Ben Franklin Financial 10-Q 14 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	13-May-15
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	BFFI
Entity Registrant Name	BEN FRANKLIN FINANCIAL, INC.
Entity Central Index Key	1618798
Current Fiscal Year End Date	-19
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		696,339

Consolidated_Statements_of_Fin

Consolidated Statements of Financial Condition (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
ASSETS
Cash and due from banks	$787	$969
Interest-earning deposit accounts and federal funds sold	17,136	18,045
Cash and cash equivalents	17,923	19,014
Securities available-for-sale	8,641	6,636
Loans receivable, net of allowance for loan losses of $1,179 at March 31, 2015 and $1,206 at December 31, 2014	57,951	60,405
Federal Home Loan Bank stock	921	921
Premises and equipment, net	533	557
Repossessed assets, net	493	504
Accrued interest receivable	197	188
Other assets	146	1,259
Total assets	86,805	89,484
Liabilities
Demand deposits - noninterest-bearing	3,511	5,983
Demand deposits - interest-bearing	9,456	9,530
Savings deposits	9,937	10,199
Money market deposits	13,032	13,680
Certificates of deposit	39,635	40,593
Total deposits	75,571	79,985
Advances from borrowers for taxes and insurance	464	682
Other liabilities	492	524
Common stock in ESOP subject to contingent purchase obligation	117	114
Total liabilities	76,644	81,305
Stockholders' equity
Preferred stock, no par value; authorized 1,000,000 shares no shares issued and outstanding:	0
Common stock, par value $0.01 per share; authorized 20,000,000 shares issued and outstanding, net of treasury shares, at: March 31, 2015 - 696,339 shares December 31, 2014 - 694,574 shares	7	20	[1]
Additional paid-in-capital	10,330	8,233
Treasury stock, at cost - 0 shares at March 31, 2015 and 24,318 at December 31, 2014		-462	[1]
Retained earnings, substantially restricted	529	855
Unearned Employee Stock Ownership Plan (ESOP) shares	-613	-355
Accumulated other comprehensive income	25	2
Reclassification of ESOP shares	-117	-114
Total stockholders' equity	10,161	8,179
Total liabilities and stockholders' equity	$86,805	$89,484
[1]	Share amounts for 2014 have been adjusted to reflect the completion of the Company's conversion offering on January 22, 2015 and the exchange of the existing shares of Ben Franklin Financial, Inc. (a Federal corporation) at an exchange ratio of .3562 for each existing share.

Consolidated_Statements_of_Fin1

Consolidated Statements of Financial Condition (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Loans receivable, net of allowance for loan losses	$1,179	$1,206
Preferred stock, par value	$0	$0
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	696,339	694,574
Common stock, shares outstanding	696,339	694,574
Treasury stock, shares	0	24,318
Share conversion ratio		0.3562
Common Stock [Member]
Share conversion ratio	0.3562	0.3562
Treasury Stock [Member]
Share conversion ratio		0.3562

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest income
Loans	$714	$835
Securities	26	14
Federal funds sold and interest earning deposit accounts	8	8
Total interest income	748	857
Interest expense
Deposits	94	118
Total interest expense	94	118
Net interest income	654	739
Provision for loan losses	0	0
Net interest income after provision for loan losses	654	739
Non-interest income
Service fee income	18	24
Gain on sale of other assets, net	34	2
Other	12	19
Total non-interest income	64	45
Non-interest expense
Compensation and employee benefits	494	441
Occupancy and equipment	163	150
Data processing services	90	89
Professional fees	126	83
FDIC insurance premiums	47	51
Repossessed asset expenses, net	40	22
Other	99	127
Total operating expenses	1,059	963
Loss before income taxes	-341	-179
Income tax	-15	-3
Net loss	($326)	($176)
Loss per common share basic and diluted	($0.49)	($0.26)	[1]
[1]	Per share amounts for 2014 have been adjusted to reflect the completion of the Company's conversion offering on January 22, 2015 and the exchange of the existing shares of Ben Franklin Financial, Inc. (a Federal corporation) at an exchange ratio of .3562 for each existing share.

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations (Parenthetical)	12 Months Ended
	Dec. 31, 2014
Income Statement [Abstract]
Share conversion ratio	0.3562

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	($326)	($176)
Other comprehensive loss
Unrealized holding gains arising during the period	38	8
Tax effect	-15	-3
Net of tax	23	5
Comprehensive loss	($303)	($171)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Shareholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive Income [Member]	Amount Reclassified on ESOP Shares [Member]
In Thousands
Balance at Dec. 31, 2013	$9,617	$20	$8,269	($462)	$2,271	($406)	$4	($79)
Net loss	-176				-176
Other comprehensive income	5						5
Earned ESOP shares and other stock based compensation	4		-9			13
Reclassification due to change in fair value of common stock in ESOP subject to contingent repurchase obligation	2							2
Balance at Mar. 31, 2014	9,452	20	8,260	-462	2,095	-393	9	-77
Balance at Dec. 31, 2014	8,179	20	8,233	-462	855	-355	2	-114
Net loss	-326				-326
Other comprehensive income	23						23
Earned ESOP shares and other stock based compensation	7		-8			15
Reclassification due to conversion		-13	13
Net proceeds from common stock offering	2,504		2,504
Funds from termination of MHC	50		50
Addition to ESOP due to conversion	-273					-273
Retirement of treasury stock due to conversion			-462	462
Reclassification due to change in fair value of common stock in ESOP subject to contingent repurchase obligation	-3							-3
Balance at Mar. 31, 2015	$10,161	$7	$10,330		$529	($613)	$25	($117)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net loss	($326)	($176)
Adjustments to reconcile net income (loss) to net cash from operating activities
Depreciation	28	29
ESOP and other stock based compensation, net	7	3
Gain on sale of repossessed assets	-34	-2
Changes in:
Deferred loan costs	1	1
Accrued interest receivable	-9	12
Other assets	825	-83
Other liabilities	-32	41
Net cash from operating activities	460	-175
Cash flows from investing activities
Principal repayments on mortgage-backed securities	33	44
Calls and maturities of securities available for sale	1,000
Purchase of securities available for sale	-3,000
Net decrease in loans	2,408	4,040
Sales of repossessed assets	90	3
Expenditures for premises and equipment	-4	-15
Net cash from investing activities	527	4,072
Cash flows from financing activities
Net decrease in deposits	-4,414	-1,698
Net proceeds from common stock offering	2,504
Funds from termination of MHC	50
Net change in advances from borrowers for taxes and insurance	-218	-163
Net cash from financing activities	-2,078	-1,861
Net change in cash and cash equivalents	-1,091	2,036
Cash and cash equivalents at beginning of year	19,014	19,960
Cash and cash equivalents at end of period	17,923	21,966
Supplemental disclosures
Interest paid	93	117
Transfers from loans to repossessed assets	$45	$67

Basis_of_Financial_Statement_P

Basis of Financial Statement Presentation	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Financial Statement Presentation	Note 1 – Basis of Financial Statement Presentation
	The accompanying consolidated financial statements of Ben Franklin Financial, Inc. (the “Company”) and its wholly owned subsidiary Ben Franklin Bank of Illinois (the “Bank”) have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and in accordance with SEC rules and regulations. Accordingly, the statements do not include all the information and footnotes required by GAAP for complete financial statements. These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto that were included in the Company’s Annual Report for the year ended December 31, 2014. All significant intercompany transactions are eliminated in consolidation. In the opinion of the Company’s management, all adjustments necessary (i) for a fair presentation of the financial statements for the interim periods included herein and (ii) to make such financial statements not misleading have been made and are of a normal and recurring nature. Interim results are not necessarily indicative of results for a full year.
	In preparing the financial statements, management is required to make estimates and assumptions that affect the recorded amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the period. Actual results could differ from those estimates. For further information with respect to significant accounting policies followed by the Company in preparation of the financial statements, refer to the Company’s 2014 Annual Report.
	The Bank is a federally chartered stock savings bank and a member of the Federal Home Loan Bank (“FHLB”) system. The Bank maintains insurance on deposit accounts with the Deposit Insurance Fund (“DIF”) of the Federal Deposit Insurance Corporation (“FDIC”).
	On September 12, 2014, Ben Franklin Financial filed a Registration Statement on Form S-1 with the Securities and Exchange Commission in connection with the mutual to stock conversion of Ben Franklin Financial, MHC and the related offering of common stock by Ben Franklin Financial, Inc. The Registration Statement (File No. 333-198702) was declared effective by the Securities and Exchange Commission on November 12, 2014. Ben Franklin Financial, Inc. registered 998,488 shares of common stock, par value $0.01 per share, pursuant to the Registration Statement. The stock offering commenced on November 21, 2014, and ended on January 8, 2015.
	The stock offering closed January 22, 2015 and resulted in gross proceeds of $3.9 million, through the sale of 390,474 shares of common stock at a price of $10.00 per share. Expenses related to the offering were approximately $1.4 million. Net proceeds of the offering were approximately $2.5 million.
	As part of the conversion, the MHC’s ownership interest of the Company was offered for sale in a public offering. The existing publicly held shares of the Company, were exchanged for 0.3562 new shares of common stock of Ben Franklin Financial. The exchange ratio ensured that immediately after the conversion and public offering, the public shareholders of Company owned the same aggregate percentage of Ben Franklin Financial common stock that they owned immediately prior to that time (excluding shares purchased in the stock offering and cash received in lieu of fractional shares). When the conversion and public offering was completed, Ben Franklin Financial became the holding company of Ben Franklin Bank of Illinois and succeeded to all of the business and operations of the Company and each of the Company and the MHC ceased to exist. The financial statements do not include the transactions and balances of the MHC.
	Ben Franklin Financial, Inc. contributed $2.0 million of the net proceeds of the offering to the Bank. In addition, $273,330 of the net proceeds were used to fund the loan to the employee stock ownership plan and approximately $314,000 of the net proceeds were retained by Ben Franklin Financial, Inc. The net proceeds contributed to the Bank have been invested in interest earning deposits and investment securities, and are expected to be used for funding future loan growth. The net proceeds retained by Ben Franklin Financial, Inc. were deposited with the Bank.

Recent_Losses_and_Management_P

Recent Losses and Management Plans	3 Months Ended
	Mar. 31, 2015
Banking and Thrift [Abstract]
Recent Losses and Management Plans	Note 2 – Recent Losses and Management Plans
	The Company incurred net losses of $326 during the three months ended March 31, 2015 and $1,416 during the year ended December 31, 2014. The losses are largely a result of our declining net interest income and increasing non-interest expense related to professional fees and repossessed asset holding costs and write-downs. Despite these losses, the Bank’s total capital to risk-based capital ratio and Tier 1 leverage capital to average assets ratio was 19.2% and 10.5% at March 31, 2015 and 15.5% and 8.7% at December 31, 2014. Due to our financial condition over the past several years, the Bank entered into a Consent Order (“Order”) with the Office of the Comptroller of the Currency (“OCC”) on December 19, 2012. The Order outlines areas of weakness that the Bank must improve related to asset quality including valuations, classifications, monitoring, concentrations, and allowance for loan losses; capital and strategic planning; liquidity management; consumer compliance; and management and board structure along with time frames for completion. The Order mandated that the Bank maintain a total risk-based capital ratio of at least 13% and a Tier 1 leverage ratio of at least 9% beginning on March 31, 2014. At March 31, 2015, the Bank was in compliance with the required minimum ratios. At December 31, 2014, prior to the completion of the Company’s stock offering, the Bank was not in compliance with the Tier 1 leverage ratio but was in compliance with the total risk based capital ratio.
	Management has initiated specific plans to reduce credit risk and improve the Bank’s regulatory capital ratios including the completion of the public offering in 2015. The Company has $326 and $43 of cash at March 31, 2015 and December 31, 2014. If the Bank is unable to meet the capital requirements and other requirements of the Order, the OCC may institute other corrective measures and has enforcement powers to impose additional restrictions on the Bank’s operations, including seizure. Although management believes that it will successfully maintain the required capital ratios, there can be no assurance that they will be able to do so, nor that they will be able to comply fully with the provisions of the Order. Only the OCC has the ability to determine whether or not the provisions of the Order have been met.

