehensive income (loss)	-73	241
Other comprehensive income (loss), net of tax	112	-255
Comprehensive income (loss)	$559	($187)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Stockholders' Equity (USD $)	Total	Preferred Stock	Common Stock	Additional Paid In Capital	Retained Earnings	Unearned ESOP Shares	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
In Thousands, unless otherwise specified
Balance at Sep. 30, 2013	$90,602	$0	$51	$48,800	$46,625	($4,114)	($760)
Increase (Decrease) in Stockholders' Equity
Net income	68	0			68
Other comprehensive income (loss), net of tax	-255						-255
Allocation of 5,142 shares by ESOP	287			81		206
Balance at Dec. 31, 2013	90,702	0	51	48,881	46,693	-3,908	-1,015	0
Balance at Sep. 30, 2014	86,487	0	53	49,164	45,190	-3,754	-46	-4,120
Increase (Decrease) in Stockholders' Equity
Net income	447	0			447
Other comprehensive income (loss), net of tax	112						112
Repurchase of 55,061 shares of common stock	-833							-833
Stock based compensation expense	201			201
Commitment to be allocated of 5,142 ESOP shares	112			61		51
Balance at Dec. 31, 2014	$86,526	$0	$53	$49,426	$45,637	($3,703)	$66	($4,953)

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Number of shares purchased by ESOP	0	0
Number of shares repurchased during period	326,357	0
Number of restricted shares issued during period	203,665	0
Number of shares allocated by ESOP	41,140	20,570
Number of shares committed to be allocated by ESOP	10,285	0

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities
Net income	$447	$68
Adjustments to reconcile net income to net cash used in operating activities:
Provision for loan losses	350	150
Depreciation and amortization	145	200
Depreciation on real estate held for investment	33	49
Net amortization of securities premiums and discounts	149	180
Amortization and impairment of mortgage servicing rights	96	-94
Capitalization of mortgage servicing rights	0	-1
Gain on sales of available-for-sale securities	-70	0
Gain on sales of branches and other assets	-18	0
Loss on sale of foreclosed real estate	79	150
Write-down of foreclosed real estate	57	115
Loans originated for sale	-6,819	-2,490
Proceeds from sale of loans	5,132	3,437
Gain on sale of loans, net	-69	-47
ESOP compensation expense	112	95
Stock based compensation expense	201	0
Deferred income taxes	224	22
Increase in cash surrender value of life insurance	-102	-105
Net change in:
Other assets	-243	-579
Other liabilities and advance payments by borrowers for property taxes and insurance	-5,880	-5,249
Net cash used in operating activities	-6,176	-4,099
Cash Flows From Investing Activities
Purchases of securities available-for-sale	-8,189	-6,394
Proceeds from sales of securities available-for-sale	12,084	0
Proceeds from maturities, prepayments, and calls of securities available-for-sale	3,376	2,508
Purchases of securities held to maturity	-3,025	0
Proceeds from sale of real estate held for investment	0	49
Net increase in loans	-21,967	-4,150
Purchases of office properties and equipment	-368	-131
Proceeds from sales of foreclosed real estate	205	569
Net cash used in investing activities	-17,884	-7,549
Cash Flows From Financing Activities
Net increase (decrease) in deposits	17,760	-2,353
Increase in Federal Home Loan Bank borrowings	14,000	0
Purchase of Company treasury stock	-833	0
Net cash provided by (used in) financing activities	30,927	-2,353
Net increase (decrease) in cash and cash equivalents	6,867	-14,001
Cash and cash equivalents at beginning	17,608	47,665
Cash and cash equivalents at end	24,475	33,664
Supplemental Disclosures of Cash Flow Information
Interest paid (including amounts credited to deposits)	428	422
Supplemental Schedules of Noncash Investing Activities
Loans receivable transferred to foreclosed real estate	$319	$369

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation
	The accompanying unaudited consolidated financial statements of Westbury Bancorp, Inc. and its wholly-owned subsidiary, Westbury Bank, (the "Bank", and collectively, the “Company”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 8-03 of Regulation S-X.  Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations.
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Estimates used in the preparation of the financial statements are based on various factors including the current interest rate environment and the general strength of the local economy.  Changes in the overall interest rate environment can significantly affect the Company’s net interest income and the value of its recorded assets and liabilities.  Actual results could differ from those estimates used in the preparation of the financial statements.  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 stockholders’ equity.
	In the opinion of management, the accompanying unaudited financial statements contain all adjustments (consisting only of normal recurring accruals) necessary to present fairly the Company’s financial condition as of December 31, 2014 and September 30, 2014 and the results of operations and cash flows for the interim periods ended December 31, 2014 and 2013.  All interim amounts are unaudited, and the results of operations for the interim periods herein are not necessarily indicative of the results of operations to be expected for the year.  These financial statements should be read in conjunction with the Company’s audited financial statements and notes thereto for the year ended September 30, 2014 filed as part of Westbury Bancorp, Inc.’s Annual Report on Form 10-K for the year ended September 30, 2014.

Recent_Accounting_Developments

Recent Accounting Developments	3 Months Ended
	Dec. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Developments	Recent Accounting Developments
	In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740) - Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carrryforward Exists. ASU 2013-11 is intended to clarify the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss or a tax credit carrryforward exists. This presentation had not been addressed in Topic 740 and there was diversity in reporting practices in those instances. ASU 2013-11 requires an unrecognized tax benefit to be presented as a liability and not netted against a deferred tax asset. ASU 2013-11 is effective for reporting periods beginning after December 15, 2014. Adoption by the Company is not expected to have an impact on the consolidated financial statements and related disclosures.
	In January 2014, the FASB issued ASU 2014-04, Receivables (Topic 310) - Troubled Debt Restructurings by Creditors. ASU 2014-04 is intended to reduce diversity by clarifying when an in substance repossession or foreclosure occurs, that is, when a creditor should be considered to have received physical possession of residential real property collateralizing a consumer mortgage loan such that the loan receivable should be derecognized and the real estate property recognized. ASU 2014-04 is effective for annual periods beginning after December 15, 2014, and interim periods within annual periods beginning after December 15, 2015. Adoption by the Company is not expected to have a material impact on the consolidated financial statements and related disclosures.
	In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). ASU 2014-09 is intended to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within annual periods beginning after December 15, 2018. Adoption by the Company is not expected to have a material impact on the consolidated financial statements and related disclosures.
	In June 2014, the FASB issued ASU 2014-11, Transfers and Servicing (Topic 860) - Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. ASU 2014-11 is intended to clarify the accounting for and improve the disclosures related to repurchase-to-maturity transactions and repurchase financings. ASU 2014-11 is effective for the first interim or annual period beginning after December 15, 2015. Adoption by the Company is not expected to have a material impact on the consolidated financial statements and related disclosures.
	In June 2014, the FASB issued ASU 2014-12, Compensation - Stock Compensation (Topic 718) - Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period. ASU 2014-12 is intended to clarify the accounting for the timing of expense recognition related to employee share-based payments in which a performance target that effects vesting could be achieved after the requisite service period. ASU 2014-12 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. Adoption by the Company is not expected to have a material impact on the consolidated financial statements and related disclosures.
	In August 2014, the FASB issued ASU 2014-14, Receivables - Troubled Debt Restructuring by Creditors (Topic 310) - Classification of Certain Government-Guaranteed Mortgage Loans Upon Foreclosure. ASU 2014-14 is intended to clarify the accounting for and improve the consistency of balance sheet classification of certain foreclosed mortgage loans that are either fully or partially guaranteed under government programs. Greater consistency in classification of such mortgage loans upon foreclosure is expected to provide more decision-useful information about a creditor's foreclosed mortgage loans that are expected to be recovered, at least in part, through government guarantees. ASU 2014-14 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. Adoption by the Company is not expected to have a material impact on the consolidated financial statements and related disclosures.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	Earnings per common share is computed using the two-class method. Basic earnings per common share is computed by dividing net income by the weighted-average number of common shares outstanding, adjusted for weighted average unallocated ESOP shares, during the applicable period, excluding outstanding participating securities. Participating securities include non-vested restricted stock awards and restricted stock units, though no actual shares of common stock related to restricted stock units are issued until the settlement of such units, to the extent holders of these securities receive non-forfeitable dividends or dividend equivalents at the same rate as holders of the Company's common stock. Diluted earnings per share is computed using the weighted-average number of shares determined for the basic earnings per common share computation plus the dilutive effect of stock compensation using the treasury stock method.
	The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share (in thousands, except share and per share data).
		Three Months Ended
		December 31,
		2014			2013
	Net income	$	447		$	68
	Basic potential common shares:
	Weighted average shares outstanding	4,833,308			5,142,541
	Weighted average unallocated ESOP shares	(373,692		)	(393,119		)
	Basic weighted average shares outstanding	4,459,616			4,749.42
	Dilutive effect of equity awards	15,975			—
	Diluted weighted average shares outstanding	4,475,591			4,749,422
	Basic income per share	$	0.1		$	0.01
	Diluted income per share	$	0.1		$	0.01

Employee_Stock_Ownership_Plan

Employee Stock Ownership Plan	3 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock Ownership Plan	Employee Stock Ownership Plan
	The Bank maintains a leveraged employee stock ownership plan ("ESOP") that covers all employees meeting certain minimum age and service requirements. The ESOP was established in conjunction with the Company's stock offering completed in April 2013 and operates on a plan year ending December 31. The ESOP initially borrowed $4.1 million from the Company and used those funds to acquire 411,403 shares, or 8.0%, of the total number of shares issued by the Company in its initial public offering. The shares were acquired at a price of $10.00 per share. The Bank makes annual contributions to the ESOP equal to the ESOP's debt service. The ESOP shares were pledged as collateral for its debt. As the debt is repaid, shares are released from collateral and allocated to active participants, based on the proportion of debt service paid in the year. The Company accounts for its ESOP in accordance with ASC 718-40. Accordingly, because the debt is intercompany, it is eliminated in consolidation for presentation in these statements. The shares pledged as collateral are reported as unearned ESOP shares in the balance sheet. Total ESOP shares may be reduced as a result of employees leaving the Company as shares that have previously been released to those exiting employees may be removed from the ESOP and transferred to that employee. As shares are committed to be released from collateral, the Company reports compensation expense equal to the current market price of the shares, and the shares become outstanding for EPS computations. During the three months ended December 31, 2014, 5,142 shares were committed to be released. The total ESOP compensation expense recorded for the three months ended December 31, 2014 and 2013 was $112 and $95 respectively.
	The ESOP shares as of December 31, 2014 and September 30, 2014 were as follows (in thousands, except share data):
		31-Dec-14				September 30, 2014
	Allocated shares to active participants	17,392				20,570
	Shares released and available for allocation	20,570				—
	Shares committed to be released	—				15,428
	Unallocated shares	370,263				375,405
	Total ESOP shares	408,225				411,403
	Fair value of unallocated shares	$	6,072			$	5,650
	Compensation Equity Plans
	ASC Topic 718 requires that the grant date fair value of equity awards to employees be recognized as compensation expense over the period during which an employee is required to provide service in exchange for such award.
	The following table summarizes the impact of the Company's share-based payment plans in the financial statements for the periods shown (in thousands):
		Three Months Ended December 31,
		2014				2013
		(In thousands)
	Total cost of stock grant plan during the year	$	155			$	—
	Total cost of stock option plan during the year	46				—
	Total cost of share-based payment plans during the year	$	201			—
	Amount of related income tax benefit recognized in income	$	79			$	—
	The Company adopted the Westbury Bancorp Inc 2014 Equity Incentive Plan (the "Plan") in 2014. In June 2014, the Company's stockholders approved the Plan which authorized the issue of up to 203,665 restricted stock awards and up to 509,162 stock options. As of December 31, 2014 there were no restricted stock awards and 182,938 options available for future grants.
	Annual equity-based incentive awards are typically granted to selected officers and employees mid-year. Options are granted with an exercise price equal to no less than the market price of the Company's shares at the date of grant: those option awards generally vest over five years of service and have 10-year contractual terms. Restricted shares and units typically vest over a five year period. Equity awards may also be granted at other times throughout the year in connection with the recruitment and retention of officers and employees.
	The following table summarizes stock options outstanding for the three months ended December 31, 2014:
		Number of Options		Weighted Average Exercise Price			Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
	Options outstanding as of September 30, 2014	326,224		$	15.2
	Granted	—		—
	Exercised	—		—
	Expired or canceled	—		—
	Forfeited	—		—
	Options outstanding as of December 31, 2014	326,224		$	15.2		9.5	$	391
	Options exercisable as of December 31, 2014	—		$	—		—	$	—
	The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model based on certain assumptions. Expected volatility is based on historical volatility and the expectations of future volatility of Company shares. The risk free interest rate for periods within the contractual term of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. The expected life of options is estimated based on historical employee behavior and represents the period of time that options granted are expected to remain outstanding.
	The following assumptions were used for options granted during the year ended September 30, 2014:
	Risk-free interest rate	2.1		%
	Expected volatility of Company's stock	9.49		%
	Expected dividend yield	—		%
	Expected life of options (years)	7.5
	Weighted average fair value per option of options granted during the year	$	2.82
	The total intrinsic value of options exercised during the three months ended December 31, 2014 was $0.
	The following is a summary of changes in restricted shares and units for the three months ended December 31, 2014:
		Number of Shares			Weighted Average Grant Date Fair Value
	Shares and Units Outstanding at September 30, 2014	203,665			$	15.2
	Granted	—			—
	Vested	—			—
	Forfeited	—			—
	Shares and Units Outstanding at December 31, 2014	203,665			$	15.2
	The total intrinsic value of restricted shares that vested during the period ended December 31, 2014 was $0.
	As of December 31, 2014, there was $3.6 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements (including share option and nonvested share awards) granted under the Plan. At December 31, 2014, the weighted-average period over which the unrecognized compensation expense is expected to be recognized was approximately 4.5 years.

