Charter Financial (CHFN) 10-Q 8 Aug 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Jun. 30, 2018	Aug. 02, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	Charter Financial Corp
Document Type	10-Q
Current Fiscal Year End Date	--09-30
Entity Common Stock, Shares Outstanding		15,262,472
Amendment Flag	false
Entity Central Index Key	1,478,726
Entity Filer Category	Accelerated Filer
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) - USD ($)	Jun. 30, 2018	Sep. 30, 2017	[1]
Assets
Cash and amounts due from depository institutions	$ 20,328,705	$ 25,455,465
Interest-earning deposits in other financial institutions	150,570,173	126,882,924
Cash and cash equivalents	170,898,878	152,338,389
Loans held for sale, fair value of $1,998,594 and $1,998,988	1,965,657	1,961,185
Certificates of deposit held at other financial institutions	4,027,270	7,514,630
Investment securities available for sale	157,232,405	183,789,821
Federal Home Loan Bank stock	4,075,200	4,054,400
Restricted securities, at cost	279,000	279,000
Loans receivable	1,164,306,803	1,161,519,752
Unamortized loan origination fees, net	(1,284,342)	(1,165,148)
Allowance for loan losses	(11,496,661)	(11,078,422)
Loans receivable, net	1,151,525,800	1,149,276,182
Other real estate owned	227,531	1,437,345
Accrued interest and dividends receivable	4,354,702	4,197,708
Premises and equipment, net	28,857,528	29,578,513
Goodwill	39,347,378	39,347,378
Other intangible assets, net of amortization	3,064,830	3,614,833
Cash surrender value of life insurance	54,546,197	53,516,317
Deferred income taxes	3,876,928	5,970,282
Other assets	1,555,998	3,282,577
Total assets	1,625,835,302	1,640,158,560
Liabilities:
Deposits	1,317,738,045	1,339,143,287
Short-term borrowings	5,010,175	0
Long-term borrowings	55,000,925	60,023,100
Floating rate junior subordinated debt	6,827,470	6,724,646
Advance payments by borrowers for taxes and insurance	2,366,262	2,956,441
Other liabilities	14,485,773	17,112,581
Total liabilities	1,401,428,650	1,425,960,055
Stockholders’ equity:
Common stock, $0.01 par value; 15,262,472 shares issued and outstanding at June 30, 2018 and 15,115,883 shares issued and outstanding at September 30, 2017	152,625	151,159
Preferred stock, $0.01 par value; 50,000,000 shares authorized at June 30, 2018 and September 30, 2017	0	0
Additional paid-in capital	86,569,306	85,651,391
Unearned compensation – ESOP	(4,192,308)	(4,673,761)
Retained earnings	145,268,886	134,207,368
Accumulated other comprehensive loss	(3,391,857)	(1,137,652)
Total stockholders’ equity	224,406,652	214,198,505	[2]
Total liabilities and stockholders’ equity	$ 1,625,835,302	$ 1,640,158,560
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.
[2]	Financial information at September 30, 2017 has been derived from audited financial statements.

CONDENSED CONSOLIDATED STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) (Parenthetical) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Statement of Financial Position [Abstract]
Loans held for sale, fair value	$ 1,998,594	$ 1,998,988
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	15,262,472	15,115,883
Common stock, shares outstanding (in shares)	15,262,472	15,115,883
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000

CONDENSED CONSOLIDATED STATEME4

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income:
Loans receivable	$ 15,168,739	$ 12,276,095	$ 45,043,315	$ 36,749,414
Taxable investment securities	1,021,648	1,036,572	3,081,621	3,236,212
Nontaxable investment securities	3,274	4,571	9,822	13,714
Federal Home Loan Bank stock	57,813	39,913	161,744	119,432
Interest-earning deposits in other financial institutions	612,023	235,928	1,459,216	560,055
Certificates of deposit held at other financial institutions	17,079	30,953	62,714	112,357
Restricted securities	3,481	2,855	9,779	8,107
Total interest income	16,884,057	13,626,887	49,828,211	40,799,291
Interest expense:
Deposits	1,596,469	1,182,649	4,534,057	3,506,425
Borrowings	367,493	327,790	1,102,532	1,077,644
Floating rate junior subordinated debt	149,807	129,051	427,674	373,473
Total interest expense	2,113,769	1,639,490	6,064,263	4,957,542
Net interest income	14,770,288	11,987,397	43,763,948	35,841,749
Provision for loan losses	0	0	(350,000)	(900,000)
Net interest income after provision for loan losses	14,770,288	11,987,397	44,113,948	36,741,749
Noninterest income:
Service charges on deposit accounts	2,097,870	1,972,205	6,194,239	5,560,729
Bankcard fees	1,690,450	1,443,151	4,692,182	4,092,195
Gain on investment securities available for sale	0	0	1,074	247,780
Gain (loss) on sale of other assets held for sale	0	0	265,806	(38,528)
Bank owned life insurance	338,992	305,709	1,029,880	884,976
Gain on sale of loans	563,567	542,762	1,640,090	1,816,848
Brokerage commissions	216,770	185,674	552,308	576,237
Recoveries on acquired loans previously covered under FDIC-assisted acquisitions	0	0	0	250,000
Other	316,557	189,996	1,203,168	778,261
Total noninterest income	5,224,206	4,639,497	15,578,747	14,168,498
Noninterest expenses:
Salaries and employee benefits	7,049,321	6,530,408	20,429,841	18,742,656
Occupancy	1,549,444	1,156,618	4,580,138	3,699,807
Data processing	1,279,244	1,091,208	3,681,398	3,004,137
Legal and professional	293,820	384,240	834,637	1,055,985
Marketing	437,717	383,890	1,245,999	1,152,357
Federal insurance premiums and other regulatory fees	203,648	198,350	699,604	561,106
Net cost (benefit) of operations of real estate owned	8,307	18,079	(40,667)	(327,365)
Furniture and equipment	242,536	202,259	787,919	604,696
Postage, office supplies and printing	201,526	224,073	646,850	717,775
Core deposit intangible amortization expense	168,501	117,806	550,003	420,902
Merger-related expenses	843,887	131	1,770,517	131
Other	989,002	790,073	2,687,898	2,504,167
Total noninterest expenses	13,266,953	11,097,135	37,874,137	32,136,354
Income before income taxes	6,727,541	5,529,759	21,818,558	18,773,893
Income tax expense	2,081,428	2,015,909	7,525,933	6,897,581
Net income	$ 4,646,113	$ 3,513,850	$ 14,292,625	$ 11,876,312
Basic net income per share (in dollars per share)	$ 0.32	$ 0.24	$ 0.99	$ 0.83
Diluted net income per share (in dollars per share)	$ 0.30	$ 0.23	$ 0.94	$ 0.78
Weighted average number of common shares outstanding (in shares)	14,544,417	14,353,082	14,490,993	14,293,859
Weighted average number of common and potential common shares outstanding (in shares)	15,413,155	15,256,623	15,263,528	15,197,400

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 4,646,113	$ 3,513,850	$ 14,292,625	$ 11,876,312
Reclassification adjustment for net gains realized in net income, net of taxes of $0, $0, $312 and $95,643, respectively	0	0	(762)	(152,137)
Net unrealized holding (losses) gains on investment and mortgage securities available for sale arising during the period, net of taxes of $(155,602), $223,156, $(921,762) and $(1,472,726), respectively	(380,402)	354,968	(2,253,442)	(2,342,626)
Comprehensive income	$ 4,265,711	$ 3,868,818	$ 12,038,421	$ 9,381,549

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Taxes on reclassification adjustment for net gain/loss realized in net income	$ 0	$ 0	$ 312	$ 95,643
Tax on net unrealized holding gain/loss on investment and mortgage securities available for sale arising during the period	$ (155,602)	$ 223,156	$ (921,762)	$ (1,472,726)

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (UNAUDITED) - 9 months ended Jun. 30, 2018 - USD ($)		Total		Restricted Stock	Common stock	Additional paid-in capital	Unearned compensation ESOP	Retained earnings	Accumulated other comprehensive loss
Balance (in shares) at Sep. 30, 2017	[1]				15,115,883
Balance at Sep. 30, 2017	[1]	$ 214,198,505	[2]		$ 151,159	$ 85,651,391	$ (4,673,761)	$ 134,207,368	$ (1,137,652)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		14,292,625						14,292,625
Dividends paid, $0.24 per share		(3,475,648)						(3,475,648)
Change in other comprehensive loss		(2,009,664)							(2,009,664)
Reclassification of tax effects in AOCI resulting from the new federal corporate income tax rate		0						244,541	(244,541)
Allocation of ESOP common stock		1,021,663				540,210	481,453
Effect of restricted stock awards		621,149				621,149
Stock option expense		240,655				240,655
Issuance of common stock, stock option exercises (in shares)					258,840
Issuance of common stock, stock option exercises		508,553			$ 2,589	505,964
Issuance of common stock, restricted stock (in shares)					22,500
Issuance of common stock, restricted stock		0			$ 225	(225)
Cancellation of restricted stock (in shares)				(15,000)	(15,000)
Cancellation of restricted stock		0			$ (150)	150
Shares of common stock withheld in net settlement upon exercise of stock options (in shares)					(105,387)
Shares of common stock withheld in net settlement upon exercise of stock options		(728,181)			$ (1,054)	(727,127)
Repurchase of shares (in shares)					(14,364)
Repurchase of shares		(263,005)			$ (144)	(262,861)
Balance (in shares) at Jun. 30, 2018					15,262,472
Balance at Jun. 30, 2018		$ 224,406,652			$ 152,625	$ 86,569,306	$ (4,192,308)	$ 145,268,886	$ (3,391,857)
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.
[2]	Financial information at September 30, 2017 has been derived from audited financial statements.

CONDENSED CONSOLIDATED STATEME8

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) (Parenthetical)	9 Months Ended
	Jun. 30, 2018$ / shares
Statement of Stockholders' Equity [Abstract]
Dividends paid (in dollars per share)	$ 0.24

CONDENSED CONSOLIDATED STATEME9

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	9 Months Ended
	Jun. 30, 2018		Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 14,292,625		$ 11,876,312
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	(350,000)		(900,000)
Depreciation and amortization	1,594,476		1,305,818
Deferred income tax expense	2,915,402		0
Accretion and amortization of premiums and discounts, net	625,330		767,008
Accretion of fair value discounts related to acquired loans	(1,710,274)		(1,255,154)
Gain on sale of loans	(1,640,090)		(1,816,848)
Proceeds from sale of loans	58,927,681		73,225,998
Originations and purchases of loans held for sale	(57,519,717)		(70,907,065)
Gain on sale of mortgage-backed securities, collateralized mortgage obligations and other investments	(1,074)		(247,780)
Write down of real estate owned	88,674		19,784
Gain on sale of real estate owned	(191,202)		(509,129)
(Gain) loss on sale of fixed assets	(265,806)		46,556
Restricted stock award expense	621,149		596,036
Stock option expense	240,655		248,337
Increase in cash surrender value of bank owned life insurance	(1,029,880)		(884,976)
Changes in assets and liabilities:
Increase in accrued interest and dividends receivable	(156,994)		(132,394)
Decrease (increase) in other assets	1,314,233		(24,152)
(Decrease) increase in other liabilities	(1,605,145)		878,811
Net cash provided by operating activities	16,150,043		12,287,162
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	13,336		2,078,436
Principal collections on investment securities available for sale	25,570,967		13,525,105
Purchase of investment securities available for sale	(14,874,249)		(20,335,542)
Proceeds from maturities or calls of investment securities available for sale	12,290,000		19,157,491
Purchase of Federal Home Loan Bank stock	(20,800)		(122,800)
Net decrease in certificates of deposit held at other financial institutions	3,473,000		6,718,000
Net increase in loans receivable	(467,634)		(37,318,650)
Proceeds from sale of real estate owned	1,545,302		2,485,558
Proceeds from sale of premises and equipment	905,806		221,483
Purchases of premises and equipment, net of dispositions	(323,488)		(1,188,434)
Net cash provided by (used in) investing activities	28,112,240		(14,779,353)
Cash flows from financing activities:
Repurchase of shares	(263,005)		(1,881)
Issuance of common stock	508,553		594,494
Dividends paid	(3,475,648)		(2,571,839)
Taxes paid in net settlement of tax obligation upon exercise of stock options	(728,181)		0
Net (decrease) increase in deposits	(21,153,334)		32,671,884
Proceeds from Federal Home Loan Bank advances	1,000,000		26,000,000
Principal payments on Federal Home Loan Bank advances	(1,000,000)		(26,000,000)
Net (decrease) increase in advance payments by borrowers for taxes and insurance	(590,179)		94,048
Net cash (used in) provided by financing activities	(25,701,794)		30,786,706
Net increase in cash and cash equivalents	18,560,489		28,294,515
Cash and cash equivalents at beginning of period	152,338,389	[1]	91,849,499
Cash and cash equivalents at end of period	170,898,878		120,144,014
Supplemental disclosures of cash flow information:
Interest paid	6,196,430		5,158,767
Income taxes paid	3,463,059		5,483,170
Supplemental disclosure of noncash activities:
Real estate acquired through foreclosure of collateral on loans receivable	232,960		1,227,365
Issuance of common stock under stock benefit plan	1,021,663		684,018
Unrealized loss on investment securities available for sale, net	$ (2,009,664)		$ (2,494,764)
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Nature of Operations

Nature of Operations	9 Months Ended
	Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Nature of Operations Charter Financial Corporation (“Charter Financial” or the “Company”) is a savings and loan holding company that was incorporated under the laws of the State of Maryland in April 2013 to serve as the holding company for CharterBank (“CharterBank” or “the Bank”). The Bank is a federally-chartered savings bank that was originally founded in 1954 as a federally-chartered mutual savings and loan association. On April 8, 2013, the Company completed its conversion and reorganization pursuant to which it converted from the mutual holding company form of organization to the stock holding company form of organization. The Company sold 14.3 million shares of common stock for gross offering proceeds of $142.9 million in the offering. Following the conversion and reorganization, the Bank became 100% owned by Charter Financial and Charter Financial became 100% owned by public shareholders. As of June 30, 2018 , the Company operated 22 branch offices in the metropolitan Atlanta area (“Metro Atlanta” or the “MSA”), including one cashless branch office in Norcross, Georgia, the I-85 corridor south to Auburn, Alabama, and the Florida Gulf Coast. On April 24, 2018 , the Company and CenterState Bank Corporation, a Florida corporation (“CenterState”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) whereby the Company will be merged with and into CenterState (the “Merger”). Pursuant to and simultaneously with entering into the Merger Agreement, CharterBank and CenterState's wholly owned subsidiary bank, CenterState Bank, N.A. (“CenterState Bank”), entered into a Plan of Merger and Merger Agreement whereby CharterBank will be merged with and into CenterState Bank immediately following the Merger (the “Bank Merger”). See Note 4: Business Combinations for further information on the proposed Merger.

Basis of Presentation

Basis of Presentation	9 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim consolidated financial statements of Charter Financial and the Bank include the accounts of the Company and the Bank as of June 30, 2018 and September 30, 2017 (derived from audited financial statements), and for the three and nine -month periods ended June 30, 2018 and 2017 . All intercompany accounts and transactions have been eliminated in consolidation. The unaudited interim consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, the unaudited interim condensed consolidated financial statements include all necessary adjustments, consisting of normal recurring accruals, necessary for a fair presentation for the periods presented. The results of operations for the three and nine -month period ended June 30, 2018 , are not necessarily indicative of the results that may be expected for the entire year or any other interim period. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, the estimates used for fair value acquisition accounting, the estimate of expected cash flows on purchased impaired and other acquired loans, and the assessment for other-than-temporary impairment of investment securities, mortgage-backed securities, collateralized mortgage-backed securities and collateralized mortgage obligations. Certain reclassifications of prior fiscal year balances have been made to conform to classifications used in the current fiscal year. These reclassifications did not change net income or stockholders' equity.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Jun. 30, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-Employee Share-Based Payment Accounting (“ASU 2018-07”). The amendments in this update are part of the FASB's Simplification Initiative, and expand the scope of Topic 718, Compensation - Stock Compensation, which currently only includes share-based payments issued to employees, to also include share-based payments issued to nonemployees for goods and services. As a result, the accounting for share-based payments to nonemployees and employees will be substantially aligned. The ASU supersedes Subtopic 505-50, Equity - Equity-Based Payments to Non-Employees. The amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor's own operations by issuing share-based payment awards except when they are used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Topic 606, Revenue from Contracts with Customers. The amendments change numerous current GAAP practices for share-based payments to nonemployees, including the overall measurement objective, measurement date, awards with performance conditions, and classification reassessment of certain equity-classified awards. The amendments in this ASU affect all companies that enter into share-based payment transactions for acquiring goods or services from nonemployees, and are effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted, but no earlier than a company's adoption date of Topic 606. The Company does not anticipate a material effect from adoption of this standard on its consolidated financial statements. In May 2018, the FASB issued ASU 2018-06, Codification Improvements to Topic 942, Financial Services - Depository and Lending . The amendments in this update are intended to supersede outdated guidance related to the Office of the Comptroller of the Currency's (“OCC”) Banking Circular 202, Accounting for Net Deferred Tax Charges (Circular 202). The guidance has been rescinded by the OCC and is no longer relevant. Prior guidance from the OCC limited the net deferred tax debits that can be carried on a bank's statement of condition for regulatory purposes to the amount that would be recoverable by carryback of net operating losses. With the guidance now rescinded, that limitation for regulatory purposes is no longer applicable. The amendment is effective upon issuance. The guidance does not impact the Company's consolidated statements of financial condition. In March 2018, the FASB issued ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 . The amendments in this update address certain accounting items for current and deferred income taxes related to the Tax Cuts and Jobs Act (“the Tax Act”). Under these amendments, a Company is expected to record any income tax effects that can be reasonably estimated from the Tax Act in its financial statements, while allowing for those items which cannot be reasonably estimated to remain unrecorded. The amendments are effective immediately. The Company recorded additions to income tax expense in its consolidated statements of income that could reasonably be estimated in the amount of $40,000 and $1.5 million during the three and nine months ended June 30, 2018 , respectively. In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The amendments in this update allow for a reclassification of stranded tax effects resulting from the Tax Act from accumulated other comprehensive income to retained earnings. The amendments in this update are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted and the Company elected to early adopt this guidance effective March 31, 2018. The adoption resulted in a reclassification of stranded tax effects of $245,000 from accumulated other comprehensive loss to retained earnings in the Company's consolidated statements of financial condition and stockholders' equity at June 30, 2018 . In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , which is intended to better align hedge accounting with an organization's risk management activities in the financial statements. The ASU also simplifies the application of hedge accounting guidance in areas where practice issues exist. The amendments in this ASU are intended to address financial statement user concerns over hedge accounting through changes to the guidance that will accomplish the following: (1) expand hedge accounting for nonfinancial and financial risk components and amend measurement methodologies to more closely align hedge accounting with a company's risk management activities; (2) decrease the complexity of preparing and understanding hedge results through eliminating the separate measurement and reporting of hedge ineffectiveness; (3) enhance transparency, comparability, and understandability of hedge results through enhanced disclosures and changing the presentation of hedge results to align the effects of the hedging instrument and the hedged item; and (4) reduce the cost and complexity of applying hedge accounting by simplifying the manner in which assessments of hedge effectiveness may be performed. The standard applies broadly to any company that elects to apply hedge accounting in accordance with current accounting principles generally accepted in the United States of America (“GAAP”), and will be effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company does not currently apply hedge accounting but may do so in the future, and is in the process of determining the impact this standard would have on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , which sets forth a "current expected credit loss" (“CECL”) model requiring the Company to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. For public business entities that are U.S. Securities and Exchange Commission filers, the amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company has assembled a transition team to assess the adoption of this ASU, which is in the process of developing a project plan regarding implementation and has contracted with a third-party provider to implement enhanced modeling techniques and a more automated database solution. The team is currently evaluating data and software requirements for implementation, and plans to run parallel models for a year prior to implementation. The Company is currently in the process of determining the impact of adopting this standard. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The FASB issued this ASU to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet by lessees for those leases classified as operating leases under current U.S. GAAP and disclosing key information about leasing arrangements. The amendments in this ASU are effective for public business entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early application of this ASU is permitted for all entities. The Company is in the process of evaluating its current inventory of leases to determine the impact of adoption of this standard. In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Recognition and Measurement of Financial Assets and Liabilities , which is intended to improve the recognition and measurement of financial instruments by requiring: equity investments (other than equity method or consolidation) to be measured at fair value with changes in fair value recognized in net income; public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; eliminating the requirement to disclose the fair value of financial instruments measured at amortized cost for organizations that are not public business entities; eliminating the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; and requiring a reporting organization to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This ASU is effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. This ASU permits early adoption of the instrument-specific credit risk provision. The adoption of ASU 2016-01 on October 1, 2018, is not expected to have a material impact on the Company's consolidated financial position, results of operations or cash flows. In May 2014, the FASB issued ASU 2014-09, Revenue From Contracts With Customers . This standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry specific guidance. The core principle of the revenue model is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard was to be effective for annual reporting periods beginning after December 15, 2016. In August 2015, the FASB issued ASU 2015-14, deferring the effective date for the standard to reporting periods beginning after December 15, 2017. As a financial institution, the Company's revenue is more significantly weighted towards net interest income on its financial assets and liabilities, which is explicitly excluded from the scope of the new standard. The Company continues to assess its revenue streams and review its contracts with customers that are potentially affected by the new guidance, such as fees on deposits, gains and losses on the sale of other real estate owned, bankcard fees and brokerage commissions, to determine the potential impact the new guidance is expected to have on the Company's consolidated financial statements. The Company's revenue recognition pattern for these revenue streams, however, is not expected to change materially from current practice. The Company also continues to follow implementation issues specific to financial institutions which are still under discussion by the FASB's Transition Resource Group. The Company plans to adopt the ASU on October 1, 2018, most likely under the modified retrospective approach.