New_Accounting_Standards

New Accounting Standards	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
New Accounting Standards	Note 3 – New Accounting Standards
	In January 2014 the FASB issued Accounting Standards Update 2014-04 Receivables -Troubled Debt Restructurings by Creditors (Subtopic 310-40) Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. The amendments in this Update clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. For public entities, the amendments of the update are effective for interim and annual reporting periods beginning after December 31, 2014. Adoption this pronouncement did not have a material impact on the results of operations, financial condition, or financial statement disclosures of the Company.
	In May 2014 in an effort to foster additional consistency in recognizing revenue the FASB issued accounting standards update 2014-09 Revenue from Contracts with Customers. The main provisions of the update require the identification of performance obligations within a contract and require the recognition of revenue based on a stand-alone allocation of contract revenue to each performance obligation. Performance obligations may be satisfied and revenue recognized over a period of time if: (i) the customer simultaneously receives and consumes the benefits provided by the entity’s performance as the entity performs, or (ii) the entity’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced, or (iii) the entity’s performance does not create an asset with an alternative use to the entity, and the entity has an enforceable right to payment for performance completed to date. Initially the amendments of the update were to be effective for public entities beginning with interim and annual reporting periods beginning after December 15, 2016, however the FASB recently voted to defer the implementation for one year, although that change has not yet been finalized. Management does not expect the impacts of this update to have a material impact on the Company’s financial position, results of operations or cash flows.

Securities_Availablefor_Sale

Securities Available-for Sale	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Securities Available-for Sale	Note 4 – Securities Available-for Sale
	The amortized cost and fair value of securities available-for-sale and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	March 31, 2015
	U.S. government-sponsored entities	$	8,000	$	15		$	(9	)	$	8,006
	Residential mortgage-backed		599		36			—			635
	Total	$	8,599	$	51		$	(9	)	$	8,641
	December 31, 2014
	U.S. government-sponsored entities	$	6,000	$	—		$	(34	)	$	5,966
	Residential mortgage-backed		632		38			—			670
	Total	$	6,632	$	38		$	(34	)	$	6,636
	There were no sales of securities available-for-sale during the three months ended March 31, 2015 or the three months ended March 31, 2014. There were no securities pledged to secure any of the borrowings of the Company as of March 31, 2015 and December 31, 2014.
	The amortized cost and fair value of available-for-sale securities are shown by contractual maturity as of March 31, 2015. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.
		March 31, 2015
		Amortized		Fair
		Cost		Value
	U.S. government-sponsored entities
	Within one year	$	—	$	—
	One to five years		7,000		7,007
	Five to ten years		1,000		999
	Residential mortgage-backed		599		635
	Total	$	8,599	$	8,641
	Anticipated maturities on mortgage-backed securities are not readily determinable as borrowers have the right to prepay their obligation with or without penalties.
	The following table summarizes securities with unrealized losses at March 31, 2015 and December 31, 2014, aggregated by major security type and length of time in a continuous unrealized loss position.
		Less Than 12 Months					12 Months or More						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Loss			Value			Loss			Value		Loss
	2015
	U.S. government sponsored entities	$	999	$	(1	)	$	992		$	(8	)	$	1,991	$	(9	)
	2014
	U.S. government sponsored entities	$	3,985	$	(15	)	$	981		$	(19	)	$	4,966	$	(34	)
	As of March 31, 2015 and December 31, 2014, all of the Company’s securities available for sale were issued by U.S. government-sponsored entities and agencies which the government has affirmed its commitment to support.
	Unrealized losses on securities have not been recognized into income because the issuer’s securities are of high credit quality (rated AA or higher at the time of purchase), management does not intend to sell and it is not more likely than not that management would be required to sell the securities prior to their anticipated recovery, and the decline in fair value is largely due to changes in interest rates. The fair value is expected to recover as the securities approach maturity.

Loans

Loans	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Loans	Note 5 – Loans
	The following table sets forth the composition of our loan portfolio by segment and class, at the dates indicated.
		March 31, 2015						December 31, 2014
		Amount			Percent			Amount			Percent
		(Dollars in thousands)
	First mortgage loans:
	Secured by one- to four- family	$	30,799			52.06	%	$	31,430			50.98	%
	Secured by multi-family		9,717			16.42			9,834			15.95
	Secured by commercial real estate		9,580			16.19			10,324			16.75
	Secured by construction		416			0.7			260			0.42
	Secured by land		208			0.35			213			0.35
	Total first mortgage loans		50,720			85.72			52,061			84.45
	Commercial, consumer and other loans:
	Home equity lines-of-credit		6,511			11			7,360			11.94
	Commercial business loans		696			1.18			826			1.34
	Automobile loans		1,241			2.1			1,401			2.27
	Other consumer loans		1			0			2			0
	Total commercial, consumer and other loans		8,449			14.28			9,589			15.55
	Gross loans		59,169			100			61,650			100
	Premiums and net deferred loan costs		(39	)					(39	)
	Allowance for loan losses		(1,179	)					(1,206	)
	Total loans, net	$	57,951					$	60,405
	The following table presents the activity in the allowance for loan losses by portfolio segment and class for the three months ended March 31, 2015 and 2014.
		First Mortgages															Commercial, Consumer and Other
		(Dollars in thousands)
		One-to-four			Multi-			Commercial			Land			Construction			Home equity			Commercial			Automobile			Other			Total
		family			family			real estate									lines-of-									Consumer
																	credit
	For the three months ended March 31, 2015
	Allowance for loan losses
	Beginning balance	$	392		$	354		$	277		$	6		$	7		$	96		$	8		$	66		$	—		$	1,206
	Provision for loan losses		(22	)		14			11			—			6			(4	)		(1	)		(3	)		(1	)		—
	Loans charged-off		—			(28	)		—			—			—			—			—			(1	)		—			(29	)
	Recoveries		—			—			—			—			1			—			—			—			1			2
	Total ending allowance balance March 31, 2015	$	370		$	340		$	288		$	6		$	14		$	92		$	7		$	62		$	—		$	1,179
	For the three months ended March 31, 2014
	Allowance for loan losses
	Beginning balance	$	589		$	252		$	300		$	7		$	—		$	78		$	20		$	56		$	—		$	1,302
	Provision for loan losses		82			(6	)		(229	)		6			(2	)		77			1			71			—			—
	Loans charged-off		—			—			—			(6	)		—			(18	)		—			(16	)		—			(40	)
	Recoveries		—			—			186			—			2			—			—			—			—			188
	Total ending allowance balance March 31, 2014	$	671		$	246		$	257		$	7		$	—		$	137		$	21		$	111		$	—		$	1,450
	The following table represents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and class based on the impaired method at the dates indicated. The recorded investment in loans excludes accrued interest and loan origination fees due to immateriality.
		Loan Balance									Allowance
		(Dollars in thousands)
		Individually			Collectively			Total			Individually			Collectively			Total
		Evaluated for			Evaluated for			Recorded			Evaluated for			Evaluated for			Recorded
		Impairment			Impairment			Investment			Impairment			Impairment			Investment
	March 31, 2015
	One-to-four-family	$	1,363		$	29,436		$	30,799		$	45		$	325		$	370
	Multi-family		2,937			6,780			9,717			208			132			340
	Commercial real estate		—			9,580			9,580			—			288			288
	Land		—			208			208			—			6			6
	Construction		—			416			416			—			14			14
	Home equity lines of credit		—			6,511			6,511			—			92			92
	Commercial		77			619			696			—			7			7
	Automobile		—			1,241			1,241			—			62			62
	Other consumer		—			1			1			—			—			—
	Total	$	4,377		$	54,792		$	59,169		$	253		$	926		$	1,179
	December 31, 2014
	One-to-four-family	$	1,403		$	30,027		$	31,430		$	78		$	314		$	392
	Multi-family		2,985			6,849			9,834			247			107			354
	Commercial real estate		—			10,324			10,324			—			277			277
	Land		—			213			213			—			6			6
Construction		—			260			260			—			7			7
Home equity lines of credit		—			7,360			7,360			—			96			96
Commercial		95			731			826			—			8			8
Automobile		—			1,401			1,401			—			66			66
Other consumer		—			2			2			—			—			—
Total	$	4,483		$	57,167		$	61,650		$	325		$	881		$	1,206
The following tables present information related to loans individually evaluated for impairment by class of loans as of and for the three months ended March 31, 2015 and 2014 and as of and for the year ended December 31, 2014
	Unpaid						Allowance for			Average			Interest			Cash Basis
	Principal			Recorded			Loan Losses			Recorded			Income			Interest
	Balance			Investment			Allocated			Investment			Recorded			Recorded
March 31, 2015
With no related allowance recorded
One-to-four-family	$	1,186		$	811		$	—		$	854		$	—		$	—
Multi-family		802			627			—			630			6			6
Commercial real estate		—			—			—			—			—			—
Land		—			—			—			—			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		280			77			—			83			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—			—			—
Total with no related allowance recorded		2,268			1,515			—			1,567			6			6
With an allowance recorded
One-to-four-family		552			552			45			554			7			7
Multi-family		2,338			2,310			208			2,342			26			26
Commercial real estate		—			—			—			—			—			—
Land		—			—			—			—			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		—			—			—			—			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—			—			—
Total with a related allowance recorded		2,890			2,862			253			2,896			33			33
Total	$	5,158		$	4,377		$	253		$	4,463		$	39		$	39
	Unpaid						Allowance for			Average			Interest			Cash Basis
	Principal			Recorded			Loan Losses			Recorded			Income			Interest
	Balance			Investment			Allocated			Investment			Recorded			Recorded
March 31, 2014
With no related allowance recorded
One-to-four-family	$	889		$	514		$	—		$	514		$	—		$	—
Multi-family		2,870			2,518			—			918			6			6
Commercial real estate		236			198			—			200			—			—
Land		131			102			—			102			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		417			214			—			231			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—			—			—
Total with no related allowance recorded		4,543			3,546			—			1,965			6			6
With an allowance recorded
One-to-four-family		566			566			147			568			7			7
Multi-family		772			772			73			2,386			26			26
Commercial real estate		—			—			—			284			—			—
Land		—			—			—			—			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		—			—			—			—			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—			—			—
Total with a related allowance recorded		1,338			1,338			220			3,238			33			33
Total	$	5,881		$	4,884		$	220		$	5,203		$	39		$	39
	Unpaid						Allowance for			Average			Interest			Cash Basis
	Principal			Recorded			Loan Losses			Recorded			Income			Interest
	Balance			Investment			Allocated			Investment			Recorded			Recorded
December 31, 2014
With no related allowance recorded
One-to-four-family	$	1,011		$	543		$	—		$	541		$	—		$	—
Multi-family		811			636			—			889			14			14
Commercial real estate		—			—			—			99			—			—
Land		—			—			—			68			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		339			95			—			178			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—						—
Total with no related allowance recorded		2,161			1,274			—			1,775			14			14
With an allowance recorded
One-to-four-family		860			860			78			588			27			27
Multi-family		2,349			2,349			247			2,369			103			103
Commercial real estate		—			—			—			71			—			—
Land		—			—			—			—			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		—			—			—			—			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—			—			—
Total with a related allowance recorded		3,209			3,209			325			3,028			130			130
Total	$	5,370		$	4,483		$	325		$	4,803		$	144		$	144
The following table presents the aging of the recorded investment in past due loans at the dates indicated by class of loans.
	30-59			60-89			Greater than
	Days			Days			90 Days Past Due						Loans Not
	Past due			Past due			Still on Accrual			Nonaccrual			Past Due			Total
	(Dollars in thousands)
March 31, 2015
One-to-four-family	$	—		$	178		$	—		$	811		$	29,810		$	30,799
Multi-family		—			—			—			344			9,373			9,717
Commercial real estate		—			—			—			—			9,580			9,580
Land		—			—			—			—			208			208
Construction		—			—			—			—			416			416
Home equity line of credit		—			61			—			—			6,450			6,511
Commercial		—			—			—			77			619			696
Automobile		—			—			—			—			1,241			1,241
Other consumer		—			—			—			—			1			1
Total	$	—		$	239		$	—		$	1,232		$	57,698		$	59,169
December 31, 2014
One-to-four-family	$	—		$	—		$	—		$	847		$	30,583		$	31,430
Multi-family		—			—			—			353			9,481			9,834
Commercial real estate		—			—			—			—			10,324			10,324
Land		—			—			—			—			213			213
Construction		—			—			—			—			260			260
Home equity line of credit		—			—			—			—			7,360			7,360
Commercial		—			—			—			95			731			826
Automobile		—			—			—			—			1,401			1,401
Other consumer		—			—			—			—			2			2
Total	$	—		$	—		$	—		$	1,295		$	60,355		$	61,650
Nonperforming loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans.
Credit Quality Indicators
The Bank categorizes loans into risk categories based on relevant information about the ability of a borrower to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Bank analyzes loans individually by classifying the loans as to credit risk. The analysis includes the non-homogeneous loans, such as multi- family, commercial real estate, construction, and commercial loans. The analysis is performed on a quarterly basis. Homogeneous loans are monitored based on past due status of the loan. The risk category of these loans is evaluated at origination, when a loan becomes delinquent or when a borrower requests a concession.
Substandard
Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.
Doubtful
Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.
Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans. The following table reflects the risk category by loans at the dates indicated based on the most recent analysis performed.
	Pass			Substandard			Doubtful			Total
	(Dollars in thousands)
March 31, 2015
One-to-four-family	$	29,988		$	811		$	—		$	30,799
Multi-family		9,373			344			—			9,717
Commercial real estate		9,580			—			—			9,580
Land		208			—			—			208
Construction		416			—			—			416
Home equity lines of credit		6,511			—			—			6,511
Commercial		619			77			—			696
Automobile		1,241			—			—			1,241
Other consumer		1			—			—			1
Total	$	57,937		$	1,232		$	—		$	59,169
December 31, 2014
One-to-four-family	$	30,583		$	847		$	—		$	31,430
Multi-family		9,481			353			—			9,834
Commercial real estate		10,324			—			—			10,324
Land		213			—			—			213
Construction		260			—			—			260
Home equity lines of credit		7,360			—			—			7,360
Commercial		731			95			—			826
Automobile		1,401			—			—			1,401
Other consumer		2			—			—			2
Total	$	60,355		$	1,295		$	—		$	61,650
Troubled Debt Restructurings
Our troubled debt restructurings totaled $3,667 at March 31, 2015 and $3,736 at December 31, 2014. There were no loans modified as troubled debt restructurings during the three months ended March 31, 2015 or the year ended December 31, 2014.
There were three loans modified as troubled debt restructurings but paying as agreed under the terms of the modification with a balance of $521 as of March 31, 2015, which are being reported as nonaccrual. There were three loans modified as troubled debt restructurings with a balance of $548 which are being reported as nonaccrual as of December 31, 2014, two of which totaling $448 are paying as agreed under the terms of the modification.
A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. There were no loans with payments in default during the three months ended March 31, 2015. During the year ended December 31, 2014 one loan totaling $231, secured by a multi-family building, had payments in default and subsequently paid off resulting in a $60 recovery.
The Company has allocated $253 to specific reserves on $2,863 of loans to customers whose loan terms have been modified in troubled debt restructurings as of March 31, 2015. At December 31, 2014, the Company has allocated $293 to specific reserves on $2,904 of loans to customers whose loan terms have been modified in troubled debt restructurings. The Company has not committed to lend additional amounts as of March 31, 2015 and December 31, 2014 to customers with outstanding loans that are classified as troubled debt restructurings.