Compensation_Equity_Plans_Note

Compensation Equity Plans (Notes)	3 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Compensation Equity Plans	Employee Stock Ownership Plan
	The Bank maintains a leveraged employee stock ownership plan ("ESOP") that covers all employees meeting certain minimum age and service requirements. The ESOP was established in conjunction with the Company's stock offering completed in April 2013 and operates on a plan year ending December 31. The ESOP initially borrowed $4.1 million from the Company and used those funds to acquire 411,403 shares, or 8.0%, of the total number of shares issued by the Company in its initial public offering. The shares were acquired at a price of $10.00 per share. The Bank makes annual contributions to the ESOP equal to the ESOP's debt service. The ESOP shares were pledged as collateral for its debt. As the debt is repaid, shares are released from collateral and allocated to active participants, based on the proportion of debt service paid in the year. The Company accounts for its ESOP in accordance with ASC 718-40. Accordingly, because the debt is intercompany, it is eliminated in consolidation for presentation in these statements. The shares pledged as collateral are reported as unearned ESOP shares in the balance sheet. Total ESOP shares may be reduced as a result of employees leaving the Company as shares that have previously been released to those exiting employees may be removed from the ESOP and transferred to that employee. As shares are committed to be released from collateral, the Company reports compensation expense equal to the current market price of the shares, and the shares become outstanding for EPS computations. During the three months ended December 31, 2014, 5,142 shares were committed to be released. The total ESOP compensation expense recorded for the three months ended December 31, 2014 and 2013 was $112 and $95 respectively.
	The ESOP shares as of December 31, 2014 and September 30, 2014 were as follows (in thousands, except share data):
		31-Dec-14				September 30, 2014
	Allocated shares to active participants	17,392				20,570
	Shares released and available for allocation	20,570				—
	Shares committed to be released	—				15,428
	Unallocated shares	370,263				375,405
	Total ESOP shares	408,225				411,403
	Fair value of unallocated shares	$	6,072			$	5,650
	Compensation Equity Plans
	ASC Topic 718 requires that the grant date fair value of equity awards to employees be recognized as compensation expense over the period during which an employee is required to provide service in exchange for such award.
	The following table summarizes the impact of the Company's share-based payment plans in the financial statements for the periods shown (in thousands):
		Three Months Ended December 31,
		2014				2013
		(In thousands)
	Total cost of stock grant plan during the year	$	155			$	—
	Total cost of stock option plan during the year	46				—
	Total cost of share-based payment plans during the year	$	201			—
	Amount of related income tax benefit recognized in income	$	79			$	—
	The Company adopted the Westbury Bancorp Inc 2014 Equity Incentive Plan (the "Plan") in 2014. In June 2014, the Company's stockholders approved the Plan which authorized the issue of up to 203,665 restricted stock awards and up to 509,162 stock options. As of December 31, 2014 there were no restricted stock awards and 182,938 options available for future grants.
	Annual equity-based incentive awards are typically granted to selected officers and employees mid-year. Options are granted with an exercise price equal to no less than the market price of the Company's shares at the date of grant: those option awards generally vest over five years of service and have 10-year contractual terms. Restricted shares and units typically vest over a five year period. Equity awards may also be granted at other times throughout the year in connection with the recruitment and retention of officers and employees.
	The following table summarizes stock options outstanding for the three months ended December 31, 2014:
		Number of Options		Weighted Average Exercise Price			Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
	Options outstanding as of September 30, 2014	326,224		$	15.2
	Granted	—		—
	Exercised	—		—
	Expired or canceled	—		—
	Forfeited	—		—
	Options outstanding as of December 31, 2014	326,224		$	15.2		9.5	$	391
	Options exercisable as of December 31, 2014	—		$	—		—	$	—
	The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model based on certain assumptions. Expected volatility is based on historical volatility and the expectations of future volatility of Company shares. The risk free interest rate for periods within the contractual term of the option is based on the U.S. Treasury yield curve in effect at the time of the grant. The expected life of options is estimated based on historical employee behavior and represents the period of time that options granted are expected to remain outstanding.
	The following assumptions were used for options granted during the year ended September 30, 2014:
	Risk-free interest rate	2.1		%
	Expected volatility of Company's stock	9.49		%
	Expected dividend yield	—		%
	Expected life of options (years)	7.5
	Weighted average fair value per option of options granted during the year	$	2.82
	The total intrinsic value of options exercised during the three months ended December 31, 2014 was $0.
	The following is a summary of changes in restricted shares and units for the three months ended December 31, 2014:
		Number of Shares			Weighted Average Grant Date Fair Value
	Shares and Units Outstanding at September 30, 2014	203,665			$	15.2
	Granted	—			—
	Vested	—			—
	Forfeited	—			—
	Shares and Units Outstanding at December 31, 2014	203,665			$	15.2
	The total intrinsic value of restricted shares that vested during the period ended December 31, 2014 was $0.
	As of December 31, 2014, there was $3.6 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements (including share option and nonvested share awards) granted under the Plan. At December 31, 2014, the weighted-average period over which the unrecognized compensation expense is expected to be recognized was approximately 4.5 years.

Investment_Securitites

Investment Securitites	3 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities
	The amortized cost and fair value of investment securities are summarized as follows:
		31-Dec-14
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			(Losses)
	Available for Sale
	U.S. Government and agency securities	$	—	$	—		$	—		$	—
	U.S. Government agency residential mortgage-backed securities	38,329		445			(181		)	38,593
	U.S. Government agency collateralized mortgage obligations	5,233		26			(56		)	5,203
	U.S. Government agency commercial mortgage-backed securities	12,614		25			(82		)	12,557
	Municipal securities	26,895		110			(178		)	26,827
	Total Available for Sale	83,071		606			(497		)	83,180
	Held to Maturity
	Municipal securities	3,025		—			—			3,025
	Total Investment Securities	$	86,096	$	606		$	(497	)	$	86,205
		30-Sep-14
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			(Losses)
	Available for Sale
	U.S. Government and agency securities	$	5,250	$	—		$	(71	)	$	5,179
	U.S. Government agency residential mortgage-backed securities	37,144		389			(337		)	37,196
	U.S. Government agency collateralized mortgage obligations	3,458		30			(56		)	3,432
	U.S. Government agency commercial mortgage-backed securities	10,835		11			(94		)	10,752
	Municipal securities	33,735		280			(228		)	33,787
	Total Available for Sale	90,422		710			(786		)	90,346
	Held to Maturity
	Municipal securities	—		—			—			—
	Total Investment Securities	$	90,422	$	710		$	(786	)	$	90,346
	The amortized cost and fair value of investment securities, by contractual maturity at December 31, 2014 are shown in the following table.  Actual maturities differ from contractual maturities for mortgage-backed securities because the mortgages underlying the securities may be called or repaid without penalty.  Therefore, these securities are not presented in the maturity categories in the table below.
		31-Dec-14
		Amortized Cost		Fair Value
	Available for sale:
	Due in one year or less	$	2,562	$	2,565
	Due after one year through five years	14,064		14,056
	Due after five years through ten years	7,600		7,582
	Due after ten years	2,669		2,624
	U.S. Government agency collateralized mortgage obligations	5,233		5,203
	U.S. Government agency residential mortgage-backed securities	38,329		38,593
	U.S. Government agency commercial mortgage-backed securities	12,614		12,557
		83,071		83,180
	Held to maturity:
	Due in one year or less	566		566
	Due after one year through five years	679		679
	Due after five years through ten years	929		929
	Due after ten years	851		851
		3,025		3,025
	Total	$	86,096	$	86,205
	Proceeds from sales of investment securities during the three months ended December 31, 2014 and 2013, were $12,084 and $0, respectively. Gross realized gains, during the three months ended December 31, 2014 and 2013, on these sales amount to $111 and $0, respectively. Gross realized losses on theses sales were $41 and $0, during the three months ended December 31, 2014 and 2013 respectively.
	There were no securities that were pledged to secure treasury, tax, and loan deposits and other purposes required or permitted by law at December 31, 2014 and September 30, 2014.
	Information pertaining to securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are summarized as follows:
		31-Dec-14
		Less than 12 Months					12 Months or Longer						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Loss			Value			Loss			Value		Loss
	U.S. Government and agency securities	$	—	$	—		$	—		$	—		$	—	$	—
	U.S. Government agency residential mortgage-backed securities	7,262		(17		)	10,169			(164		)	17,431		(181		)
	U.S. Government agency collateralized mortgage obligations	2,047		(11		)	844			(45		)	2,891		(56		)
	U.S Government agency commercial mortgage-backed securities	8,035		(65		)	1,033			(17		)	9,068		(82		)
	Municipal securities	7,270		(25		)	9,789			(153		)	17,059		(178		)
		$	24,614	$	(118	)	$	21,835		$	(379	)	$	46,449	$	(497	)
		30-Sep-14
		Less than 12 Months					12 Months or Longer						Total
	Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
	Value		Loss			Value			Loss			Value		Loss
U.S. Government and agency securities	$	—	$	—		$	5,179		$	(71	)	$	5,179	$	(71	)
U.S. Government agency residential mortgage-backed securities	9,617		(54		)	13,075			(283		)	22,692		(337		)
U.S. Government agency collateralized mortgage obligations	—		—			891			(56		)	891		(56		)
U.S. Government agency commercial mortgage-backed securities	6,235		(73		)	1,033			(21		)	7,268		(94		)
Municipal securities	3,046		(8		)	13,621			(220		)	16,667		(228		)
	$	18,898	$	(135	)	$	33,799		$	(651	)	$	52,697	$	(786	)
At December 31, 2014, the investment portfolio included 45 securities available-for-sale which had been in an unrealized loss position for more than twelve months and 43 securities available-for-sale which had been in an unrealized loss position for less than twelve months. These securities are considered to be acceptable credit risks.  Based upon an evaluation of the available evidence, including recent changes in market rates, credit rating information and information obtained from regulatory filings, management believes the decline in fair value for these securities is temporary.  The Company does not have any current requirement to sell and does not intend to sell these securities prior to any anticipated recovery in fair value.
At September 30, 2014, the investment portfolio included 63 securities available-for-sale which had been in an unrealized loss position for greater than twelve months and 25 securities available-for-sale which had been in an unrealized loss position for less than twelve months.

Loans

Loans	3 Months Ended
	Dec. 31, 2014
Loans and Leases Receivable Disclosure [Abstract]
Loans	Loans
	A summary of the balances of loans follows:
		December 31,				September 30,
		2014				2014
	Real estate:
	Single family	$	148,067			$	135,337
	Multifamily	82,981				76,396
	Commercial real estate	139,554				135,121
	Construction and land development	19,127				16,362
	Total real estate	389,729				363,216
	Commercial business	32,477				37,675
	Consumer:
	Home equity lines of credit	14,126				14,275
	Education	4,560				4,694
	Other	1,828				1,321
	Total consumer	20,514				20,290
	Total loans	442,720				421,181
	Less:
	Net deferred loan fees	324				235
	Allowance for loan losses	4,224				4,072
	Net loans	$	438,172			$	416,874
	The following tables present the contractual aging of the recorded investment in past due loans by class of loans as of December 31, 2014 and September 30, 2014:
	December 31, 2014		Current				30-59 Days				60-89 Days				Loans Past			Total
							Past Due				Past Due				Due 90 Days
															or More
	Single family		$	146,817			$	746			$	119			$	385		$	148,067
	Multifamily		82,981				—				—				—			82,981
	Commercial real estate		139,428				—				—				126			139,554
	Construction and land development		19,096				31				—				—			19,127
	Commercial business		32,477				—				—				—			32,477
	Consumer and other:
	Home equity lines of credit		13,816				24				—				286			14,126
	Education		4,310				73				77				100			4,560
	Other		1,828				—				—				—			1,828
			$	440,753			$	874			$	196			$	897		$	442,720
	September 30, 2014		Current				30-59 Days				60-89 Days				Loans Past			Total
							Past Due				Past Due				Due 90 Days
															or More
	Single family		$	133,102			$	1,623			$	162			$	450		$	135,337
	Multifamily		76,396				—				—				—			76,396
	Commercial real estate		134,584				178				163				196			135,121
	Construction and land development		16,362				—				—				—			16,362
	Commercial business		37,653				—				—				22			37,675
	Consumer and other:
	Home equity lines of credit		13,918				228				—				129			14,275
	Education		4,502				28				44				120			4,694
	Other		1,319				—				—				2			1,321
			$	417,836			$	2,057			$	369			$	919		$	421,181
	There were no loans past due ninety days or more still accruing interest as of December 31, 2014 and September 30, 2014.
	The following table presents the recorded investment in nonaccrual loans by class of loans as of December 31, 2014 and September 30, 2014:
		December 31,				September 30,
		2014				2014
	Single family	$	530			$	791
	Multifamily	—				—
	Commercial real estate	275				350
	Construction and land development	—				—
	Commercial business	—				22
	Consumer and other:
	Home equity lines of credit	302				145
	Education	100				120
	Other	—				2
		$	1,207			$	1,430
	As part of the on-going monitoring of the credit quality of the Company’s loan portfolio, management categorizes loans into risk categories based on relevant information about the ability of the borrowers to service their debt and comply with various terms of their loan agreements.  The Company considers current financial information, historical payment experience, credit documentation, public information and current economic trends.  Generally, all sizeable credits receive a financial review no less than annually to monitor and adjust, if necessary, the credit’s risk profile.  Credits classified as watch and special mention generally receive a review more frequently than annually.
	The Company categorizes loans into the following risk categories based on relevant information about the ability of borrowers to service their debt:
Pass — A pass asset is well protected by the current worth and paying capacity of the obligor (or guarantors, if any) or by the fair value, less costs to acquire and sell in a timely manner, of any underlying collateral.
Watch — A watch asset has potential weaknesses that deserve management’s close attention.  If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date.  Watch assets are not adversely classified and do not expose the Company to sufficient risk to warrant adverse classification.
Special Mention — A special mention asset has characteristics of deterioration in quality exhibited by any number of well-defined weaknesses requiring significant corrective action.  The repayment ability of the borrower has not been validated, or has become marginal or weak and the loan may have exhibited some overdue payments or payment extensions and/or renewals.
Substandard — A substandard asset is an asset with a well-defined weakness that jeopardizes repayment in whole or in part, of the debt.  These credits are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged.  These assets are characterized by the distinct possibility that the Company will or has sustained some loss of principal and/or interest if the deficiencies are not corrected.
Doubtful — A doubtful asset is an asset that has all the weaknesses inherent in the substandard classification with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable.  These credits have a high probability for loss, yet because certain important and reasonably specific pending factors may work toward the strengthening of the asset, its classification of loss is deferred until its more exact status can be determined.
Homogeneous loan types are assessed for credit quality based on the contractual aging status of the loan and payment activity.  In certain cases, based upon payment performance, the loan being related with another commercial type loan or for other reasons, a loan may be categorized into one of the risk categories noted above, unless such loan carries private mortgage insurance (PMI).  Such assessment is completed at the end of each reporting period.
The following tables present the risk category of loans evaluated by internal asset classification based on the most recent analysis performed and the contractual aging as of December 31, 2014 and September 30, 2014:
December 31, 2014		Pass				Watch				Special Mention				Substandard			Doubtful			Total
Single family		$	145,083			$	1,309			$	117			$	1,558		$	—		$	148,067
Multifamily		79,640				2,742				442				157			—			82,981
Commercial real estate		131,737				5,385				853				1,579			—			139,554
Construction and land development		19,122				—				—				5			—			19,127
Commercial business		28,988				3,419				—				70			—			32,477
Consumer and other:
Home equity lines of credit		13,782				—				—				344			—			14,126
Education		4,560				—				—				—			—			4,560
Other		1,828				—				—				—			—			1,828
Total		$	424,740			$	12,855			$	1,412			$	3,713		$	—		$	442,720
September 30, 2014		Pass				Watch				Special Mention				Substandard			Doubtful			Total
Single family		$	132,067			$	1,317			$	118			$	1,835		$	—		$	135,337
Multifamily		73,876				1,915				445				160			—			76,396
Commercial real estate		126,319				6,117				858				1,827			—			135,121
Construction and land development		16,357				—				—				5			—			16,362
Commercial business		34,112				3,459				—				104			—			37,675
Consumer and other:
Home equity lines of credit		14,088				—				—				187			—			14,275
Education		4,694				—				—				—			—			4,694
Other		1,319				—				—				2			—			1,321
		$	402,832			$	12,808			$	1,421			$	4,120		$	—		$	421,181
The following tables provide additional detail of the activity in the allowance for loan losses, by portfolio segment, for the three months ended December 31, 2014 and 2013:
Three Months Ended		Single Family				Multifamily				Commercial				Construction and			Commercial			Consumer			Total
31-Dec-14										Real Estate				Land Development			Business			and Other
Allowance for loan losses:
Beginning balance		$	1,072			$	757			$	1,412			$	301		$	454		$	76		$	4,072
Provision for loan losses		103				175				15				66			(34		)	25			350
Loans charged-off		(161		)		—				(48		)		—			(14		)	(2		)	(225		)
Recoveries		11				—				9				—			6			1			27
Ending balance		$	1,025			$	932			$	1,388			$	367		$	412		$	100		$	4,224
Period-ended amount allocated for:
Individually evaluated for impairment		$	45			$	—			$	—			$	—		$	—		$	58		$	103
Collectively evaluated for impairment		980				932				1,388				367			412			42			4,121
Ending Balance		$	1,025			$	932			$	1,388			$	367		$	412		$	100		$	4,224
Loans:
Individually evaluated for impairment		$	1,542			$	1,894			$	558			$	—		$	—		$	360		$	4,354
Collectively evaluated for impairment		146,525				81,087				138,996				19,127			32,477			20,154			438,366
Ending Balance		$	148,067			$	82,981			$	139,554			$	19,127		$	32,477		$	20,514		$	442,720
Three Months Ended		Single Family				Multifamily				Commercial				Construction and			Commercial			Consumer			Total
31-Dec-13										Real Estate				Land Development			Business			and Other
Allowance for loan losses:
Beginning balance		$	1,873			$	165			$	1,501			$	374		$	211		$	142		$	4,266
Provision for loan losses		6				(27		)		213				(203		)	154			7			150
Loans charged-off		(296		)		—				(232		)		—			(159		)	(27		)	(714		)
Recoveries		15				—				11				—			14			1			41
Ending balance		$	1,598			$	138			$	1,493			$	171		$	220		$	123		$	3,743
Period-ended amount allocated for:
Individually evaluated for impairment		$	—			$	66			$	198			$	—		$	—		$	60		$	324
Collectively evaluated for impairment		1,598				72				1,295				171			220			63			3,419
Ending Balance		$	1,598			$	138			$	1,493			$	171		$	220		$	123		$	3,743
Loans:
Individually evaluated for impairment		$	2,598			$	3,202			$	2,068			$	—		$	—		$	179		$	8,047
Collectively evaluated for impairment		131,021				46,516				112,843				10,014			24,040			17,872			$	342,306
Ending Balance		$	133,619			$	49,718			$	114,911			$	10,014		$	24,040		$	18,051		$	350,353
The following tables present additional detail of impaired loans, segregated by segment, as of and for the three month periods ended December 31, 2014 and 2013.  The unpaid principal balance represents the recorded balance prior to any partial charge-offs.  The recorded investment represents customer balances net of any partial charge-offs recognized on the loans.  The interest income recognized column represents all interest income reported on either a cash or accrual basis after the loan became impaired.
														Three months ended
31-Dec-14		Unpaid				Recorded				Allowance for				Average			Interest
		Principal				Investment				Loan Losses				Recorded			Income
		Balance								Allocated				Investment			Recognized
With no related allowance recorded:
Single family		$	1,363			$	1,148			$	—			$	1,274		$	11
Multifamily		1,998				1,894				—				3,484			20
Commercial real estate		629				558				—				1,118			8
Construction and land development		—				—				—				—			—
Commercial business		—				—				—				—			—
Consumer and other		401				302				—				223			—
With an allowance recorded:
Single family		417				394				45				758			3
Multifamily		—				—				—				86			—
Commercial real estate		—				—				—				90			—
Construction and land development		—				—				—				96			—
Commercial business		—				—				—				—			—
Consumer and other		58				58				58				60			1
		$	4,866			$	4,354			$	103			$	7,189		$	43
														Three months ended
December 31, 2013		Unpaid				Recorded				Allowance for				Average			Interest
		Principal				Investment				Loan Losses				Recorded			Income
		Balance								Allocated				Investment			Recognized
With no related allowance recorded:
Single family		$	3,718			$	2,598			$	—			$	1,999		$	32
Multifamily		3,399				3,033				—				4,053			28
Commercial real estate		1,939				1,870				—				1,773			54
Construction and land development		—				—				—				—			—
Commercial business		—				—				—				—			—
Consumer and other		336				119				—				131			—
With an allowance recorded:
Single family		—				—				—				561			—
Multifamily		169				169				66				171			7
Commercial real estate		198				198				198				189			4
Construction and land development		—				—				—				96			—
Commercial business		—				—				—				—			—
Consumer and other		60				60				60				61			3
		$	9,819			$	8,047			$	324			$	9,034		$	128
The following is a summary of troubled debt restructured loans (TDRs) at December 31, 2014 and September 30, 2014:
	December 31, 2014				September 30,
					2014
Troubled debt restructurings - accrual	$	3,480			$	3,507
Troubled debt restructurings - nonaccrual	—				195
	$	3,480			$	3,702
Modifications of loan terms in a TDR are generally in the form of an extension of payment terms or lowering of the interest rate, although occasionally the Company has reduced the outstanding principal balance.
The following tables presents information related to loans modified in a TDR, by class, during the three months ended December 31, 2014 and 2013:
	Three Months Ended December 31, 2014
				Unpaid				Balance in the ALLL
				Principal
				Balance
	Number of			(at End of Period)				Prior to				At Period End
	Modifications							Modification
Single family	—			$	—			$	—			$	—
	—			$	—			$	—			$	—
	Three Months Ended December 31, 2013
				Unpaid				Balance in the ALLL
				Principal
				Balance
	Number of			(at End of Period)				Prior to				At Period End
	Modifications							Modification
Single family	1			$	88			$	—			$	—
	1			$	88			$	—			$	—
The following table presents a summary of loans modified in a TDR during the three months ended December 31, 2014 and 2013 by class and by type of modification:
		Principal and				Interest Rate Reduction								Adjusted			Reduced
		Interest to												Amortization			Principal
Three Months Ended		Interest Only				To Below				To Interest				Period			Balance			Other (1)			Total
31-Dec-14						Market Rate				Only
Single family		$	—			$	—			$	—			$	—		$	—		$	—		$	—
		$	—			$	—			$	—			$	—		$	—		$	—		$	—
		Principal and				Interest Rate Reduction								Adjusted			Reduced
		Interest to												Amortization			Principal
Three Months Ended		Interest Only				To Below				To Interest				Period			Balance			Other (1)			Total
31-Dec-13						Market Rate				Only
Single family		$	—			$	—			$	—			$	—		$	—		$	88		$	88
		$	—			$	—			$	—			$	—		$	—		$	88		$	88
___________________________________________________________
(1) Other modifications primarily include capitalization of property taxes.
There were no re-defaults of TDR that occurred during the three months ended December 31, 2014 and 2013.
Certain of the Bank’s officers, employees, directors, and their associates are loan customers of the Bank.  As of December 31, 2014 and September 30, 2014, loans of approximately $5,120 and $4,653, respectively, were outstanding to such parties.  These loans were made on substantially the same terms as those prevailing for comparable transactions with other persons and do not involve more than the normal risk of collectability.
An analysis of such loans is as follows:
	Three Months Ended December 31, 2014
Balance, beginning	$	4,653
New loans originated	511
Draws on lines of credit	99
Principal repayments	(143		)
Balance, ending	$	5,120