Business Combinations

Business Combinations	9 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Business Combinations	Business Combinations Pending acquisition by CenterState Bank Corporation On April 24, 2018 , the Company and CenterState entered into the Merger Agreement whereby the Company will be merged with and into CenterState. Pursuant to and simultaneously with entering into the Merger Agreement, CharterBank and CenterState Bank entered into a Plan of Merger and Merger Agreement whereby CharterBank will be merged with and into CenterState Bank immediately following the Merger. Pursuant to the Merger Agreement, each outstanding share of Charter common stock issued and outstanding immediately prior to the effective time of the Merger will be converted into the right to receive 0.738 shares of CenterState common stock and a cash amount equal to $2.30 , provided that cash in lieu of any fractional shares of CenterState common stock will be paid. Each outstanding share of CenterState stock shall remain outstanding and unaffected by the Merger. Each option to purchase shares of Charter common stock will be converted into the right to receive a cash payment equal to the product (i) of the number of shares of Charter common stock underlying such option and (ii) $23.00 minus the exercise price per share under such option. Immediately prior to the effective time of the Merger, all shares of Charter restricted stock shall vest in full and shall be treated like all other issued and outstanding shares of Charter common stock. As of the announcement date on April 24, 2018 , based on CenterState's closing stock price of $27.72 , the total merger consideration amounted to $360.1 million , or approximately $22.76 per share. The Merger Agreement has been unanimously approved by the boards of directors of the Company and CenterState, and is expected to close in the third or fourth quarter of calendar 2018 subject to customary conditions, including receipt of all applicable regulatory approvals and the approval of the stockholders of the Company. During the three and nine months ended June 30, 2018 , the Company recorded $844,000 of merger related costs from the proposed CenterState acquisition. Acquisition of Resurgens Bancorp On September 1, 2017 , the Company completed its acquisition of Resurgens Bancorp (“Resurgens”) and its wholly-owned subsidiary, Resurgens Bank, for cash consideration of $25.8 million . Upon completion of the acquisition, Resurgens merged into Charter Financial, and Resurgens Bank merged into CharterBank. The acquisition expanded the bank's presence in the Atlanta market with two branches in DeKalb County. The following table provides a summary of the assets acquired and liabilities assumed of Resurgens as recorded by the Company. As provided for under GAAP, management has up to one year following the date of acquisition to finalize the fair values of the acquired assets and assumed liabilities. The fair values shown in the following table have been determined by management to be the Day 1 Fair Values. Purchase Price: Cash paid to Resurgens shareholders $ 25,775,313 Fair value of assets acquired: Cash and cash equivalents $ 31,196,692 Loans receivable, net 128,756,348 Federal Home Loan Bank stock 569,800 Premises and equipment 1,507,309 Accrued interest and dividends receivable 468,900 Core deposit intangible 1,536,000 Bank owned life insurance 3,051,900 Deferred tax assets 393,195 Other assets 476,458 Total assets acquired 167,956,602 Fair value of liabilities assumed: Deposits 138,031,166 Federal Home Loan Bank advances 10,024,100 Other borrowings 3,250,000 Advance payments by borrowers for taxes and insurance 47,592 Other liabilities 382,053 Total liabilities assumed $ 151,734,911 Fair value of net assets acquired 16,221,691 Goodwill recognized for Resurgens $ 9,553,622 Goodwill of $9.6 million , which is the excess of merger consideration over the estimated fair value of net assets acquired, was recorded and is the result of expected operational synergies and other factors. This goodwill is not expected to be deductible for tax purposes. No loans were recognized as credit impaired in the acquisition. The Company recorded no merger expenses related to the Resurgens acquisition during the three months ended June 30, 2018, and $927,000 of such expenses during the nine months ended June 30, 2018 , and $131 for the three and nine months ended June 30, 2017. The Company recorded a total of $1.9 million of such expenses during the year ended September 30, 2017 . Full conversion of the acquisition was completed in mid-February of 2018, and no further costs related to the Resurgens acquisition are expected. The Company also assumed a $3.3 million borrowing that was paid off immediately following closing of the acquisition. Acquisition of CBS Financial Corporation On April 15, 2016 , the Company completed its acquisition of CBS Financial Corporation (“CBS”) and its wholly-owned subsidiary, Community Bank of the South, for cash consideration of $55.9 million . In addition to the cash paid by Charter Financial, CBS paid approximately $2.9 million in Stock Appreciation Rights and Stock Options payouts to its holders for a total transaction value of $58.8 million . Upon completion of the acquisition, CBS merged into Charter Financial, and Community Bank of the South merged into CharterBank. The acquisition expanded the bank's presence in the Atlanta market with four branches in Cobb County. The Company acquired $300.8 million of net loans receivable, and assumed $333.7 million of deposits. Goodwill of $25.5 million , which is the excess of the merger consideration over the estimated fair value of net assets acquired, was recorded in the CBS acquisition and is the result of expected operational synergies and other factors. A portion of this goodwill is expected to be deductible for tax purposes. No loans were recognized as credit impaired in the acquisition.

Investment Securities

Investment Securities	9 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Investment securities available for sale are summarized as follows: June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 1,569,292 $ — $ (12,479 ) $ 1,556,813 Collateralized loan obligations 43,803,295 41,725 (120,258 ) 43,724,762 Mortgage-backed securities: FHLMC certificates 18,171,186 — (442,800 ) 17,728,386 FNMA certificates 94,749,446 25,971 (3,926,177 ) 90,849,240 GNMA certificates 1,026,048 — (37,304 ) 988,744 Private-label mortgage securities: (1) Investment grade 371,308 1,016 — 372,324 Split rating (2) 1,559,834 — (73,150 ) 1,486,684 Non-investment grade 537,422 — (11,970 ) 525,452 Total $ 161,787,831 $ 68,712 $ (4,624,138 ) $ 157,232,405 ________________________________ (1) Credit ratings are current as of June 30, 2018 . (2) Bonds with split ratings represent securities with both investment and non-investment grades. September 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 2,238,758 $ 13,177 $ (120 ) $ 2,251,815 Collateralized loan obligations 40,629,368 92,000 (43,692 ) 40,677,676 Mortgage-backed securities: FHLMC certificates 21,657,987 220,228 (123,093 ) 21,755,122 FNMA certificates 114,740,214 177,495 (1,926,890 ) 112,990,819 GNMA certificates 2,504,334 2,645 (916 ) 2,506,063 Private-label mortgage securities: Investment grade 614,679 — (23,236 ) 591,443 Split rating (1) 2,337,239 — (87,569 ) 2,249,670 Non-investment grade 790,956 — (23,743 ) 767,213 Total $ 185,513,535 $ 505,545 $ (2,229,259 ) $ 183,789,821 ______________________________ (1) Bonds with split ratings represent securities with both investment and non-investment grades. The amortized cost and estimated fair value of investment securities available for sale as of June 30, 2018 , by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Cost Estimated Fair Value Due within one year $ 500,751 $ 500,595 Due from one year to five years 1,068,541 1,056,218 Due after five years 43,803,295 43,724,762 Mortgage-backed securities 116,415,244 111,950,830 Total $ 161,787,831 $ 157,232,405 During the nine months ended June 30, 2018 and 2017, $12.3 million and $19.2 million in investment securities available for sale were called or matured, respectively. Proceeds from sales of investment securities available for sale were $13,336 and $2.1 million during the nine months ended June 30, 2018 and 2017 . Gross realized gains on the sale of these securities were $1,074 for the nine months ended June 30, 2018 , and $247,780 for the same period in 2017 . No gross realized losses were recognized for the nine months ended June 30, 2018 or 2017. Investment securities available for sale with an aggregate carrying value of $37.7 million and $89.6 million at June 30, 2018 and September 30, 2017 , respectively, were available to be pledged to secure Federal Home Loan Bank (“FHLB”) advances. However, no securities were pledged at either period end to secure FHLB advances. Investment securities available for sale that had been in a continuous unrealized loss position for less than 12 months at June 30, 2018 and September 30, 2017 are as follows: June 30, 2018 Amortized Cost Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 1,569,292 $ (12,479 ) $ 1,556,813 Collateralized loan obligations 27,994,494 (120,259 ) 27,874,235 Mortgage-backed securities: FHLMC certificates 9,123,630 (65,326 ) 9,058,304 FNMA certificates 19,911,981 (701,169 ) 19,210,812 GNMA certificates 1,026,049 (37,304 ) 988,745 Total $ 59,625,446 $ (936,537 ) $ 58,688,909 September 30, 2017 Amortized Cost Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 556,675 $ (120 ) $ 556,555 Collateralized loan obligations 9,173,224 (43,692 ) 9,129,532 Mortgage-backed securities: FHLMC certificates 10,721,484 (123,093 ) 10,598,391 FNMA certificates 46,902,868 (270,060 ) 46,632,808 GNMA certificates 1,042,769 (916 ) 1,041,853 Private-label mortgage securities 107,879 (211 ) 107,668 Total $ 68,504,899 $ (438,092 ) $ 68,066,807 Investment securities available for sale that had been in a continuous unrealized loss position for greater than 12 months at June 30, 2018 and September 30, 2017 are as follows: June 30, 2018 Amortized Cost Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: FHLMC certificates $ 9,047,555 $ (377,474 ) $ 8,670,081 FNMA certificates 70,810,929 (3,225,008 ) 67,585,921 Private-label mortgage securities 2,097,256 (85,120 ) 2,012,136 Total $ 81,955,740 $ (3,687,602 ) $ 78,268,138 September 30, 2017 Amortized Cost Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: FNMA certificates $ 59,666,482 $ (1,656,829 ) $ 58,009,653 Private-label mortgage securities 3,634,997 (134,338 ) 3,500,659 Total $ 63,301,479 $ (1,791,167 ) $ 61,510,312 At June 30, 2018 the Company had approximately $85,000 of gross unrealized losses on private-label mortgage securities with aggregate amortized cost of approximately $2.1 million . As of June 30, 2018 , the Company has no other-than-temporary impairment losses in its portfolio of investment securities available for sale. Regularly, the Company performs an assessment to determine whether there have been any events or economic circumstances to indicate that a security on which there is an unrealized loss is impaired other-than-temporarily. The assessment considers many factors including the severity and duration of the impairment, the Company’s intent and ability to hold the security for a period of time sufficient for recovery in value, recent events specific to the industry, and current characteristics of each security such as delinquency and foreclosure levels, credit enhancements, and projected losses and loss coverage ratios. It is possible that the underlying collateral of these securities will perform worse than current expectations, which may lead to adverse changes in cash flows on these securities and potential future other-than-temporary impairment losses. Events that may trigger material declines in fair values for these securities in the future include but are not limited to, deterioration of credit metrics, significantly higher levels of default and severity of loss on the underlying collateral, deteriorating credit enhancement and loss coverage ratios, or further illiquidity. All of these securities were evaluated for other-than-temporary impairment based on an analysis of the factors and characteristics of each security as previously enumerated. The Company considers these unrealized losses to be temporary impairment losses primarily because of continued sufficient levels of credit enhancements and credit coverage levels of less senior tranches to tranches held by the Company.