Loss_Per_Share

Loss Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Loss Per Share	Note 6 – Loss Per Share
	The following table presents a reconciliation of the components used to compute basic and diluted earnings (loss) per share:
			For the Three Months Ended
			March 31,			March 31,
			2015			2014
	Net income (loss) (Dollars in thousands)		$	(326	)	$	(176	)
	Weighted average common shares outstanding (1)			663,369			680,353
	Basic and diluted income (loss) per share (1)		$	(0.49	)	$	(0.26	)
	1	Share and per share amounts for 2014 have been adjusted to reflect the completion of the Company’s conversion offering on January 22, 2015 and the exchange of the existing shares of Ben Franklin Financial, Inc. (a Federal corporation) at an exchange ratio of .3562 for each existing share.
	The outstanding options and restricted shares are considered antidilutive because of the net loss.

Fair_Value_Measures

Fair Value Measures	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measures	Note 7 – Fair Value Measures
	Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:
	Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.
	Level 2 – Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.
	Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.
	The Company used the following methods and significant assumptions to estimate the fair value of each type of financial instrument:
	Securities Available-for-Sale: The fair values of securities available-for-sale are determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs).
	Impaired Loans: The fair value of impaired loans with specific allocations of the allowance for loan losses is generally based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted accordingly.
	Repossessed Assets: Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals which are updated no less frequently than annually. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are usually significant and typically result in a Level 3 classification of the inputs for determining fair value. Other real estate owned properties are evaluated on a quarterly basis for additional impairment and adjusted accordingly.
	Appraisals for both collateral-dependent impaired loans and other real estate owned are performed by certified appraisers whose qualifications and licenses have been reviewed and verified by the Company. Once received, management reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. Upon sale of collateral, the Company compares the actual selling price of collateral that has been sold to the most recent appraised value to determine what additional adjustment should be made to the appraisal value to arrive at fair value for the remaining assets carried at fair value.
	Assets Measured on a Recurring Basis
	Assets measured at fair value on a recurring basis are summarized below:
				Fair Value Measurements Using
		Balance		Quoted Prices in			Significant		Significant
				Active Markets for			Other		Unobservable
				Identical Assets			Observable		Inputs
				(Level 1)			Inputs		(Level 3)
							(Level 2)
	March 31, 2015
	Assets
	Securities available for sale
	U.S. government-sponsored entities	$	8,006	$	—		$	8,006	$	—
	Residential mortgaged-backed		635		—			635		—
		$	8,641	$	—		$	8,641	$	—
	December 31, 2014
	Assets
	Securities available for sale
	U.S. government-sponsored entities	$	5,966	$	—		$	5,966	$	—
	Residential mortgaged-backed		670		—			670		—
		$	6,636	$	—		$	6,636	$	—
	There were no transfers between Level 1, Level 2, and Level 3 during the three-months ended March 31, 2015 or the year ended December 31, 2014.
	Assets Measured on a Non-Recurring Basis
	Assets measured at fair value on a non-recurring basis are summarized below:
				Fair Value Measurements Using
		Balance		Quoted Prices in			Significant		Significant
				Active Markets for			Other		Unobservable
				Identical Assets			Observable		Inputs
				(Level 1)			Inputs		(Level 3)
							(Level 2)
	March 31, 2015
	Assets
	Impaired loans
	Multi-family	$	2,102	$	—		$	—	$	2,102
	Total impaired loans	$	2,102	$	—		$	—	$	2,102
	Repossessed assets
	Commercial real estate	$	389	$	—		$	—		389
	Land		102		—			—		102
	Automobile		2		—			—		2
	Total repossessed assets	$	493	$	—		$	—	$	493
	December 31, 2014
	Assets
	Impaired loans
	One-to-four-family	$	272	$	—		$	—	$	272
	Multi-family		2,102		—			—		2,102
	Total impaired loans	$	2,374	$	—		$	—	$	2,374
	Repossessed assets
	Commercial real estate		389		—			—		389
	Land		102		—			—		102
	Automobile		13		—			—		13
	Total repossessed assets	$	504	$	—		$	—	$	504
	Impaired loans, which are measured for impairment using the fair value of the collateral (less cost to sell) for collateral dependent loans, had an aggregate balance of $2,310 with a $208 valuation allowance at March 31, 2015. The impaired loans resulted in no provision for loan loss for the three months ended March 31, 2015. At December 31, 2014, impaired loans had an aggregate balance of $2,653 with a $279 valuation allowance. The impaired loans resulted in no provision for loan loss for the three months ended March 31, 2014.
	Repossessed assets, consisting of other real estate owned, repossessed automobiles, and other repossessed assets are measured at the lower of cost or fair value less costs to sell. Repossessed assets were carried at $493 at March 31, 2015 consisting of the cost basis of $646 and a valuation allowance of $153. Repossessed assets were carried at $504 at December 31, 2014, consisting of the cost basis of $657 and a valuation allowance of $153. There were no write-downs on repossessed assets for the three months ended March 31, 2015 and 2014.
	The following table presents quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at March 31, 2015 and December 31, 2014:
	March 31, 2015
	Fair		Valuation Technique			Range
	Value				Unobservable Inputs
Impaired loans
Multi-family	$	2,102	Sales comparison approach		Adjustment for differences between the comparable sales	(11.6%) –
						20.70%
Other real estate owned
Commercial real estate	$	389	Sales comparison approach		Adjustment for differences between the comparable sales	(1.2%) –
						-21.70%
Land	$	102	Sales comparison approach		Adjustment for differences between the comparable sales	(48.2%) –
						4.50%
December 31, 2014
	Fair		Valuation Technique			Range
	Value				Unobservable Inputs
Impaired loans
One-to-four-family	$	272	Sales comparison approach		Adjustment for differences between the comparable sales	(18.9%) -
						15.00%
Multi-family	$	2,102	Sales comparison approach		Adjustment for differences between the comparable sales	(11.6%) –
						20.70%
Other real estate owned
Commercial real estate	$	389	Sales comparison approach		Adjustment for differences between the comparable sales	(1.2%) –
						-21.70%
Land	$	102	Sales comparison approach		Adjustment for differences between the comparable sales	(48.2%) –
						4.50%
The carrying amounts and estimated fair values of the Company’s financial instruments are as follows:
			Fair Value Measurements at
			March 31, 2015 (Unaudited) Using:
	Carrying Amount		Level 1			Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	17,923	$	17,923		$	—	$	—	$	17,923
Securities available-for-sale		8,641		—			8,641		—		8,641
Loans receivable, net		57,951		—			—		58,445		58,445
FHLB stock		921		N/A			N/A		N/A		N/A
Accrued interest receivable		197		—			19		178		197
Financial liabilities
Demand, money market, and savings	$	35,936	$	35,936		$	—	$	—	$	35,936
Certificates of deposits		39,635		—			39,734		—		39,734
Advances by borrowers for taxes and insurance		464		464			—		—		464
Accrued interest payable		1		—			1		—		1
			Fair Value Measurements at
			December 31, 2014 Using:
	Carrying Amount		Level 1			Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	19,014	$	19,014		$	—	$	—	$	19,014
Securities available-for-sale		6,636		—			6,636		—		6,636
Loans receivable, net		60,405		—			—		61,858		61,858
FHLB stock		921		N/A			N/A		N/A		N/A
Accrued interest receivable		188		—			15		173		188
Financial liabilities
Demand, money market, and savings	$	39,392	$	39,392		$	—	$	—	$	39,392
Certificates of deposits		40,593		—			40,566		—		40,566
Advances by borrowers for taxes and insurance		682		682			—		—		682
Accrued interest payable		—		—			—		—		—
The methods and assumptions, not previously presented, used to estimate fair values are described as follows:
(a) Cash and Cash Equivalents
The carrying amounts of cash and short-term instruments approximate fair values and are classified as Level 1
(b) Loans receivable, net
Fair values of loans receivable, net are estimated as follows: For variable rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values resulting in a Level 3 classification. Fair values for other loans are estimated using discounted cash flow analyses, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality resulting in a Level 3 classification. Impaired loans are valued at the lower of cost or fair value as described previously. The methods utilized to estimate the fair value of loans do not necessarily represent an exit price.
(c) FHLB Stock
It is not practical to determine the fair value of FHLB stock due to restrictions placed on its transferability.
(d) Accrued Interest Receivable
The carrying amount of accrued interest receivable approximates its fair value and is classified as Level 2 for securities and Level 3 for loans.
(e) Deposits
The fair values disclosed for demand deposits (e.g., interest and non-interest demand, savings, and certain types of money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amount) and are classified as Level 1. The carrying amounts of variable rate certificates of deposit approximate their fair values at the reporting date are classified as a Level 2. Fair values for fixed rate certificates of deposit are estimated using a discounted cash flows calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits resulting in a Level 2 classification.
(f) Accrued Interest Payable
The carrying amount of accrued interest payable approximates its fair value and is classified as Level 2.