Real_Estate_Held_for_Sale_and_

Real Estate Held for Sale and Branch Closings	3 Months Ended
	Dec. 31, 2014
Real Estate [Abstract]
Real Estate Held for Sale and Branch Closings	Real Estate Held for Sale and Branch Closings
	The Company designated two office properties as available for sale as of March 31, 2014, one of which housed a branch office which was closed in May 2014. The property was designated as held for sale and transferred from real estate held for investment at its fair value of $810 as of March 31, 2014. The second property, an administrative facility, was transferred from office properties and equipment to real estate held for sale at its fair value of $1,932 as of March 31, 2014. The net loss recognized upon transfer during the quarter ended March 31, 2014 was $1,964. The fair values of the properties were reduced by an additional $0 during the three months ending June 30, 2014, based on pending offers to purchase after exposure to the market. The net loss of $0 and $2,216 is reported as valuation loss on real estate held for sale in the statement of operations for the three and nine months ended June 30, 2014, respectively.
	During the three months ended June 30, 2014, the Company closed an additional branch office, which was operated in a leased facility for which the lease expired in June 2014. The write-off of undepreciated leasehold improvements was $0 and is reported as branch realignment expense in the statement of operations for the three months ended June 30, 2014. Total expenses of $619 for lease buyouts, write-off of undepreciated leasehold improvements and severance pay for the nine months ended June 30, 2014 were included in branch realignment expense.

Deposits

Deposits	3 Months Ended
	Dec. 31, 2014
Deposits [Abstract]
Deposits	Deposits
	The following table presents the composition of deposits as of:
		December 31, 2014				30-Sep-14
		Amount		Percent		Amount		Percent
	Checking Accounts:
	Noninterest bearing	$	88,628	18.75	%	$	77,790	17.1	%
	Interest bearing	134,486		28.45	%	132,925		29.22	%
		223,114		47.2	%	210,715		46.32	%
	Passbook and Statement Savings	120,422		25.48	%	122,227		26.87	%
	Variable Rate Money Market Accounts	31,901		6.75	%	25,615		5.63	%
	Certificates of Deposit	97,251		20.57	%	96,371		21.18	%
		$	472,688	100	%	$	454,928	100	%
	Certificates of deposit over one hundred thousand dollars totaled $38,460 and $34,853 as of December 31, 2014 and September 30, 2014, respectively.

Regulatory_Capital

Regulatory Capital	3 Months Ended
	Dec. 31, 2014
Regulatory Capital Requirements [Abstract]
Regulatory Capital	Regulatory Capital
	The Bank is subject to various regulatory capital requirements administered by federal banking agencies.  Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the Bank’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 Bank’s assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices.  The Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.  Prompt corrective action provisions are not applicable to bank holdings companies.
	Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and Tier 1 capital (as defined) to average assets (as defined).  As of December 31, 2014 and September 30, 2014, the Bank is well capitalized under prompt corrective action regulations.
	The Bank’s actual capital amounts and ratios and those required by the above regulatory standards are as follows:
	At December 31, 2014	Actual						For Capital Adequacy				To Be Well
								Purposes				Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount			Ratio			Amount		Ratio		Amount		Ratio
	Total capital (to risk-weighted assets) - Westbury Bank	$	66,312		15.81	%		$	33,554	8	%	$	41,943	10	%
	Tier 1 capital (to risk-weighted assets) - Westbury Bank	62,088			14.81	%		16,769		4	%	25,154		6	%
	Tier 1 capital (to adjusted total assets) - Westbury Bank	62,088			10.79	%		23,017		4	%	28,771		5	%
	At September 30, 2014	Actual						For Capital Adequacy				To Be Well
								Purposes				Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount			Ratio			Amount		Ratio		Amount		Ratio
	Total capital (to risk-weighted assets) - Westbury Bank	$	65,181		16.18	%		$	32,228	8	%	$	40,285	10	%
	Tier 1 capital (to risk-weighted assets) - Westbury Bank	61,109			15.17	%		16,113		4	%	24,170		6	%
	Tier 1 capital (to adjusted total assets) - Westbury Bank	61,109			11.13	%		21,962		4	%	27,452		5	%
	The following table reconciles the Bank’s stockholders’ equity to regulatory capital as of December 31, 2014 and September 30, 2014:
		December 31,			September 30,
		2014			2014
	Stockholders’ equity of the Bank	$	68,282		$	67,529
	Less: Disallowed servicing assets	(153		)	(162		)
	Unrealized gain (loss) on securities	(69		)	33
	Disallowed investment in subsidiary	(3,296		)	(3,296		)
	Disallowed deferred tax assets	(2,676		)	(2,995		)
	Tier 1 capital and tangible capital	62,088			61,109
	Plus: Allowable general valuation allowances	4,224			4,072
	Risk-based capital	$	66,312		$	65,181