Loans Receivable

Loans Receivable	9 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loans Receivable	Loans Receivable Loans outstanding, by portfolio segment, are summarized in the following table: June 30, 2018 September 30, 2017 1-4 family residential real estate $ 246,591,057 $ 232,040,341 Commercial real estate 676,399,345 697,070,779 Commercial 102,936,278 103,673,447 Real estate construction 101,570,279 88,791,799 Consumer and other 36,809,844 39,943,386 Total loans, net of acquisition fair value adjustments 1,164,306,803 1,161,519,752 Unamortized loan origination fees, net (1,284,342 ) (1,165,148 ) Allowance for loan losses (11,496,661 ) (11,078,422 ) Total loans, net $ 1,151,525,800 $ 1,149,276,182 Loan Origination and Risk Management. The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions. Commercial real estate loans are generally made by the Company to entities in Georgia, Alabama, Florida and adjoining states and are secured by properties in these states. Commercial real estate lending involves different risks compared to one- to four-family residential lending. Repayment of commercial real estate loans often depends on the successful operations and income stream of the borrowers, and commercial real estate loans typically involve larger loan balances to single borrowers or groups of related borrowers compared to residential real estate loans. The Company’s underwriting criteria for commercial real estate loans include maximum loan-to-value ratios, debt coverage ratios, secondary sources of repayment, guarantor requirements, net worth requirements and quality of cash flow. As part of the loan approval and underwriting of commercial real estate loans, management undertakes a cash flow analysis, and generally requires a debt-service coverage ratio of at least 1.15 times. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. At June 30, 2018 , approximately 32.1% of the outstanding principal balance of the Company’s commercial real estate loans was secured by owner-occupied properties. The Company makes construction and land development loans primarily for the construction of one- to four-family residences but also for multi-family and nonresidential real estate projects on a select basis. The Company offers construction loans to builders including both speculative (unsold) and pre-sold loans to pre-approved local builders. The number of speculative loans that management will extend to a builder at one time depends upon the financial strength and credit history of the builder. The Company’s construction loan program is expected to remain a modest portion of the loan volume, and management generally limits the number of outstanding loans on unsold homes under construction within a specific area. The Company also originates first and second mortgage loans and home equity lines of credit secured by one- to four-family residential properties within Georgia, Alabama and the Florida panhandle. Management currently originates mortgages at all branch locations, but utilizes a centralized underwriting location to reduce risk. The Company originates both fixed rate and adjustable rate one- to four-family residential mortgage loans. Fixed rate 30-year conforming loans are generally originated for sale into the primary or secondary markets and loans that are non-conforming due to property exceptions and that have adjustable rates are generally retained in the Company’s portfolio. The non-conforming loans originated are not considered to be subprime loans and the amount of subprime and low documentation loans held by the Company is not material. The Company also offers home equity lines of credit as a complement to one- to four-family residential mortgage lending. The underwriting standards applicable to home equity credit lines are similar to those for one- to four-family residential mortgage loans, except for slightly more stringent credit-to-income and credit score requirements. Home equity loans are generally limited to 90% of the value of the underlying property unless the loan is covered by private mortgage insurance. At June 30, 2018 , the Company had $44.8 million of home equity lines of credit and second mortgage loans. The Company originates consumer loans that consist of loans on deposits, auto loans, purchased mobile home loans, and various other installment loans. The Company primarily offers consumer loans as an accommodation to customers. Consumer loans tend to have a higher credit risk than residential mortgage loans because they may be secured by rapidly depreciable assets, or may be unsecured. The Company’s consumer lending generally follows accepted industry standards for non-subprime lending, including credit scores and debt to income ratios. The Company’s commercial business loans are generally limited to terms of ten years or less. While management typically collateralizes these loans with a lien on commercial real estate or, much less frequently, with a lien on business assets and equipment, the primary underwriting consideration is the business cash flow. Management also generally requires the personal guarantee of the business owner. Interest rates on commercial business loans are generally higher than interest rates on residential or commercial real estate loans due to the risk inherent in this type of loan. Commercial business loans are generally considered to have more risk than residential mortgage loans or commercial real estate loans because the collateral may be in the form of intangible assets and/or readily depreciable inventory. Commercial business loans may also involve relatively large loan balances to single borrowers or groups of related borrowers, with the repayment of such loans typically dependent on the successful operation and income stream of the borrower. Such risks can be significantly affected by economic conditions. In addition, commercial business lending generally requires substantially greater supervision efforts by management compared to residential mortgage or commercial real estate lending. The Company also has a portfolio of Small Business Administration (“SBA”) loans, which are generally related to commercial lending. Each loan has either a portion guaranteed by the SBA or other credit enhancements provided by the government. The Company maintains an internal loan review function that reviews and validates the credit risk program on a periodic basis. Results of these reviews are presented to management. The loan review process complements and reinforces the risk identification and assessment decisions made by lenders and credit personnel, as well as the Company’s policies and procedures. Nonaccrual and Past Due Loans. An aging analysis of past due loans, segregated by portfolio segment, at June 30, 2018 and September 30, 2017 was as follows: June 30, 2018 September 30, 2017 Current $ 1,157,740,999 $ 1,155,094,965 Accruing past due loans: 30-89 days past due 1-4 family residential real estate 2,476,122 1,567,688 Commercial real estate 1,265,449 1,490,424 Commercial 113,257 1,000,840 Real estate construction 324,924 — Consumer and other 777,656 659,174 Total 30-89 days past due 4,957,408 4,718,126 90 days or greater past due (1) 1-4 family residential real estate 154,659 46,223 Commercial real estate — — Commercial — — Real estate construction — — Consumer and other 86,983 — Total 90 days or greater past due 241,642 46,223 Total accruing past due loans 5,199,050 4,764,349 Nonaccruing loans: (2) 1-4 family residential real estate 348,150 293,224 Commercial real estate 771,901 1,327,037 Commercial 224,157 40,177 Real estate construction — — Consumer and other 22,546 — Nonaccruing loans 1,366,754 1,660,438 Total loans $ 1,164,306,803 $ 1,161,519,752 ________________________________ (1) No acquired loans are regarded as accruing loans and included in this section at June 30, 2018 or September 30, 2017 . These loans which are accounted for under ASC 310-30 are reported as accruing loans because of the ongoing recognition of accretion income established at the time of acquisition. (2) Acquired loans in the amount of $0 and $888,000 at June 30, 2018 and September 30, 2017 , respectively, are regarded as accruing loans and excluded from the nonaccrual section due to the ongoing recognition of accretion income established at the time of acquisition. Impaired Loans. The Company evaluates “impaired” loans, which include nonperforming loans and accruing troubled debt restructured loans having risk characteristics that are unique to an individual borrower, on a loan-by-loan basis with balances above a specified level. For smaller loans, the allowance is calculated based on the credit grade utilizing historical loss experience and other qualitative factors. Impaired loans for the periods ended June 30, 2018 and September 30, 2017 , segregated by portfolio segment, are presented below. There were $1,251,449 and $48,733 of recorded allowances for loan losses on impaired loans at June 30, 2018 and September 30, 2017 , respectively. Three Months Ended Nine Months Ended Recorded Investment Unpaid Principal Balance Related Allowance Average Investment in Impaired Loans Interest Income Recognized Average Investment in Impaired Loans Interest Income Recognized 1-4 family residential real estate (1) $ 1,051,428 $ 1,208,242 $ 8,020 $ 1,056,993 $ 8,254 $ 1,114,914 $ 42,079 Commercial real estate (2) 8,558,786 9,774,957 1,199,353 8,614,619 97,047 8,878,239 299,275 Commercial 224,157 48,343 — 228,730 — 226,492 2,386 Real estate construction — — — — — — — Consumer and other (3) 135,920 138,799 44,076 137,053 2,407 138,976 7,297 Total impaired loans $ 9,970,291 $ 11,170,341 $ 1,251,449 $ 10,037,395 $ 107,708 $ 10,358,621 $ 351,037 ________________________________ (1) 1-4 family residential real estate loans with related allowances totaling $8,020 had a recorded investment of $29,999 and unpaid principal balance of $33,905 at June 30, 2018 . During the three and nine months ended June 30, 2018 , the Company had an average investment in such loans of $30,360 and $31,050 , respectively, and recorded no interest income on the loans. (2) Commercial real estate loans with related allowances totaling $1,199,353 had a recorded investment of $4,487,205 and unpaid principal balance of $4,807,777 at June 30, 2018 . During the three and nine months ended June 30, 2018 , the Company had an average investment in such loans of $4,508,128 and $4,710,529 , respectively, and recorded $50,716 and $158,980 of interest income, respectively, on the loans. (3) Consumer and other loans with related allowances totaling $44,076 had a recorded investment of $48,937 and unpaid principal balance of $51,817 at June 30, 2018 . During the three and nine months ended June 30, 2018 , the Company had an average investment in such loans of $49,969 and $51,360 , respectively, and recorded $437 and $1,349 of interest income, respectively, on the loans. The recorded investment in accruing troubled debt restructured loans (“TDRs”) at June 30, 2018 totaled $3.9 million and is included in the impaired loan table above. Year Ended Recorded Investment Unpaid Principal Balance Related Allowance Average Investment in Impaired Loans Interest Income Recognized 1-4 family residential real estate (1) $ 955,522 $ 1,143,831 $ 24,434 $ 975,317 $ 33,166 Commercial real estate (2) 5,960,208 6,970,943 24,299 6,131,422 259,651 Commercial 140,012 363,382 — 161,068 — Real estate construction — — — — — Consumer and Other 28,806 30,125 — 30,394 1,976 Total impaired loans $ 7,084,548 $ 8,508,281 $ 48,733 $ 7,298,201 $ 294,793 ________________________________ (1) 1-4 family residential real estate loans with related allowances totaling $24,434 had a recorded investment of $24,434 and unpaid principal balance of $25,131 at September 30, 2017 . During the year ended September 30, 2017 , the Company had an average investment in such loans of $24,858 and recorded $90 of interest income on the loans. (2) Commercial real estate loans with related allowances totaling $24,299 had a recorded investment of $686,520 and unpaid principal balance of $695,762 at September 30, 2017 . During the year ended September 30, 2017 , the Company had an average investment in such loans of $717,892 and recorded $39,825 of interest income on the loans. The recorded investment in accruing TDRs at September 30, 2017 totaled $5.0 million and is included in the impaired loan table above. Loans are classified as restructured by the Company when certain modifications are made to the loan terms and concessions are granted to the borrowers due to financial difficulty experienced by those borrowers. The Company only restructures loans for borrowers in financial difficulty that have presented a viable business plan to fully pay off all obligations, including outstanding debt, interest, and fees, either by generating additional income from the business or through liquidation of assets. Generally, these loans are restructured to provide the borrower additional time to execute upon their plans. The concessions granted on TDRs generally include terms to reduce the interest rate or extend the term of the debt obligation. Loans on nonaccrual status at the date of modification are initially classified as nonaccrual TDRs. Loans on accruing status at the date of concession are initially classified as accruing TDRs if the loan is reasonably assured of repayment and performance is expected in accordance with its modified terms. Such loans may be designated as nonaccrual loans subsequent to the concession date if reasonable doubt exists as to the collection of interest or principal under the restructuring agreement. TDRs are returned to accruing status when there is economic substance to the restructuring, there is documented credit evaluation of the borrower’s financial condition, the remaining balance is reasonably assured of repayment in accordance with its modified terms, and the borrower has demonstrated sustained repayment performance in accordance with the modified terms for a reasonable period of time (generally a minimum of six months ). For the nine month periods ended June 30, 2018 and 2017 , the following table presents a breakdown of the types of concessions determined to be TDRs during the period by loan class. Accruing Loans Nonaccrual Loans Nine Months Ended June 30, 2018 Nine Months Ended June 30, 2018 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Payment structure modification: 1-4 family residential real estate 4 $ 195,854 $ 195,854 — $ — $ — Commercial real estate 1 94,337 94,337 2 186,813 186,813 Commercial — — — 2 199,467 199,467 Total 5 $ 290,191 $ 290,191 4 $ 386,280 $ 386,280 Accruing Loans Nonaccrual Loans Nine Months Ended June 30, 2017 Nine Months Ended June 30, 2017 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Payment structure modification: 1-4 family residential real estate 7 $ 441,756 $ 441,756 — $ — $ — Commercial real estate 2 515,639 515,639 — — — Consumer and other — — — 1 32,138 32,138 Total 9 $ 957,395 $ 957,395 1 $ 32,138 $ 32,138 At June 30, 2018 , restructured loans with a modified balance of $3.9 million were accruing and $373,576 were nonaccruing, while restructured loans with a modified balance of $5.0 million were accruing and $106,739 were nonaccruing at June 30, 2017 . There were no loans that were restructured within the past twelve months and subsequently defaulted at June 30, 2018 or June 30, 2017 . Acquired Impaired Loans . The following table documents changes in the accretable discount on acquired credit impaired loans during the nine months ended June 30, 2018 and 2017 : Nine Months Ended June 30, 2018 Nine Months Ended June 30, 2017 Balance, beginning of period $ — $ 462,071 Loan accretion — (397,685 ) Balance, end of period $ — $ 64,386 The following table presents the outstanding balances and related carrying amounts for all purchase credit impaired loans at the periods ended June 30, 2018 and September 30, 2017 : June 30, 2018 September 30, 2017 Unpaid principal balance $ 16,911,270 $ 18,327,905 Carrying amount 15,819,914 16,974,607 Acquired Performing Loans . Included within total loans are acquired performing loans shown net of fair value discounts in the amount of $260.0 million and $333.5 million at June 30, 2018 and September 30, 2017 , respectively. These fair value discounts are being amortized over the remaining lives of the respective loans and totaled $2.3 million and $4.1 million at June 30, 2018 and September 30, 2017 , respectively. Credit Quality Indicators . As part of the ongoing monitoring of the credit quality of the Company’s loan portfolio, management tracks certain credit quality indicators including the level of classified loans, net charge-offs, nonperforming loans (see details above) and the general economic conditions in its market areas. The Company utilizes a risk rating system to assign a risk grade to each of its loans. Loans are graded on a scale of 1 to 8. The risk grade for each individual loan is determined by the loan officer and other approving officers at the time of loan origination and is adjusted from time to time to reflect an ongoing assessment of loan risk. Risk grades are reviewed quarterly for all substandard, nonaccrual and TDR loans, and annually as part of the Company's internal loan review process. In addition, individual loan risk grades are reviewed in connection with all renewals, extensions and modifications. The following table presents the risk grades of the loan portfolio, segregated by class of loans: June 30, 2018 1-4 family residential real estate Commercial real estate Commercial Real estate construction Consumer and other Total Pass (1-4) $ 243,081,293 $ 644,337,423 $ 101,393,896 $ 101,570,279 $ 36,760,496 $ 1,127,143,387 Special Mention (5) 788,521 13,380,351 1,088,534 — — 15,257,406 Substandard (6) 2,721,243 18,681,571 453,848 — 49,348 21,906,010 Doubtful (7) — — — — — — Loss (8) — — — — — — Total loans $ 246,591,057 $ 676,399,345 $ 102,936,278 $ 101,570,279 $ 36,809,844 $ 1,164,306,803 September 30, 2017 1-4 family residential real estate Commercial real estate Commercial Real estate construction Consumer and other Total Pass (1-4) $ 230,417,503 $ 654,217,207 $ 102,690,306 $ 88,551,410 $ 39,914,580 $ 1,115,791,006 Special Mention (5) — 14,318,249 494,241 240,389 — 15,052,879 Substandard (6) 1,622,838 28,535,323 488,900 — 28,806 30,675,867 Doubtful (7) — — — — — — Loss (8) — — — — — — Total loans $ 232,040,341 $ 697,070,779 $ 103,673,447 $ 88,791,799 $ 39,943,386 $ 1,161,519,752 Allowance for Loan Losses . The allowance for loan losses is established through a provision for loan losses charged to expense and is an amount that management believes will be adequate to absorb losses on existing loans that become uncollectible, based on evaluations of the collectability of loans. The evaluations take into consideration such factors as changes in the nature and volume of the loan portfolio, historical loss rates, overall portfolio quality, review of specific problem loans, and current economic conditions and trends that may affect a borrower’s ability to repay. Loans are charged against the allowance for loan losses when management believes that the collectability of the principal is unlikely. Subsequent recoveries are added to the allowance. Management’s allowance for loan losses methodology is a loan classification-based system. Management bases the required reserve on a percentage of the loan balance for each type of loan and classification level. Loans may be classified manually and are automatically classified if they are not previously classified when they reach certain levels of delinquency. Unclassified loans are reserved at different percentages based on the loan loss history of the last seven years . Reserve percentages are also adjusted based upon our estimate of the effect that the current economic environment will have on each type of loan. Management segments its allowance for loan losses into the following four major categories: (1) specific reserves; (2) general allowances for Classified/Watch loans; (3) general allowances for loans with satisfactory ratings; and (4) an unallocated amount. Risk ratings are initially assigned in accordance with CharterBank’s loan and collection policy. An organizationally independent department reviews risk grade assignments on an ongoing basis. Management reviews current information and events regarding a borrowers’ financial condition and strengths, cash flows available for debt repayment, the related collateral supporting the loan and the effects of known and expected economic conditions. When the evaluation reflects a greater than normal risk associated with the individual loan, management classifies the loan accordingly. If the loan is determined to be impaired, management allocates a portion of the allowance for loan losses for that loan based on the fair value of the collateral, if the loan is considered collateral-dependent, as the measure for the amount of the impairment. Impaired and Classified/Watch loans are aggressively monitored. The allowances for loans by credit grade are further subdivided by loan type. Charter Financial has developed specific quantitative allowance factors to apply to each loan which considers loan charge-off experience over the most recent seven years by loan type. In addition, loss estimates are applied for certain qualitative allowance factors that are subjective in nature and require considerable judgment on the part of management. Such qualitative factors include economic and business conditions, the volume of past due loans, changes in the value of collateral of collateral-dependent loans, and other economic uncertainties. An unallocated component of the allowance is also established for potential losses that exist in the remainder of the portfolio, but have yet to be identified. The Company incorporates certain refinements and improvements to its allowance for loan losses methodology from time to time. During the current quarter and the prior fiscal year, the Company made minor refinements to the qualitative risk factors but no significant changes to its allowance methodology. The adjustments in the Company's methodology were not material to the overall allowance or provision for the three and nine months ended June 30, 2018 or for the fiscal year ended September 30, 2017 . An unallocated allowance is generally maintained in a range of 4% to 12% of the total allowance in recognition of the imprecision of the estimates and other factors. In times of greater economic downturn and uncertainty, the higher end of this range is provided. The Company recorded net recoveries of $768,239 during the nine months ended June 30, 2018 . With asset quality remaining strong, and the continued trend of net recoveries, the Company recorded negative provision for loan losses of $350,000 and $900,000 during the nine months ended June 30, 2018 and 2017 . No provision for loan losses was recorded for the three months ended June 30, 2018 or 2017 . A negative provision of $900,000 was recorded during the fiscal year ended September 30, 2017 . The following tables present an analysis of the allowance for loan losses by portfolio segment and changes in the allowance for loan losses for the three and nine months ended June 30, 2018 and 2017 . The total allowance for loan losses is disaggregated into those amounts associated with loans individually evaluated and those associated with loans collectively evaluated, as well as loans acquired with deteriorated credit quality. Three Months Ended June 30, 2018 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 777,284 $ 7,612,059 $ 864,346 $ 549,349 $ 187,326 $ 1,120,539 $ 11,110,903 Charge-offs (23,928 ) — — — (3,969 ) — (27,897 ) Recoveries 17,532 186,104 114,973 — 95,046 — 413,655 Provision (69,026 ) 340,210 (332,132 ) 105,444 (75,083 ) 30,587 — Ending balance $ 701,862 $ 8,138,373 $ 647,187 $ 654,793 $ 203,320 $ 1,151,126 $ 11,496,661 Three Months Ended June 30, 2017 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 789,773 $ 7,294,255 $ 715,660 $ 403,180 $ 194,261 $ 1,107,409 $ 10,504,538 Charge-offs — (63,554 ) — — (9,886 ) — (73,440 ) Recoveries 4,785 162,795 197,488 — 4,091 — 369,159 Provision (58,133 ) 31,328 (92,485 ) 201 44,360 74,729 — Ending balance $ 736,425 $ 7,424,824 $ 820,663 $ 403,381 $ 232,826 $ 1,182,138 $ 10,800,257 Nine Months Ended June 30, 2018 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 663,061 $ 7,820,078 $ 776,551 $ 482,665 $ 196,037 $ 1,140,030 $ 11,078,422 Charge-offs (193,298 ) (194,204 ) (128,926 ) — (11,589 ) — (528,017 ) Recoveries 147,175 636,742 397,564 — 114,775 — 1,296,256 Provision 84,924 (124,243 ) (398,002 ) 172,128 (95,903 ) 11,096 (350,000 ) Ending balance $ 701,862 $ 8,138,373 $ 647,187 $ 654,793 $ 203,320 $ 1,151,126 $ 11,496,661 Nine Months Ended June 30, 2017 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 779,288 $ 7,346,130 $ 600,258 $ 516,556 $ 79,140 $ 1,050,044 $ 10,371,416 Charge-offs (92,136 ) (112,651 ) — — (21,690 ) — (226,477 ) Recoveries 142,205 917,220 468,657 — 27,236 — 1,555,318 Provision (92,932 ) (725,875 ) (248,252 ) (113,175 ) 148,140 132,094 (900,000 ) Ending balance $ 736,425 $ 7,424,824 $ 820,663 $ 403,381 $ 232,826 $ 1,182,138 $ 10,800,257 Balance at June 30, 2018 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 8,020 $ 1,199,353 $ — $ — $ 44,076 $ — $ 1,251,449 Other loans not individually evaluated 693,842 6,939,020 647,187 654,793 159,244 1,151,126 10,245,212 Ending balance $ 701,862 $ 8,138,373 $ 647,187 $ 654,793 $ 203,320 $ 1,151,126 $ 11,496,661 Loans: Amounts collectively evaluated for impairment $ 243,877,700 $ 656,852,264 $ 99,542,431 $ 101,570,279 $ 36,673,924 $ 1,138,516,598 Amounts individually evaluated for impairment 1,051,428 8,558,786 224,157 — 135,920 9,970,291 Amounts related to loans acquired with deteriorated credit quality 1,661,929 10,988,295 3,169,690 — — 15,819,914 Ending balance $ 246,591,057 $ 676,399,345 $ 102,936,278 $ 101,570,279 $ 36,809,844 $ 1,164,306,803 Balance at September 30, 2017 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 24,434 $ 24,299 $ — $ — $ — $ — $ 48,733 Other loans not individually evaluated 638,627 7,795,779 776,551 482,665 196,037 1,140,030 11,029,689 Ending balance $ 663,061 $ 7,820,078 $ 776,551 $ 482,665 $ 196,037 $ 1,140,030 $ 11,078,422 Loans: Amounts collectively evaluated for impairment $ 229,359,838 $ 679,367,829 $ 100,026,551 $ 88,791,799 $ 39,914,580 $ 1,137,460,597 Amounts individually evaluated for impairment 955,522 5,960,208 140,012 — 28,806 7,084,548 Amounts related to loans acquired with deteriorated credit quality 1,724,981 11,742,742 3,506,884 — — 16,974,607 Ending balance $ 232,040,341 $ 697,070,779 $ 103,673,447 $ 88,791,799 $ 39,943,386 $ 1,161,519,752 Included within the above loan amounts are acquired loans, both performing and purchased credit impaired, which are shown net of fair value discounts. The total acquired net loan amounts reflected in the above tables were $275.8 million and $350.5 million at June 30, 2018 and September 30, 2017 , respectively. The total remaining fair value discounts related to the acquired loans totaled $2.3 million and $4.1 million at June 30, 2018 and September 30, 2017 , respectively.

Income Per Share

Income Per Share	9 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Income Per Share	Income Per Share Basic net income per share for the three and nine months ended June 30, 2018 and 2017 was computed by dividing net income to common shareholders by the weighted average number of shares of common stock outstanding, which consists of issued shares less unallocated employee stock ownership plan (“ESOP”) shares and unvested restricted shares. Diluted net income per share for the three and nine months ended June 30, 2018 and 2017 was computed by dividing net income by weighted average shares outstanding plus potential common shares resulting from dilutive stock options and unvested restricted shares, determined using the treasury stock method. Three Months Ended Nine Months Ended 2018 2017 2018 2017 Numerator: Net income $ 4,646,113 $ 3,513,850 $ 14,292,625 $ 11,876,312 Denominator: Weighted average common shares outstanding 14,544,417 14,353,082 14,490,993 14,293,859 Common stock equivalents 868,738 903,541 772,535 903,541 Diluted shares 15,413,155 15,256,623 15,263,528 15,197,400 Net income per share: Basic $ 0.32 $ 0.24 $ 0.99 $ 0.83 Diluted $ 0.30 $ 0.23 $ 0.94 $ 0.78 For the three and nine months ended June 30, 2018 there were 741,919 and 652,475 shares, respectively, of dilutive stock options, while there were 696,095 dilutive stock options during the same periods in 2017 . Additionally, for the three and nine months ended June 30, 2018 , there were 126,819 and 120,060 shares, respectively, of dilutive unvested restricted stock, while there were 207,446 shares of dilutive unvested restricted stock for the same periods in 2017 . There were no shares which were subject to options issued with exercise prices in excess of the average market value per share during the period ended June 30, 2018 or 2017 .