Regulatory_Capital_Matters

Regulatory Capital Matters	3 Months Ended
	Mar. 31, 2015
Banking and Thrift [Abstract]
Regulatory Capital Matters	Note 8 – Regulatory Capital Matters
	The Bank is subject to various regulatory capital requirements administered by the 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 operations and 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.
	Quantitative measures established by regulation to help ensure capital adequacy require the Bank to maintain minimum amounts and ratios of common equity, Tier I, and total capital as defined in the regulations to risk-weighted assets as defined and of Tier I capital to average total assets as defined. To be categorized as well capitalized, the Bank must maintain minimum common equity, Tier I risk-based, total risk-based, and Tier I leverage ratios. In March 2015, the Bank implemented the Basel III capital rules that reformed the regulatory capital framework. As a result, the Bank is subject to a minimum Common equity Tier 1 ratio of 4.5% to be considered “adequately” capitalized or 6.0% to be considered “well capitalized”.
	On December 19, 2012, the Bank entered into the Order with the OCC, which, among other things, included a requirement to maintain a total risk-based capital ratio of at least 13% and a minimum Tier 1 leverage capital ratio of at least 9% beginning on March 31, 2014. As a result of entering into the Order to achieve and maintain specific capital levels, the Bank’s capital classification under the Prompt Corrective Action rules was “adequately capitalized” at March 31, 2015 and December 31, 2014. Although the Bank’s capital levels at March 31, 2015 were above the levels required to be considered “well capitalized” under federal bank regulatory agency definitions, the Bank cannot be consider “well capitalized” as long as it remains under the Order. During 2014, the Bank met the risk-based capital requirement but did not meet the Tier 1 capital requirement. With the completion of the conversion and stock offering on January 22, 2015, the Company did meet the capital requirement of the Order at March 31, 2015. The minimum capital ratios set forth in the Order may be increased and other minimum capital requirements may be established to comply with the Basel III requirements now applicable to the Bank.
	The prompt corrective action regulations provide five classifications, including well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If undercapitalized, asset growth and expansion are limited and plans for capital restoration are required.
	Actual capital levels and minimum required levels for the Bank were:
		Actual					Minimum Required					Minimum Required
							for Capital					By the Current
							Adequacy Purposes					Order
												(effective
												March 31, 2013)
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	March 31, 2015
	Total capital (to risk-weighted assets)	$	9,883		19.2	%	$	4,112		8	%	$	6,766		13	%
	Common equity Tier 1 capital (to risk-weighted assets)		9,234		18			2,313		4.5			N/A		N/A
	Tier 1 capital (to risk-weighted assets)		9,234		18			3,084		6			N/A		N/A
	Tier 1 capital (to average total assets)		9,234		10.5			2,531		4			7,809		9
	December 31, 2014
	Total capital (to risk-weighted assets)	$	8,510		15.5	%	$	4,387		8	%	$	7,129		13	%
	Tier 1 (core) capital (to risk-weighted assets)		7,818		14.3			2,193		4			N/A		N/A
	Tier 1 (core) capital (to adjusted total assets)		7,818		8.7			3,580		4			8,054		9
	Under Basel III a capital conservation buffer of 2.5%, comprised of Common Equity Tier 1, is established above the regulatory minimum capital requirement. The capital conservation buffer will be phased in between January 1, 2016 and year end 2018 becoming fully effective on January 1, 2019.
	The Bank made the one-time AOCI opt-out election on the first Call Report filed after January 1, 2015, which allows community banks under $250 billion with a one-time opt-out election to remove the impact of certain unrealized capital gains and losses from the calculation of capital. There is no opportunity to change methodology in future periods.

Basis_of_Financial_Statement_P1

Basis of Financial Statement Presentation (Policies)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Financial Statement Presentation	The accompanying consolidated financial statements of Ben Franklin Financial, Inc. (the “Company”) and its wholly owned subsidiary Ben Franklin Bank of Illinois (the “Bank”) have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and in accordance with SEC rules and regulations. Accordingly, the statements do not include all the information and footnotes required by GAAP for complete financial statements. These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto that were included in the Company’s Annual Report for the year ended December 31, 2014. All significant intercompany transactions are eliminated in consolidation. In the opinion of the Company’s management, all adjustments necessary (i) for a fair presentation of the financial statements for the interim periods included herein and (ii) to make such financial statements not misleading have been made and are of a normal and recurring nature. Interim results are not necessarily indicative of results for a full year.
	In preparing the financial statements, management is required to make estimates and assumptions that affect the recorded amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses for the period. Actual results could differ from those estimates. For further information with respect to significant accounting policies followed by the Company in preparation of the financial statements, refer to the Company’s 2014 Annual Report.
	The Bank is a federally chartered stock savings bank and a member of the Federal Home Loan Bank (“FHLB”) system. The Bank maintains insurance on deposit accounts with the Deposit Insurance Fund (“DIF”) of the Federal Deposit Insurance Corporation (“FDIC”).
	On September 12, 2014, Ben Franklin Financial filed a Registration Statement on Form S-1 with the Securities and Exchange Commission in connection with the mutual to stock conversion of Ben Franklin Financial, MHC and the related offering of common stock by Ben Franklin Financial, Inc. The Registration Statement (File No. 333-198702) was declared effective by the Securities and Exchange Commission on November 12, 2014. Ben Franklin Financial, Inc. registered 998,488 shares of common stock, par value $0.01 per share, pursuant to the Registration Statement. The stock offering commenced on November 21, 2014, and ended on January 8, 2015.
	The stock offering closed January 22, 2015 and resulted in gross proceeds of $3.9 million, through the sale of 390,474 shares of common stock at a price of $10.00 per share. Expenses related to the offering were approximately $1.4 million. Net proceeds of the offering were approximately $2.5 million.
	As part of the conversion, the MHC’s ownership interest of the Company was offered for sale in a public offering. The existing publicly held shares of the Company, were exchanged for 0.3562 new shares of common stock of Ben Franklin Financial. The exchange ratio ensured that immediately after the conversion and public offering, the public shareholders of Company owned the same aggregate percentage of Ben Franklin Financial common stock that they owned immediately prior to that time (excluding shares purchased in the stock offering and cash received in lieu of fractional shares). When the conversion and public offering was completed, Ben Franklin Financial became the holding company of Ben Franklin Bank of Illinois and succeeded to all of the business and operations of the Company and each of the Company and the MHC ceased to exist. The financial statements do not include the transactions and balances of the MHC.
	Ben Franklin Financial, Inc. contributed $2.0 million of the net proceeds of the offering to the Bank. In addition, $273,330 of the net proceeds were used to fund the loan to the employee stock ownership plan and approximately $314,000 of the net proceeds were retained by Ben Franklin Financial, Inc. The net proceeds contributed to the Bank have been invested in interest earning deposits and investment securities, and are expected to be used for funding future loan growth. The net proceeds retained by Ben Franklin Financial, Inc. were deposited with the Bank.
New Accounting Standards	In January 2014 the FASB issued Accounting Standards Update 2014-04 Receivables -Troubled Debt Restructurings by Creditors (Subtopic 310-40) Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. The amendments in this Update clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. For public entities, the amendments of the update are effective for interim and annual reporting periods beginning after December 31, 2014. Adoption this pronouncement did not have a material impact on the results of operations, financial condition, or financial statement disclosures of the Company.
	In May 2014 in an effort to foster additional consistency in recognizing revenue the FASB issued accounting standards update 2014-09 Revenue from Contracts with Customers. The main provisions of the update require the identification of performance obligations within a contract and require the recognition of revenue based on a stand-alone allocation of contract revenue to each performance obligation. Performance obligations may be satisfied and revenue recognized over a period of time if: (i) the customer simultaneously receives and consumes the benefits provided by the entity’s performance as the entity performs, or (ii) the entity’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced, or (iii) the entity’s performance does not create an asset with an alternative use to the entity, and the entity has an enforceable right to payment for performance completed to date. Initially the amendments of the update were to be effective for public entities beginning with interim and annual reporting periods beginning after December 15, 2016, however the FASB recently voted to defer the implementation for one year, although that change has not yet been finalized. Management does not expect the impacts of this update to have a material impact on the Company’s financial position, results of operations or cash flows.