Commitments

Commitments	3 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments	Commitments
	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 involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the consolidated balance sheets.  The contractual amounts of those instruments reflect the extent of involvement the Company has in particular classes of financial instruments.
	The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial instruments for commitments to extend credit is represented by the contractual amount of those instruments.  The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance-sheet instruments.
	The following instruments were outstanding whose contract amounts represent credit risk:
		31-Dec-14		September 30,
				2014
	Commitments to extend mortgage credit:
	Fixed rate	$	938	$	960
	Adjustable rate	1,437		3,339
	Unused commercial loan and home equity lines of credit	90,444		61,325
	Standby letters of credit	967		422
	Commitment to sell loans	2,082		326
	Commitments to extend credit are agreements to lend funds 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.  As some such commitments expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.  The Company evaluates each customer’s creditworthiness on a case-by-case basis.  The Company generally extends credit only on a secured basis.  Collateral obtained varies but consists primarily of single family residences.
	Unfunded commitments under lines of credit are commitments for possible future extensions of credit to existing customers.  These lines of credit may be uncollateralized and ultimately may not be drawn upon to the total extent to which the Company is committed.
	Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party.  Those letters of credit are primarily issued to support public and private borrowing arrangements, and, generally, have terms of one year or less.  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 collateral supporting those commitments if deemed necessary.  In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment.  The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount shown in the summary above.  If the commitment is funded, the Company would be entitled to seek recovery from the customer.  At December 31, 2014 and September 30, 2014, no amounts have been recorded as liabilities for the Company’s potential obligations under these guarantees.
	Commitments to sell loans are commitments to sell single family mortgage loans to investors on the secondary market.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	ASC Topic 820, Fair Value Measurements and Disclosures, defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants.  ASC Topic 820 requires the use of valuation techniques that are consistent with the market approach, the income approach and/or the cost approach.  Inputs to valuation techniques refer to the assumptions that market participants would use in pricing the asset or liability.  Inputs may be observable, meaning those that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources, or unobservable, meaning those that reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability developed based on the best information available in the circumstances.  In that regard, ASC Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:
	Level 1:  Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.
	Level 2:  Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.
	Level 3:  Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.
	A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below.
	Securities available-for-sale:  The fair value of the Company’s securities available-for-sale is determined using Level 2 inputs, which are derived from readily available pricing sources and third-party pricing services for comparable instruments.  The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, treasury yield curves, trading levels, credit information and credit terms, among other factors. In certain cases where Level 1 or Level 2 are not available, securities are classified within Level 3 of the hierarchy.
	Derivatives:  The fair values of the Company’s embedded derivatives related to certain certificates of deposit are determined using inputs that are observable or that can be corroborated by observable market data (such as the S&P 500 Index and the 10- year U.S. Treasury rate) and, therefore, are classified within Level 2 of the valuation hierarchy.
	Assets and liabilities recorded at fair value on a recurring basis:  The following table summarizes assets measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value as of:
						Fair Value Measurements
	31-Dec-14		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Securities available-for-sale
	U.S. Government and agency securities		$	—		$	—		$	—		$	—
	U.S. Government agency residential mortgage-backed securities		38,593			—			38,593			—
	U.S. Government agency collateralized mortgage obligations		5,203			—			5,203			—
	U.S. Government agency commercial mortgage-backed securities		12,557			—			12,557			—
	Municipal securities		26,827						26,827
	Total securities available-for-sale		$	83,180		$	—		$	83,180		$	—
	Derivatives		$	146		$	—		$	146		$	—
	Liabilities
	Derivatives		$	146		$	—		$	146		$	—
						Fair Value Measurements
	September 30, 2014		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets  for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Securities available-for-sale
	U.S. Government and agency securities		$	5,179		$	—		$	5,179		$	—
	U.S. Government agency residential mortgage-backed securities		37,196			—			37,196			—
	U.S. Government agency collateralized mortgage obligations		3,432			—			3,432			—
	U.S. Government agency commercial mortgage-backed securities		10,752			—			10,752			—
	Municipal securities		33,787						33,787
	Total securities available-for-sale		$	90,346		$	—		$	90,346		$	—
	Derivatives		$	87		$	—		$	87		$	—
	Liabilities
	Derivatives		$	87		$	—		$	87		$	—
	The Company did not have any transfers between Level 1, Level 2, and Level 3 of the fair value hierarchy during the three months ended December 31, 2014.  The Company’s policy for determining transfers between levels occurs at the end of the reporting period when circumstances in the underlying valuation criteria change and result in a transfer between levels.
	Assets recorded at fair value on a nonrecurring basis:  The Company may be required, from time to time, to measure certain instruments at fair value on a nonrecurring basis in accordance with U.S. generally accepted accounting principles.
	Impaired loans:  The Company does not record loans at fair value on a recurring basis.  The specific reserves for collateral-dependent impaired loans are based on the fair value of the collateral less estimated costs to sell. The fair value of collateral is determined based on appraisals.  In some cases, adjustments were made to the appraised values due to various factors including age of the appraisal, age of comparables included in the appraisal, and known changes in the market and in the collateral.  When significant adjustments were based on unobservable inputs, the resulting fair value measurement has been categorized as a Level 3 measurement.  Impaired loans with a carrying amount of $452 and $541 have a valuation allowance of $103 and $136 included in the allowance for loan losses to reflect their fair value as of December 31, 2014 and September 30, 2014, respectively.
	Foreclosed real estate:  The Company does not record foreclosed real estate owned at a fair value on a recurring basis.  The fair value of foreclosed real estate was determined using Level 3 inputs based on appraisals or broker pricing opinions.  In some cases, adjustments were made to these values due to various factors including the age of the appraisal, age of comparables included in the appraisal, and known changes in the market and in collateral.  Foreclosed real estate is measured at fair value less estimated costs to sell at the date of foreclosure.  Subsequent to foreclosure, additional writedowns may be recorded based on changes to the fair value of the assets.
	Mortgage servicing rights:  Mortgage servicing rights ("MSRs") do not trade in an active, open market with readily observable prices.  While sales of MSRs do occur, the precise terms and conditions typically are not readily available.  Accordingly, the Company estimates the fair value of MSRs using discounted cash flow models incorporating numerous assumptions from the perspective of market participants including servicing income, servicing costs, market discount rates, prepayments speeds, and default rates.  Due to the nature of the valuation inputs, MSRs are classified within Level 3 of the valuation hierarchy.  As of December 31, 2014, mortgage servicing rights with a carrying amount of $1,688 have a valuation allowance of $160 to reflect their fair value of $1,528.  As of September 30, 2014, mortgage servicing rights with a carrying amount of $1,784 have a valuation allowance of $160 to reflect their fair value of $1,624.
						Fair Value Measurements
	31-Dec-14		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Impaired loans		$	349		$	—		$	—		$	349
	Foreclosed real estate		2,333			—			—			2,333
	Mortgage servicing rights		1,528			—			—			1,528
						Fair Value Measurements
	September 30, 2014		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Impaired loans		$	405		$	—		$	—		$	405
	Foreclosed real estate		2,355			—			—			2,355
	Mortgage servicing rights		1,624			—			—			1,624
Disclosure of fair value information about financial instruments, for which it is practicable to estimate that value, is required whether or not recognized in the consolidated balance sheets.  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 instruments.  Certain financial instruments with a fair value that is not practicable to estimate and all non-financial instruments are excluded from the disclosure requirements.  Accordingly, the aggregate fair value amounts presented do not necessarily represent the underlying value of the Company for assets and liabilities not previously described.  The Company, in estimating its fair value disclosures for financial instruments not described above, used the following methods and assumptions:
Cash and cash equivalents:  The carrying amounts of cash and cash equivalents reported in the consolidated balance sheets approximate those assets’ fair values.
Securities held to maturity: The fair values of securities held to maturity are based on quoted market prices for similar securities, adjusted for differences in security characteristics.
Loans:  For variable-rate mortgage loans that re-price frequently and with no significant change in credit risk, fair values are based on carrying values.  The fair values for fixed rate residential mortgage loans are based on quoted market prices for similar loans sold in conjunction with sale transactions, adjusted for differences in loan characteristics.  The fair values for commercial real estate loans, rental property mortgage loans, and consumer and other loans are estimated using discounted cash flow analyses and using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality.
Loans held for sale:  Fair value of loans held for sale are based on commitments on hand from investors or prevailing market prices.
Federal Home Loan Bank stock:  The carrying amount of FHLB stock approximates its fair value based on the redemption provisions of the FHLB.
Accrued interest receivable and payable:  The carrying amounts of accrued interest receivable and payable approximate their fair values.
Deposits:  The fair value disclosed for interest-bearing and non-interest-bearing checking accounts, savings accounts, and money market accounts are equal to the amount payable on demand at the reporting date (i.e., their carrying amounts).  The fair values of fixed rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities of the outstanding certificates of deposit.
Advances from the Federal Home Loan Bank:  The fair values of FHLB advances are estimated using discounted cash flow analyses, based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements.
Advance payments by borrowers for property taxes and insurance:  The carrying amounts of the advance payments by borrowers for property taxes and insurance approximate their fair values.
Mortgage banking derivatives:  The fair value of commitments to originate mortgage loans held for sale is estimated by comparing the Company’s cost to acquire mortgages and the current price for similar mortgage loans, taking into account the terms of the commitments and the credit worthiness of the counterparties.  The fair value of forward commitments to sell residential mortgage loans is the estimated amount that the Bank would receive or pay to terminate the forward delivery contract at the reporting date based on market prices for similar financial instruments.  The fair value of these derivative financial instruments was not material at December 31, 2014 and September 30, 2014.
The estimated fair values and related carrying amounts of the Company’s financial instruments are as follows:
	31-Dec-14
	Carrying			Estimated Fair			Quoted Prices in			Significant Other			Significant Other
	Amount			Value			Active Markets for			Observable			Unobservable
							Identical Assets			Inputs			Inputs
							(Level 1)			(Level 2)			(Level 3)
Financial assets:
Cash and cash equivalents	$	24,475		$	24,475		$	24,475		$	—		$	—
Securities available for sale	83,180			83,180			—			83,180			—
Securities held to maturity	3,025			3,025			—			3,025			—
Loans, net	438,172			440,204			—			—			440,204
Loans held for sale, net	2,082			2,082			—			2,082			—
Federal Home Loan Bank stock	2,670			2,670			—			—			2,670
Mortgage servicing rights	1,528			1,528			—			—			1,528
Accrued interest receivable	1,748			1,748			1,748			—			—
Derivative asset	146			146			—			146			—
Financial liabilities:
Deposits	472,688			460,304			88,628			—			371,676
Advances from Federal Home Loan Bank	31,000			31,000			—			31,000			—
Advance payments by borrowers for property taxes and insurance	255			255			255			—			—
Accrued interest payable	4			4			4			—			—
Derivative liability	146			146			—			146			—
	30-Sep-14
	Carrying			Estimated Fair			Quoted Prices in			Significant Other			Significant Other
	Amount			Value			Active Markets for			Observable			Unobservable
							Identical Assets			Inputs			Inputs
							(Level 1)			(Level 2)			(Level 3)
Financial assets:
Cash and cash equivalents	$	17,608		$	17,608		$	17,608		$	—		$	—
Securities available for sale	90,346			90,346			—			90,346			—
Loans, net	416,874			415,857			—			—			415,857
Loans held for sale, net	326			326			—			326			—
Federal Home Loan Bank stock	2,670			2,670			—			—			2,670
Mortgage servicing rights	1,624			1,624			—			—			1,624
Accrued interest receivable	1,784			1,784			1,784			—			—
Derivative asset	87			87			—			87			—
Financial liabilities:
Deposits	454,928			442,342			77,790			—			364,552
Advances from Federal Home Loan Bank	17,000			17,000			—			17,000			—
Advance payments by borrowers for property taxes and insurance	5,869			5,869			5,869			—			—
Accrued interest payable	3			3			3			—			—
Derivative liability	87			87			—			87			—

Condensed_Parent_Company_Finan

Condensed Parent Company Financial Information (Notes)	3 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Parent Company Financial Information	Condensed Parent Company Financial Information
	The condensed financial statements of Westbury Bancorp, Inc. (parent company only) are presented below:
	Balance Sheets
	(In thousands)
		December 31,			September 30,
		2014			2014
	Assets
	Cash and interest bearing deposits	$	6,082		$	6,878
	Investments	6,754			6,590
	Loan to ESOP	3,778			3,931
	Investment in subsidiary	71,771			71,131
	Other assets	1,761			1,674
	Total assets	$	90,146		$	90,204
	Liabilities and Stockholders' Equity
	Total liabilities	$	130		$	115
	Stockholders' equity	90,016			90,089
	Total liabilities and stockholders' equity	$	90,146		$	90,204
	Statements of Operations
	(In thousands)
		Three Months Ended December 31,
		2014			2013
	Interest and other income	$	63		$	70
	Interest and other expense	184			187
	Loss before income tax benefit and equity in undistributed net income of subsidiary	(121		)	(117		)
	Income tax benefit	(30		)	(32		)
	Loss before equity in undistributed net income of subsidiary	(91		)	(85		)
	Equity in undistributed net income of subsidiary	538			153
	Net income	$	447		$	68
	Statements of Cash Flows
	(in thousands)
		For Three Months Ended December 31,
		2014			2013
	Cash Flows From Operating Activities
	Net income	$	447		$	68
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net income of subsidiary	(538		)	(153		)
	Net change in other liabilities	15			(19		)
	Net change in other assets	124			130
	Net cash provided by operating activities	48			26
	Cash Flows From Investing Activities
	Purchase of securities	(376		)	(100		)
	Sales and maturities of securities	212			405
	Payments received on ESOP loan	153			183
	Net cash provided by (used in) investing activities	(11		)	488
	Cash Flows From Financing Activities
	Treasury stock transactions, net	(833		)	—
	Net cash used in financing activities	(833		)	—
	Net increase (decrease) in cash	(796		)	514
	Cash
	Beginning of year	6,878			9,271
	End of year	$	6,082		$	9,785

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of calculated earnings per share, basic and diluted	The following table presents a reconciliation of the number of shares used in the calculation of basic and diluted earnings per common share (in thousands, except share and per share data).
		Three Months Ended
		December 31,
		2014			2013
	Net income	$	447		$	68
	Basic potential common shares:
	Weighted average shares outstanding	4,833,308			5,142,541
	Weighted average unallocated ESOP shares	(373,692		)	(393,119		)
	Basic weighted average shares outstanding	4,459,616			4,749.42
	Dilutive effect of equity awards	15,975			—
	Diluted weighted average shares outstanding	4,475,591			4,749,422
	Basic income per share	$	0.1		$	0.01
	Diluted income per share	$	0.1		$	0.01

Compensation_Equity_Plans_Tabl

Compensation Equity Plans (Tables)	3 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Allocation of Share-based Compensation Costs by Plan	The following table summarizes the impact of the Company's share-based payment plans in the financial statements for the periods shown (in thousands):
		Three Months Ended December 31,
		2014				2013
		(In thousands)
	Total cost of stock grant plan during the year	$	155			$	—
	Total cost of stock option plan during the year	46				—
	Total cost of share-based payment plans during the year	$	201			—
	Amount of related income tax benefit recognized in income	$	79			$	—
Schedule of Stock Options Activity	The following table summarizes stock options outstanding for the three months ended December 31, 2014:
		Number of Options		Weighted Average Exercise Price			Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
	Options outstanding as of September 30, 2014	326,224		$	15.2
	Granted	—		—
	Exercised	—		—
	Expired or canceled	—		—
	Forfeited	—		—
	Options outstanding as of December 31, 2014	326,224		$	15.2		9.5	$	391
	Options exercisable as of December 31, 2014	—		$	—		—	$	—
Schedule of Stock Options Valuation Assumptions	The following assumptions were used for options granted during the year ended September 30, 2014:
	Risk-free interest rate	2.1		%
	Expected volatility of Company's stock	9.49		%
	Expected dividend yield	—		%
	Expected life of options (years)	7.5
	Weighted average fair value per option of options granted during the year	$	2.82
Schedule of Restricted Stock Units Award Activity	The following is a summary of changes in restricted shares and units for the three months ended December 31, 2014:
		Number of Shares			Weighted Average Grant Date Fair Value
	Shares and Units Outstanding at September 30, 2014	203,665			$	15.2
	Granted	—			—
	Vested	—			—
	Forfeited	—			—
	Shares and Units Outstanding at December 31, 2014	203,665			$	15.2

Investment_Securitites_Tables

Investment Securitites (Tables)	3 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized costs and fair values of securities available-for-sale	The amortized cost and fair value of investment securities are summarized as follows:
		31-Dec-14
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			(Losses)
	Available for Sale
	U.S. Government and agency securities	$	—	$	—		$	—		$	—
	U.S. Government agency residential mortgage-backed securities	38,329		445			(181		)	38,593
	U.S. Government agency collateralized mortgage obligations	5,233		26			(56		)	5,203
	U.S. Government agency commercial mortgage-backed securities	12,614		25			(82		)	12,557
	Municipal securities	26,895		110			(178		)	26,827
	Total Available for Sale	83,071		606			(497		)	83,180
	Held to Maturity
	Municipal securities	3,025		—			—			3,025
	Total Investment Securities	$	86,096	$	606		$	(497	)	$	86,205
		30-Sep-14
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			(Losses)
	Available for Sale
	U.S. Government and agency securities	$	5,250	$	—		$	(71	)	$	5,179
	U.S. Government agency residential mortgage-backed securities	37,144		389			(337		)	37,196
	U.S. Government agency collateralized mortgage obligations	3,458		30			(56		)	3,432
	U.S. Government agency commercial mortgage-backed securities	10,835		11			(94		)	10,752
	Municipal securities	33,735		280			(228		)	33,787
	Total Available for Sale	90,422		710			(786		)	90,346
	Held to Maturity
	Municipal securities	—		—			—			—
	Total Investment Securities	$	90,422	$	710		$	(786	)	$	90,346
Schedule of amortized cost and estimated fair value of investment securities by contractual maturity	The amortized cost and fair value of investment securities, by contractual maturity at December 31, 2014 are shown in the following table.  Actual maturities differ from contractual maturities for mortgage-backed securities because the mortgages underlying the securities may be called or repaid without penalty.  Therefore, these securities are not presented in the maturity categories in the table below.
		31-Dec-14
		Amortized Cost		Fair Value
	Available for sale:
	Due in one year or less	$	2,562	$	2,565
	Due after one year through five years	14,064		14,056
	Due after five years through ten years	7,600		7,582
	Due after ten years	2,669		2,624
	U.S. Government agency collateralized mortgage obligations	5,233		5,203
	U.S. Government agency residential mortgage-backed securities	38,329		38,593
	U.S. Government agency commercial mortgage-backed securities	12,614		12,557
		83,071		83,180
	Held to maturity:
	Due in one year or less	566		566
	Due after one year through five years	679		679
	Due after five years through ten years	929		929
	Due after ten years	851		851
		3,025		3,025
	Total	$	86,096	$	86,205
Schedule of investment securities in an unrealized loss position	Information pertaining to securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are summarized as follows:
		31-Dec-14
		Less than 12 Months					12 Months or Longer						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Loss			Value			Loss			Value		Loss
	U.S. Government and agency securities	$	—	$	—		$	—		$	—		$	—	$	—
	U.S. Government agency residential mortgage-backed securities	7,262		(17		)	10,169			(164		)	17,431		(181		)
	U.S. Government agency collateralized mortgage obligations	2,047		(11		)	844			(45		)	2,891		(56		)
	U.S Government agency commercial mortgage-backed securities	8,035		(65		)	1,033			(17		)	9,068		(82		)
	Municipal securities	7,270		(25		)	9,789			(153		)	17,059		(178		)
		$	24,614	$	(118	)	$	21,835		$	(379	)	$	46,449	$	(497	)
		30-Sep-14
		Less than 12 Months					12 Months or Longer						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Loss			Value			Loss			Value		Loss
	U.S. Government and agency securities	$	—	$	—		$	5,179		$	(71	)	$	5,179	$	(71	)
	U.S. Government agency residential mortgage-backed securities	9,617		(54		)	13,075			(283		)	22,692		(337		)
	U.S. Government agency collateralized mortgage obligations	—		—			891			(56		)	891		(56		)
	U.S. Government agency commercial mortgage-backed securities	6,235		(73		)	1,033			(21		)	7,268		(94		)
	Municipal securities	3,046		(8		)	13,621			(220		)	16,667		(228		)
		$	18,898	$	(135	)	$	33,799		$	(651	)	$	52,697	$	(786	)