Employee Benefits

Employee Benefits	9 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Benefits	Employee Benefits The Company has a 2002 stock option plan which allows for stock option awards of the Company’s common stock to eligible directors and key employees of the Company. The option price is determined by a committee of the board of directors at the time of the grant and may not be less than 100% of the market value of the common stock on the date of the grant. For options granted under the 2002 stock option plan, when granted, the options vest over periods of up to four or five years from grant date or upon death, disability, or qualified retirement. All options must be exercised within a 10 -year period from grant date. The Company may grant either incentive stock options, which qualify for special federal income tax treatment, or non-qualified stock options, which do not receive such tax treatment. The Company’s stockholders authorized 882,876 shares for the plan, of which 358,596 have been issued or retired upon the exercise of the option granted under the plan, 362,830 have been granted and are outstanding and no shares are available to be granted at June 30, 2018 within this plan. All share and share amounts related to employee benefits have been updated to reflect the completion of the second-step conversion on April 8, 2013 at a conversion ratio of 1.2471 . As of June 30, 2018 , 631,004 shares have vested under this plan. During the nine months ended June 30, 2018 , 12,221 options from this plan vested. In addition to the plan above, on December 19, 2013, the Company's stockholders approved the 2013 Equity Incentive Plan, which allows for stock option awards of the Company’s common stock to eligible directors and key employees of the Company. The option price is determined by a committee of the board of directors at the time of the grant and may not be less than 100% of the market value of the common stock on the date of the grant. When granted, the options vest from one year to five years from grant date or upon death or disability. All options must be exercised within a 10 -year period from the grant date. The Company may grant either incentive stock options, which qualify for special federal income tax treatment, or non-qualified stock options, which do not receive such tax treatment. The Company’s stockholders have authorized 1,428,943 shares for the plan, of which 92,486 were issued or retired upon the exercise of the option granted under the plan and 943,464 have been granted and are outstanding as of June 30, 2018 , with the remaining 393,263 shares available to be granted at June 30, 2018 . During the nine months ended June 30, 2018 , 197,935 options from this plan vested. As of June 30, 2018 , 793,540 shares have vested under this plan. The fair value of the 20,000 options granted during the nine months ended June 30, 2018 was estimated on the date of grant using the Black-Scholes-Merton model with the following assumptions: 20,000 Options Risk-free interest rate 1.90 % Dividend yield 1.76 % Expected life at date of grant (months) 96 months Volatility 18.87 % Weighted average grant-date fair value $ 2.38 The following table summarizes activity for shares under option and weighted average exercise price per share: Shares Weighted average exercise price/share Weighted average remaining life (years) Options outstanding – September 30, 2017 1,565,810 $ 10.14 5 Options exercised (258,840 ) 9.35 3 Options forfeited (20,676 ) 16.74 10 Options granted 20,000 17.02 10 Options outstanding – June 30, 2018 1,306,294 $ 10.30 4 Options exercisable – June 30, 2018 1,052,527 $ 10.09 4 The stock price at June 30, 2018 was greater than the exercise prices on all 1,306,294 options outstanding and therefore the outstanding options had an intrinsic value of $18,097,949 . The total intrinsic value of all 1,052,527 options exercisable at June 30, 2018 was $14,794,107 . Stock option expense was $240,655 and $248,337 for the nine months ended June 30, 2018 and 2017 , respectively. The following table summarizes information about the options outstanding at June 30, 2018 : Number of options outstanding at Remaining contractual life in years Exercise price per share 213,344 1 $ 8.82 105,996 2 $ 8.18 40,996 2 $ 7.22 2,494 4 $ 7.79 889,464 6 $ 10.89 30,000 7 $ 12.66 3,000 8 $ 13.16 18,000 8 $ 13.31 3,000 8 $ 13.30 1,306,294 In addition to the above, the Company implemented the Charter Financial Corporation 2013 Equity Incentive Plan as described above, which has 571,577 shares authorized, and the Company has granted 374,092 shares of restricted stock to key employees and directors, including 22,500 during the current year. During the nine months ended June 30, 2018 , 73,315 shares vested and 15,000 shares were canceled. The remaining 197,485 shares are available to be granted at June 30, 2018 . Shares Weighted average grant date fair Unvested restricted stock awards - September 30, 2017 150,547 $ 11.20 Granted 22,500 17.48 Vested 73,315 11.02 Canceled or expired 15,000 17.02 Unvested restricted stock awards – June 30, 2018 84,732 $ 11.99

Commitments and Contingent Liab

Commitments and Contingent Liabilities	9 Months Ended
	Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities In the normal course of business, the Company makes various commitments and incurs certain contingent liabilities, which are not reflected in the accompanying financial statements. The commitments and contingent liabilities include guarantees, commitments to extend credit, and standby letters of credit. At June 30, 2018 , commitments to extend credit and standby letters of credit totaled $249.4 million . The Company does not anticipate any material losses as a result of these transactions. In the normal course of business, the Company is party (both as plaintiff and defendant) to certain matters of litigation. In the opinion of management, none of these matters, with the possible exception of matters discussed below, should have a material adverse effect on the Company’s financial position or results of operation. Two putative class action complaints have been filed in the United States District Court for the District of Maryland against the Company and its directors alleging violations of securities laws and SEC rules in the filing of the Company's proxy statement/prospectus on July 18, 2018. Each complaint names the Company and all of the current members of the Company's board of directors as defendants, and one also names CenterState as a defendant. The complaints allege that the proxy statement/prospectus contains false and misleading statements and omits material information with respect to the proposed transaction. Additionally, the complaints assert claims against the Company's board of directors, as well as CenterState, for violations of Section 20(a) of the 1934 Act as controlling persons of the Company. Both lawsuits seek, among other things, to enjoin the closing of the Merger, as well as an award of costs and attorneys' fees. One lawsuit also seeks to enjoin the stockholder vote with respect to the Merger. The defendants believe these actions are without merit and intend to defend vigorously against the claims. See “Part II - Item 1 Legal Proceedings” for further information on the claims.

Fair Value of Financial Instrum

Fair Value of Financial Instruments and Fair Value Measurement	9 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments and Fair Value Measurement	Fair Value of Financial Instruments and Fair Value Measurement Accounting standards define fair value as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Accounting standards also establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The applicable standard describes three levels of inputs that may be used to measure fair value: 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, and 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 evaluates fair value measurement inputs on an ongoing basis in order to determine if there is a change of sufficient significance to warrant a transfer between levels. For example, changes in market activity or the addition of new unobservable inputs could, in the Company’s judgment, cause a transfer to either a higher or lower level. For the three and nine months ended June 30, 2018 , there were no transfers between levels. All of the Company’s available for sale securities fall into Level 2 of the fair value hierarchy. These securities are priced via independent service providers. In obtaining such valuation information, the Company has evaluated the valuation methodologies used to develop the fair values. At June 30, 2018 , the Company holds, as part of its investment portfolio, available for sale securities reported at fair value consisting of state and municipal securities, collateralized loan obligations (“CLO”), mortgage-backed securities and collateralized mortgage obligations. The fair value of the majority of these securities is determined using widely accepted valuation techniques including matrix pricing and broker-quote based applications. Inputs include benchmark yields, reported trades, issuer spreads, prepayment speeds and other relevant items. These are inputs used by a third-party pricing service used by the Company. To validate the appropriateness of the valuations provided by the third party, the Company regularly updates its understanding of the inputs used and compares valuations to an additional third party source. The Company also holds assets available for sale reported at fair value and included in other assets on the Company's balance sheet, consisting of one former branch and a parcel of land adjacent to a current branch. These assets are included in other assets on the Company's condensed consolidated statements of financial condition. The fair value of these assets is determined using current appraisals adjusted at management’s discretion to reflect any decline in the fair value of the properties since the time the appraisal was performed. Appraisal values are reviewed and monitored internally and fair value is reassessed at least quarterly or more frequently when circumstances occur that indicate a change in fair value. All of the Company’s assets held for sale fall into level 3 of the fair value hierarchy. Assets and Liabilities Measured on a Recurring Basis: Assets and liabilities measured at fair value on a recurring basis are summarized below. June 30, 2018 Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Investment securities available for sale: State and municipal securities $ 1,556,813 $ — $ 1,556,813 $ — Collateralized loan obligations 43,724,762 — 43,724,762 — Mortgage-backed securities: FHLMC certificates 17,728,386 — 17,728,386 — FNMA certificates 90,849,240 — 90,849,240 — GNMA certificates 988,744 — 988,744 — Private-label mortgage securities: Investment grade 372,324 — 372,324 — Split rating (1) 1,486,684 — 1,486,684 — Non-investment grade 525,452 — 525,452 — Total investment securities available for sale 157,232,405 — 157,232,405 — Mortgage servicing rights 1,547,380 — 1,547,380 — Assets held for sale 112,300 — — 112,300 Total recurring assets at fair value $ 158,892,085 $ — $ 158,779,785 $ 112,300 __________________________________ (1) Bonds with split ratings represent securities with both investment and non-investment grades. September 30, 2017 Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Investment securities available for sale: State and municipal securities $ 2,251,815 $ — $ 2,251,815 $ — Collateralized loan obligations 40,677,676 — 40,677,676 — Mortgage–backed securities: FHLMC certificates 21,755,122 — 21,755,122 — FNMA certificates 112,990,819 — 112,990,819 — GNMA certificates 2,506,063 — 2,506,063 — Private-label mortgage securities: Investment grade 591,443 — 591,443 — Split rating (1) 2,249,670 — 2,249,670 — Non-investment grade 767,213 — 767,213 — Total investment securities available for sale 183,789,821 — 183,789,821 — Mortgage servicing rights 1,319,725 — 1,319,725 — Assets held for sale 752,300 — — 752,300 Total recurring assets at fair value $ 185,861,846 $ — $ 185,109,546 $ 752,300 __________________________________ (1) Bonds with split ratings represent securities with both investment and non-investment grades. When a determination is made to classify a financial instrument within Level 3 of the valuation hierarchy, the determination is based upon the significance of the unobservable factors to the overall fair value measurement. However, since Level 3 financial instruments typically include, in addition to the unobservable or Level 3 components, observable components (that is, components that are actively quoted and can be validated to external sources), the losses below include changes in fair value due in part to observable factors that are part of the valuation methodology. A reconciliation of the beginning and ending balances of Level 3 assets and liabilities recorded at fair value on a recurring basis is as follows: Nine Months Ended June 30, 2018 Nine Months Ended June 30, 2017 Fair value, beginning balance $ 752,300 $ 975,300 Sales (640,000 ) (263,000 ) Valuation loss recognized in noninterest expense — — Fair value, ending balance $ 112,300 $ 712,300 Assets and Liabilities Measured on a Nonrecurring Basis: Assets and liabilities measured at fair value on a nonrecurring basis are summarized below. Fair Value Measurements Using: Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs June 30, 2018 Impaired loans $ 1,538,957 $ — $ — $ 1,538,957 Other real estate owned 227,531 — — 227,531 September 30, 2017 Impaired loans $ 2,326,132 $ — $ — $ 2,326,132 Other real estate owned 1,437,345 — — 1,437,345 Loans considered impaired are loans for which, based on current information and events, it is probable that the creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impaired loans are subject to nonrecurring fair value adjustments to reflect write-downs that are based on the market price or current appraised value of the collateral, adjusted to reflect local market conditions or other economic factors. After evaluating the underlying collateral, the fair value of the impaired loans is determined by allocating specific reserves from the allowance for loan and lease losses to the loans. Thus, the fair value reflects the loan balance as adjusted by partial chargedowns less the specifically allocated reserve. Certain collateral-dependent impaired loans are reported at the fair value of the underlying collateral. Impairment is measured based on the fair value of the collateral, which is typically derived from appraisals that take into consideration prices in observed transactions involving similar assets and similar locations. Each appraisal is updated on an annual basis, either through a new appraisal or through the Company’s comprehensive internal review process. Appraised values are reviewed and monitored internally and fair value is re-assessed at least quarterly or more frequently when circumstances occur that indicate a change in fair value. The fair value of impaired loans that are not collateral dependent is measured using a discounted cash flow analysis considered to be a Level 3 input. OREO is initially accounted for at fair value, less estimated costs to dispose of the property. Any excess of the recorded investment over fair value, less costs to dispose, is charged to the allowance for loan and lease losses at the time of foreclosure. A provision is charged to earnings for subsequent losses on OREO when market conditions indicate such losses have occurred. The ability of the Company to recover the carrying value of OREO is based upon future sales of the real estate. The ability to effect such sales is subject to market conditions and other factors beyond the Company's control, and future declines in the value of the real estate would result in a charge to earnings. The recognition of sales and gain on sales is dependent upon whether the nature and terms of the sales, including possible future involvement of the Company, if any, meet certain defined requirements. If those requirements are not met, sale and gain recognition is deferred. OREO represents real property taken by the Company either through foreclosure or through a deed in lieu thereof from the borrower. The fair value of OREO is based on property appraisals adjusted at management’s discretion to reflect a further decline in the fair value of properties since the time the appraisal analysis was performed. It has been the Company’s experience that appraisals may become outdated due to the volatile real-estate environment. Appraised values are reviewed and monitored internally and fair value is re-assessed at least quarterly or more frequently when circumstances occur that indicate a change in fair value. Therefore, the inputs used to determine the fair value of OREO and repossessed assets fall within Level 3. The Company may include within OREO other repossessed assets received as partial satisfaction of a loan. These assets are not material and do not typically have readily determinable market values and are considered Level 3 inputs. The following table provides information describing the valuation processes used to determine recurring and nonrecurring fair value measurements categorized within Level 3 of the fair value hierarchy at June 30, 2018 : Quantitative Information about Level 3 Fair Value Measurements Fair Value Valuation Technique Unobservable Input General Range (Discount) Weighted Average Discount Impaired Loans $ 1,538,957 Property appraisals Management discount for property type and recent market volatility 23% — 66% 32% OREO $ 227,531 Property appraisals Management discount for property type and recent market volatility 9% — 20% 11% Assets Held for Sale $ 112,300 Valuation analysis Management discount for property type and recent market volatility 0% — 53% 30% Included in the Company's portfolio of other real estate owned is approximately $228,000 and $224,000 of foreclosed residential real estate property at June 30, 2018 and September 30, 2017 , respectively. The Company had no consumer mortgage loans collateralized by residential real estate in the process of foreclosure at June 30, 2018 , while $195,000 in consumer mortgage loans collateralized by residential real estate were in the process of foreclosure at September 30, 2017 . Accounting standards require disclosures of fair value information about financial instruments, whether or not recognized in the Statement of Condition, for which it is practicable to estimate that value. In cases where quoted market prices are not available, fair value is based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. Also, the fair value estimates presented herein are based on pertinent information available to management as of June 30, 2018 and September 30, 2017 . The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments: CASH AND CASH EQUIVALENTS – The carrying amount approximates fair value because of the short maturity of these instruments. CERTIFICATES OF DEPOSIT HELD AT OTHER FINANCIAL INSTITUTIONS – The fair value of certificates of deposit held at other financial institutions is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. INVESTMENTS AVAILABLE FOR SALE, FHLB STOCK, AND RESTRICTED SECURITIES – The fair value of investment and mortgage-backed securities and collateralized mortgage obligations available for sale is estimated based on bid quotations received from securities dealers. The FHLB stock and restricted securities are considered restricted stock and are carried at cost which approximates their fair value. LOANS RECEIVABLE – Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type. The fair value of performing loans is calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit risk inherent in the loan. The estimate of maturity is based on the Company’s historical experience with repayments for each loan classification, modified, as required, by an estimate of the effect of the current economic and lending conditions. Fair value for significant nonperforming loans is based on recent external appraisals. If appraisals are not available, estimated cash flows are discounted using a rate commensurate with the risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows, and discount rates are determined using available market information and specific borrower information. LOANS HELD FOR SALE – Loans held for sale are carried at the lower of cost or market value. The fair values of loans held for sale are based on commitments on hand from investors within the secondary market for loans with similar characteristics. MORTGAGE SERVICING RIGHTS – The Company has the rights to service a portfolio of Fannie Mae (“FNMA”) and other government guaranteed loans sold on a servicing retained basis. Servicing rights are measured at fair value when the loan is sold and subsequently measured at fair value on a recurring basis utilizing Level 2 inputs. Management uses a model operated and maintained by a third party to calculate the present value of future cash flows using the third party's market-based assumptions. The future cash flows for each asset are based on the asset's unique characteristics and the third party's market-based assumptions for prepayment speeds, default and voluntary prepayments. Adjustments to fair value are recorded as a component of "Gain on sale of loans" in the consolidated statements of income. ASSETS HELD FOR SALE – The fair value of assets held for sale by the Company is generally based on the most recent appraisals of the asset or other market information as it becomes available to management. DEPOSITS – The fair value of deposits with no stated maturity, such as noninterest-bearing demand deposits, savings, money market and checking accounts, is equal to the amount payable on demand. The fair value of time deposits is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. BORROWINGS – The fair value of the Company’s FHLB advances is estimated based on the discounted value of contractual cash flows. The fair value of securities sold under agreements to repurchase approximates the carrying amount because of the short maturity of these borrowings. The discount rate is estimated using rates quoted for the same or similar issues or the current rates offered to the Company for debt of the same remaining maturities. FLOATING RATE JUNIOR SUBORDINATED DEBT - The fair value of the Company's floating rate junior subordinated debt is based primarily upon discounted cash flows using rates for securities with similar terms and remaining maturities. ACCRUED INTEREST AND DIVIDENDS RECEIVABLE AND PAYABLE – The carrying amount of accrued interest and dividends receivable on loans and investments and payable on borrowings and deposits approximate their fair values. COMMITMENTS TO EXTEND CREDIT AND STANDBY LETTERS OF CREDIT – The value of these unrecognized financial instruments is estimated based on the fee income associated with the commitments which, in the absence of credit exposure, is considered to approximate their settlement value. Since no significant credit exposure existed, and because such fee income is not material to the Company's financial statements at June 30, 2018 and at September 30, 2017 , the fair value of these commitments is not presented. Many of the Company's assets and liabilities are short-term financial instruments whose carrying amounts reported in the Statement of Condition approximate fair value. These items include cash and due from banks, interest-bearing bank balances, federal funds sold, other short-term borrowings and accrued interest receivable and payable balances. The estimated fair value of the Company’s remaining on-balance sheet financial instruments as of June 30, 2018 and September 30, 2017 is summarized below: June 30, 2018 Estimated Fair Value Carrying Value Total Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Financial assets: Cash and cash equivalents $ 170,898,878 $ 170,898,878 $ 170,898,878 $ — $ — Certificates of deposit held at other financial institutions 4,027,270 4,027,270 — 4,027,270 — Investments available for sale 157,232,405 157,232,405 — 157,232,405 — FHLB stock 4,075,200 4,075,200 — 4,075,200 — Restricted securities, at cost 279,000 279,000 — 279,000 — Loans receivable, net 1,151,525,800 1,140,603,407 — — 1,140,603,407 Loans held for sale 1,965,657 1,998,594 — 1,998,594 — Mortgage servicing rights 1,547,380 1,547,380 — 1,547,380 — Assets held for sale 112,300 112,300 — — 112,300 Accrued interest and dividends receivable 4,354,702 4,354,702 — 678,583 3,676,119 Financial liabilities: Deposits $ 1,317,738,045 $ 1,319,365,403 $ — $ 1,319,365,403 $ — FHLB advances 60,011,100 59,184,249 — 59,184,249 — Floating rate junior subordinated debt 6,827,470 6,827,470 — 6,827,470 — Accrued interest payable 572,463 572,463 — 572,463 — September 30, 2017 Estimated Fair Value Carrying Value Total Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Financial assets: Cash and cash equivalents $ 152,338,389 $ 152,338,389 $ 152,338,389 $ — $ — Certificates of deposit held at other financial institutions 7,514,630 7,514,630 — 7,514,630 — Investments available for sale 183,789,821 183,789,821 — 183,789,821 — FHLB stock 4,054,400 4,054,400 — 4,054,400 — Restricted securities, at cost 279,000 279,000 — 279,000 — Loans receivable, net 1,149,276,182 1,146,902,727 — — 1,146,902,727 Loans held for sale 1,961,185 1,998,988 — 1,998,988 — Mortgage servicing rights 1,319,725 1,319,725 — 1,319,725 — Assets held for sale 752,300 752,300 — — 752,300 Accrued interest and dividends receivable 4,197,708 4,197,708 — 661,335 3,536,373 Financial liabilities: Deposits $ 1,339,143,287 $ 1,342,831,689 $ — $ 1,342,831,689 $ — FHLB advances 60,023,100 61,073,866 — 61,073,866 — Floating rate junior subordinated debt 6,724,646 6,724,646 — 6,724,646 — Accrued interest payable 704,630 704,630 — 704,630 —