Securities_Availablefor_Sale_T

Securities Available-for Sale (Tables)	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Summary Available-for-Sale Securities	The amortized cost and fair value of securities available-for-sale and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows:
		Amortized		Gross			Gross			Fair
		Cost		Unrealized			Unrealized			Value
				Gains			Losses
	March 31, 2015
	U.S. government-sponsored entities	$	8,000	$	15		$	(9	)	$	8,006
	Residential mortgage-backed		599		36			—			635
	Total	$	8,599	$	51		$	(9	)	$	8,641
	December 31, 2014
	U.S. government-sponsored entities	$	6,000	$	—		$	(34	)	$	5,966
	Residential mortgage-backed		632		38			—			670
	Total	$	6,632	$	38		$	(34	)	$	6,636
Schedule of Amortized Cost and Fair Value of Available-For-Sale Securities	Securities not due at a single maturity date are shown separately.
		March 31, 2015
		Amortized		Fair
		Cost		Value
	U.S. government-sponsored entities
	Within one year	$	—	$	—
	One to five years		7,000		7,007
	Five to ten years		1,000		999
	Residential mortgage-backed		599		635
	Total	$	8,599	$	8,641
Schedule Of Security with Unrealized Losses	The following table summarizes securities with unrealized losses at March 31, 2015 and December 31, 2014, aggregated by major security type and length of time in a continuous unrealized loss position.
		Less Than 12 Months					12 Months or More						Total
		Fair		Unrealized			Fair			Unrealized			Fair		Unrealized
		Value		Loss			Value			Loss			Value		Loss
	2015
	U.S. government sponsored entities	$	999	$	(1	)	$	992		$	(8	)	$	1,991	$	(9	)
	2014
	U.S. government sponsored entities	$	3,985	$	(15	)	$	981		$	(19	)	$	4,966	$	(34	)

Loans_Tables

Loans (Tables)	3 Months Ended
	Mar. 31, 2015
Receivables [Abstract]
Schedule of Composition of Loan Portfolio by Segment and Class	The following table sets forth the composition of our loan portfolio by segment and class, at the dates indicated.
		March 31, 2015						December 31, 2014
		Amount			Percent			Amount			Percent
		(Dollars in thousands)
	First mortgage loans:
	Secured by one- to four- family	$	30,799			52.06	%	$	31,430			50.98	%
	Secured by multi-family		9,717			16.42			9,834			15.95
	Secured by commercial real estate		9,580			16.19			10,324			16.75
	Secured by construction		416			0.7			260			0.42
	Secured by land		208			0.35			213			0.35
	Total first mortgage loans		50,720			85.72			52,061			84.45
	Commercial, consumer and other loans:
	Home equity lines-of-credit		6,511			11			7,360			11.94
	Commercial business loans		696			1.18			826			1.34
	Automobile loans		1,241			2.1			1,401			2.27
	Other consumer loans		1			0			2			0
	Total commercial, consumer and other loans		8,449			14.28			9,589			15.55
	Gross loans		59,169			100			61,650			100
	Premiums and net deferred loan costs		(39	)					(39	)
	Allowance for loan losses		(1,179	)					(1,206	)
	Total loans, net	$	57,951					$	60,405
Schedule of Allowance for Loan Losses by Portfolio Segment and Class	The following table presents the activity in the allowance for loan losses by portfolio segment and class for the three months ended March 31, 2015 and 2014.
		First Mortgages															Commercial, Consumer and Other
		(Dollars in thousands)
		One-to-four			Multi-			Commercial			Land			Construction			Home equity			Commercial			Automobile			Other			Total
		family			family			real estate									lines-of-									Consumer
																	credit
	For the three months ended March 31, 2015
	Allowance for loan losses
	Beginning balance	$	392		$	354		$	277		$	6		$	7		$	96		$	8		$	66		$	—		$	1,206
	Provision for loan losses		(22	)		14			11			—			6			(4	)		(1	)		(3	)		(1	)		—
	Loans charged-off		—			(28	)		—			—			—			—			—			(1	)		—			(29	)
	Recoveries		—			—			—			—			1			—			—			—			1			2
	Total ending allowance balance March 31, 2015	$	370		$	340		$	288		$	6		$	14		$	92		$	7		$	62		$	—		$	1,179
	For the three months ended March 31, 2014
	Allowance for loan losses
	Beginning balance	$	589		$	252		$	300		$	7		$	—		$	78		$	20		$	56		$	—		$	1,302
	Provision for loan losses		82			(6	)		(229	)		6			(2	)		77			1			71			—			—
	Loans charged-off		—			—			—			(6	)		—			(18	)		—			(16	)		—			(40	)
	Recoveries		—			—			186			—			2			—			—			—			—			188
	Total ending allowance balance March 31, 2014	$	671		$	246		$	257		$	7		$	—		$	137		$	21		$	111		$	—		$	1,450
Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment	The following table represents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and class based on the impaired method at the dates indicated. The recorded investment in loans excludes accrued interest and loan origination fees due to immateriality.
		Loan Balance									Allowance
		(Dollars in thousands)
		Individually			Collectively			Total			Individually			Collectively			Total
		Evaluated for			Evaluated for			Recorded			Evaluated for			Evaluated for			Recorded
		Impairment			Impairment			Investment			Impairment			Impairment			Investment
	March 31, 2015
	One-to-four-family	$	1,363		$	29,436		$	30,799		$	45		$	325		$	370
	Multi-family		2,937			6,780			9,717			208			132			340
	Commercial real estate		—			9,580			9,580			—			288			288
	Land		—			208			208			—			6			6
	Construction		—			416			416			—			14			14
	Home equity lines of credit		—			6,511			6,511			—			92			92
	Commercial		77			619			696			—			7			7
	Automobile		—			1,241			1,241			—			62			62
	Other consumer		—			1			1			—			—			—
	Total	$	4,377		$	54,792		$	59,169		$	253		$	926		$	1,179
	December 31, 2014
	One-to-four-family	$	1,403		$	30,027		$	31,430		$	78		$	314		$	392
	Multi-family		2,985			6,849			9,834			247			107			354
	Commercial real estate		—			10,324			10,324			—			277			277
	Land		—			213			213			—			6			6
	Construction		—			260			260			—			7			7
	Home equity lines of credit		—			7,360			7,360			—			96			96
	Commercial		95			731			826			—			8			8
	Automobile		—			1,401			1,401			—			66			66
	Other consumer		—			2			2			—			—			—
	Total	$	4,483		$	57,167		$	61,650		$	325		$	881		$	1,206
Summary of Loans Individually Evaluated for Impairment by Class	The following tables present information related to loans individually evaluated for impairment by class of loans as of and for the three months ended March 31, 2015 and 2014 and as of and for the year ended December 31, 2014
		Unpaid						Allowance for			Average			Interest			Cash Basis
		Principal			Recorded			Loan Losses			Recorded			Income			Interest
		Balance			Investment			Allocated			Investment			Recorded			Recorded
	March 31, 2015
	With no related allowance recorded
	One-to-four-family	$	1,186		$	811		$	—		$	854		$	—		$	—
	Multi-family		802			627			—			630			6			6
	Commercial real estate		—			—			—			—			—			—
	Land		—			—			—			—			—			—
	Construction		—			—			—			—			—			—
	Home equity line of credit		—			—			—			—			—			—
	Commercial		280			77			—			83			—			—
	Automobile		—			—			—			—			—			—
	Other consumer		—			—			—			—			—			—
	Total with no related allowance recorded		2,268			1,515			—			1,567			6			6
	With an allowance recorded
	One-to-four-family		552			552			45			554			7			7
	Multi-family		2,338			2,310			208			2,342			26			26
	Commercial real estate		—			—			—			—			—			—
	Land		—			—			—			—			—			—
	Construction		—			—			—			—			—			—
	Home equity line of credit		—			—			—			—			—			—
	Commercial		—			—			—			—			—			—
	Automobile		—			—			—			—			—			—
	Other consumer		—			—			—			—			—			—
	Total with a related allowance recorded		2,890			2,862			253			2,896			33			33
	Total	$	5,158		$	4,377		$	253		$	4,463		$	39		$	39
		Unpaid						Allowance for			Average			Interest			Cash Basis
		Principal			Recorded			Loan Losses			Recorded			Income			Interest
		Balance			Investment			Allocated			Investment			Recorded			Recorded
	March 31, 2014
	With no related allowance recorded
	One-to-four-family	$	889		$	514		$	—		$	514		$	—		$	—
	Multi-family		2,870			2,518			—			918			6			6
	Commercial real estate		236			198			—			200			—			—
	Land		131			102			—			102			—			—
	Construction		—			—			—			—			—			—
	Home equity line of credit		—			—			—			—			—			—
	Commercial		417			214			—			231			—			—
	Automobile		—			—			—			—			—			—
	Other consumer		—			—			—			—			—			—
	Total with no related allowance recorded		4,543			3,546			—			1,965			6			6
	With an allowance recorded
	One-to-four-family		566			566			147			568			7			7
	Multi-family		772			772			73			2,386			26			26
	Commercial real estate		—			—			—			284			—			—
	Land		—			—			—			—			—			—
	Construction		—			—			—			—			—			—
	Home equity line of credit		—			—			—			—			—			—
	Commercial		—			—			—			—			—			—
	Automobile		—			—			—			—			—			—
	Other consumer		—			—			—			—			—			—
	Total with a related allowance recorded		1,338			1,338			220			3,238			33			33
	Total	$	5,881		$	4,884		$	220		$	5,203		$	39		$	39
		Unpaid						Allowance for			Average			Interest			Cash Basis
		Principal			Recorded			Loan Losses			Recorded			Income			Interest
		Balance			Investment			Allocated			Investment			Recorded			Recorded
	December 31, 2014
	With no related allowance recorded
	One-to-four-family	$	1,011		$	543		$	—		$	541		$	—		$	—
	Multi-family		811			636			—			889			14			14
	Commercial real estate		—			—			—			99			—			—
	Land		—			—			—			68			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		339			95			—			178			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—						—
Total with no related allowance recorded		2,161			1,274			—			1,775			14			14
With an allowance recorded
One-to-four-family		860			860			78			588			27			27
Multi-family		2,349			2,349			247			2,369			103			103
Commercial real estate		—			—			—			71			—			—
Land		—			—			—			—			—			—
Construction		—			—			—			—			—			—
Home equity line of credit		—			—			—			—			—			—
Commercial		—			—			—			—			—			—
Automobile		—			—			—			—			—			—
Other consumer		—			—			—			—			—			—
Total with a related allowance recorded		3,209			3,209			325			3,028			130			130
Total	$	5,370		$	4,483		$	325		$	4,803		$	144		$	144
Summary of Aging of Recorded Investment in Past Due Loans	The following table presents the aging of the recorded investment in past due loans at the dates indicated by class of loans.
		30-59			60-89			Greater than
		Days			Days			90 Days Past Due						Loans Not
		Past due			Past due			Still on Accrual			Nonaccrual			Past Due			Total
		(Dollars in thousands)
	March 31, 2015
	One-to-four-family	$	—		$	178		$	—		$	811		$	29,810		$	30,799
	Multi-family		—			—			—			344			9,373			9,717
	Commercial real estate		—			—			—			—			9,580			9,580
	Land		—			—			—			—			208			208
	Construction		—			—			—			—			416			416
	Home equity line of credit		—			61			—			—			6,450			6,511
	Commercial		—			—			—			77			619			696
	Automobile		—			—			—			—			1,241			1,241
	Other consumer		—			—			—			—			1			1
	Total	$	—		$	239		$	—		$	1,232		$	57,698		$	59,169
	December 31, 2014
	One-to-four-family	$	—		$	—		$	—		$	847		$	30,583		$	31,430
	Multi-family		—			—			—			353			9,481			9,834
	Commercial real estate		—			—			—			—			10,324			10,324
	Land		—			—			—			—			213			213
	Construction		—			—			—			—			260			260
	Home equity line of credit		—			—			—			—			7,360			7,360
	Commercial		—			—			—			95			731			826
	Automobile		—			—			—			—			1,401			1,401
	Other consumer		—			—			—			—			2			2
	Total	$	—		$	—		$	—		$	1,295		$	60,355		$	61,650
Summary of Loans Classified by Risk Category	Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans. The following table reflects the risk category by loans at the dates indicated based on the most recent analysis performed.
		Pass			Substandard			Doubtful			Total
		(Dollars in thousands)
	March 31, 2015
	One-to-four-family	$	29,988		$	811		$	—		$	30,799
	Multi-family		9,373			344			—			9,717
	Commercial real estate		9,580			—			—			9,580
	Land		208			—			—			208
	Construction		416			—			—			416
	Home equity lines of credit		6,511			—			—			6,511
	Commercial		619			77			—			696
	Automobile		1,241			—			—			1,241
	Other consumer		1			—			—			1
	Total	$	57,937		$	1,232		$	—		$	59,169
	December 31, 2014
	One-to-four-family	$	30,583		$	847		$	—		$	31,430
	Multi-family		9,481			353			—			9,834
	Commercial real estate		10,324			—			—			10,324
	Land		213			—			—			213
	Construction		260			—			—			260
	Home equity lines of credit		7,360			—			—			7,360
	Commercial		731			95			—			826
	Automobile		1,401			—			—			1,401
	Other consumer		2			—			—			2
	Total	$	60,355		$	1,295		$	—		$	61,650

Loss_Per_Share_Tables

Loss Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Reconciliation of Components Used to Compute Basic and Diluted Earnings (Loss) Per Share	The following table presents a reconciliation of the components used to compute basic and diluted earnings (loss) per share:
			For the Three Months Ended
			March 31,			March 31,
			2015			2014
	Net income (loss) (Dollars in thousands)		$	(326	)	$	(176	)
	Weighted average common shares outstanding (1)			663,369			680,353
	Basic and diluted income (loss) per share (1)		$	(0.49	)	$	(0.26	)
	1	Share and per share amounts for 2014 have been adjusted to reflect the completion of the Company’s conversion offering on January 22, 2015 and the exchange of the existing shares of Ben Franklin Financial, Inc. (a Federal corporation) at an exchange ratio of .3562 for each existing share.