Loans_Tables

Loans (Tables)	3 Months Ended
	Dec. 31, 2014
Loans
Summary of balances of loans	A summary of the balances of loans follows:
		December 31,				September 30,
		2014				2014
	Real estate:
	Single family	$	148,067			$	135,337
	Multifamily	82,981				76,396
	Commercial real estate	139,554				135,121
	Construction and land development	19,127				16,362
	Total real estate	389,729				363,216
	Commercial business	32,477				37,675
	Consumer:
	Home equity lines of credit	14,126				14,275
	Education	4,560				4,694
	Other	1,828				1,321
	Total consumer	20,514				20,290
	Total loans	442,720				421,181
	Less:
	Net deferred loan fees	324				235
	Allowance for loan losses	4,224				4,072
	Net loans	$	438,172			$	416,874
Schedule of contractual aging of recorded investment in past due loans	The following tables present the contractual aging of the recorded investment in past due loans by class of loans as of December 31, 2014 and September 30, 2014:
	December 31, 2014		Current				30-59 Days				60-89 Days				Loans Past			Total
							Past Due				Past Due				Due 90 Days
															or More
	Single family		$	146,817			$	746			$	119			$	385		$	148,067
	Multifamily		82,981				—				—				—			82,981
	Commercial real estate		139,428				—				—				126			139,554
	Construction and land development		19,096				31				—				—			19,127
	Commercial business		32,477				—				—				—			32,477
	Consumer and other:
	Home equity lines of credit		13,816				24				—				286			14,126
	Education		4,310				73				77				100			4,560
	Other		1,828				—				—				—			1,828
			$	440,753			$	874			$	196			$	897		$	442,720
	September 30, 2014		Current				30-59 Days				60-89 Days				Loans Past			Total
							Past Due				Past Due				Due 90 Days
															or More
	Single family		$	133,102			$	1,623			$	162			$	450		$	135,337
	Multifamily		76,396				—				—				—			76,396
	Commercial real estate		134,584				178				163				196			135,121
	Construction and land development		16,362				—				—				—			16,362
	Commercial business		37,653				—				—				22			37,675
	Consumer and other:
	Home equity lines of credit		13,918				228				—				129			14,275
	Education		4,502				28				44				120			4,694
	Other		1,319				—				—				2			1,321
			$	417,836			$	2,057			$	369			$	919		$	421,181
Schedule of Loans and Leases Receivable, Related Parties [Table Text Block]	An analysis of such loans is as follows:
		Three Months Ended December 31, 2014
	Balance, beginning	$	4,653
	New loans originated	511
	Draws on lines of credit	99
	Principal repayments	(143		)
	Balance, ending	$	5,120
Schedule of risk category of loans	The following tables present the risk category of loans evaluated by internal asset classification based on the most recent analysis performed and the contractual aging as of December 31, 2014 and September 30, 2014:
	December 31, 2014		Pass				Watch				Special Mention				Substandard			Doubtful			Total
	Single family		$	145,083			$	1,309			$	117			$	1,558		$	—		$	148,067
	Multifamily		79,640				2,742				442				157			—			82,981
	Commercial real estate		131,737				5,385				853				1,579			—			139,554
	Construction and land development		19,122				—				—				5			—			19,127
	Commercial business		28,988				3,419				—				70			—			32,477
	Consumer and other:
	Home equity lines of credit		13,782				—				—				344			—			14,126
	Education		4,560				—				—				—			—			4,560
	Other		1,828				—				—				—			—			1,828
	Total		$	424,740			$	12,855			$	1,412			$	3,713		$	—		$	442,720
	September 30, 2014		Pass				Watch				Special Mention				Substandard			Doubtful			Total
	Single family		$	132,067			$	1,317			$	118			$	1,835		$	—		$	135,337
	Multifamily		73,876				1,915				445				160			—			76,396
	Commercial real estate		126,319				6,117				858				1,827			—			135,121
	Construction and land development		16,357				—				—				5			—			16,362
	Commercial business		34,112				3,459				—				104			—			37,675
	Consumer and other:
	Home equity lines of credit		14,088				—				—				187			—			14,275
	Education		4,694				—				—				—			—			4,694
	Other		1,319				—				—				2			—			1,321
			$	402,832			$	12,808			$	1,421			$	4,120		$	—		$	421,181
Schedule of activity in the allowance for loan losses, by portfolio segment	The following tables provide additional detail of the activity in the allowance for loan losses, by portfolio segment, for the three months ended December 31, 2014 and 2013:
	Three Months Ended		Single Family				Multifamily				Commercial				Construction and			Commercial			Consumer			Total
	31-Dec-14										Real Estate				Land Development			Business			and Other
	Allowance for loan losses:
	Beginning balance		$	1,072			$	757			$	1,412			$	301		$	454		$	76		$	4,072
	Provision for loan losses		103				175				15				66			(34		)	25			350
	Loans charged-off		(161		)		—				(48		)		—			(14		)	(2		)	(225		)
	Recoveries		11				—				9				—			6			1			27
	Ending balance		$	1,025			$	932			$	1,388			$	367		$	412		$	100		$	4,224
	Period-ended amount allocated for:
	Individually evaluated for impairment		$	45			$	—			$	—			$	—		$	—		$	58		$	103
	Collectively evaluated for impairment		980				932				1,388				367			412			42			4,121
	Ending Balance		$	1,025			$	932			$	1,388			$	367		$	412		$	100		$	4,224
	Loans:
	Individually evaluated for impairment		$	1,542			$	1,894			$	558			$	—		$	—		$	360		$	4,354
	Collectively evaluated for impairment		146,525				81,087				138,996				19,127			32,477			20,154			438,366
	Ending Balance		$	148,067			$	82,981			$	139,554			$	19,127		$	32,477		$	20,514		$	442,720
	Three Months Ended		Single Family				Multifamily				Commercial				Construction and			Commercial			Consumer			Total
	31-Dec-13										Real Estate				Land Development			Business			and Other
	Allowance for loan losses:
	Beginning balance		$	1,873			$	165			$	1,501			$	374		$	211		$	142		$	4,266
	Provision for loan losses		6				(27		)		213				(203		)	154			7			150
	Loans charged-off		(296		)		—				(232		)		—			(159		)	(27		)	(714		)
	Recoveries		15				—				11				—			14			1			41
	Ending balance		$	1,598			$	138			$	1,493			$	171		$	220		$	123		$	3,743
	Period-ended amount allocated for:
	Individually evaluated for impairment		$	—			$	66			$	198			$	—		$	—		$	60		$	324
	Collectively evaluated for impairment		1,598				72				1,295				171			220			63			3,419
	Ending Balance		$	1,598			$	138			$	1,493			$	171		$	220		$	123		$	3,743
	Loans:
	Individually evaluated for impairment		$	2,598			$	3,202			$	2,068			$	—		$	—		$	179		$	8,047
	Collectively evaluated for impairment		131,021				46,516				112,843				10,014			24,040			17,872			$	342,306
	Ending Balance		$	133,619			$	49,718			$	114,911			$	10,014		$	24,040		$	18,051		$	350,353
Schedule of impaired loans
															Three months ended
	31-Dec-14		Unpaid				Recorded				Allowance for				Average			Interest
			Principal				Investment				Loan Losses				Recorded			Income
			Balance								Allocated				Investment			Recognized
	With no related allowance recorded:
	Single family		$	1,363			$	1,148			$	—			$	1,274		$	11
	Multifamily		1,998				1,894				—				3,484			20
	Commercial real estate		629				558				—				1,118			8
	Construction and land development		—				—				—				—			—
	Commercial business		—				—				—				—			—
	Consumer and other		401				302				—				223			—
	With an allowance recorded:
	Single family		417				394				45				758			3
	Multifamily		—				—				—				86			—
	Commercial real estate		—				—				—				90			—
	Construction and land development		—				—				—				96			—
	Commercial business		—				—				—				—			—
	Consumer and other		58				58				58				60			1
			$	4,866			$	4,354			$	103			$	7,189		$	43
															Three months ended
	December 31, 2013		Unpaid				Recorded				Allowance for				Average			Interest
			Principal				Investment				Loan Losses				Recorded			Income
			Balance								Allocated				Investment			Recognized
	With no related allowance recorded:
	Single family		$	3,718			$	2,598			$	—			$	1,999		$	32
	Multifamily		3,399				3,033				—				4,053			28
	Commercial real estate		1,939				1,870				—				1,773			54
	Construction and land development		—				—				—				—			—
	Commercial business		—				—				—				—			—
	Consumer and other		336				119				—				131			—
	With an allowance recorded:
	Single family		—				—				—				561			—
	Multifamily		169				169				66				171			7
	Commercial real estate		198				198				198				189			4
	Construction and land development		—				—				—				96			—
	Commercial business		—				—				—				—			—
	Consumer and other		60				60				60				61			3
			$	9,819			$	8,047			$	324			$	9,034		$	128
Schedule of loans modified in a TDR, by class	The following tables presents information related to loans modified in a TDR, by class, during the three months ended December 31, 2014 and 2013:
		Three Months Ended December 31, 2014
					Unpaid				Balance in the ALLL
					Principal
					Balance
		Number of			(at End of Period)				Prior to				At Period End
		Modifications							Modification
	Single family	—			$	—			$	—			$	—
		—			$	—			$	—			$	—
		Three Months Ended December 31, 2013
					Unpaid				Balance in the ALLL
					Principal
					Balance
		Number of			(at End of Period)				Prior to				At Period End
		Modifications							Modification
	Single family	1			$	88			$	—			$	—
		1			$	88			$	—			$	—
	The following table presents a summary of loans modified in a TDR during the three months ended December 31, 2014 and 2013 by class and by type of modification:
			Principal and				Interest Rate Reduction								Adjusted			Reduced
			Interest to												Amortization			Principal
	Three Months Ended		Interest Only				To Below				To Interest				Period			Balance			Other (1)			Total
	31-Dec-14						Market Rate				Only
	Single family		$	—			$	—			$	—			$	—		$	—		$	—		$	—
			$	—			$	—			$	—			$	—		$	—		$	—		$	—
			Principal and				Interest Rate Reduction								Adjusted			Reduced
			Interest to												Amortization			Principal
	Three Months Ended		Interest Only				To Below				To Interest				Period			Balance			Other (1)			Total
	31-Dec-13						Market Rate				Only
	Single family		$	—			$	—			$	—			$	—		$	—		$	88		$	88
			$	—			$	—			$	—			$	—		$	—		$	88		$	88
	___________________________________________________________
	(1) Other modifications primarily include capitalization of property taxes.
Past due loans
Loans
Schedule of recorded investment by accrual status	The following table presents the recorded investment in nonaccrual loans by class of loans as of December 31, 2014 and September 30, 2014:
		December 31,				September 30,
		2014				2014
	Single family	$	530			$	791
	Multifamily	—				—
	Commercial real estate	275				350
	Construction and land development	—				—
	Commercial business	—				22
	Consumer and other:
	Home equity lines of credit	302				145
	Education	100				120
	Other	—				2
		$	1,207			$	1,430
Troubled debt restructurings
Loans
Schedule of recorded investment by accrual status	The following is a summary of troubled debt restructured loans (TDRs) at December 31, 2014 and September 30, 2014:
		December 31, 2014				September 30,
						2014
	Troubled debt restructurings - accrual	$	3,480			$	3,507
	Troubled debt restructurings - nonaccrual	—				195
		$	3,480			$	3,702

Deposits_Tables

Deposits (Tables)	3 Months Ended
	Dec. 31, 2014
Deposits [Abstract]
Schedule of composition of deposits	The following table presents the composition of deposits as of:
		December 31, 2014				30-Sep-14
		Amount		Percent		Amount		Percent
	Checking Accounts:
	Noninterest bearing	$	88,628	18.75	%	$	77,790	17.1	%
	Interest bearing	134,486		28.45	%	132,925		29.22	%
		223,114		47.2	%	210,715		46.32	%
	Passbook and Statement Savings	120,422		25.48	%	122,227		26.87	%
	Variable Rate Money Market Accounts	31,901		6.75	%	25,615		5.63	%
	Certificates of Deposit	97,251		20.57	%	96,371		21.18	%
		$	472,688	100	%	$	454,928	100	%

Regulatory_Capital_Tables

Regulatory Capital (Tables)	3 Months Ended
	Dec. 31, 2014
Regulatory Capital Requirements [Abstract]
Schedule of actual capital amounts and ratios and those required by the above regulatory standards	The Bank’s actual capital amounts and ratios and those required by the above regulatory standards are as follows:
	At December 31, 2014	Actual						For Capital Adequacy				To Be Well
								Purposes				Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount			Ratio			Amount		Ratio		Amount		Ratio
	Total capital (to risk-weighted assets) - Westbury Bank	$	66,312		15.81	%		$	33,554	8	%	$	41,943	10	%
	Tier 1 capital (to risk-weighted assets) - Westbury Bank	62,088			14.81	%		16,769		4	%	25,154		6	%
	Tier 1 capital (to adjusted total assets) - Westbury Bank	62,088			10.79	%		23,017		4	%	28,771		5	%
	At September 30, 2014	Actual						For Capital Adequacy				To Be Well
								Purposes				Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount			Ratio			Amount		Ratio		Amount		Ratio
	Total capital (to risk-weighted assets) - Westbury Bank	$	65,181		16.18	%		$	32,228	8	%	$	40,285	10	%
	Tier 1 capital (to risk-weighted assets) - Westbury Bank	61,109			15.17	%		16,113		4	%	24,170		6	%
	Tier 1 capital (to adjusted total assets) - Westbury Bank	61,109			11.13	%		21,962		4	%	27,452		5	%
Schedule of reconciliation of the Bank's stockholders' equity to regulatory capital	The following table reconciles the Bank’s stockholders’ equity to regulatory capital as of December 31, 2014 and September 30, 2014:
		December 31,			September 30,
		2014			2014
	Stockholders’ equity of the Bank	$	68,282		$	67,529
	Less: Disallowed servicing assets	(153		)	(162		)
	Unrealized gain (loss) on securities	(69		)	33
	Disallowed investment in subsidiary	(3,296		)	(3,296		)
	Disallowed deferred tax assets	(2,676		)	(2,995		)
	Tier 1 capital and tangible capital	62,088			61,109
	Plus: Allowable general valuation allowances	4,224			4,072
	Risk-based capital	$	66,312		$	65,181

Commitments_Tables

Commitments (Tables)	3 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of financial instruments whose contract amounts represent credit risk	The following instruments were outstanding whose contract amounts represent credit risk:
		31-Dec-14		September 30,
				2014
	Commitments to extend mortgage credit:
	Fixed rate	$	938	$	960
	Adjustable rate	1,437		3,339
	Unused commercial loan and home equity lines of credit	90,444		61,325
	Standby letters of credit	967		422
	Commitment to sell loans	2,082		326