Income Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the United States Government enacted the Tax Act. The Tax Act amends the Internal Revenue Code of 1986 to reduce tax rates and modify policies, credits, and deductions for individuals and businesses. For businesses, the Tax Act reduces the corporate federal tax rate from a maximum of 35% to a flat 21% rate. The corporate tax rate reduction was effective January 1, 2018. Because the Company operates with a fiscal year end of September 30, the reduced tax rate will result in the application of a blended federal statutory tax rate of 24.5% for its fiscal year 2018 and then a flat 21% thereafter. Under GAAP, the Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. At September 30, 2017 , the Company's deferred tax assets and liabilities, which netted to a total $6.0 million deferred tax asset, were determined based on the then-current enacted federal tax rate of 35% . As a result of the reduction in the corporate income tax rate under the Tax Act, the Company revalued its deferred tax assets and liabilities at June 30, 2018 . Deferred tax assets and liabilities expected to be realized in fiscal year 2018 were re-measured using the aforementioned blended rate. All remaining deferred tax assets and liabilities were remeasured using the new statutory federal rate of 21% . These re-measurements collectively resulted in a discrete tax expense of $40,000 and $1.5 million that was recognized during the three and nine months ended June 30, 2018 , respectively. The Company's revaluation of its deferred tax assets and liabilities is subject to further clarification of the Tax Act and refinement of its estimates. As a result, the actual impact on the deferred tax assets and liabilities and income tax expense due to the Tax Act may vary from the amounts currently estimated. During the nine months ended June 30, 2018 , the Company also reclassified $1.4 million of its former deferred tax asset to its current tax payable, reported as part of Other liabilities in the Company's statement of financial condition, due to a change in recognition method. The Company's estimated deferred tax assets and liabilities at June 30, 2018 and actual deferred tax assets and liabilities at September 30, 2017 are presented below: June 30, 2018 September 30, 2017 Gross deferred tax assets $ 7,320,418 $ 9,709,150 Gross deferred tax liabilities 3,443,490 3,738,868 Net deferred tax assets $ 3,876,928 $ 5,970,282 The Company's effective tax rate was 30.94% and 34.49% for the three and nine months ended June 30, 2018 , respectively, and is estimated to be 33.01% for the full fiscal year 2018. Taxes on income and the related impact on the Company's effective income tax rate for the nine months ended June 30, 2018 are shown below: Amount Percentage of Income Before Taxes Tax expense before one-time charges $ 6,021,258 27.60 % Revaluation of net deferred tax asset 1,504,675 6.89 Total $ 7,525,933 34.49 %

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Accounting	The accompanying unaudited interim consolidated financial statements of Charter Financial and the Bank include the accounts of the Company and the Bank as of June 30, 2018 and September 30, 2017 (derived from audited financial statements), and for the three and nine -month periods ended June 30, 2018 and 2017 . All intercompany accounts and transactions have been eliminated in consolidation. The unaudited interim consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, the unaudited interim condensed consolidated financial statements include all necessary adjustments, consisting of normal recurring accruals, necessary for a fair presentation for the periods presented. The results of operations for the three and nine -month period ended June 30, 2018 , are not necessarily indicative of the results that may be expected for the entire year or any other interim period.
Use of Estimates	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, the estimates used for fair value acquisition accounting, the estimate of expected cash flows on purchased impaired and other acquired loans, and the assessment for other-than-temporary impairment of investment securities, mortgage-backed securities, collateralized mortgage-backed securities and collateralized mortgage obligations.
Reclassification	Certain reclassifications of prior fiscal year balances have been made to conform to classifications used in the current fiscal year. These reclassifications did not change net income or stockholders' equity.
Recent Accounting Pronouncements	In June 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-07, Compensation - Stock Compensation (Topic 718): Improvements to Non-Employee Share-Based Payment Accounting (“ASU 2018-07”). The amendments in this update are part of the FASB's Simplification Initiative, and expand the scope of Topic 718, Compensation - Stock Compensation, which currently only includes share-based payments issued to employees, to also include share-based payments issued to nonemployees for goods and services. As a result, the accounting for share-based payments to nonemployees and employees will be substantially aligned. The ASU supersedes Subtopic 505-50, Equity - Equity-Based Payments to Non-Employees. The amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor's own operations by issuing share-based payment awards except when they are used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Topic 606, Revenue from Contracts with Customers. The amendments change numerous current GAAP practices for share-based payments to nonemployees, including the overall measurement objective, measurement date, awards with performance conditions, and classification reassessment of certain equity-classified awards. The amendments in this ASU affect all companies that enter into share-based payment transactions for acquiring goods or services from nonemployees, and are effective for public companies for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted, but no earlier than a company's adoption date of Topic 606. The Company does not anticipate a material effect from adoption of this standard on its consolidated financial statements. In May 2018, the FASB issued ASU 2018-06, Codification Improvements to Topic 942, Financial Services - Depository and Lending . The amendments in this update are intended to supersede outdated guidance related to the Office of the Comptroller of the Currency's (“OCC”) Banking Circular 202, Accounting for Net Deferred Tax Charges (Circular 202). The guidance has been rescinded by the OCC and is no longer relevant. Prior guidance from the OCC limited the net deferred tax debits that can be carried on a bank's statement of condition for regulatory purposes to the amount that would be recoverable by carryback of net operating losses. With the guidance now rescinded, that limitation for regulatory purposes is no longer applicable. The amendment is effective upon issuance. The guidance does not impact the Company's consolidated statements of financial condition. In March 2018, the FASB issued ASU 2018-05, Income Taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 . The amendments in this update address certain accounting items for current and deferred income taxes related to the Tax Cuts and Jobs Act (“the Tax Act”). Under these amendments, a Company is expected to record any income tax effects that can be reasonably estimated from the Tax Act in its financial statements, while allowing for those items which cannot be reasonably estimated to remain unrecorded. The amendments are effective immediately. The Company recorded additions to income tax expense in its consolidated statements of income that could reasonably be estimated in the amount of $40,000 and $1.5 million during the three and nine months ended June 30, 2018 , respectively. In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The amendments in this update allow for a reclassification of stranded tax effects resulting from the Tax Act from accumulated other comprehensive income to retained earnings. The amendments in this update are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted and the Company elected to early adopt this guidance effective March 31, 2018. The adoption resulted in a reclassification of stranded tax effects of $245,000 from accumulated other comprehensive loss to retained earnings in the Company's consolidated statements of financial condition and stockholders' equity at June 30, 2018 . In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities , which is intended to better align hedge accounting with an organization's risk management activities in the financial statements. The ASU also simplifies the application of hedge accounting guidance in areas where practice issues exist. The amendments in this ASU are intended to address financial statement user concerns over hedge accounting through changes to the guidance that will accomplish the following: (1) expand hedge accounting for nonfinancial and financial risk components and amend measurement methodologies to more closely align hedge accounting with a company's risk management activities; (2) decrease the complexity of preparing and understanding hedge results through eliminating the separate measurement and reporting of hedge ineffectiveness; (3) enhance transparency, comparability, and understandability of hedge results through enhanced disclosures and changing the presentation of hedge results to align the effects of the hedging instrument and the hedged item; and (4) reduce the cost and complexity of applying hedge accounting by simplifying the manner in which assessments of hedge effectiveness may be performed. The standard applies broadly to any company that elects to apply hedge accounting in accordance with current accounting principles generally accepted in the United States of America (“GAAP”), and will be effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company does not currently apply hedge accounting but may do so in the future, and is in the process of determining the impact this standard would have on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , which sets forth a "current expected credit loss" (“CECL”) model requiring the Company to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. For public business entities that are U.S. Securities and Exchange Commission filers, the amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company has assembled a transition team to assess the adoption of this ASU, which is in the process of developing a project plan regarding implementation and has contracted with a third-party provider to implement enhanced modeling techniques and a more automated database solution. The team is currently evaluating data and software requirements for implementation, and plans to run parallel models for a year prior to implementation. The Company is currently in the process of determining the impact of adopting this standard. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The FASB issued this ASU to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet by lessees for those leases classified as operating leases under current U.S. GAAP and disclosing key information about leasing arrangements. The amendments in this ASU are effective for public business entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early application of this ASU is permitted for all entities. The Company is in the process of evaluating its current inventory of leases to determine the impact of adoption of this standard. In January 2016, the FASB issued ASU 2016-01, Financial Instruments-Recognition and Measurement of Financial Assets and Liabilities , which is intended to improve the recognition and measurement of financial instruments by requiring: equity investments (other than equity method or consolidation) to be measured at fair value with changes in fair value recognized in net income; public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements; eliminating the requirement to disclose the fair value of financial instruments measured at amortized cost for organizations that are not public business entities; eliminating the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; and requiring a reporting organization to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk (also referred to as “own credit”) when the organization has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This ASU is effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. This ASU permits early adoption of the instrument-specific credit risk provision. The adoption of ASU 2016-01 on October 1, 2018, is not expected to have a material impact on the Company's consolidated financial position, results of operations or cash flows. In May 2014, the FASB issued ASU 2014-09, Revenue From Contracts With Customers . This standard outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry specific guidance. The core principle of the revenue model is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard was to be effective for annual reporting periods beginning after December 15, 2016. In August 2015, the FASB issued ASU 2015-14, deferring the effective date for the standard to reporting periods beginning after December 15, 2017. As a financial institution, the Company's revenue is more significantly weighted towards net interest income on its financial assets and liabilities, which is explicitly excluded from the scope of the new standard. The Company continues to assess its revenue streams and review its contracts with customers that are potentially affected by the new guidance, such as fees on deposits, gains and losses on the sale of other real estate owned, bankcard fees and brokerage commissions, to determine the potential impact the new guidance is expected to have on the Company's consolidated financial statements. The Company's revenue recognition pattern for these revenue streams, however, is not expected to change materially from current practice. The Company also continues to follow implementation issues specific to financial institutions which are still under discussion by the FASB's Transition Resource Group. The Company plans to adopt the ASU on October 1, 2018, most likely under the modified retrospective approach.
Loans and Interest Income	Loan Origination and Risk Management. The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and nonperforming and potential problem loans. Diversification in the loan portfolio is a means of managing risk associated with fluctuations in economic conditions. Commercial real estate loans are generally made by the Company to entities in Georgia, Alabama, Florida and adjoining states and are secured by properties in these states. Commercial real estate lending involves different risks compared to one- to four-family residential lending. Repayment of commercial real estate loans often depends on the successful operations and income stream of the borrowers, and commercial real estate loans typically involve larger loan balances to single borrowers or groups of related borrowers compared to residential real estate loans. The Company’s underwriting criteria for commercial real estate loans include maximum loan-to-value ratios, debt coverage ratios, secondary sources of repayment, guarantor requirements, net worth requirements and quality of cash flow. As part of the loan approval and underwriting of commercial real estate loans, management undertakes a cash flow analysis, and generally requires a debt-service coverage ratio of at least 1.15 times. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. At June 30, 2018 , approximately 32.1% of the outstanding principal balance of the Company’s commercial real estate loans was secured by owner-occupied properties. The Company makes construction and land development loans primarily for the construction of one- to four-family residences but also for multi-family and nonresidential real estate projects on a select basis. The Company offers construction loans to builders including both speculative (unsold) and pre-sold loans to pre-approved local builders. The number of speculative loans that management will extend to a builder at one time depends upon the financial strength and credit history of the builder. The Company’s construction loan program is expected to remain a modest portion of the loan volume, and management generally limits the number of outstanding loans on unsold homes under construction within a specific area. The Company also originates first and second mortgage loans and home equity lines of credit secured by one- to four-family residential properties within Georgia, Alabama and the Florida panhandle. Management currently originates mortgages at all branch locations, but utilizes a centralized underwriting location to reduce risk. The Company originates both fixed rate and adjustable rate one- to four-family residential mortgage loans. Fixed rate 30-year conforming loans are generally originated for sale into the primary or secondary markets and loans that are non-conforming due to property exceptions and that have adjustable rates are generally retained in the Company’s portfolio. The non-conforming loans originated are not considered to be subprime loans and the amount of subprime and low documentation loans held by the Company is not material. The Company also offers home equity lines of credit as a complement to one- to four-family residential mortgage lending. The underwriting standards applicable to home equity credit lines are similar to those for one- to four-family residential mortgage loans, except for slightly more stringent credit-to-income and credit score requirements. Home equity loans are generally limited to 90% of the value of the underlying property unless the loan is covered by private mortgage insurance. At June 30, 2018 , the Company had $44.8 million of home equity lines of credit and second mortgage loans. The Company originates consumer loans that consist of loans on deposits, auto loans, purchased mobile home loans, and various other installment loans. The Company primarily offers consumer loans as an accommodation to customers. Consumer loans tend to have a higher credit risk than residential mortgage loans because they may be secured by rapidly depreciable assets, or may be unsecured. The Company’s consumer lending generally follows accepted industry standards for non-subprime lending, including credit scores and debt to income ratios. The Company’s commercial business loans are generally limited to terms of ten years or less. While management typically collateralizes these loans with a lien on commercial real estate or, much less frequently, with a lien on business assets and equipment, the primary underwriting consideration is the business cash flow. Management also generally requires the personal guarantee of the business owner. Interest rates on commercial business loans are generally higher than interest rates on residential or commercial real estate loans due to the risk inherent in this type of loan. Commercial business loans are generally considered to have more risk than residential mortgage loans or commercial real estate loans because the collateral may be in the form of intangible assets and/or readily depreciable inventory. Commercial business loans may also involve relatively large loan balances to single borrowers or groups of related borrowers, with the repayment of such loans typically dependent on the successful operation and income stream of the borrower. Such risks can be significantly affected by economic conditions. In addition, commercial business lending generally requires substantially greater supervision efforts by management compared to residential mortgage or commercial real estate lending. The Company also has a portfolio of Small Business Administration (“SBA”) loans, which are generally related to commercial lending. Each loan has either a portion guaranteed by the SBA or other credit enhancements provided by the government. The Company maintains an internal loan review function that reviews and validates the credit risk program on a periodic basis. Results of these reviews are presented to management. The loan review process complements and reinforces the risk identification and assessment decisions made by lenders and credit personnel, as well as the Company’s policies and procedures. Loans are classified as restructured by the Company when certain modifications are made to the loan terms and concessions are granted to the borrowers due to financial difficulty experienced by those borrowers. The Company only restructures loans for borrowers in financial difficulty that have presented a viable business plan to fully pay off all obligations, including outstanding debt, interest, and fees, either by generating additional income from the business or through liquidation of assets. Generally, these loans are restructured to provide the borrower additional time to execute upon their plans. The concessions granted on TDRs generally include terms to reduce the interest rate or extend the term of the debt obligation. Loans on nonaccrual status at the date of modification are initially classified as nonaccrual TDRs. Loans on accruing status at the date of concession are initially classified as accruing TDRs if the loan is reasonably assured of repayment and performance is expected in accordance with its modified terms. Such loans may be designated as nonaccrual loans subsequent to the concession date if reasonable doubt exists as to the collection of interest or principal under the restructuring agreement. TDRs are returned to accruing status when there is economic substance to the restructuring, there is documented credit evaluation of the borrower’s financial condition, the remaining balance is reasonably assured of repayment in accordance with its modified terms, and the borrower has demonstrated sustained repayment performance in accordance with the modified terms for a reasonable period of time (generally a minimum of six months ).
Impaired Loans	Impaired Loans. The Company evaluates “impaired” loans, which include nonperforming loans and accruing troubled debt restructured loans having risk characteristics that are unique to an individual borrower, on a loan-by-loan basis with balances above a specified level. For smaller loans, the allowance is calculated based on the credit grade utilizing historical loss experience and other qualitative factors.
Allowance for Loan Losses	Allowance for Loan Losses . The allowance for loan losses is established through a provision for loan losses charged to expense and is an amount that management believes will be adequate to absorb losses on existing loans that become uncollectible, based on evaluations of the collectability of loans. The evaluations take into consideration such factors as changes in the nature and volume of the loan portfolio, historical loss rates, overall portfolio quality, review of specific problem loans, and current economic conditions and trends that may affect a borrower’s ability to repay. Loans are charged against the allowance for loan losses when management believes that the collectability of the principal is unlikely. Subsequent recoveries are added to the allowance. Management’s allowance for loan losses methodology is a loan classification-based system. Management bases the required reserve on a percentage of the loan balance for each type of loan and classification level. Loans may be classified manually and are automatically classified if they are not previously classified when they reach certain levels of delinquency. Unclassified loans are reserved at different percentages based on the loan loss history of the last seven years . Reserve percentages are also adjusted based upon our estimate of the effect that the current economic environment will have on each type of loan. Management segments its allowance for loan losses into the following four major categories: (1) specific reserves; (2) general allowances for Classified/Watch loans; (3) general allowances for loans with satisfactory ratings; and (4) an unallocated amount. Risk ratings are initially assigned in accordance with CharterBank’s loan and collection policy. An organizationally independent department reviews risk grade assignments on an ongoing basis. Management reviews current information and events regarding a borrowers’ financial condition and strengths, cash flows available for debt repayment, the related collateral supporting the loan and the effects of known and expected economic conditions. When the evaluation reflects a greater than normal risk associated with the individual loan, management classifies the loan accordingly. If the loan is determined to be impaired, management allocates a portion of the allowance for loan losses for that loan based on the fair value of the collateral, if the loan is considered collateral-dependent, as the measure for the amount of the impairment. Impaired and Classified/Watch loans are aggressively monitored. The allowances for loans by credit grade are further subdivided by loan type. Charter Financial has developed specific quantitative allowance factors to apply to each loan which considers loan charge-off experience over the most recent seven years by loan type. In addition, loss estimates are applied for certain qualitative allowance factors that are subjective in nature and require considerable judgment on the part of management. Such qualitative factors include economic and business conditions, the volume of past due loans, changes in the value of collateral of collateral-dependent loans, and other economic uncertainties. An unallocated component of the allowance is also established for potential losses that exist in the remainder of the portfolio, but have yet to be identified. The Company incorporates certain refinements and improvements to its allowance for loan losses methodology from time to time. During the current quarter and the prior fiscal year, the Company made minor refinements to the qualitative risk factors but no significant changes to its allowance methodology. The adjustments in the Company's methodology were not material to the overall allowance or provision for the three and nine months ended June 30, 2018 or for the fiscal year ended September 30, 2017 . An unallocated allowance is generally maintained in a range of 4% to 12% of the total allowance in recognition of the imprecision of the estimates and other factors. In times of greater economic downturn and uncertainty, the higher end of this range is provided.
Income Per Share	Basic net income per share for the three and nine months ended June 30, 2018 and 2017 was computed by dividing net income to common shareholders by the weighted average number of shares of common stock outstanding, which consists of issued shares less unallocated employee stock ownership plan (“ESOP”) shares and unvested restricted shares. Diluted net income per share for the three and nine months ended June 30, 2018 and 2017 was computed by dividing net income by weighted average shares outstanding plus potential common shares resulting from dilutive stock options and unvested restricted shares, determined using the treasury stock method.
Commitments and Contingent Liabilities	In the normal course of business, the Company makes various commitments and incurs certain contingent liabilities, which are not reflected in the accompanying financial statements. The commitments and contingent liabilities include guarantees, commitments to extend credit, and standby letters of credit. At June 30, 2018 , commitments to extend credit and standby letters of credit totaled $249.4 million . The Company does not anticipate any material losses as a result of these transactions. In the normal course of business, the Company is party (both as plaintiff and defendant) to certain matters of litigation. In the opinion of management, none of these matters, with the possible exception of matters discussed below, should have a material adverse effect on the Company’s financial position or results of operation.
Fair Value of Financial Instruments	Loans considered impaired are loans for which, based on current information and events, it is probable that the creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. Impaired loans are subject to nonrecurring fair value adjustments to reflect write-downs that are based on the market price or current appraised value of the collateral, adjusted to reflect local market conditions or other economic factors. After evaluating the underlying collateral, the fair value of the impaired loans is determined by allocating specific reserves from the allowance for loan and lease losses to the loans. Thus, the fair value reflects the loan balance as adjusted by partial chargedowns less the specifically allocated reserve. Certain collateral-dependent impaired loans are reported at the fair value of the underlying collateral. Impairment is measured based on the fair value of the collateral, which is typically derived from appraisals that take into consideration prices in observed transactions involving similar assets and similar locations. Each appraisal is updated on an annual basis, either through a new appraisal or through the Company’s comprehensive internal review process. Appraised values are reviewed and monitored internally and fair value is re-assessed at least quarterly or more frequently when circumstances occur that indicate a change in fair value. The fair value of impaired loans that are not collateral dependent is measured using a discounted cash flow analysis considered to be a Level 3 input. OREO is initially accounted for at fair value, less estimated costs to dispose of the property. Any excess of the recorded investment over fair value, less costs to dispose, is charged to the allowance for loan and lease losses at the time of foreclosure. A provision is charged to earnings for subsequent losses on OREO when market conditions indicate such losses have occurred. The ability of the Company to recover the carrying value of OREO is based upon future sales of the real estate. The ability to effect such sales is subject to market conditions and other factors beyond the Company's control, and future declines in the value of the real estate would result in a charge to earnings. The recognition of sales and gain on sales is dependent upon whether the nature and terms of the sales, including possible future involvement of the Company, if any, meet certain defined requirements. If those requirements are not met, sale and gain recognition is deferred. OREO represents real property taken by the Company either through foreclosure or through a deed in lieu thereof from the borrower. The fair value of OREO is based on property appraisals adjusted at management’s discretion to reflect a further decline in the fair value of properties since the time the appraisal analysis was performed. It has been the Company’s experience that appraisals may become outdated due to the volatile real-estate environment. Appraised values are reviewed and monitored internally and fair value is re-assessed at least quarterly or more frequently when circumstances occur that indicate a change in fair value. Therefore, the inputs used to determine the fair value of OREO and repossessed assets fall within Level 3. The Company may include within OREO other repossessed assets received as partial satisfaction of a loan. These assets are not material and do not typically have readily determinable market values and are considered Level 3 inputs. Accounting standards define fair value as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Accounting standards also establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The applicable standard describes three levels of inputs that may be used to measure fair value: 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, and 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 evaluates fair value measurement inputs on an ongoing basis in order to determine if there is a change of sufficient significance to warrant a transfer between levels. For example, changes in market activity or the addition of new unobservable inputs could, in the Company’s judgment, cause a transfer to either a higher or lower level. For the three and nine months ended June 30, 2018 , there were no transfers between levels. All of the Company’s available for sale securities fall into Level 2 of the fair value hierarchy. These securities are priced via independent service providers. In obtaining such valuation information, the Company has evaluated the valuation methodologies used to develop the fair values. At June 30, 2018 , the Company holds, as part of its investment portfolio, available for sale securities reported at fair value consisting of state and municipal securities, collateralized loan obligations (“CLO”), mortgage-backed securities and collateralized mortgage obligations. The fair value of the majority of these securities is determined using widely accepted valuation techniques including matrix pricing and broker-quote based applications. Inputs include benchmark yields, reported trades, issuer spreads, prepayment speeds and other relevant items. These are inputs used by a third-party pricing service used by the Company. To validate the appropriateness of the valuations provided by the third party, the Company regularly updates its understanding of the inputs used and compares valuations to an additional third party source. The Company also holds assets available for sale reported at fair value and included in other assets on the Company's balance sheet, consisting of one former branch and a parcel of land adjacent to a current branch. These assets are included in other assets on the Company's condensed consolidated statements of financial condition. The fair value of these assets is determined using current appraisals adjusted at management’s discretion to reflect any decline in the fair value of the properties since the time the appraisal was performed. Appraisal values are reviewed and monitored internally and fair value is reassessed at least quarterly or more frequently when circumstances occur that indicate a change in fair value. All of the Company’s assets held for sale fall into level 3 of the fair value hierarchy. Accounting standards require disclosures of fair value information about financial instruments, whether or not recognized in the Statement of Condition, for which it is practicable to estimate that value. In cases where quoted market prices are not available, fair value is based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. Also, the fair value estimates presented herein are based on pertinent information available to management as of June 30, 2018 and September 30, 2017 . The following methods and assumptions were used by the Company in estimating its fair value disclosures for financial instruments: CASH AND CASH EQUIVALENTS – The carrying amount approximates fair value because of the short maturity of these instruments. CERTIFICATES OF DEPOSIT HELD AT OTHER FINANCIAL INSTITUTIONS – The fair value of certificates of deposit held at other financial institutions is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. INVESTMENTS AVAILABLE FOR SALE, FHLB STOCK, AND RESTRICTED SECURITIES – The fair value of investment and mortgage-backed securities and collateralized mortgage obligations available for sale is estimated based on bid quotations received from securities dealers. The FHLB stock and restricted securities are considered restricted stock and are carried at cost which approximates their fair value. LOANS RECEIVABLE – Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type. The fair value of performing loans is calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit risk inherent in the loan. The estimate of maturity is based on the Company’s historical experience with repayments for each loan classification, modified, as required, by an estimate of the effect of the current economic and lending conditions. Fair value for significant nonperforming loans is based on recent external appraisals. If appraisals are not available, estimated cash flows are discounted using a rate commensurate with the risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows, and discount rates are determined using available market information and specific borrower information. LOANS HELD FOR SALE – Loans held for sale are carried at the lower of cost or market value. The fair values of loans held for sale are based on commitments on hand from investors within the secondary market for loans with similar characteristics. MORTGAGE SERVICING RIGHTS – The Company has the rights to service a portfolio of Fannie Mae (“FNMA”) and other government guaranteed loans sold on a servicing retained basis. Servicing rights are measured at fair value when the loan is sold and subsequently measured at fair value on a recurring basis utilizing Level 2 inputs. Management uses a model operated and maintained by a third party to calculate the present value of future cash flows using the third party's market-based assumptions. The future cash flows for each asset are based on the asset's unique characteristics and the third party's market-based assumptions for prepayment speeds, default and voluntary prepayments. Adjustments to fair value are recorded as a component of "Gain on sale of loans" in the consolidated statements of income. ASSETS HELD FOR SALE – The fair value of assets held for sale by the Company is generally based on the most recent appraisals of the asset or other market information as it becomes available to management. DEPOSITS – The fair value of deposits with no stated maturity, such as noninterest-bearing demand deposits, savings, money market and checking accounts, is equal to the amount payable on demand. The fair value of time deposits is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. BORROWINGS – The fair value of the Company’s FHLB advances is estimated based on the discounted value of contractual cash flows. The fair value of securities sold under agreements to repurchase approximates the carrying amount because of the short maturity of these borrowings. The discount rate is estimated using rates quoted for the same or similar issues or the current rates offered to the Company for debt of the same remaining maturities. FLOATING RATE JUNIOR SUBORDINATED DEBT - The fair value of the Company's floating rate junior subordinated debt is based primarily upon discounted cash flows using rates for securities with similar terms and remaining maturities. ACCRUED INTEREST AND DIVIDENDS RECEIVABLE AND PAYABLE – The carrying amount of accrued interest and dividends receivable on loans and investments and payable on borrowings and deposits approximate their fair values. COMMITMENTS TO EXTEND CREDIT AND STANDBY LETTERS OF CREDIT – The value of these unrecognized financial instruments is estimated based on the fee income associated with the commitments which, in the absence of credit exposure, is considered to approximate their settlement value. Since no significant credit exposure existed, and because such fee income is not material to the Company's financial statements at June 30, 2018 and at September 30, 2017 , the fair value of these commitments is not presented. Many of the Company's assets and liabilities are short-term financial instruments whose carrying amounts reported in the Statement of Condition approximate fair value. These items include cash and due from banks, interest-bearing bank balances, federal funds sold, other short-term borrowings and accrued interest receivable and payable balances.
Income Taxes	Under GAAP, the Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Summary of the Assets Acquired and Liabilities Assumed	The following table provides a summary of the assets acquired and liabilities assumed of Resurgens as recorded by the Company. As provided for under GAAP, management has up to one year following the date of acquisition to finalize the fair values of the acquired assets and assumed liabilities. The fair values shown in the following table have been determined by management to be the Day 1 Fair Values. Purchase Price: Cash paid to Resurgens shareholders $ 25,775,313 Fair value of assets acquired: Cash and cash equivalents $ 31,196,692 Loans receivable, net 128,756,348 Federal Home Loan Bank stock 569,800 Premises and equipment 1,507,309 Accrued interest and dividends receivable 468,900 Core deposit intangible 1,536,000 Bank owned life insurance 3,051,900 Deferred tax assets 393,195 Other assets 476,458 Total assets acquired 167,956,602 Fair value of liabilities assumed: Deposits 138,031,166 Federal Home Loan Bank advances 10,024,100 Other borrowings 3,250,000 Advance payments by borrowers for taxes and insurance 47,592 Other liabilities 382,053 Total liabilities assumed $ 151,734,911 Fair value of net assets acquired 16,221,691 Goodwill recognized for Resurgens $ 9,553,622