Fair_Value_Measures_Tables

Fair Value Measures (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Summary of Assets Measured at Fair Value on Recurring Basis	Assets measured at fair value on a recurring basis are summarized below:
				Fair Value Measurements Using
		Balance		Quoted Prices in			Significant		Significant
				Active Markets for			Other		Unobservable
				Identical Assets			Observable		Inputs
				(Level 1)			Inputs		(Level 3)
							(Level 2)
	March 31, 2015
	Assets
	Securities available for sale
	U.S. government-sponsored entities	$	8,006	$	—		$	8,006	$	—
	Residential mortgaged-backed		635		—			635		—
		$	8,641	$	—		$	8,641	$	—
	December 31, 2014
	Assets
	Securities available for sale
	U.S. government-sponsored entities	$	5,966	$	—		$	5,966	$	—
	Residential mortgaged-backed		670		—			670		—
		$	6,636	$	—		$	6,636	$	—
Summary of Assets Measured at Fair Value on Non-Recurring Basis	Assets measured at fair value on a non-recurring basis are summarized below:
				Fair Value Measurements Using
		Balance		Quoted Prices in			Significant		Significant
				Active Markets for			Other		Unobservable
				Identical Assets			Observable		Inputs
				(Level 1)			Inputs		(Level 3)
							(Level 2)
	March 31, 2015
	Assets
	Impaired loans
	Multi-family	$	2,102	$	—		$	—	$	2,102
	Total impaired loans	$	2,102	$	—		$	—	$	2,102
	Repossessed assets
	Commercial real estate	$	389	$	—		$	—		389
	Land		102		—			—		102
	Automobile		2		—			—		2
	Total repossessed assets	$	493	$	—		$	—	$	493
	December 31, 2014
	Assets
	Impaired loans
	One-to-four-family	$	272	$	—		$	—	$	272
	Multi-family		2,102		—			—		2,102
	Total impaired loans	$	2,374	$	—		$	—	$	2,374
	Repossessed assets
	Commercial real estate		389		—			—		389
	Land		102		—			—		102
	Automobile		13		—			—		13
	Total repossessed assets	$	504	$	—		$	—	$	504
Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on a Non-recurring Basis	The following table presents quantitative information about level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis at March 31, 2015 and December 31, 2014:
	March 31, 2015
		Fair		Valuation Technique			Range
		Value				Unobservable Inputs
	Impaired loans
	Multi-family	$	2,102	Sales comparison approach		Adjustment for differences between the comparable sales	(11.6%) –
							20.70%
	Other real estate owned
	Commercial real estate	$	389	Sales comparison approach		Adjustment for differences between the comparable sales	(1.2%) –
							-21.70%
	Land	$	102	Sales comparison approach		Adjustment for differences between the comparable sales	(48.2%) –
							4.50%
	December 31, 2014
		Fair		Valuation Technique			Range
		Value				Unobservable Inputs
	Impaired loans
	One-to-four-family	$	272	Sales comparison approach		Adjustment for differences between the comparable sales	(18.9%) -
							15.00%
	Multi-family	$	2,102	Sales comparison approach		Adjustment for differences between the comparable sales	(11.6%) –
							20.70%
	Other real estate owned
	Commercial real estate	$	389	Sales comparison approach		Adjustment for differences between the comparable sales	(1.2%) –
							-21.70%
	Land	$	102	Sales comparison approach		Adjustment for differences between the comparable sales	(48.2%) –
							4.50%
Carrying Amounts and Estimated Fair Values of Company's Financial Instruments	The carrying amounts and estimated fair values of the Company’s financial instruments are as follows:
				Fair Value Measurements at
				March 31, 2015 (Unaudited) Using:
		Carrying Amount		Level 1			Level 2		Level 3		Total
	Financial assets
	Cash and cash equivalents	$	17,923	$	17,923		$	—	$	—	$	17,923
	Securities available-for-sale		8,641		—			8,641		—		8,641
	Loans receivable, net		57,951		—			—		58,445		58,445
	FHLB stock		921		N/A			N/A		N/A		N/A
	Accrued interest receivable		197		—			19		178		197
	Financial liabilities
	Demand, money market, and savings	$	35,936	$	35,936		$	—	$	—	$	35,936
	Certificates of deposits		39,635		—			39,734		—		39,734
	Advances by borrowers for taxes and insurance		464		464			—		—		464
	Accrued interest payable		1		—			1		—		1
				Fair Value Measurements at
				December 31, 2014 Using:
		Carrying Amount		Level 1			Level 2		Level 3		Total
	Financial assets
	Cash and cash equivalents	$	19,014	$	19,014		$	—	$	—	$	19,014
	Securities available-for-sale		6,636		—			6,636		—		6,636
	Loans receivable, net		60,405		—			—		61,858		61,858
	FHLB stock		921		N/A			N/A		N/A		N/A
	Accrued interest receivable		188		—			15		173		188
	Financial liabilities
	Demand, money market, and savings	$	39,392	$	39,392		$	—	$	—	$	39,392
	Certificates of deposits		40,593		—			40,566		—		40,566
	Advances by borrowers for taxes and insurance		682		682			—		—		682
	Accrued interest payable		—		—			—		—		—

Regulatory_Capital_Matters_Tab

Regulatory Capital Matters (Tables)	3 Months Ended
	Mar. 31, 2015
Banking and Thrift [Abstract]
Actual Capital Levels and Minimum Required Levels for Bank	Actual capital levels and minimum required levels for the Bank were:
		Actual					Minimum Required					Minimum Required
							for Capital					By the Current
							Adequacy Purposes					Order
												(effective
												March 31, 2013)
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	March 31, 2015
	Total capital (to risk-weighted assets)	$	9,883		19.2	%	$	4,112		8	%	$	6,766		13	%
	Common equity Tier 1 capital (to risk-weighted assets)		9,234		18			2,313		4.5			N/A		N/A
	Tier 1 capital (to risk-weighted assets)		9,234		18			3,084		6			N/A		N/A
	Tier 1 capital (to average total assets)		9,234		10.5			2,531		4			7,809		9
	December 31, 2014
	Total capital (to risk-weighted assets)	$	8,510		15.5	%	$	4,387		8	%	$	7,129		13	%
	Tier 1 (core) capital (to risk-weighted assets)		7,818		14.3			2,193		4			N/A		N/A
	Tier 1 (core) capital (to adjusted total assets)		7,818		8.7			3,580		4			8,054		9

Basis_of_Financial_Statement_P2

Basis of Financial Statement Presentation - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Nov. 12, 2014
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock, authorized	20,000,000	20,000,000	998,488
Common stock, par value	$0.01	$0.01	$0.01
Net proceeds from stock offering	$2,504,000
Share conversion ratio		0.3562
Contributions to bank	2,000,000
Payments to fund loans for ESOP	273,330
Net proceeds retained by company	314,000
Stock Offering [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Gross proceeds from stock offering	3,900,000
Common stock sold	390,474
Common stock, sale price	$10
Offering costs	1,400,000
Net proceeds from stock offering	$2,500,000
Common Stock [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Share conversion ratio	0.3562	0.3562

Recent_Losses_and_Management_P1

Recent Losses and Management Plans - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Net loss	($326)	($176)	($1,416)
Total risk-based capital ratio	19.20%		15.50%
Tier 1 leverage capital to average assets ratio	10.50%		8.70%
Cash balance	$326		$43
Consent Order [Member] | Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total risk-based capital ratio		13.00%
Tier 1 leverage capital to average assets ratio		9.00%

Securities_Availablefor_Sale_S

Securities Available-for Sale - Summary Available-for-Sale Securities (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$8,599	$6,632
Gross Unrealized Gains	51	38
Gross Unrealized Losses	-9	-34
Fair Value	8,641	6,636
U.S. Government-Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,000	6,000
Gross Unrealized Gains	15
Gross Unrealized Losses	-9	-34
Fair Value	8,006	5,966
Residential Mortgage-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	599	632
Gross Unrealized Gains	36	38
Fair Value	$635	$670

Securities_Availablefor_Sale_A

Securities Available-for Sale - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Available-for-sale Securities [Abstract]
Available-for-sale securities, sale proceeds	$0	$0
Securities pledged to secure borrowings	$0		$0

Securities_Availablefor_Sale_S1

Securities Available-for Sale - Schedule of Amortized Cost and Fair Value of Available-for-Sale Securities (Detail) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Total securities available for sale	$8,599
Fair Value, Total securities available for sale	8,641
U.S. Government-Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Within one year	0
Amortized Cost, One to five years	7,000
Amortized Cost, Five to ten years	1,000
Fair Value, Within one year	0
Fair Value, One to five years	7,007
Fair Value, Five to ten years	999
Residential Mortgage-Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost, Residential mortgage-backed	599
Fair Value, Residential mortgage-backed	$635

Securities_Availablefor_Sale_S2

Securities Available-for Sale - Schedule of Security with Unrealized Losses (Detail) (U.S. Government-Sponsored Entities [Member], USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
U.S. Government-Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Month, Fair Value	$999	$3,985
Less Than 12 Month, Unrealized Loss	-1	-15
12 Months or More, Fair Value	992	981
12 Months or More, Unrealized Loss	-8	-19
Total, Fair Value	1,991	4,966
Total, Unrealized Loss	($9)	($34)