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities measured at fair value on a recurring basis	The following table summarizes assets measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value as of:
						Fair Value Measurements
	31-Dec-14		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Securities available-for-sale
	U.S. Government and agency securities		$	—		$	—		$	—		$	—
	U.S. Government agency residential mortgage-backed securities		38,593			—			38,593			—
	U.S. Government agency collateralized mortgage obligations		5,203			—			5,203			—
	U.S. Government agency commercial mortgage-backed securities		12,557			—			12,557			—
	Municipal securities		26,827						26,827
	Total securities available-for-sale		$	83,180		$	—		$	83,180		$	—
	Derivatives		$	146		$	—		$	146		$	—
	Liabilities
	Derivatives		$	146		$	—		$	146		$	—
						Fair Value Measurements
	September 30, 2014		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets  for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Securities available-for-sale
	U.S. Government and agency securities		$	5,179		$	—		$	5,179		$	—
	U.S. Government agency residential mortgage-backed securities		37,196			—			37,196			—
	U.S. Government agency collateralized mortgage obligations		3,432			—			3,432			—
	U.S. Government agency commercial mortgage-backed securities		10,752			—			10,752			—
	Municipal securities		33,787						33,787
	Total securities available-for-sale		$	90,346		$	—		$	90,346		$	—
	Derivatives		$	87		$	—		$	87		$	—
	Liabilities
	Derivatives		$	87		$	—		$	87		$	—
Schedule of assets measured at fair value on a nonrecurring basis
						Fair Value Measurements
	31-Dec-14		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Impaired loans		$	349		$	—		$	—		$	349
	Foreclosed real estate		2,333			—			—			2,333
	Mortgage servicing rights		1,528			—			—			1,528
						Fair Value Measurements
	September 30, 2014		Total			Quoted Prices in			Significant Other			Significant Other
						Active Markets for			Observable Inputs			Unobservable
						Identical Assets			(Level 2)			Inputs (Level 3)
						(Level 1)
	Assets
	Impaired loans		$	405		$	—		$	—		$	405
	Foreclosed real estate		2,355			—			—			2,355
	Mortgage servicing rights		1,624			—			—			1,624
Schedule of estimated fair values and related carrying amounts of the entity's financial instruments	The estimated fair values and related carrying amounts of the Company’s financial instruments are as follows:
		31-Dec-14
		Carrying			Estimated Fair			Quoted Prices in			Significant Other			Significant Other
		Amount			Value			Active Markets for			Observable			Unobservable
								Identical Assets			Inputs			Inputs
								(Level 1)			(Level 2)			(Level 3)
	Financial assets:
	Cash and cash equivalents	$	24,475		$	24,475		$	24,475		$	—		$	—
	Securities available for sale	83,180			83,180			—			83,180			—
	Securities held to maturity	3,025			3,025			—			3,025			—
	Loans, net	438,172			440,204			—			—			440,204
	Loans held for sale, net	2,082			2,082			—			2,082			—
	Federal Home Loan Bank stock	2,670			2,670			—			—			2,670
	Mortgage servicing rights	1,528			1,528			—			—			1,528
	Accrued interest receivable	1,748			1,748			1,748			—			—
	Derivative asset	146			146			—			146			—
	Financial liabilities:
	Deposits	472,688			460,304			88,628			—			371,676
	Advances from Federal Home Loan Bank	31,000			31,000			—			31,000			—
	Advance payments by borrowers for property taxes and insurance	255			255			255			—			—
	Accrued interest payable	4			4			4			—			—
	Derivative liability	146			146			—			146			—
		30-Sep-14
		Carrying			Estimated Fair			Quoted Prices in			Significant Other			Significant Other
		Amount			Value			Active Markets for			Observable			Unobservable
								Identical Assets			Inputs			Inputs
								(Level 1)			(Level 2)			(Level 3)
	Financial assets:
	Cash and cash equivalents	$	17,608		$	17,608		$	17,608		$	—		$	—
	Securities available for sale	90,346			90,346			—			90,346			—
	Loans, net	416,874			415,857			—			—			415,857
	Loans held for sale, net	326			326			—			326			—
	Federal Home Loan Bank stock	2,670			2,670			—			—			2,670
	Mortgage servicing rights	1,624			1,624			—			—			1,624
	Accrued interest receivable	1,784			1,784			1,784			—			—
	Derivative asset	87			87			—			87			—
	Financial liabilities:
	Deposits	454,928			442,342			77,790			—			364,552
	Advances from Federal Home Loan Bank	17,000			17,000			—			17,000			—
	Advance payments by borrowers for property taxes and insurance	5,869			5,869			5,869			—			—
	Accrued interest payable	3			3			3			—			—
	Derivative liability	87			87			—			87			—

Condensed_Parent_Company_Finan1

Condensed Parent Company Financial Information (Tables)	3 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheet
	Balance Sheets
	(In thousands)
		December 31,			September 30,
		2014			2014
	Assets
	Cash and interest bearing deposits	$	6,082		$	6,878
	Investments	6,754			6,590
	Loan to ESOP	3,778			3,931
	Investment in subsidiary	71,771			71,131
	Other assets	1,761			1,674
	Total assets	$	90,146		$	90,204
	Liabilities and Stockholders' Equity
	Total liabilities	$	130		$	115
	Stockholders' equity	90,016			90,089
	Total liabilities and stockholders' equity	$	90,146		$	90,204
Condensed Income Statement
	Statements of Operations
	(In thousands)
		Three Months Ended December 31,
		2014			2013
	Interest and other income	$	63		$	70
	Interest and other expense	184			187
	Loss before income tax benefit and equity in undistributed net income of subsidiary	(121		)	(117		)
	Income tax benefit	(30		)	(32		)
	Loss before equity in undistributed net income of subsidiary	(91		)	(85		)
	Equity in undistributed net income of subsidiary	538			153
	Net income	$	447		$	68
Condensed Cash Flow Statement
	Statements of Cash Flows
	(in thousands)
		For Three Months Ended December 31,
		2014			2013
	Cash Flows From Operating Activities
	Net income	$	447		$	68
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net income of subsidiary	(538		)	(153		)
	Net change in other liabilities	15			(19		)
	Net change in other assets	124			130
	Net cash provided by operating activities	48			26
	Cash Flows From Investing Activities
	Purchase of securities	(376		)	(100		)
	Sales and maturities of securities	212			405
	Payments received on ESOP loan	153			183
	Net cash provided by (used in) investing activities	(11		)	488
	Cash Flows From Financing Activities
	Treasury stock transactions, net	(833		)	—
	Net cash used in financing activities	(833		)	—
	Net increase (decrease) in cash	(796		)	514
	Cash
	Beginning of year	6,878			9,271
	End of year	$	6,082		$	9,785

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income	$447	$68	[1]
Basic potential common shares:
Weighted average shares outstanding (in shares)	4,833,308	5,142,541	[1]
Weighted average unallocated ESOP shares (in shares)	-373,692	-393,119	[1]
Basic weighted average shares outstanding (in shares)	4,459,616	4,749,422	[1]
Dilutive potential common shares (in shares)	15,975	0	[1]
Diluted weighted average shares outstanding (in shares)	4,475,591	4,749,422	[1]
Basic loss per share (in dollars per share)	$0.10	$0.01	[1]
Diluted loss per share (in dollars per share)	$0.10	$0.01	[1]
[1]	Three Months EndedDecember 31, 2014 2013Net income$447 $68Basic potential common shares: Weighted average shares outstanding4,833,308 5,142,541Weighted average unallocated ESOP shares(373,692) (393,119)Basic weighted average shares outstanding4,459,616 4,749.422Dilutive effect of equity awards15,975 —Diluted weighted average shares outstanding4,475,591 4,749,422Basic income per share$0.10 $0.01Diluted income per share$0.10 $0.01

Employee_Stock_Ownership_Plan_

Employee Stock Ownership Plan (Details) (USD $)	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Apr. 11, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock Ownership Plan (ESOP), Debt Structure, Indirect Loan, Amount				$4,100,000
ESOP committed-to-be-released shares, during period	5,142
ESOP compensation expense	112,000	95,000
Allocated shares	17,392		20,570
Shares released and available for allocation	20,570		0
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares	0		15,428
Unreleased shares	370,263		375,405
Total ESOP shares	408,225		411,403	411,403
employee stock ownership plan, price per share				$10
Fair value of unreleased shares	$6,072,000		$5,650,000

Compensation_Equity_Plans_Cost

Compensation Equity Plans Cost of Share-based Payment Plans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total cost of stock grant plan during the year	$155	$0
Total cost of stock option plan during the year	46	0
Total cost of share-based payment plans during the year	201	0
Amount of related income tax benefit recognized in income	$79	$0

Compensation_Equity_Plans_Stoc

Compensation Equity Plans Stock Option Activity (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014
Number of Options
Options outstanding as of September 30, 2014	326,224
Granted	0
Exercised	0
Expired or canceled	0
Forfeited	0
Options outstanding as of December 31, 2014	326,224
Options exercisable as of December 31, 2014	0
Weighted Average Exercise Price
Options outstanding as of September 30, 2014	$15.20
Granted	$0
Exercised	$0
Expired or canceled	$0
Forfeited	$0
Options outstanding as of December 31, 2014	$15.20
Options exercisable as of December 31, 2014	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, Weighted Average Remaining Contractual Term	9 years 6 months
Outstanding, Aggregate Intrinsic Value	$391
Options Exercisable, Aggregate Intrinsic Value	$0

Compensation_Equity_Plans_Assu

Compensation Equity Plans Assumptions (Details) (USD $)	3 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	2.10%
Expected volatility of Company's stock	9.49%
Expected dividend yield	0.00%
Expected life of options (years)	7 years 6 months
Weighted average fair value per option of options granted during the year	$2.82

Compensation_Equity_Plans_Rest

Compensation Equity Plans Restricted Shares (Details) (Restricted Shares and Units, USD $)	3 Months Ended
	Dec. 31, 2014
Restricted Shares and Units
Number of Shares
Shares and Units Outstanding at September 30, 2014	203,665
Granted	0
Vested	0
Forfeited	0
Shares and Units Outstanding at December 31, 2014	203,665
Weighted Average Grant Date Fair Value
Shares and Units Outstanding at September 30, 2014	$15.20
Granted	$0
Vested	$0
Forfeited	$0
Shares and Units Outstanding at December 31, 2014	$15.20

Compensation_Equity_Plans_Narr

Compensation Equity Plans Narrative (Details) (USD $)	3 Months Ended
	Dec. 31, 2014	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, minimum	5 years
Vesting period, maximum	10 years
Restricted share vesting period	5 years
Intrinsic value of options exercised during the period	$0
Compensation cost not yet recognized	3,600,000
Period for recognition	4 years 5 months 13 days
Restricted Shares and Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of restricted shares vested during the period	$0
Westbury Bancorp Inc 2014 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized		509,162
Westbury Bancorp Inc 2014 Equity Incentive Plan | Restricted Shares and Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized		203,665
Number of shares available for grant-stock grants	0
Westbury Bancorp Inc 2014 Equity Incentive Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant-stock options	182,938

Investment_Securitites_Details

Investment Securitites (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
Securities Available for Sale
Amortized Cost	$83,071	$90,422
Gross Unrealized Gains	606	710
Gross Unrealized (Losses)	-497	-786
Fair Value	83,180	90,346
Held-to-maturity Securities	3,025	0
Investment Securities, Amortized Cost Basis	86,096	90,422
Investment Securities, Accumulated Gross Unrealized Gain, before Tax	606	710
Investment Securities, Accumulated Gross Unrealized Loss, before Tax	-497	-786
Investment Securities	86,205	90,346
U.S. Government and agency securities
Securities Available for Sale
Amortized Cost	0	5,250
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	-71
Fair Value	0	5,179
U.S. Government agency residential mortgage-backed securities
Securities Available for Sale
Amortized Cost	38,329	37,144
Gross Unrealized Gains	445	389
Gross Unrealized (Losses)	-181	-337
Fair Value	38,593	37,196
U.S. Government agency collateralized mortgage obligations
Securities Available for Sale
Amortized Cost	5,233	3,458
Gross Unrealized Gains	26	30
Gross Unrealized (Losses)	-56	-56
Fair Value	5,203	3,432
Commercial Mortgage Backed Securities [Member]
Securities Available for Sale
Amortized Cost	12,614	10,835
Gross Unrealized Gains	25	11
Gross Unrealized (Losses)	-82	-94
Fair Value	12,557	10,752
Municipal securities
Securities Available for Sale
Amortized Cost	26,895	33,735
Gross Unrealized Gains	110	280
Gross Unrealized (Losses)	-178	-228
Fair Value	26,827	33,787
Held-to-maturity Securities	3,025	0
Held to Maturity Securities, Accumulated Gross Unrealized Gain, before Tax	0	0
Held to Maturity, Accumulated Gross Unrealized Loss, before Tax	$0	$0

Investment_Securitites_Details1

Investment Securitites (Details 2) (USD $)	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Available for Sale, Amortized Cost
Due in one year or less	$2,562,000
Due after one year through five years	14,064,000
Due after five years through ten years	7,600,000
Due after ten years	2,669,000
Total	83,071,000
Available for Sale, Fair Value
Due in one year or less	2,565,000
Due after one year through five years	14,056,000
Due after five years through ten years	7,582,000
Due after ten years	2,624,000
Fair Value	83,180,000		90,346,000
Other disclosures
Proceeds from sales of securities available-for-sale	12,084,000	0
Gross realized gains on the sale of securities available-for-sale	111,000	0
Gross realized losses on the sale of securities available-for-sale	0	0
Securities pledged to secure treasury, tax, and loan deposits and other purposes	0		0
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	566,000
Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value	566,000
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	679,000
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	679,000
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	929,000
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	929,000
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	851,000
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	851,000
Held-to-maturity Securities	3,025,000		0
Investment Securities, Amortized Cost Basis	86,096,000		90,422,000
Investment Securities	86,205,000		90,346,000
U.S. Government agency collateralized mortgage obligations
Available for Sale, Amortized Cost
U.S. Government agency securities	5,233,000
Available for Sale, Fair Value
U.S. Government agency securities	5,203,000
Fair Value	5,203,000		3,432,000
U.S. Government agency residential mortgage-backed securities
Available for Sale, Amortized Cost
U.S. Government agency securities	38,329,000
Available for Sale, Fair Value
U.S. Government agency securities	38,593,000
Fair Value	38,593,000		37,196,000
Commercial Mortgage Backed Securities [Member]
Available for Sale, Amortized Cost
U.S. Government agency securities	12,614,000
Available for Sale, Fair Value
U.S. Government agency securities	12,557,000
Fair Value	12,557,000		10,752,000
Municipal securities
Available for Sale, Fair Value
Fair Value	26,827,000		33,787,000
Other disclosures
Held-to-maturity Securities	$3,025,000		$0

Investment_Securitites_Details2

Investment Securitites (Details 3) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified	security	security
Total temporary impaired securities
Less than 12 months, Fair Value	$24,614	$18,898
Less than 12 months, Unrealized Losses	-118	-135
12 months or longer, Fair Value	21,835	33,799
12 months or longer, Unrealized Losses	-379	-651
Total, Fair Value	46,449	52,697
Total, Unrealized Losses	-497	-786
Number of securities in an unrealized loss position, greater than twelve months	45	63
Number of securities in an unrealized loss position, less than twelve months	43	25
U.S. Government and agency securities
Total temporary impaired securities
Less than 12 months, Fair Value	0	0
Less than 12 months, Unrealized Losses	0	0
12 months or longer, Fair Value	0	5,179
12 months or longer, Unrealized Losses	0	-71
Total, Fair Value	0	5,179
Total, Unrealized Losses	0	-71
U.S. Government agency residential mortgage-backed securities
Total temporary impaired securities
Less than 12 months, Fair Value	7,262	9,617
Less than 12 months, Unrealized Losses	-17	-54
12 months or longer, Fair Value	10,169	13,075
12 months or longer, Unrealized Losses	-164	-283
Total, Fair Value	17,431	22,692
Total, Unrealized Losses	-181	-337
U.S. Government agency collateralized mortgage obligations
Total temporary impaired securities
Less than 12 months, Fair Value	2,047	0
Less than 12 months, Unrealized Losses	-11	0
12 months or longer, Fair Value	844	891
12 months or longer, Unrealized Losses	-45	-56
Total, Fair Value	2,891	891
Total, Unrealized Losses	-56	-56
Commercial Mortgage Backed Securities [Member]
Total temporary impaired securities
Less than 12 months, Fair Value	8,035	6,235
Less than 12 months, Unrealized Losses	-65	-73
12 months or longer, Fair Value	1,033	1,033
12 months or longer, Unrealized Losses	-17	-21
Total, Fair Value	9,068	7,268
Total, Unrealized Losses	-82	-94
Municipal securities
Total temporary impaired securities
Less than 12 months, Fair Value	7,270	3,046
Less than 12 months, Unrealized Losses	-25	-8
12 months or longer, Fair Value	9,789	13,621
12 months or longer, Unrealized Losses	-153	-220
Total, Fair Value	17,059	16,667
Total, Unrealized Losses	($178)	($228)