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Jun. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities	Investment securities available for sale are summarized as follows: June 30, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 1,569,292 $ — $ (12,479 ) $ 1,556,813 Collateralized loan obligations 43,803,295 41,725 (120,258 ) 43,724,762 Mortgage-backed securities: FHLMC certificates 18,171,186 — (442,800 ) 17,728,386 FNMA certificates 94,749,446 25,971 (3,926,177 ) 90,849,240 GNMA certificates 1,026,048 — (37,304 ) 988,744 Private-label mortgage securities: (1) Investment grade 371,308 1,016 — 372,324 Split rating (2) 1,559,834 — (73,150 ) 1,486,684 Non-investment grade 537,422 — (11,970 ) 525,452 Total $ 161,787,831 $ 68,712 $ (4,624,138 ) $ 157,232,405 ________________________________ (1) Credit ratings are current as of June 30, 2018 . (2) Bonds with split ratings represent securities with both investment and non-investment grades. September 30, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 2,238,758 $ 13,177 $ (120 ) $ 2,251,815 Collateralized loan obligations 40,629,368 92,000 (43,692 ) 40,677,676 Mortgage-backed securities: FHLMC certificates 21,657,987 220,228 (123,093 ) 21,755,122 FNMA certificates 114,740,214 177,495 (1,926,890 ) 112,990,819 GNMA certificates 2,504,334 2,645 (916 ) 2,506,063 Private-label mortgage securities: Investment grade 614,679 — (23,236 ) 591,443 Split rating (1) 2,337,239 — (87,569 ) 2,249,670 Non-investment grade 790,956 — (23,743 ) 767,213 Total $ 185,513,535 $ 505,545 $ (2,229,259 ) $ 183,789,821 ______________________________ (1) Bonds with split ratings represent securities with both investment and non-investment grades.
Investments Classified by Contractual Maturity Date	The amortized cost and estimated fair value of investment securities available for sale as of June 30, 2018 , by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Cost Estimated Fair Value Due within one year $ 500,751 $ 500,595 Due from one year to five years 1,068,541 1,056,218 Due after five years 43,803,295 43,724,762 Mortgage-backed securities 116,415,244 111,950,830 Total $ 161,787,831 $ 157,232,405
Securities Available for Sale in Continuous Unrealized Loss Position for Less Than 12 Months	Investment securities available for sale that had been in a continuous unrealized loss position for less than 12 months at June 30, 2018 and September 30, 2017 are as follows: June 30, 2018 Amortized Cost Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 1,569,292 $ (12,479 ) $ 1,556,813 Collateralized loan obligations 27,994,494 (120,259 ) 27,874,235 Mortgage-backed securities: FHLMC certificates 9,123,630 (65,326 ) 9,058,304 FNMA certificates 19,911,981 (701,169 ) 19,210,812 GNMA certificates 1,026,049 (37,304 ) 988,745 Total $ 59,625,446 $ (936,537 ) $ 58,688,909 September 30, 2017 Amortized Cost Gross Unrealized Losses Estimated Fair Value Other investment securities: State and municipal securities $ 556,675 $ (120 ) $ 556,555 Collateralized loan obligations 9,173,224 (43,692 ) 9,129,532 Mortgage-backed securities: FHLMC certificates 10,721,484 (123,093 ) 10,598,391 FNMA certificates 46,902,868 (270,060 ) 46,632,808 GNMA certificates 1,042,769 (916 ) 1,041,853 Private-label mortgage securities 107,879 (211 ) 107,668 Total $ 68,504,899 $ (438,092 ) $ 68,066,807
Securities Available for Sale in Continuous Unrealized Loss Position for Greater Than 12 Months	Investment securities available for sale that had been in a continuous unrealized loss position for greater than 12 months at June 30, 2018 and September 30, 2017 are as follows: June 30, 2018 Amortized Cost Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: FHLMC certificates $ 9,047,555 $ (377,474 ) $ 8,670,081 FNMA certificates 70,810,929 (3,225,008 ) 67,585,921 Private-label mortgage securities 2,097,256 (85,120 ) 2,012,136 Total $ 81,955,740 $ (3,687,602 ) $ 78,268,138 September 30, 2017 Amortized Cost Gross Unrealized Losses Estimated Fair Value Mortgage-backed securities: FNMA certificates $ 59,666,482 $ (1,656,829 ) $ 58,009,653 Private-label mortgage securities 3,634,997 (134,338 ) 3,500,659 Total $ 63,301,479 $ (1,791,167 ) $ 61,510,312

Loans Receivable (Tables)