Loans_Schedule_of_Composition_

Loans - Schedule of Composition of Loan Portfolio by Segment and Class (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	$59,169	$61,650
Premiums and net deferred loan costs	-39	-39
Gross loans, Percent	100.00%	100.00%
Allowance for loan losses	-1,179	-1,206	-1,450	-1,302
Total loans, net	57,951	60,405
Automobile [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	1,241	1,401
Allowance for loan losses	-62	-66
One-To-Four-Family [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	30,799	31,430
Allowance for loan losses	-370	-392
Multi-Family [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	9,717	9,834
Allowance for loan losses	-340	-354
Commercial Real Estate [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	9,580	10,324
Allowance for loan losses	-288	-277
Home Equity Line of Credit [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	6,511	7,360
Allowance for loan losses	-92	-96
Commercial [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	696	826
Allowance for loan losses	-7	-8
Other Consumer [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	1	2
Land [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	208	213
Allowance for loan losses	-6	-6
First Mortgage Loans [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	50,720	52,061
Gross loans, Percent	85.72%	84.45%
First Mortgage Loans [Member] | One-To-Four-Family [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	30,799	31,430
Gross loans, Percent	52.06%	50.98%
First Mortgage Loans [Member] | Multi-Family [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	9,717	9,834
Gross loans, Percent	16.42%	15.95%
Allowance for loan losses	-340	-354	-246	-252
First Mortgage Loans [Member] | Commercial Real Estate [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	9,580	10,324
Gross loans, Percent	16.19%	16.75%
Allowance for loan losses	-288	-277	-257	-300
First Mortgage Loans [Member] | Construction Loans [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	416	260
Gross loans, Percent	0.70%	0.42%
First Mortgage Loans [Member] | Land [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	208	213
Gross loans, Percent	0.35%	0.35%
Allowance for loan losses	-6	-6	-7	-7
Commercial, Consumer and Other Loans [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	8,449	9,589
Gross loans, Percent	14.28%	15.55%
Commercial, Consumer and Other Loans [Member] | Automobile [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	1,241	1,401
Gross loans, Percent	2.10%	2.27%
Commercial, Consumer and Other Loans [Member] | Home Equity Line of Credit [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	6,511	7,360
Gross loans, Percent	11.00%	11.94%
Allowance for loan losses	-92	-96	-137	-78
Commercial, Consumer and Other Loans [Member] | Commercial [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	696	826
Gross loans, Percent	1.18%	1.34%
Commercial, Consumer and Other Loans [Member] | Other Consumer [Member]
Schedule Of Financing Receivable Troubled Debt Restructurings [Line Items]
Gross loans, Amount	$1	$2
Gross loans, Percent	0.00%	0.00%

Loans_Schedule_of_Allowance_fo

Loans - Schedule of Allowance for Loan Losses by Portfolio Segment and Class (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$1,206	$1,302
Provision for loan losses	0	0
Loans charged-off	-29	-40
Recoveries	2	188
Ending balance	1,179	1,450
Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			354
Ending balance	340		354
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			277
Ending balance	288		277
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			96
Ending balance	92		96
Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			6
Ending balance	6		6
First Mortgage Loans [Member] | One To Four Family Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	392	589
Provision for loan losses	-22	82
Ending balance	370	671
First Mortgage Loans [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	354	252
Provision for loan losses	14	-6
Loans charged-off	-28
Ending balance	340	246
First Mortgage Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	277	300
Provision for loan losses	11	-229
Recoveries		186
Ending balance	288	257
First Mortgage Loans [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	7
Provision for loan losses	6	-2
Recoveries	1	2
Ending balance	14
First Mortgage Loans [Member] | Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance		7	6
Provision for loan losses		6
Loans charged-off		-6
Ending balance	6	7	6
Commercial, Consumer and Other Loans [Member] | Other Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	66	56
Provision for loan losses	-3	71
Loans charged-off	-1	-16
Ending balance	62	111
Commercial, Consumer and Other Loans [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses	-1
Recoveries	1
Commercial, Consumer and Other Loans [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	96	78
Provision for loan losses	-4	77
Loans charged-off		-18
Ending balance	92	137
Commercial, Consumer and Other Loans [Member] | Commercial Business Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	8	20
Provision for loan losses	-1	1
Ending balance	$7	$21

Loans_Summary_of_Allowance_for

Loans - Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, individually evaluated for impairment	$4,377	$4,483
Loans, collectively evaluated for impairment	54,792	57,167
Loans, recorded investment	59,169	61,650
Allowance for loan losses, individually evaluated for impairment	253	325	220
Allowance for loan losses, collectively evaluated for impairment	926	881
Allowance for loan losses, recorded investment	1,179	1,206	1,450	1,302
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, collectively evaluated for impairment	1,241	1,401
Loans, recorded investment	1,241	1,401
Allowance for loan losses, collectively evaluated for impairment	62	66
Allowance for loan losses, recorded investment	62	66
Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, collectively evaluated for impairment	208	213
Loans, recorded investment	208	213
Allowance for loan losses, collectively evaluated for impairment	6	6
Allowance for loan losses, recorded investment	6	6
One-To-Four-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, individually evaluated for impairment	1,363	1,403
Loans, collectively evaluated for impairment	29,436	30,027
Loans, recorded investment	30,799	31,430
Allowance for loan losses, individually evaluated for impairment	45	78	147
Allowance for loan losses, collectively evaluated for impairment	325	314
Allowance for loan losses, recorded investment	370	392
Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, individually evaluated for impairment	2,937	2,985
Loans, collectively evaluated for impairment	6,780	6,849
Loans, recorded investment	9,717	9,834
Allowance for loan losses, individually evaluated for impairment	208	247	73
Allowance for loan losses, collectively evaluated for impairment	132	107
Allowance for loan losses, recorded investment	340	354
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, collectively evaluated for impairment	9,580	10,324
Loans, recorded investment	9,580	10,324
Allowance for loan losses, collectively evaluated for impairment	288	277
Allowance for loan losses, recorded investment	288	277
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, collectively evaluated for impairment	6,511	7,360
Loans, recorded investment	6,511	7,360
Allowance for loan losses, collectively evaluated for impairment	92	96
Allowance for loan losses, recorded investment	92	96
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, individually evaluated for impairment	77	95
Loans, collectively evaluated for impairment	619	731
Loans, recorded investment	696	826
Allowance for loan losses, collectively evaluated for impairment	7	8
Allowance for loan losses, recorded investment	7	8
Other Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, collectively evaluated for impairment	1	2
Loans, recorded investment	1	2
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans, collectively evaluated for impairment	416	260
Loans, recorded investment	416	260
Allowance for loan losses, collectively evaluated for impairment	14	7
Allowance for loan losses, recorded investment	$14	$7

Loans_Summary_of_Loans_Individ

Loans - Summary of Loans Individually Evaluated for Impairment by Class (Detail) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Unpaid Principal Balance	$2,268	$4,543	$2,161
Loans, With no related allowance recorded, Recorded Investment	1,515	3,546	1,274
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Loans, With no related allowance recorded, Average Recorded Investment	1,567	1,965	1,775
Loans, With no related allowance recorded, Interest Income Recorded	6	6	14
Loans, With no related allowance recorded,Cash Basis Interest Recorded	6	6	14
Loans, With related allowance recorded, Unpaid Principal Balance	2,890	1,338	3,209
Loans, With related allowance recorded, Recorded Investment	2,862	1,338	3,209
Loans, With related allowance recorded, Allowance for Loan Losses Allocated	253	220	325
Loans, With related allowance recorded, Average Recorded Investment	2,896	3,238	3,028
Loans, With related allowance recorded, Interest Income Recorded	33	33	130
Loans, With related allowance recorded, Cash Basis Interest Recorded	33	33	130
Loans, Unpaid Principal Balance	5,158	5,881	5,370
Loans, Recorded Investment	4,377	4,884	4,483
Loans, Allowance for Loan Losses Allocated	253	220	325
Loans, Average Recorded Investment	4,463	5,203	4,803
Loans, Interest Income Recorded	39	39	144
Loans, Cash Basis Interest Recorded	39	39	144
Automobile [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Land [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Unpaid Principal Balance		131
Loans, With no related allowance recorded, Recorded Investment		102
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Loans, With no related allowance recorded, Average Recorded Investment		102	68
One-To-Four-Family [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Unpaid Principal Balance	1,186	889	1,011
Loans, With no related allowance recorded, Recorded Investment	811	514	543
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Loans, With no related allowance recorded, Average Recorded Investment	854	514	541
Loans, With related allowance recorded, Unpaid Principal Balance	552	566	860
Loans, With related allowance recorded, Recorded Investment	552	566	860
Loans, With related allowance recorded, Allowance for Loan Losses Allocated	45	147	78
Loans, With related allowance recorded, Average Recorded Investment	554	568	588
Loans, With related allowance recorded, Interest Income Recorded	7	7	27
Loans, With related allowance recorded, Cash Basis Interest Recorded	7	7	27
Multi-Family [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Unpaid Principal Balance	802	2,870	811
Loans, With no related allowance recorded, Recorded Investment	627	2,518	636
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Loans, With no related allowance recorded, Average Recorded Investment	630	918	889
Loans, With no related allowance recorded, Interest Income Recorded	6	6	14
Loans, With no related allowance recorded,Cash Basis Interest Recorded	6	6	14
Loans, With related allowance recorded, Unpaid Principal Balance	2,338	772	2,349
Loans, With related allowance recorded, Recorded Investment	2,310	772	2,349
Loans, With related allowance recorded, Allowance for Loan Losses Allocated	208	73	247
Loans, With related allowance recorded, Average Recorded Investment	2,342	2,386	2,369
Loans, With related allowance recorded, Interest Income Recorded	26	26	103
Loans, With related allowance recorded, Cash Basis Interest Recorded	26	26	103
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Unpaid Principal Balance		236
Loans, With no related allowance recorded, Recorded Investment		198
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Loans, With no related allowance recorded, Average Recorded Investment		200	99
Loans, With related allowance recorded, Average Recorded Investment		284	71
Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Home Equity Line of Credit [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Unpaid Principal Balance	280	417	339
Loans, With no related allowance recorded, Recorded Investment	77	214	95
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	0	0	0
Loans, With no related allowance recorded, Average Recorded Investment	83	231	178
Other Consumer [Member]
Financing Receivable, Impaired [Line Items]
Loans, With no related allowance recorded, Allowance for Loan Losses Allocated	$0	$0	$0

Loans_Summary_of_Aging_of_Reco

Loans - Summary of Aging of Recorded Investment in Past Due Loans (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	$0	$0
60 - 89 Days Past due	239
Greater than 90 Days Past Due Still on Accrual	0	0
Nonaccrual	1,232	1,295
Loans Not Past Due	57,698	60,355
Loans, recorded investment	59,169	61,650
Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
Greater than 90 Days Past Due Still on Accrual	0	0
Loans Not Past Due	1,241	1,401
Loans, recorded investment	1,241	1,401
Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
Greater than 90 Days Past Due Still on Accrual	0	0
Loans Not Past Due	208	213
Loans, recorded investment	208	213
One-To-Four-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
60 - 89 Days Past due	178
Greater than 90 Days Past Due Still on Accrual	0	0
Nonaccrual	811	847
Loans Not Past Due	29,810	30,583
Loans, recorded investment	30,799	31,430
Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
Greater than 90 Days Past Due Still on Accrual	0	0
Nonaccrual	344	353
Loans Not Past Due	9,373	9,481
Loans, recorded investment	9,717	9,834
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
Greater than 90 Days Past Due Still on Accrual	0	0
Loans Not Past Due	9,580	10,324
Loans, recorded investment	9,580	10,324
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
Greater than 90 Days Past Due Still on Accrual	0	0
Loans Not Past Due	416	260
Loans, recorded investment	416	260
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
60 - 89 Days Past due	61
Greater than 90 Days Past Due Still on Accrual	0	0
Loans Not Past Due	6,450	7,360
Loans, recorded investment	6,511	7,360
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
Greater than 90 Days Past Due Still on Accrual	0	0
Nonaccrual	77	95
Loans Not Past Due	619	731
Loans, recorded investment	696	826
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past due	0	0
Greater than 90 Days Past Due Still on Accrual	0	0
Loans Not Past Due	1	2
Loans, recorded investment	$1	$2