Loans_Details

Loans (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Loans
Loans	$442,720	$421,181	$350,353
Less: Net deferred loan fees	324	235
Less: Allowance for loan losses	4,224	4,072	3,743	4,266
Net loans	438,172	416,874
Real Estate
Loans
Loans	389,729	363,216
Single family
Loans
Loans	148,067	135,337	133,619
Less: Allowance for loan losses	1,025	1,072	1,598	1,873
Multifamily
Loans
Loans	82,981	76,396	49,718
Less: Allowance for loan losses	932	757	138	165
Commercial real estate
Loans
Loans	139,554	135,121	114,911
Less: Allowance for loan losses	1,388	1,412	1,493	1,501
Construction and land development
Loans
Loans	19,127	16,362	10,014
Less: Allowance for loan losses	367	301	171	374
Commercial business
Loans
Loans	32,477	37,675	24,040
Less: Allowance for loan losses	412	454	220	211
Consumer
Loans
Loans	20,514	20,290	18,051
Less: Allowance for loan losses	100	76	123	142
Home equity lines of credit
Loans
Loans	14,126	14,275
Education
Loans
Loans	4,560	4,694
Other
Loans
Loans	$1,828	$1,321

Loans_Details_2

Loans (Details 2) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Contractual aging of the recorded investment in past due loans
Current	$440,753,000	$417,836,000
30-59 Days Past Due	874,000	2,057,000
60-89 Days Past Due	196,000	369,000
Loans Past Due 90 Days or More	897,000	919,000
Total Loans	442,720,000	421,181,000	350,353,000
Troubled debt restructurings - accrual	0	0
Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	1,207,000	1,430,000
Single family
Contractual aging of the recorded investment in past due loans
Current	146,817,000	133,102,000
30-59 Days Past Due	746,000	1,623,000
60-89 Days Past Due	119,000	162,000
Loans Past Due 90 Days or More	385,000	450,000
Total Loans	148,067,000	135,337,000	133,619,000
Single family | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	530,000	791,000
Multifamily
Contractual aging of the recorded investment in past due loans
Current	82,981,000	76,396,000
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	0	0
Total Loans	82,981,000	76,396,000	49,718,000
Multifamily | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	0	0
Commercial real estate
Contractual aging of the recorded investment in past due loans
Current	139,428,000	134,584,000
30-59 Days Past Due	0	178,000
60-89 Days Past Due	0	163,000
Loans Past Due 90 Days or More	126,000	196,000
Total Loans	139,554,000	135,121,000	114,911,000
Commercial real estate | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	275,000	350,000
Construction and land development
Contractual aging of the recorded investment in past due loans
Current	19,096,000	16,362,000
30-59 Days Past Due	31,000	0
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	0	0
Total Loans	19,127,000	16,362,000	10,014,000
Construction and land development | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	0	0
Commercial business
Contractual aging of the recorded investment in past due loans
Current	32,477,000	37,653,000
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	0	22,000
Total Loans	32,477,000	37,675,000	24,040,000
Commercial business | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	0	22,000
Home equity lines of credit
Contractual aging of the recorded investment in past due loans
Current	13,816,000	13,918,000
30-59 Days Past Due	24,000	228,000
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	286,000	129,000
Total Loans	14,126,000	14,275,000
Home equity lines of credit | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	302,000	145,000
Education
Contractual aging of the recorded investment in past due loans
Current	4,310,000	4,502,000
30-59 Days Past Due	73,000	28,000
60-89 Days Past Due	77,000	44,000
Loans Past Due 90 Days or More	100,000	120,000
Total Loans	4,560,000	4,694,000
Education | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	100,000	120,000
Other
Contractual aging of the recorded investment in past due loans
Current	1,828,000	1,319,000
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
Loans Past Due 90 Days or More	0	2,000
Total Loans	1,828,000	1,321,000
Other | Past due loans
Contractual aging of the recorded investment in past due loans
Recorded investment in nonaccrual loans	$0	$2,000

Loans_Details_3

Loans (Details 3) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Risk category of loans evaluated by internal asset classification
Total	$442,720	$421,181	$350,353
Single family
Risk category of loans evaluated by internal asset classification
Total	148,067	135,337	133,619
Multifamily
Risk category of loans evaluated by internal asset classification
Total	82,981	76,396	49,718
Commercial real estate
Risk category of loans evaluated by internal asset classification
Total	139,554	135,121	114,911
Construction and land development
Risk category of loans evaluated by internal asset classification
Total	19,127	16,362	10,014
Commercial business
Risk category of loans evaluated by internal asset classification
Total	32,477	37,675	24,040
Home equity lines of credit
Risk category of loans evaluated by internal asset classification
Total	14,126	14,275
Education
Risk category of loans evaluated by internal asset classification
Total	4,560	4,694
Other
Risk category of loans evaluated by internal asset classification
Total	1,828	1,321
Pass
Risk category of loans evaluated by internal asset classification
Total	424,740	402,832
Pass | Single family
Risk category of loans evaluated by internal asset classification
Total	145,083	132,067
Pass | Multifamily
Risk category of loans evaluated by internal asset classification
Total	79,640	73,876
Pass | Commercial real estate
Risk category of loans evaluated by internal asset classification
Total	131,737	126,319
Pass | Construction and land development
Risk category of loans evaluated by internal asset classification
Total	19,122	16,357
Pass | Commercial business
Risk category of loans evaluated by internal asset classification
Total	28,988	34,112
Pass | Home equity lines of credit
Risk category of loans evaluated by internal asset classification
Total	13,782	14,088
Pass | Education
Risk category of loans evaluated by internal asset classification
Total	4,560	4,694
Pass | Other
Risk category of loans evaluated by internal asset classification
Total	1,828	1,319
Watch
Risk category of loans evaluated by internal asset classification
Total	12,855	12,808
Watch | Single family
Risk category of loans evaluated by internal asset classification
Total	1,309	1,317
Watch | Multifamily
Risk category of loans evaluated by internal asset classification
Total	2,742	1,915
Watch | Commercial real estate
Risk category of loans evaluated by internal asset classification
Total	5,385	6,117
Watch | Construction and land development
Risk category of loans evaluated by internal asset classification
Total	0	0
Watch | Commercial business
Risk category of loans evaluated by internal asset classification
Total	3,419	3,459
Watch | Home equity lines of credit
Risk category of loans evaluated by internal asset classification
Total	0	0
Watch | Education
Risk category of loans evaluated by internal asset classification
Total	0	0
Watch | Other
Risk category of loans evaluated by internal asset classification
Total	0	0
Special Mention
Risk category of loans evaluated by internal asset classification
Total	1,412	1,421
Special Mention | Single family
Risk category of loans evaluated by internal asset classification
Total	117	118
Special Mention | Multifamily
Risk category of loans evaluated by internal asset classification
Total	442	445
Special Mention | Commercial real estate
Risk category of loans evaluated by internal asset classification
Total	853	858
Special Mention | Construction and land development
Risk category of loans evaluated by internal asset classification
Total	0	0
Special Mention | Commercial business
Risk category of loans evaluated by internal asset classification
Total	0	0
Special Mention | Home equity lines of credit
Risk category of loans evaluated by internal asset classification
Total	0	0
Special Mention | Education
Risk category of loans evaluated by internal asset classification
Total	0	0
Special Mention | Other
Risk category of loans evaluated by internal asset classification
Total	0	0
Substandard
Risk category of loans evaluated by internal asset classification
Total	3,713	4,120
Substandard | Single family
Risk category of loans evaluated by internal asset classification
Total	1,558	1,835
Substandard | Multifamily
Risk category of loans evaluated by internal asset classification
Total	157	160
Substandard | Commercial real estate
Risk category of loans evaluated by internal asset classification
Total	1,579	1,827
Substandard | Construction and land development
Risk category of loans evaluated by internal asset classification
Total	5	5
Substandard | Commercial business
Risk category of loans evaluated by internal asset classification
Total	70	104
Substandard | Home equity lines of credit
Risk category of loans evaluated by internal asset classification
Total	344	187
Substandard | Education
Risk category of loans evaluated by internal asset classification
Total	0	0
Substandard | Other
Risk category of loans evaluated by internal asset classification
Total	0	2
Doubtful
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Single family
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Multifamily
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Commercial real estate
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Construction and land development
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Commercial business
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Home equity lines of credit
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Education
Risk category of loans evaluated by internal asset classification
Total	0	0
Doubtful | Other
Risk category of loans evaluated by internal asset classification
Total	$0	$0

Loans_Details_4

Loans (Details 4) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Allowance for loan losses
Balance, beginning	$4,072	$4,266
Provision for loan losses	350	150
Loans charge-off	-225	-714
Recoveries	27	41
Balance, ending	4,224	3,743
Period-ended amount allocated for:
Individually evaluated for impairment	103	324
Collectively evaluated for impairment	4,121	3,419
Ending Balance	4,224	3,743
Loans:
Individually evaluated for impairment	4,354	8,047
Collectively evaluated for impairment	438,366	342,306
Total Loans	442,720	350,353	421,181
Real Estate
Loans:
Total Loans	389,729		363,216
Single family
Allowance for loan losses
Balance, beginning	1,072	1,873
Provision for loan losses	103	6
Loans charge-off	-161	-296
Recoveries	11	15
Balance, ending	1,025	1,598
Period-ended amount allocated for:
Individually evaluated for impairment	45	0
Collectively evaluated for impairment	980	1,598
Ending Balance	1,025	1,598
Loans:
Individually evaluated for impairment	1,542	2,598
Collectively evaluated for impairment	146,525	131,021
Total Loans	148,067	133,619	135,337
Multifamily
Allowance for loan losses
Balance, beginning	757	165
Provision for loan losses	175	-27
Loans charge-off	0	0
Recoveries	0	0
Balance, ending	932	138
Period-ended amount allocated for:
Individually evaluated for impairment	0	66
Collectively evaluated for impairment	932	72
Ending Balance	932	138
Loans:
Individually evaluated for impairment	1,894	3,202
Collectively evaluated for impairment	81,087	46,516
Total Loans	82,981	49,718	76,396
Commercial real estate
Allowance for loan losses
Balance, beginning	1,412	1,501
Provision for loan losses	15	213
Loans charge-off	-48	-232
Recoveries	9	11
Balance, ending	1,388	1,493
Period-ended amount allocated for:
Individually evaluated for impairment	0	198
Collectively evaluated for impairment	1,388	1,295
Ending Balance	1,388	1,493
Loans:
Individually evaluated for impairment	558	2,068
Collectively evaluated for impairment	138,996	112,843
Total Loans	139,554	114,911	135,121
Construction and land development
Allowance for loan losses
Balance, beginning	301	374
Provision for loan losses	66	-203
Loans charge-off	0	0
Recoveries	0	0
Balance, ending	367	171
Period-ended amount allocated for:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	367	171
Ending Balance	367	171
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	19,127	10,014
Total Loans	19,127	10,014	16,362
Commercial business
Allowance for loan losses
Balance, beginning	454	211
Provision for loan losses	-34	154
Loans charge-off	-14	-159
Recoveries	6	14
Balance, ending	412	220
Period-ended amount allocated for:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	412	220
Ending Balance	412	220
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	32,477	24,040
Total Loans	32,477	24,040	37,675
Consumer and other
Allowance for loan losses
Balance, beginning	76	142
Provision for loan losses	25	7
Loans charge-off	-2	-27
Recoveries	1	1
Balance, ending	100	123
Period-ended amount allocated for:
Individually evaluated for impairment	58	60
Collectively evaluated for impairment	42	63
Ending Balance	100	123
Loans:
Individually evaluated for impairment	360	179
Collectively evaluated for impairment	20,154	17,872
Total Loans	$20,514	$18,051	$20,290

Loans_Details_5

Loans (Details 5) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Unpaid Principal Balance
Total	$4,866	$9,819
Recorded Investment
Total	4,354	8,047
Allowance for Loan Losses Allocated
With an allowance recorded	103	324
Average Recorded Investment
Total	7,189	9,034
Interest Income Recognized
Total	43	128
Single family
Unpaid Principal Balance
With no related allowance recorded	1,363	3,718
With an allowance recorded	417	0
Recorded Investment
With no related allowance recorded	1,148	2,598
With an allowance recorded	394	0
Allowance for Loan Losses Allocated
With an allowance recorded	45	0
Average Recorded Investment
With no related allowance recorded	1,274	1,999
With an allowance recorded	758	561
Interest Income Recognized
With no related allowance	11	32
With related allowance	3	0
Multifamily
Unpaid Principal Balance
With no related allowance recorded	1,998	3,399
With an allowance recorded	0	169
Recorded Investment
With no related allowance recorded	1,894	3,033
With an allowance recorded	0	169
Allowance for Loan Losses Allocated
With an allowance recorded	0	66
Average Recorded Investment
With no related allowance recorded	3,484	4,053
With an allowance recorded	86	171
Interest Income Recognized
With no related allowance	20	28
With related allowance	0	7
Commercial real estate
Unpaid Principal Balance
With no related allowance recorded	629	1,939
With an allowance recorded	0	198
Recorded Investment
With no related allowance recorded	558	1,870
With an allowance recorded	0	198
Allowance for Loan Losses Allocated
With an allowance recorded	0	198
Average Recorded Investment
With no related allowance recorded	1,118	1,773
With an allowance recorded	90	189
Interest Income Recognized
With no related allowance	8	54
With related allowance	0	4
Construction and land development
Unpaid Principal Balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	0	0
Allowance for Loan Losses Allocated
With an allowance recorded	0	0
Average Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	96	96
Interest Income Recognized
With no related allowance	0	0
With related allowance	0	0
Commercial business
Unpaid Principal Balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	0	0
Allowance for Loan Losses Allocated
With an allowance recorded	0	0
Average Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	0	0
Interest Income Recognized
With no related allowance	0	0
With related allowance	0	0
Consumer and other
Unpaid Principal Balance
With no related allowance recorded	401	336
With an allowance recorded	58	60
Recorded Investment
With no related allowance recorded	302	119
With an allowance recorded	58	60
Allowance for Loan Losses Allocated
With an allowance recorded	58	60
Average Recorded Investment
With no related allowance recorded	223	131
With an allowance recorded	60	61
Interest Income Recognized
With no related allowance	0	0
With related allowance	$1	$3

Loans_Details_6

Loans (Details 6) (USD $)	3 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Sep. 30, 2014
	contract		contract
Troubled debt restructured loans
Troubled debt restructurings - accrual	$0				$0
Number of Modifications	0		1
Unpaid Principal Balance (at end of period)	0		88,000
Balance in the ALLL, At Period End	0		0
Principal and Interest to Interest Only	0		0
Interest Rate Reduction
To Below Market Rate	0		0
To Interest Only	0		0
Adjusted Amortization Period	0		0
Reduced Principal Balance	0		0
Other	0	[1]	88,000	[1]
Total	0		88,000
Number of re-defaults of TDR	0		0
Loans outstanding to officers, employees, directors, and their associates	5,120,000				4,653,000
Troubled debt restructurings
Troubled debt restructured loans
Troubled debt restructurings - accrual	3,480,000				3,507,000
Troubled debt restructurings - nonaccrual	0				195,000
Troubled debt restructurings	3,480,000				3,702,000
Single family
Troubled debt restructured loans
Number of Modifications	0		1
Unpaid Principal Balance (at end of period)	0		88,000
Balance in the ALLL, At Period End	0		0
Principal and Interest to Interest Only	0		0
Interest Rate Reduction
To Below Market Rate	0		0
To Interest Only	0		0
Adjusted Amortization Period	0		0
Reduced Principal Balance	0		0
Other	0	[1]	88,000	[1]
Total	$0		$88,000
[1]	Other modifications primarily include capitalization of property taxes.