Loans Receivable (Tables)	9 Months Ended
	Jun. 30, 2018
Receivables [Abstract]
Loans Receivable	Loans outstanding, by portfolio segment, are summarized in the following table: June 30, 2018 September 30, 2017 1-4 family residential real estate $ 246,591,057 $ 232,040,341 Commercial real estate 676,399,345 697,070,779 Commercial 102,936,278 103,673,447 Real estate construction 101,570,279 88,791,799 Consumer and other 36,809,844 39,943,386 Total loans, net of acquisition fair value adjustments 1,164,306,803 1,161,519,752 Unamortized loan origination fees, net (1,284,342 ) (1,165,148 ) Allowance for loan losses (11,496,661 ) (11,078,422 ) Total loans, net $ 1,151,525,800 $ 1,149,276,182
Age Analysis of Past Due Loans	An aging analysis of past due loans, segregated by portfolio segment, at June 30, 2018 and September 30, 2017 was as follows: June 30, 2018 September 30, 2017 Current $ 1,157,740,999 $ 1,155,094,965 Accruing past due loans: 30-89 days past due 1-4 family residential real estate 2,476,122 1,567,688 Commercial real estate 1,265,449 1,490,424 Commercial 113,257 1,000,840 Real estate construction 324,924 — Consumer and other 777,656 659,174 Total 30-89 days past due 4,957,408 4,718,126 90 days or greater past due (1) 1-4 family residential real estate 154,659 46,223 Commercial real estate — — Commercial — — Real estate construction — — Consumer and other 86,983 — Total 90 days or greater past due 241,642 46,223 Total accruing past due loans 5,199,050 4,764,349 Nonaccruing loans: (2) 1-4 family residential real estate 348,150 293,224 Commercial real estate 771,901 1,327,037 Commercial 224,157 40,177 Real estate construction — — Consumer and other 22,546 — Nonaccruing loans 1,366,754 1,660,438 Total loans $ 1,164,306,803 $ 1,161,519,752 ________________________________ (1) No acquired loans are regarded as accruing loans and included in this section at June 30, 2018 or September 30, 2017 . These loans which are accounted for under ASC 310-30 are reported as accruing loans because of the ongoing recognition of accretion income established at the time of acquisition. (2) Acquired loans in the amount of $0 and $888,000 at June 30, 2018 and September 30, 2017 , respectively, are regarded as accruing loans and excluded from the nonaccrual section due to the ongoing recognition of accretion income established at the time of acquisition.
Impaired Loans	Impaired loans for the periods ended June 30, 2018 and September 30, 2017 , segregated by portfolio segment, are presented below. There were $1,251,449 and $48,733 of recorded allowances for loan losses on impaired loans at June 30, 2018 and September 30, 2017 , respectively. Three Months Ended Nine Months Ended Recorded Investment Unpaid Principal Balance Related Allowance Average Investment in Impaired Loans Interest Income Recognized Average Investment in Impaired Loans Interest Income Recognized 1-4 family residential real estate (1) $ 1,051,428 $ 1,208,242 $ 8,020 $ 1,056,993 $ 8,254 $ 1,114,914 $ 42,079 Commercial real estate (2) 8,558,786 9,774,957 1,199,353 8,614,619 97,047 8,878,239 299,275 Commercial 224,157 48,343 — 228,730 — 226,492 2,386 Real estate construction — — — — — — — Consumer and other (3) 135,920 138,799 44,076 137,053 2,407 138,976 7,297 Total impaired loans $ 9,970,291 $ 11,170,341 $ 1,251,449 $ 10,037,395 $ 107,708 $ 10,358,621 $ 351,037 ________________________________ (1) 1-4 family residential real estate loans with related allowances totaling $8,020 had a recorded investment of $29,999 and unpaid principal balance of $33,905 at June 30, 2018 . During the three and nine months ended June 30, 2018 , the Company had an average investment in such loans of $30,360 and $31,050 , respectively, and recorded no interest income on the loans. (2) Commercial real estate loans with related allowances totaling $1,199,353 had a recorded investment of $4,487,205 and unpaid principal balance of $4,807,777 at June 30, 2018 . During the three and nine months ended June 30, 2018 , the Company had an average investment in such loans of $4,508,128 and $4,710,529 , respectively, and recorded $50,716 and $158,980 of interest income, respectively, on the loans. (3) Consumer and other loans with related allowances totaling $44,076 had a recorded investment of $48,937 and unpaid principal balance of $51,817 at June 30, 2018 . During the three and nine months ended June 30, 2018 , the Company had an average investment in such loans of $49,969 and $51,360 , respectively, and recorded $437 and $1,349 of interest income, respectively, on the loans. The recorded investment in accruing troubled debt restructured loans (“TDRs”) at June 30, 2018 totaled $3.9 million and is included in the impaired loan table above. Year Ended Recorded Investment Unpaid Principal Balance Related Allowance Average Investment in Impaired Loans Interest Income Recognized 1-4 family residential real estate (1) $ 955,522 $ 1,143,831 $ 24,434 $ 975,317 $ 33,166 Commercial real estate (2) 5,960,208 6,970,943 24,299 6,131,422 259,651 Commercial 140,012 363,382 — 161,068 — Real estate construction — — — — — Consumer and Other 28,806 30,125 — 30,394 1,976 Total impaired loans $ 7,084,548 $ 8,508,281 $ 48,733 $ 7,298,201 $ 294,793 ________________________________ (1) 1-4 family residential real estate loans with related allowances totaling $24,434 had a recorded investment of $24,434 and unpaid principal balance of $25,131 at September 30, 2017 . During the year ended September 30, 2017 , the Company had an average investment in such loans of $24,858 and recorded $90 of interest income on the loans. (2) Commercial real estate loans with related allowances totaling $24,299 had a recorded investment of $686,520 and unpaid principal balance of $695,762 at September 30, 2017 . During the year ended September 30, 2017 , the Company had an average investment in such loans of $717,892 and recorded $39,825 of interest income on the loans.
Troubled Debt Restructurings	For the nine month periods ended June 30, 2018 and 2017 , the following table presents a breakdown of the types of concessions determined to be TDRs during the period by loan class. Accruing Loans Nonaccrual Loans Nine Months Ended June 30, 2018 Nine Months Ended June 30, 2018 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Payment structure modification: 1-4 family residential real estate 4 $ 195,854 $ 195,854 — $ — $ — Commercial real estate 1 94,337 94,337 2 186,813 186,813 Commercial — — — 2 199,467 199,467 Total 5 $ 290,191 $ 290,191 4 $ 386,280 $ 386,280 Accruing Loans Nonaccrual Loans Nine Months Ended June 30, 2017 Nine Months Ended June 30, 2017 Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Loans Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Payment structure modification: 1-4 family residential real estate 7 $ 441,756 $ 441,756 — $ — $ — Commercial real estate 2 515,639 515,639 — — — Consumer and other — — — 1 32,138 32,138 Total 9 $ 957,395 $ 957,395 1 $ 32,138 $ 32,138
Accretable Discount on Acquired Loans	The following table documents changes in the accretable discount on acquired credit impaired loans during the nine months ended June 30, 2018 and 2017 : Nine Months Ended June 30, 2018 Nine Months Ended June 30, 2017 Balance, beginning of period $ — $ 462,071 Loan accretion — (397,685 ) Balance, end of period $ — $ 64,386
Schedule of Acquired Impaired Loans	The following table presents the outstanding balances and related carrying amounts for all purchase credit impaired loans at the periods ended June 30, 2018 and September 30, 2017 : June 30, 2018 September 30, 2017 Unpaid principal balance $ 16,911,270 $ 18,327,905 Carrying amount 15,819,914 16,974,607
Risk Grades of Loan Portfolio	The following table presents the risk grades of the loan portfolio, segregated by class of loans: June 30, 2018 1-4 family residential real estate Commercial real estate Commercial Real estate construction Consumer and other Total Pass (1-4) $ 243,081,293 $ 644,337,423 $ 101,393,896 $ 101,570,279 $ 36,760,496 $ 1,127,143,387 Special Mention (5) 788,521 13,380,351 1,088,534 — — 15,257,406 Substandard (6) 2,721,243 18,681,571 453,848 — 49,348 21,906,010 Doubtful (7) — — — — — — Loss (8) — — — — — — Total loans $ 246,591,057 $ 676,399,345 $ 102,936,278 $ 101,570,279 $ 36,809,844 $ 1,164,306,803 September 30, 2017 1-4 family residential real estate Commercial real estate Commercial Real estate construction Consumer and other Total Pass (1-4) $ 230,417,503 $ 654,217,207 $ 102,690,306 $ 88,551,410 $ 39,914,580 $ 1,115,791,006 Special Mention (5) — 14,318,249 494,241 240,389 — 15,052,879 Substandard (6) 1,622,838 28,535,323 488,900 — 28,806 30,675,867 Doubtful (7) — — — — — — Loss (8) — — — — — — Total loans $ 232,040,341 $ 697,070,779 $ 103,673,447 $ 88,791,799 $ 39,943,386 $ 1,161,519,752
Allowance for Loan Losses	The following tables present an analysis of the allowance for loan losses by portfolio segment and changes in the allowance for loan losses for the three and nine months ended June 30, 2018 and 2017 . The total allowance for loan losses is disaggregated into those amounts associated with loans individually evaluated and those associated with loans collectively evaluated, as well as loans acquired with deteriorated credit quality. Three Months Ended June 30, 2018 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 777,284 $ 7,612,059 $ 864,346 $ 549,349 $ 187,326 $ 1,120,539 $ 11,110,903 Charge-offs (23,928 ) — — — (3,969 ) — (27,897 ) Recoveries 17,532 186,104 114,973 — 95,046 — 413,655 Provision (69,026 ) 340,210 (332,132 ) 105,444 (75,083 ) 30,587 — Ending balance $ 701,862 $ 8,138,373 $ 647,187 $ 654,793 $ 203,320 $ 1,151,126 $ 11,496,661 Three Months Ended June 30, 2017 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 789,773 $ 7,294,255 $ 715,660 $ 403,180 $ 194,261 $ 1,107,409 $ 10,504,538 Charge-offs — (63,554 ) — — (9,886 ) — (73,440 ) Recoveries 4,785 162,795 197,488 — 4,091 — 369,159 Provision (58,133 ) 31,328 (92,485 ) 201 44,360 74,729 — Ending balance $ 736,425 $ 7,424,824 $ 820,663 $ 403,381 $ 232,826 $ 1,182,138 $ 10,800,257 Nine Months Ended June 30, 2018 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 663,061 $ 7,820,078 $ 776,551 $ 482,665 $ 196,037 $ 1,140,030 $ 11,078,422 Charge-offs (193,298 ) (194,204 ) (128,926 ) — (11,589 ) — (528,017 ) Recoveries 147,175 636,742 397,564 — 114,775 — 1,296,256 Provision 84,924 (124,243 ) (398,002 ) 172,128 (95,903 ) 11,096 (350,000 ) Ending balance $ 701,862 $ 8,138,373 $ 647,187 $ 654,793 $ 203,320 $ 1,151,126 $ 11,496,661 Nine Months Ended June 30, 2017 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Beginning balance $ 779,288 $ 7,346,130 $ 600,258 $ 516,556 $ 79,140 $ 1,050,044 $ 10,371,416 Charge-offs (92,136 ) (112,651 ) — — (21,690 ) — (226,477 ) Recoveries 142,205 917,220 468,657 — 27,236 — 1,555,318 Provision (92,932 ) (725,875 ) (248,252 ) (113,175 ) 148,140 132,094 (900,000 ) Ending balance $ 736,425 $ 7,424,824 $ 820,663 $ 403,381 $ 232,826 $ 1,182,138 $ 10,800,257 Balance at June 30, 2018 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 8,020 $ 1,199,353 $ — $ — $ 44,076 $ — $ 1,251,449 Other loans not individually evaluated 693,842 6,939,020 647,187 654,793 159,244 1,151,126 10,245,212 Ending balance $ 701,862 $ 8,138,373 $ 647,187 $ 654,793 $ 203,320 $ 1,151,126 $ 11,496,661 Loans: Amounts collectively evaluated for impairment $ 243,877,700 $ 656,852,264 $ 99,542,431 $ 101,570,279 $ 36,673,924 $ 1,138,516,598 Amounts individually evaluated for impairment 1,051,428 8,558,786 224,157 — 135,920 9,970,291 Amounts related to loans acquired with deteriorated credit quality 1,661,929 10,988,295 3,169,690 — — 15,819,914 Ending balance $ 246,591,057 $ 676,399,345 $ 102,936,278 $ 101,570,279 $ 36,809,844 $ 1,164,306,803 Balance at September 30, 2017 1-4 family real estate Commercial real estate Commercial Real estate construction Consumer and other Unallocated Total Allowance for loan losses: Individually evaluated for impairment $ 24,434 $ 24,299 $ — $ — $ — $ — $ 48,733 Other loans not individually evaluated 638,627 7,795,779 776,551 482,665 196,037 1,140,030 11,029,689 Ending balance $ 663,061 $ 7,820,078 $ 776,551 $ 482,665 $ 196,037 $ 1,140,030 $ 11,078,422 Loans: Amounts collectively evaluated for impairment $ 229,359,838 $ 679,367,829 $ 100,026,551 $ 88,791,799 $ 39,914,580 $ 1,137,460,597 Amounts individually evaluated for impairment 955,522 5,960,208 140,012 — 28,806 7,084,548 Amounts related to loans acquired with deteriorated credit quality 1,724,981 11,742,742 3,506,884 — — 16,974,607 Ending balance $ 232,040,341 $ 697,070,779 $ 103,673,447 $ 88,791,799 $ 39,943,386 $ 1,161,519,752

Income Per Share (Tables)

Income Per Share (Tables)	9 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three Months Ended Nine Months Ended 2018 2017 2018 2017 Numerator: Net income $ 4,646,113 $ 3,513,850 $ 14,292,625 $ 11,876,312 Denominator: Weighted average common shares outstanding 14,544,417 14,353,082 14,490,993 14,293,859 Common stock equivalents 868,738 903,541 772,535 903,541 Diluted shares 15,413,155 15,256,623 15,263,528 15,197,400 Net income per share: Basic $ 0.32 $ 0.24 $ 0.99 $ 0.83 Diluted $ 0.30 $ 0.23 $ 0.94 $ 0.78

Employee Benefits (Tables)

Employee Benefits (Tables)	9 Months Ended
	Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Assumptions Used in Valuation of Options Awarded	The fair value of the 20,000 options granted during the nine months ended June 30, 2018 was estimated on the date of grant using the Black-Scholes-Merton model with the following assumptions: 20,000 Options Risk-free interest rate 1.90 % Dividend yield 1.76 % Expected life at date of grant (months) 96 months Volatility 18.87 % Weighted average grant-date fair value $ 2.38
Stock Option Activity	The following table summarizes activity for shares under option and weighted average exercise price per share: Shares Weighted average exercise price/share Weighted average remaining life (years) Options outstanding – September 30, 2017 1,565,810 $ 10.14 5 Options exercised (258,840 ) 9.35 3 Options forfeited (20,676 ) 16.74 10 Options granted 20,000 17.02 10 Options outstanding – June 30, 2018 1,306,294 $ 10.30 4 Options exercisable – June 30, 2018 1,052,527 $ 10.09 4
Stock Options Outstanding	The following table summarizes information about the options outstanding at June 30, 2018 : Number of options outstanding at Remaining contractual life in years Exercise price per share 213,344 1 $ 8.82 105,996 2 $ 8.18 40,996 2 $ 7.22 2,494 4 $ 7.79 889,464 6 $ 10.89 30,000 7 $ 12.66 3,000 8 $ 13.16 18,000 8 $ 13.31 3,000 8 $ 13.30 1,306,294
Restricted Stock Award	Shares Weighted average grant date fair Unvested restricted stock awards - September 30, 2017 150,547 $ 11.20 Granted 22,500 17.48 Vested 73,315 11.02 Canceled or expired 15,000 17.02 Unvested restricted stock awards – June 30, 2018 84,732 $ 11.99

Fair Value of Financial Instr27

Fair Value of Financial Instruments and Fair Value Measurement (Tables)	9 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured on Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below. June 30, 2018 Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Investment securities available for sale: State and municipal securities $ 1,556,813 $ — $ 1,556,813 $ — Collateralized loan obligations 43,724,762 — 43,724,762 — Mortgage-backed securities: FHLMC certificates 17,728,386 — 17,728,386 — FNMA certificates 90,849,240 — 90,849,240 — GNMA certificates 988,744 — 988,744 — Private-label mortgage securities: Investment grade 372,324 — 372,324 — Split rating (1) 1,486,684 — 1,486,684 — Non-investment grade 525,452 — 525,452 — Total investment securities available for sale 157,232,405 — 157,232,405 — Mortgage servicing rights 1,547,380 — 1,547,380 — Assets held for sale 112,300 — — 112,300 Total recurring assets at fair value $ 158,892,085 $ — $ 158,779,785 $ 112,300 __________________________________ (1) Bonds with split ratings represent securities with both investment and non-investment grades. September 30, 2017 Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Assets: Investment securities available for sale: State and municipal securities $ 2,251,815 $ — $ 2,251,815 $ — Collateralized loan obligations 40,677,676 — 40,677,676 — Mortgage–backed securities: FHLMC certificates 21,755,122 — 21,755,122 — FNMA certificates 112,990,819 — 112,990,819 — GNMA certificates 2,506,063 — 2,506,063 — Private-label mortgage securities: Investment grade 591,443 — 591,443 — Split rating (1) 2,249,670 — 2,249,670 — Non-investment grade 767,213 — 767,213 — Total investment securities available for sale 183,789,821 — 183,789,821 — Mortgage servicing rights 1,319,725 — 1,319,725 — Assets held for sale 752,300 — — 752,300 Total recurring assets at fair value $ 185,861,846 $ — $ 185,109,546 $ 752,300 __________________________________ (1) Bonds with split ratings represent securities with both investment and non-investment grades.
Assets Measured on Recurring Basis, Unobservable Input Reconciliation	A reconciliation of the beginning and ending balances of Level 3 assets and liabilities recorded at fair value on a recurring basis is as follows: Nine Months Ended June 30, 2018 Nine Months Ended June 30, 2017 Fair value, beginning balance $ 752,300 $ 975,300 Sales (640,000 ) (263,000 ) Valuation loss recognized in noninterest expense — — Fair value, ending balance $ 112,300 $ 712,300
Assets and Liabilities Measured on Nonrecurring Basis	Assets and liabilities measured at fair value on a nonrecurring basis are summarized below. Fair Value Measurements Using: Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs June 30, 2018 Impaired loans $ 1,538,957 $ — $ — $ 1,538,957 Other real estate owned 227,531 — — 227,531 September 30, 2017 Impaired loans $ 2,326,132 $ — $ — $ 2,326,132 Other real estate owned 1,437,345 — — 1,437,345
Quantitative Information about Level 3 Fair Value Measurements	The following table provides information describing the valuation processes used to determine recurring and nonrecurring fair value measurements categorized within Level 3 of the fair value hierarchy at June 30, 2018 : Quantitative Information about Level 3 Fair Value Measurements Fair Value Valuation Technique Unobservable Input General Range (Discount) Weighted Average Discount Impaired Loans $ 1,538,957 Property appraisals Management discount for property type and recent market volatility 23% — 66% 32% OREO $ 227,531 Property appraisals Management discount for property type and recent market volatility 9% — 20% 11% Assets Held for Sale $ 112,300 Valuation analysis Management discount for property type and recent market volatility 0% — 53% 30%
Estimated Fair Value of On-Balance Sheet Financial Instruments	The estimated fair value of the Company’s remaining on-balance sheet financial instruments as of June 30, 2018 and September 30, 2017 is summarized below: June 30, 2018 Estimated Fair Value Carrying Value Total Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Financial assets: Cash and cash equivalents $ 170,898,878 $ 170,898,878 $ 170,898,878 $ — $ — Certificates of deposit held at other financial institutions 4,027,270 4,027,270 — 4,027,270 — Investments available for sale 157,232,405 157,232,405 — 157,232,405 — FHLB stock 4,075,200 4,075,200 — 4,075,200 — Restricted securities, at cost 279,000 279,000 — 279,000 — Loans receivable, net 1,151,525,800 1,140,603,407 — — 1,140,603,407 Loans held for sale 1,965,657 1,998,594 — 1,998,594 — Mortgage servicing rights 1,547,380 1,547,380 — 1,547,380 — Assets held for sale 112,300 112,300 — — 112,300 Accrued interest and dividends receivable 4,354,702 4,354,702 — 678,583 3,676,119 Financial liabilities: Deposits $ 1,317,738,045 $ 1,319,365,403 $ — $ 1,319,365,403 $ — FHLB advances 60,011,100 59,184,249 — 59,184,249 — Floating rate junior subordinated debt 6,827,470 6,827,470 — 6,827,470 — Accrued interest payable 572,463 572,463 — 572,463 — September 30, 2017 Estimated Fair Value Carrying Value Total Estimated Fair Value Quoted Prices in Active Markets Significant Other Observable Inputs Significant Unobservable Inputs Financial assets: Cash and cash equivalents $ 152,338,389 $ 152,338,389 $ 152,338,389 $ — $ — Certificates of deposit held at other financial institutions 7,514,630 7,514,630 — 7,514,630 — Investments available for sale 183,789,821 183,789,821 — 183,789,821 — FHLB stock 4,054,400 4,054,400 — 4,054,400 — Restricted securities, at cost 279,000 279,000 — 279,000 — Loans receivable, net 1,149,276,182 1,146,902,727 — — 1,146,902,727 Loans held for sale 1,961,185 1,998,988 — 1,998,988 — Mortgage servicing rights 1,319,725 1,319,725 — 1,319,725 — Assets held for sale 752,300 752,300 — — 752,300 Accrued interest and dividends receivable 4,197,708 4,197,708 — 661,335 3,536,373 Financial liabilities: Deposits $ 1,339,143,287 $ 1,342,831,689 $ — $ 1,342,831,689 $ — FHLB advances 60,023,100 61,073,866 — 61,073,866 — Floating rate junior subordinated debt 6,724,646 6,724,646 — 6,724,646 — Accrued interest payable 704,630 704,630 — 704,630 —

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Components of Deferred Tax Assets and Liabilities	The Company's estimated deferred tax assets and liabilities at June 30, 2018 and actual deferred tax assets and liabilities at September 30, 2017 are presented below: June 30, 2018 September 30, 2017 Gross deferred tax assets $ 7,320,418 $ 9,709,150 Gross deferred tax liabilities 3,443,490 3,738,868 Net deferred tax assets $ 3,876,928 $ 5,970,282
Schedule of Effective Income Tax Rate Reconciliation	Taxes on income and the related impact on the Company's effective income tax rate for the nine months ended June 30, 2018 are shown below: Amount Percentage of Income Before Taxes Tax expense before one-time charges $ 6,021,258 27.60 % Revaluation of net deferred tax asset 1,504,675 6.89 Total $ 7,525,933 34.49 %

Nature of Operations (Details)

Nature of Operations (Details) $ in Millions	Apr. 08, 2013USD ($)shares	Jun. 30, 2018branch
Number of branch offices		22
Charter Financial
Stock issued during period, shares, new issues (in shares) | shares	14,289,429
Proceeds from public offering, gross | $	$ 142.9
Equity method investment, ownership percentage	100.00%
Charter Financial | Cashless Branch
Number of branch offices		1
Public
Equity method investment, ownership percentage	100.00%

Recent Accounting Pronounceme30

Recent Accounting Pronouncements (Details) - USD ($)	3 Months Ended	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Accounting Changes and Error Corrections [Abstract]
Tax Cuts and Jobs Act of 2017, discrete tax expense	$ 40,000	$ 1,500,000
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of tax effects in AOCI resulting from the new federal corporate income tax rate		0
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of tax effects in AOCI resulting from the new federal corporate income tax rate		$ 245,000