Loans_Summary_of_Loans_Classif

Loans - Summary of Loans Classified by Risk Category (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	$59,169	$61,650
Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	1,241	1,401
Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	208	213
One-To-Four-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	30,799	31,430
Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	9,717	9,834
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	9,580	10,324
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	416	260
Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	6,511	7,360
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	696	826
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	1	2
Pass [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	57,937	60,355
Pass [Member] | Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	1,241	1,401
Pass [Member] | Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	208	213
Pass [Member] | One-To-Four-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	29,988	30,583
Pass [Member] | Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	9,373	9,481
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	9,580	10,324
Pass [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	416	260
Pass [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	6,511	7,360
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	619	731
Pass [Member] | Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	1	2
Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	1,232	1,295
Substandard [Member] | One-To-Four-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	811	847
Substandard [Member] | Multi-Family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	344	353
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Loans	$77	$95

Loans_Additional_Information_D

Loans - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
	SecurityLoan	SecurityLoan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Troubled debt restructuring loans	$3,667,000	$3,736,000
Number of loans modified as troubled debt restructurings	0	0
Number of non-accruing troubled debt restructured loans	3	3
Non-accruing troubled debt restructured loans	521,000	548,000
Troubled debt restructuring, number of loans agreed to pay	2
Payment of troubled debt restructurings	448,000
Troubled debt restructurings, payment default period	90 days
Troubled debt restructurings, subsequent payment default	0	231,000
Allowance for credit losses, recoveries		60,000
Troubled debt restructuring loans	3,667,000	3,736,000
Troubled Debt Restructurings [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Troubled debt restructuring loans	2,863,000	2,904,000
Troubled debt restructuring loans reserve	253,000	293,000
Troubled debt restructuring loans	$2,863,000	$2,904,000

Loss_Per_Share_Schedule_of_Rec

Loss Per Share - Schedule of Reconciliation of Components Used to Compute Basic and Diluted Earnings (Loss) Per Share (Detail) (USD $)	3 Months Ended			12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014		Dec. 31, 2014
Earnings Per Share [Abstract]
Net income (loss)	($326)	($176)		($1,416)
Weighted average common shares outstanding	663,369	680,353
Basic and diluted income (loss) per share	($0.49)	($0.26)	[1]
[1]	Per share amounts for 2014 have been adjusted to reflect the completion of the Company's conversion offering on January 22, 2015 and the exchange of the existing shares of Ben Franklin Financial, Inc. (a Federal corporation) at an exchange ratio of .3562 for each existing share.

Loss_Per_Share_Additional_Info

Loss Per Share - Additional Information (Parenthetical) (Detail)	Dec. 31, 2014
Earnings Per Share [Abstract]
Share conversion ratio	0.3562

Fair_Value_Measures_Summary_of

Fair Value Measures - Summary of Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Securities available for sale	$8,641	$6,636
U.S. Government-Sponsored Entities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Securities available for sale	8,006	5,966
Residential Mortgage-Backed [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Securities available for sale	635	670
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Securities available for sale	8,641	6,636
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government-Sponsored Entities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Securities available for sale	8,006	5,966
Significant Other Observable Inputs (Level 2) [Member] | Residential Mortgage-Backed [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Securities available for sale	$635	$670

Fair_Value_Measures_Additional

Fair Value Measures - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value transfer between level 1, level 2 and level 3	$0		$0
Impaired loans aggregate balance	2,310,000		2,653,000
Impaired loans valuation allowance	208,000		279,000
Provision for loan losses	0	0
Carrying value of repossessed assets	493,000		504,000
Repossessed Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value of repossessed assets	493,000		504,000
Cost basis of repossessed assets	646,000		657,000
Valuation allowance	153,000		153,000
Written down value of repossessed assets	$0		$0

Fair_Value_Measures_Summary_of1

Fair Value Measures - Summary of Assets Measured at Fair Value on Non-Recurring Basis (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Impaired loans
Total impaired loans	$2,102	$2,374
Repossessed assets
Total repossessed assets	493	504
Automobile [Member]
Repossessed assets
Total repossessed assets	2	13
Land [Member]
Repossessed assets
Total repossessed assets	102	102
One-To-Four-Family [Member]
Impaired loans
Total impaired loans		272
Multi-Family [Member]
Impaired loans
Total impaired loans	2,102	2,102
Commercial Real Estate [Member]
Repossessed assets
Total repossessed assets	389	389
Significant Unobservable Inputs (Level 3) [Member]
Impaired loans
Total impaired loans	2,102	2,374
Repossessed assets
Total repossessed assets	493	504
Significant Unobservable Inputs (Level 3) [Member] | Automobile [Member]
Repossessed assets
Total repossessed assets	2	13
Significant Unobservable Inputs (Level 3) [Member] | Land [Member]
Repossessed assets
Total repossessed assets	102	102
Significant Unobservable Inputs (Level 3) [Member] | One-To-Four-Family [Member]
Impaired loans
Total impaired loans		272
Significant Unobservable Inputs (Level 3) [Member] | Multi-Family [Member]
Impaired loans
Total impaired loans	2,102	2,102
Significant Unobservable Inputs (Level 3) [Member] | Commercial Real Estate [Member]
Repossessed assets
Total repossessed assets	$389	$389

Fair_Value_Measures_Quantitati

Fair Value Measures - Quantitative Information about Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on a Non-recurring Basis (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Impaired Loans [Member] | Multi-Family [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$2,102	$2,102
Valuation Technique	Sales comparison approach	Sales comparison approach
Unobservable Inputs	Adjustment for differences between the comparable sales	Adjustment for differences between the comparable sales
Impaired Loans [Member] | Multi-Family [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	-11.60%	-11.60%
Impaired Loans [Member] | Multi-Family [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	20.70%	20.70%
Impaired Loans [Member] | One-To-Four-Family [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		272
Valuation Technique		Sales comparison approach
Unobservable Inputs		Adjustment for differences between the comparable sales
Impaired Loans [Member] | One-To-Four-Family [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range		-18.90%
Impaired Loans [Member] | One-To-Four-Family [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range		15.00%
Other Real Estate Owned [Member] | Land [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	102	102
Valuation Technique	Sales comparison approach	Sales comparison approach
Unobservable Inputs	Adjustment for differences between the comparable sales	Adjustment for differences between the comparable sales
Other Real Estate Owned [Member] | Land [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	-48.20%	-48.20%
Other Real Estate Owned [Member] | Land [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	4.50%	4.50%
Other Real Estate Owned [Member] | Commercial Real Estate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$389	$389
Valuation Technique	Sales comparison approach	Sales comparison approach
Unobservable Inputs	Adjustment for differences between the comparable sales	Adjustment for differences between the comparable sales
Other Real Estate Owned [Member] | Commercial Real Estate [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	-1.20%	-1.20%
Other Real Estate Owned [Member] | Commercial Real Estate [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	-21.70%	21.70%

Fair_Value_Measures_Carrying_A

Fair Value Measures - Carrying Amounts and Estimated Fair Values of Company's Financial Instruments (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financial assets
Cash and cash equivalents	$17,923	$19,014	$21,966	$19,960
Securities available-for-sale	8,641	6,636
Loans receivable, net	58,445	61,858
FHLB stock	921	921
Accrued interest receivable	197	188
Financial liabilities
Demand, money market, and savings	35,936	39,392
Certificates of deposits	39,734	40,566
Advances by borrowers for taxes and insurance	464	682
Accrued interest payable	1
Level 1 [Member]
Financial assets
Cash and cash equivalents	17,923	19,014
Financial liabilities
Demand, money market, and savings	35,936	39,392
Advances by borrowers for taxes and insurance	464	682
Level 2 [Member]
Financial assets
Securities available-for-sale	8,641	6,636
Accrued interest receivable	19	15
Financial liabilities
Certificates of deposits	39,734	40,566
Accrued interest payable	1
Level 3 [Member]
Financial assets
Loans receivable, net	58,445	61,858
Accrued interest receivable	178	173
Carrying Amount [Member]
Financial assets
Cash and cash equivalents	17,923	19,014
Securities available-for-sale	8,641	6,636
Loans receivable, net	57,951	60,405
FHLB stock	921	921
Accrued interest receivable	197	188
Financial liabilities
Demand, money market, and savings	35,936	39,392
Certificates of deposits	39,635	40,593
Advances by borrowers for taxes and insurance	464	682
Accrued interest payable	$1

Regulatory_Capital_Matters_Add

Regulatory Capital Matters - Additional Information (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital to risk-weighted assets	4.50%
Total risk based capital ratio	13.00%	13.00%
Tier one leverage capital ratio	9.00%	9.00%
Description of prompt corrective action regulations provide	The prompt corrective action regulations provide five classifications, including well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If undercapitalized, asset growth and expansion are limited and plans for capital restoration are required.
Capital conservation buffer	2.50%
Community banks capital requirement	$9,883	$8,510
Basel Three [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital to risk-weighted assets	4.50%
Common equity tier 1 capital required to be well capitalized to risk-weighted assets	6.00%
Minimum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total risk based capital ratio			13.00%
Tier one leverage capital ratio			9.00%
Maximum [Member] | One-Time-Aoci-Opt-Out-Election [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Community banks capital requirement	$250,000,000

Regulatory_Capital_Matters_Act

Regulatory Capital Matters - Actual Capital Levels and Minimum Required Levels for Bank (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Banking and Thrift [Abstract]
Total capital (to risk-weighted assets), Actual Amount	$9,883	$8,510
Common equity Tier 1 capital (to risk-weighted assets), Actual Amount	9,234
Tier 1 (core) capital (to risk-weighted assets), Actual Amount	9,234	7,818
Tier 1 (core) capital (to adjusted total assets), Actual Amount	9,234	7,818
Total capital (to risk-weighted assets), Actual Ratio	19.20%	15.50%
Common equity Tier 1 capital (to risk-weighted assets), Actual Ratio	18.00%
Tier 1 (core) capital (to risk-weighted assets), Actual Ratio	18.00%	14.30%
Tier 1 (core) capital (to adjusted total assets), Actual Ratio	10.50%	8.70%
Total capital (to risk-weighted assets), Minimum Required for Capital Adequacy Purposes Amount	4,112	4,387
Common equity Tier 1 capital (to risk-weighted assets), Minimum Required for Capital Adequacy Purposes Amount	2,313
Tier 1 (core) capital (to risk-weighted assets), Minimum Required for Capital Adequacy Purposes Amount	3,084	2,193
Tier 1 (core) capital (to adjusted total assets), Minimum Required for Capital Adequacy Purposes Amount	2,531	3,580
Total capital (to risk-weighted assets), Minimum Required for Capital Adequacy Purposes Ratio	8.00%	8.00%
Common equity Tier 1 capital (to risk-weighted assets), Minimum Required for Capital Adequacy Purposes Ratio	4.50%
Tier 1 (core) capital (to risk-weighted assets), Minimum Required for Capital Adequacy Purposes Ratio	6.00%	4.00%
Tier 1 (core) capital (to adjusted total assets), Minimum Required for Capital Adequacy Purposes Ratio	4.00%	4.00%
Total capital (to risk-weighted assets), Minimum Required By the Current Order Amount	6,766	7,129
Tier 1 (core) capital (to adjusted total assets), Minimum Required By the Current Order Amount	$7,809	$8,054
Total capital (to risk-weighted assets), Minimum Required By the Current Order Ratio	13.00%	13.00%
Tier 1 (core) capital (to adjusted total assets), Minimum Required By the Current Order Ratio	9.00%	9.00%