Loans_Loans_Details_7

Loans Loans (Details 7) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Loans [Abstract]
Loans outstanding to officers, employees, directors, and their associates	$5,120	$4,653
Loans and Leases Receivable, Related Parties, Additions	511
Loans and Leases Receivable, Related Parties, Amount Drawn Upon During Period	99
Loans and Leases Receivable, Related Parties, Collections	($143)

Real_Estate_Held_for_Sale_and_1

Real Estate Held for Sale and Branch Closings (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014
	property
Real Estate [Abstract]
Number of office properties designated as available for sale	2
Transfer to real estate held-for-sale from held-for-investment, fair value			$810
Transfer to real estate held-for-sale from office properties and equipment, fair value			1,932
Valuation loss on real estate held for sale	2,216	0	1,964
Branch realignment	$619	$0

Deposits_Details

Deposits (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
Negotiable order for withdrawal accounts:
Noninterest bearing	$88,628	$77,790
Interest bearing	134,486	132,925
Gross total	223,114	210,715
Passbook and Statement Savings	120,422	122,227
Variable Rate Money Market Accounts	31,901	25,615
Certificates of Deposit	97,251	96,371
Deposits	472,688	454,928
Negotiable order for withdrawal accounts:
Noninterest bearing (as a percent)	18.75%	17.10%
Interest bearing (as a percent)	28.45%	29.22%
Gross total (as a percent)	47.20%	46.32%
Passbook and Statement Savings (as a percent)	25.48%	26.87%
Variable Rate Money Market Accounts (as a percent)	6.75%	5.63%
Certificates of Deposit (as a percent)	20.57%	21.18%
Deposits (as a percent)	100.00%	100.00%
Certificates of Deposit over one hundred thousand dollars	$38,460	$34,853

Regulatory_Capital_Details

Regulatory Capital (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Reconciliation of stockholders' equity to regulatory capital
Stockholders' equity of the Bank	$86,526	$86,487	$90,702	$90,602
Less: Disallowed servicing assets	-1,528	-1,624
Westbury Bank
Total capital (to risk-weighted assets), Amount
Actual	66,312	65,181
For Capital Adequacy Purposes	33,554	32,228
To be Well Capitalized Under Prompt Corrective Action Provisions	41,943	40,285
Total capital (to risk-weighted assets), Ratio
Actual (as a percent)	15.81%	16.18%
For Capital Adequacy Purposes (as a percent)	8.00%	8.00%
To be Well Capitalized Under Prompt Corrective Action Provisions (as a percent)	10.00%	10.00%
Tier 1 capital (to risk-weighted assets), Amount
Actual	62,088	61,109
For Capital Adequacy Purposes	16,769	16,113
To be Well Capitalized Under Prompt Corrective Action Provisions	25,154	24,170
Tier 1 capital (to risk-weighted assets), Ratio
Actual (as a percent)	14.81%	15.17%
For Capital Adequacy Purposes (as a percent)	4.00%	4.00%
To be Well Capitalized Under Prompt Corrective Action Provisions (as a percent)	6.00%	6.00%
Tier 1 capital (to adjusted total assets), Amount
Actual	62,088	61,109
For Capital Adequacy Purposes	23,017	21,962
To be Well Capitalized Under Prompt Corrective Action Provisions	28,771	27,452
Tier 1 capital (to adjusted total assets), Ratio
Actual (as a percent)	10.79%	11.13%
For Capital Adequacy Purposes (as a percent)	4.00%	4.00%
To be Well Capitalized Under Prompt Corrective Action Provisions (as a percent)	5.00%	5.00%
Reconciliation of stockholders' equity to regulatory capital
Stockholders' equity of the Bank	68,282	67,529
Less: Disallowed servicing assets	-153	-162
Unrealized (gain) loss on securities	-69	33
Disallowed investment in subsidiary	-3,296	-3,296
Disallowed deferred tax assets	-2,676	-2,995
Tier 1 and tangible capital	62,088	61,109
Plus: Allowable general valuation allowances	4,224	4,072
Risk-based capital	$66,312	$65,181

Commitments_Details

Commitments (Details) (USD $)	3 Months Ended
	Dec. 31, 2014	Sep. 30, 2014
Financial Instruments with Off-Balance Sheet Risk
Liabilities recorded for company's potential obligations	$0	$0
Fixed rate commitments to extend mortgage credit
Financial Instruments with Off-Balance Sheet Risk
Financial instruments whose contract amounts represent credit risk	938,000	960,000
Adjustable rate commitments to extend mortgage credit
Financial Instruments with Off-Balance Sheet Risk
Financial instruments whose contract amounts represent credit risk	1,437,000	3,339,000
Unused commercial loan and home equity lines of credit
Financial Instruments with Off-Balance Sheet Risk
Financial instruments whose contract amounts represent credit risk	90,444,000	61,325,000
Standby letters of credit and financial guarantees written
Financial Instruments with Off-Balance Sheet Risk
Financial instruments whose contract amounts represent credit risk	967,000	422,000
Maximum period of letters of credit primarily issued to support public and private borrowing arrangements	1 year
Commitment to sell loans
Financial Instruments with Off-Balance Sheet Risk
Financial instruments whose contract amounts represent credit risk	$2,082,000	$326,000

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Assets
Securities available-for-sale	$83,180	$90,346
U.S. Government and agency securities
Assets
Securities available-for-sale	0	5,179
U.S. Government agency residential mortgage-backed securities
Assets
Securities available-for-sale	38,593	37,196
U.S. Government agency collateralized mortgage obligations
Assets
Securities available-for-sale	5,203	3,432
Commercial Mortgage Backed Securities [Member]
Assets
Securities available-for-sale	12,557	10,752
Municipal securities
Assets
Securities available-for-sale	26,827	33,787
Quoted Prices in Active Markets for Identical Assets (Level 1)
Liabilities
Derivatives	0	0
Significant Other Observable Inputs (Level 2)
Assets and liabilities measured at fair value
Period of U.S. Treasury rate	10 years
Assets
Securities available-for-sale	83,180	90,346
Derivatives	146	87
Liabilities
Derivatives	146	87
Significant Other Unobservable Inputs (Level 3)
Liabilities
Derivatives	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Securities available-for-sale	0	0
Derivatives	0	0
Liabilities
Derivatives	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Government and agency securities
Assets
Securities available-for-sale	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Government agency residential mortgage-backed securities
Assets
Securities available-for-sale	0	0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Government agency collateralized mortgage obligations
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets
Securities available-for-sale	83,180	90,346
Derivatives	146	87
Liabilities
Derivatives	146	87
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Government and agency securities
Assets
Securities available-for-sale	0	5,179
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Government agency residential mortgage-backed securities
Assets
Securities available-for-sale	38,593	37,196
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Government agency collateralized mortgage obligations
Assets
Securities available-for-sale	5,203	3,432
Recurring basis | Significant Other Observable Inputs (Level 2) | Commercial Mortgage Backed Securities [Member]
Assets
Securities available-for-sale	12,557	10,752
Recurring basis | Significant Other Observable Inputs (Level 2) | Municipal securities
Assets
Securities available-for-sale	26,827	33,787
Recurring basis | Significant Other Unobservable Inputs (Level 3)
Assets
Securities available-for-sale	0	0
Derivatives	0	0
Liabilities
Derivatives	0	0
Recurring basis | Significant Other Unobservable Inputs (Level 3) | U.S. Government and agency securities
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Other Unobservable Inputs (Level 3) | U.S. Government agency residential mortgage-backed securities
Assets
Securities available-for-sale	0	0
Recurring basis | Significant Other Unobservable Inputs (Level 3) | U.S. Government agency collateralized mortgage obligations
Assets
Securities available-for-sale	0	0
Total
Assets
Securities available-for-sale	83,180	90,346
Derivatives	146	87
Liabilities
Derivatives	146	87
Total | U.S. Government and agency securities
Assets
Securities available-for-sale		5,179
Total | U.S. Government agency residential mortgage-backed securities
Assets
Securities available-for-sale		37,196
Total | U.S. Government agency collateralized mortgage obligations
Assets
Securities available-for-sale		3,432
Total | Commercial Mortgage Backed Securities [Member]
Assets
Securities available-for-sale		10,752
Total | Municipal securities
Assets
Securities available-for-sale		33,787
Total | Recurring basis
Assets
Securities available-for-sale	83,180
Derivatives	146
Liabilities
Derivatives	146
Total | Recurring basis | U.S. Government and agency securities
Assets
Securities available-for-sale	0
Total | Recurring basis | U.S. Government agency residential mortgage-backed securities
Assets
Securities available-for-sale	38,593
Total | Recurring basis | U.S. Government agency collateralized mortgage obligations
Assets
Securities available-for-sale	5,203
Total | Recurring basis | Commercial Mortgage Backed Securities [Member]
Assets
Securities available-for-sale	12,557
Total | Recurring basis | Municipal securities
Assets
Securities available-for-sale	$26,827

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 2) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets measured at fair value on a nonrecurring basis
Foreclosed real estate	$2,333	$2,355
Impaired loans, valuation allowance	103		324
Significant Other Unobservable Inputs (Level 3)
Assets measured at fair value on a nonrecurring basis
Mortgage servicing rights	1,528	1,624
Carrying Amount
Assets measured at fair value on a nonrecurring basis
Mortgage servicing rights	1,528	1,624
Total
Assets measured at fair value on a nonrecurring basis
Mortgage servicing rights	1,528	1,624
Nonrecurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets measured at fair value on a nonrecurring basis
Impaired loans	0	0
Foreclosed real estate	0	0
Mortgage servicing rights	0	0
Nonrecurring Basis | Significant Other Observable Inputs (Level 2)
Assets measured at fair value on a nonrecurring basis
Impaired loans	0	0
Foreclosed real estate	0	0
Mortgage servicing rights	0	0
Nonrecurring Basis | Significant Other Unobservable Inputs (Level 3)
Assets measured at fair value on a nonrecurring basis
Impaired loans	349	405
Foreclosed real estate	2,333	2,355
Mortgage servicing rights	1,528	1,624
Impaired loans, valuation allowance	103	136
Mortgage servicing rights, valuation allowance	160	160
Nonrecurring Basis | Carrying Amount | Significant Other Unobservable Inputs (Level 3)
Assets measured at fair value on a nonrecurring basis
Impaired loans	452	541
Mortgage servicing rights	1,688	1,784
Nonrecurring Basis | Total
Assets measured at fair value on a nonrecurring basis
Impaired loans	349	405
Foreclosed real estate	2,333	2,355
Mortgage servicing rights	$1,528	$1,624

Fair_Value_Measurements_Detail2

Fair Value Measurements (Details 3) (USD $)	Dec. 31, 2014	Sep. 30, 2014
In Thousands, unless otherwise specified
Financial assets
Securities available-for-sale	$83,180	$90,346
Held-to-maturity Securities	3,025	0
Federal Home Loan Bank stock	2,670	2,670
Financial liabilities
Advance payments by borrowers for property taxes and insurance	255	5,869
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
Cash and cash equivalents	24,475	17,608
Held-to-maturity Securities	0
Accrued interest receivable	1,748	1,784
Financial liabilities
Deposits	88,628	77,790
Advances from Federal Home Loan Bank	0	0
Advance payments by borrowers for property taxes and insurance	255	5,869
Accrued interest payable	4	3
Derivative liability	0	0
Significant Other Observable Inputs (Level 2)
Financial assets
Securities available-for-sale	83,180	90,346
Held-to-maturity Securities	3,025
Loans held for sale, net	2,082	326
Derivative asset	146	87
Financial liabilities
Deposits	0	0
Advances from Federal Home Loan Bank	31,000	17,000
Advance payments by borrowers for property taxes and insurance	0	0
Accrued interest payable	0	0
Derivative liability	146	87
Significant Other Unobservable Inputs (Level 3)
Financial assets
Held-to-maturity Securities	0
Loans, net	440,204	415,857
Federal Home Loan Bank stock	2,670	2,670
Mortgage servicing rights	1,528	1,624
Financial liabilities
Deposits	371,676	364,552
Advances from Federal Home Loan Bank	0	0
Advance payments by borrowers for property taxes and insurance	0	0
Accrued interest payable	0	0
Derivative liability	0	0
Carrying Amount
Financial assets
Cash and cash equivalents	24,475	17,608
Securities available-for-sale	83,180	90,346
Held-to-maturity Securities	3,025
Loans, net	438,172	416,874
Loans held for sale, net	2,082	326
Federal Home Loan Bank stock	2,670	2,670
Mortgage servicing rights	1,528	1,624
Accrued interest receivable	1,748	1,784
Derivative asset	146	87
Financial liabilities
Deposits	472,688	454,928
Advances from Federal Home Loan Bank	31,000	17,000
Advance payments by borrowers for property taxes and insurance	255	5,869
Accrued interest payable	4	3
Derivative liability	146	87
Estimated Fair Value
Financial assets
Cash and cash equivalents	24,475	17,608
Securities available-for-sale	83,180	90,346
Held-to-maturity Securities	3,025
Loans, net	440,204	415,857
Loans held for sale, net	2,082	326
Federal Home Loan Bank stock	2,670	2,670
Mortgage servicing rights	1,528	1,624
Accrued interest receivable	1,748	1,784
Derivative asset	146	87
Financial liabilities
Deposits	460,304	442,342
Advances from Federal Home Loan Bank	31,000	17,000
Advance payments by borrowers for property taxes and insurance	255	5,869
Accrued interest payable	4	3
Derivative liability	$146	$87

Condensed_Parent_Company_Finan2

Condensed Parent Company Financial Information Balance Sheet (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
In Thousands, unless otherwise specified
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and interest bearing deposits	$24,475	$17,608	$33,664	$47,665
Other assets	3,765	3,504
Total assets	594,614	568,695
Other liabilities	4,145	4,411
Stockholders' equity	86,526	86,487	90,702	90,602
Total liabilities and stockholders' equity	594,614	568,695
Parent Company [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and interest bearing deposits	6,082	6,878
Investments	6,754	6,590
Loan to ESOP	3,778	3,931
Investment in subsidiary	71,771	71,131
Other assets	1,761	1,674
Total assets	90,146	90,204
Other liabilities	130	115
Stockholders' equity	90,016	90,089
Total liabilities and stockholders' equity	$90,146	$90,204

Condensed_Parent_Company_Finan3

Condensed Parent Company Financial Information Statements of Operations (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Condensed Income Statements, Captions [Line Items]
Net income	$447	$68
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Interest and other income	63	70
Interest and other expense	184	187
Loss before income tax benefit and equity in undistributed net income of subsidiary	-121	-117
Income tax benefit	-30	-32
Loss before equity in undistributed net income of subsidiary	-91	-85
Equity in undistributed net income of subsidiary	538	153
Net income	$447	$68

Condensed_Parent_Company_Finan4

Condensed Parent Company Financial Information Statement of Cash Flows (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	$447	$68
Deferred income taxes	224	22
Stock based compensation expense	201	0
Net change in other assets	-243	-579
Net cash provided by operating activities	-6,176	-4,099
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchase of securities	-8,189	-6,394
Net cash provided by (used in) investing activities	-17,884	-7,549
Net Cash Provided by (Used in) Financing Activities [Abstract]
Purchase of Company treasury stock	-833	0
Net cash used in financing activities	30,927	-2,353
Parent Company [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income	447	68
Equity in undistributed net income of subsidiary	-538	-153
Net change in other liabilities	15	-19
Net change in other assets	124	130
Net cash provided by operating activities	48	26
Net Cash Provided by (Used in) Investing Activities [Abstract]
Purchase of securities	-376	-100
Sales and maturities of securities	212	405
Payments received on ESOP loan	153	183
Net cash provided by (used in) investing activities	-11	488
Net Cash Provided by (Used in) Financing Activities [Abstract]
Purchase of Company treasury stock	-833	0
Net cash used in financing activities	-833	0
Net increase (decrease) in cash	-796	514
Beginning of year	6,878	9,271
End of year	$6,082	$9,785