Business Combinations - Additio

Business Combinations - Additional Information (Details)	Apr. 24, 2018USD ($)$ / shares	Sep. 01, 2017USD ($)branch	Apr. 15, 2016USD ($)branch	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)branch	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)branch	Jun. 30, 2017USD ($)	Sep. 30, 2017USD ($)
Business Acquisition [Line Items]
Merger-related expenses					$ 843,887	$ 131	$ 1,770,517	$ 131
Number of branch offices | branch					22		22
Goodwill					$ 39,347,378		$ 39,347,378		$ 39,347,378	[1]
DeKalb County
Business Acquisition [Line Items]
Number of branch offices | branch		2
Cobb County
Business Acquisition [Line Items]
Number of branch offices | branch			4
Merger Agreement
Business Acquisition [Line Items]
Reduction to exercise price (in dollars per share) | $ / shares	$ 23
Merger consideration amount	$ 360,100,000
Merger share price (in dollars per share) | $ / shares	$ 22.76
Merger-related expenses					844,000		844,000
Resurgens Bancorp
Business Acquisition [Line Items]
Merger-related expenses					$ 0	$ 131	$ 927,000	$ 131	$ 1,900,000
Cash paid in acquisition		$ 25,775,313
Goodwill		9,553,622
Repayments of Assumed Debt		3,300,000
Loans receivable, net		128,756,348
Total deposits acquired		$ 138,031,166
Resurgens Bancorp | Forecast
Business Acquisition [Line Items]
Merger-related expenses				$ 0
CBS Financial Corporation
Business Acquisition [Line Items]
Cash paid in acquisition			$ 55,900,000
Goodwill			25,500,000
Payments for stock appreciation rights and stock options			2,900,000
Cash paid to CBS shareholders			58,800,000
Loans receivable, net			300,800,000
Total deposits acquired			$ 333,700,000
CenterState Bank Corporation | Merger Agreement
Business Acquisition [Line Items]
Number of shares issued, per share of common stock held at date of merger	0.738
Cash consideration paid per share of common stock held (in dollars per share) | $ / shares	$ 2.30
Share price (in dollars per share) | $ / shares	$ 27.72
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Business Combinations - Summary

Business Combinations - Summary of the Assets Acquired and Liabilities Assumed (Details) - USD ($)	Sep. 01, 2017	Jun. 30, 2018	Sep. 30, 2017	[1]
Fair value of liabilities assumed:
Goodwill recognized for Resurgens		$ 39,347,378	$ 39,347,378
Resurgens Bancorp
Purchase Price:
Cash paid to Resurgens shareholders	$ 25,775,313
Fair value of assets acquired:
Cash and cash equivalents	31,196,692
Loans receivable, net	128,756,348
Federal Home Loan Bank stock	569,800
Premises and equipment	1,507,309
Accrued interest and dividends receivable	468,900
Core deposit intangible	1,536,000
Bank owned life insurance	3,051,900
Deferred tax assets	393,195
Other assets	476,458
Total assets acquired	167,956,602
Fair value of liabilities assumed:
Deposits	138,031,166
Federal Home Loan Bank advances	10,024,100
Other borrowings	3,250,000
Advance payments by borrowers for taxes and insurance	47,592
Other liabilities	382,053
Total liabilities assumed	151,734,911
Fair value of net assets acquired	16,221,691
Goodwill recognized for Resurgens	$ 9,553,622
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Investment Securities - Summary

Investment Securities - Summary of Available for Sale Securities (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 161,787,831	$ 185,513,535
Gross Unrealized Gains	68,712	505,545
Gross Unrealized Losses	(4,624,138)	(2,229,259)
Estimated Fair Value	157,232,405	183,789,821	[1]
State and municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,569,292	2,238,758
Gross Unrealized Gains	0	13,177
Gross Unrealized Losses	(12,479)	(120)
Estimated Fair Value	1,556,813	2,251,815
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	43,803,295	40,629,368
Gross Unrealized Gains	41,725	92,000
Gross Unrealized Losses	(120,258)	(43,692)
Estimated Fair Value	43,724,762	40,677,676
Mortgage-backed securities: FHLMC certificates
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,171,186	21,657,987
Gross Unrealized Gains	0	220,228
Gross Unrealized Losses	(442,800)	(123,093)
Estimated Fair Value	17,728,386	21,755,122
Mortgage-backed securities: FNMA certificates
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	94,749,446	114,740,214
Gross Unrealized Gains	25,971	177,495
Gross Unrealized Losses	(3,926,177)	(1,926,890)
Estimated Fair Value	90,849,240	112,990,819
Mortgage-backed securities: GNMA certificates
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,026,048	2,504,334
Gross Unrealized Gains	0	2,645
Gross Unrealized Losses	(37,304)	(916)
Estimated Fair Value	988,744	2,506,063
Private-label mortgage securities: investment grade
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	371,308	614,679
Gross Unrealized Gains	1,016	0
Gross Unrealized Losses	0	(23,236)
Estimated Fair Value	372,324	591,443
Private-label mortgage securities: split rating
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,559,834	2,337,239
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(73,150)	(87,569)
Estimated Fair Value	1,486,684	2,249,670
Private-label mortgage securities: non-investment grade
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	537,422	790,956
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(11,970)	(23,743)
Estimated Fair Value	$ 525,452	$ 767,213
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale (Details)	Jun. 30, 2018USD ($)
Investments, Debt and Equity Securities [Abstract]
Amortized cost - Due within one year	$ 500,751
Amortized cost - Due from one year to five years	1,068,541
Amortized cost - Due after five years	43,803,295
Amortized cost - Mortgage-backed securities	116,415,244
Amortized Cost	161,787,831
Estimated fair value - Due within one year	500,595
Estimated fair value - Due from one year to five years	1,056,218
Estimated fair value - Due after five years	43,724,762
Estimated fair value - Mortgage-backed securities	111,950,830
Estimated fair value - Investment securities available for sale	$ 157,232,405

Investment Securities - Additio

Investment Securities - Additional Information (Details) - USD ($)	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Proceeds from maturities or calls of investment securities available for sale	$ 12,290,000	$ 19,157,491
Proceeds from sales of investment securities available for sale	13,336	2,078,436
Available-for-sale securities, gross realized gains	1,074	247,780
Available-for-sale securities, gross realized losses	0	$ 0
Eligible available-for-sale securities, unpledged	37,700,000		$ 89,600,000
Available-for-sale securities pledged as collateral	0		0
Gross unrealized losses	4,624,138		$ 2,229,259
Amortized Cost	161,787,831
Other-than-temporary impairment losses	0
Collateralized mortgage obligations: private-label mortgage securities
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses	85,000
Amortized Cost	$ 2,100,000

Investment Securities - Securit

Investment Securities - Securities Available for Sale in Continuous Unrealized Loss Position for Less Than 12 Months (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	$ 59,625,446	$ 68,504,899
Gross Unrealized Losses	(936,537)	(438,092)
Estimated Fair Value	58,688,909	68,066,807
State and municipal securities
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	1,569,292	556,675
Gross Unrealized Losses	(12,479)	(120)
Estimated Fair Value	1,556,813	556,555
Collateralized loan obligations
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	27,994,494	9,173,224
Gross Unrealized Losses	(120,259)	(43,692)
Estimated Fair Value	27,874,235	9,129,532
Mortgage-backed securities: FHLMC certificates
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	9,123,630	10,721,484
Gross Unrealized Losses	(65,326)	(123,093)
Estimated Fair Value	9,058,304	10,598,391
Mortgage-backed securities: FNMA certificates
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	19,911,981	46,902,868
Gross Unrealized Losses	(701,169)	(270,060)
Estimated Fair Value	19,210,812	46,632,808
Mortgage-backed securities: GNMA certificates
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	1,026,049	1,042,769
Gross Unrealized Losses	(37,304)	(916)
Estimated Fair Value	$ 988,745	1,041,853
Collateralized mortgage obligations: private-label mortgage securities
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost		107,879
Gross Unrealized Losses		(211)
Estimated Fair Value		$ 107,668

Investment Securities - Secur37

Investment Securities - Securities Available for Sale in Continuous Unrealized Loss Position for Greater Than 12 Months (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	$ 81,955,740	$ 63,301,479
Gross Unrealized Losses	(3,687,602)	(1,791,167)
Estimated Fair Value	78,268,138	61,510,312
Mortgage-backed securities: FHLMC certificates
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	9,047,555
Gross Unrealized Losses	(377,474)
Estimated Fair Value	8,670,081
Mortgage-backed securities: FNMA certificates
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	70,810,929	59,666,482
Gross Unrealized Losses	(3,225,008)	(1,656,829)
Estimated Fair Value	67,585,921	58,009,653
Collateralized mortgage obligations: private-label mortgage securities
Available for Sale Securities Continuous Unrealized Loss Position [Line Items]
Amortized Cost	2,097,256	3,634,997
Gross Unrealized Losses	(85,120)	(134,338)
Estimated Fair Value	$ 2,012,136	$ 3,500,659

Loans Receivable - Summary of L

Loans Receivable - Summary of Loans Receivable (Details) - USD ($)	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017		Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,164,306,803		$ 1,161,519,752	[1]
Unamortized loan origination fees, net	(1,284,342)		(1,165,148)	[1]
Allowance for loan losses	(11,496,661)	$ (11,110,903)	(11,078,422)	[1]	$ (10,800,257)	$ (10,504,538)	$ (10,371,416)
Loans receivable, net	1,151,525,800		1,149,276,182	[1]
1-4 family residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	246,591,057		232,040,341
Allowance for loan losses	(701,862)	(777,284)	(663,061)		(736,425)	(789,773)	(779,288)
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	676,399,345		697,070,779
Allowance for loan losses	(8,138,373)	(7,612,059)	(7,820,078)		(7,424,824)	(7,294,255)	(7,346,130)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	102,936,278		103,673,447
Allowance for loan losses	(647,187)	(864,346)	(776,551)		(820,663)	(715,660)	(600,258)
Real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	101,570,279		88,791,799
Allowance for loan losses	(654,793)	(549,349)	(482,665)		(403,381)	(403,180)	(516,556)
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	36,809,844		39,943,386
Allowance for loan losses	$ (203,320)	$ (187,326)	$ (196,037)		$ (232,826)	$ (194,261)	$ (79,140)
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Loans Receivable - Additional I

Loans Receivable - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2018USD ($)category	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)loancategory	Jun. 30, 2017USD ($)loan	Sep. 30, 2017USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
HELOC and 2nd mortgage	$ 44,800,000		$ 44,800,000
Impaired financing receivable, related allowance	$ 1,251,449		$ 1,251,449		$ 48,733
TDR minimum performance period that causes loans to return to accrual status (in months)			6 months
Loan modifications, subsequent default, number of loans | loan			0	0
Loss history period for estimate allowances			7 years
Number of loan loss allowance categories | category	4		4
Net write-offs (recoveries)			$ (768,239)
Provision for loan losses	$ 0	$ 0	(350,000)	$ (900,000)	(900,000)
Loans receivable	1,164,306,803		1,164,306,803		1,161,519,752	[1]
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amortization of fair value discount	2,300,000		2,300,000		4,100,000
Loans receivable	275,800,000		275,800,000		350,500,000
Acquired | Performing Financial Instruments
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net performing loans	260,000,000		260,000,000		333,500,000
Amortization of fair value discount	2,300,000		2,300,000		4,100,000
Accruing loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings, amount	3,900,000	5,000,000	3,900,000	5,000,000	5,000,000
Nonaccrual loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings, amount	373,576	106,739	$ 373,576	106,739
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of loans secured by owner-occupied properties			32.10%
Impaired financing receivable, related allowance	1,199,353		$ 1,199,353		24,299
Provision for loan losses	340,210	31,328	(124,243)	(725,875)
Loans receivable	676,399,345		676,399,345		697,070,779
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable, related allowance	0		0		0
Provision for loan losses	(332,132)	(92,485)	(398,002)	(248,252)
Loans receivable	102,936,278		102,936,278		103,673,447
1-4 family residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable, related allowance	8,020		8,020		24,434
Provision for loan losses	(69,026)	$ (58,133)	84,924	$ (92,932)
Loans receivable	$ 246,591,057		$ 246,591,057		$ 232,040,341
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt service coverage ratio			1.15
Unallocated allowance for loan loss percent			4.00%
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unallocated allowance for loan loss percent			12.00%
Maximum | Home Equity Line of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan to value percentage			90.00%
Maximum | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, term			10 years
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Loans Receivable - Nonaccrual a

Loans Receivable - Nonaccrual and Past Due Loans (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 1,164,306,803	$ 1,161,519,752	[1]
Nonaccruing loans	1,366,754	1,660,438
Acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	275,800,000	350,500,000
Nonaccruing loans	0	888,000
1-4 family residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	246,591,057	232,040,341
Nonaccruing loans	348,150	293,224
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	676,399,345	697,070,779
Nonaccruing loans	771,901	1,327,037
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	102,936,278	103,673,447
Nonaccruing loans	224,157	40,177
Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	101,570,279	88,791,799
Nonaccruing loans	0	0
Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	36,809,844	39,943,386
Nonaccruing loans	22,546	0
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,157,740,999	1,155,094,965
30-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	4,957,408	4,718,126
30-89 days past due | 1-4 family residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,476,122	1,567,688
30-89 days past due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,265,449	1,490,424
30-89 days past due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	113,257	1,000,840
30-89 days past due | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	324,924	0
30-89 days past due | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	777,656	659,174
90 days or greater past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	241,642	46,223
90 days or greater past due | Accruing loans | Acquired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	0	0
90 days or greater past due | 1-4 family residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	154,659	46,223
90 days or greater past due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	0	0
90 days or greater past due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	0	0
90 days or greater past due | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	0	0
90 days or greater past due | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	86,983	0
Total accruing past due loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 5,199,050	$ 4,764,349
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Loans Receivable - Impaired Loa

Loans Receivable - Impaired Loans (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 9,970,291	$ 9,970,291	$ 7,084,548
Unpaid Principal Balance	11,170,341	11,170,341	8,508,281
Related Allowance	1,251,449	1,251,449	48,733
Average Investment in Impaired Loans	10,037,395	10,358,621	7,298,201
Interest Income Recognized	107,708	351,037	294,793
1-4 family residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,051,428	1,051,428	955,522
Unpaid Principal Balance	1,208,242	1,208,242	1,143,831
Related Allowance	8,020	8,020	24,434
Average Investment in Impaired Loans	1,056,993	1,114,914	975,317
Interest Income Recognized	8,254	42,079	33,166
Recorded investment of investments with related allowance	29,999	29,999	24,434
Unpaid principal balance of investments with related allowance	33,905	33,905	25,131
Average investment in impaired loans with related allowance	30,360	31,050	24,858
Interest income recognized on loans with related allowance	0	0	90
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	8,558,786	8,558,786	5,960,208
Unpaid Principal Balance	9,774,957	9,774,957	6,970,943
Related Allowance	1,199,353	1,199,353	24,299
Average Investment in Impaired Loans	8,614,619	8,878,239	6,131,422
Interest Income Recognized	97,047	299,275	259,651
Recorded investment of investments with related allowance	4,487,205	4,487,205	686,520
Unpaid principal balance of investments with related allowance	4,807,777	4,807,777	695,762
Average investment in impaired loans with related allowance	4,508,128	4,710,529	717,892
Interest income recognized on loans with related allowance	50,716	158,980	39,825
Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	224,157	224,157	140,012
Unpaid Principal Balance	48,343	48,343	363,382
Related Allowance	0	0	0
Average Investment in Impaired Loans	228,730	226,492	161,068
Interest Income Recognized	0	2,386	0
Real estate construction
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Allowance	0	0	0
Average Investment in Impaired Loans	0	0	0
Interest Income Recognized	0	0	0
Consumer and other
Financing Receivable, Impaired [Line Items]
Recorded Investment	135,920	135,920	28,806
Unpaid Principal Balance	138,799	138,799	30,125
Related Allowance	44,076	44,076	0
Average Investment in Impaired Loans	137,053	138,976	30,394
Interest Income Recognized	2,407	7,297	$ 1,976
Recorded investment of investments with related allowance	48,937	48,937
Unpaid principal balance of investments with related allowance	51,817	51,817
Average investment in impaired loans with related allowance	49,969	51,360
Interest income recognized on loans with related allowance	$ 437	$ 1,349

Loans Receivable - Troubled Deb

Loans Receivable - Troubled Debt Restructurings (Details)	9 Months Ended
	Jun. 30, 2018USD ($)loan	Jun. 30, 2017USD ($)loan
Accruing loans
Number of Loans | loan	5	9
Pre-Modification Outstanding Recorded Investment	$ 290,191	$ 957,395
Post-Modification Outstanding Recorded Investment	$ 290,191	$ 957,395
Nonaccrual loans
Number of Loans | loan	4	1
Pre-Modification Outstanding Recorded Investment	$ 386,280	$ 32,138
Post-Modification Outstanding Recorded Investment	$ 386,280	$ 32,138
Payment Deferral | 1-4 family residential real estate | Accruing loans
Number of Loans | loan	4	7
Pre-Modification Outstanding Recorded Investment	$ 195,854	$ 441,756
Post-Modification Outstanding Recorded Investment	$ 195,854	$ 441,756
Payment Deferral | 1-4 family residential real estate | Nonaccrual loans
Number of Loans | loan	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0
Payment Deferral | Commercial real estate | Accruing loans
Number of Loans | loan	1	2
Pre-Modification Outstanding Recorded Investment	$ 94,337	$ 515,639
Post-Modification Outstanding Recorded Investment	$ 94,337	$ 515,639
Payment Deferral | Commercial real estate | Nonaccrual loans
Number of Loans | loan	2	0
Pre-Modification Outstanding Recorded Investment	$ 186,813	$ 0
Post-Modification Outstanding Recorded Investment	$ 186,813	$ 0
Payment Deferral | Commercial | Accruing loans
Number of Loans | loan	0
Pre-Modification Outstanding Recorded Investment	$ 0
Post-Modification Outstanding Recorded Investment	$ 0
Payment Deferral | Commercial | Nonaccrual loans
Number of Loans | loan	2
Pre-Modification Outstanding Recorded Investment	$ 199,467
Post-Modification Outstanding Recorded Investment	$ 199,467
Payment Deferral | Consumer and other | Accruing loans
Number of Loans | loan		0
Pre-Modification Outstanding Recorded Investment		$ 0
Post-Modification Outstanding Recorded Investment		$ 0
Payment Deferral | Consumer and other | Nonaccrual loans
Number of Loans | loan		1
Pre-Modification Outstanding Recorded Investment		$ 32,138
Post-Modification Outstanding Recorded Investment		$ 32,138

Loans Receivable - Accretable D

Loans Receivable - Accretable Discount On Acquired Loans (Details) - Impaired loans at acquisition - USD ($)	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 0	$ 462,071
Loan accretion	0	(397,685)
Balance, end of period	$ 0	$ 64,386

Loans Receivable - Acquired Imp

Loans Receivable - Acquired Impaired Loans (Details) - Impaired loans at acquisition - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Schedule of Loan Receivable Outstanding Balances and Related Carrying Amounts for Acquired Impaired Loans [Line Items]
Unpaid principal balance	$ 16,911,270	$ 18,327,905
Carrying amount	$ 15,819,914	$ 16,974,607

Loans Receivable - Risk Grades

Loans Receivable - Risk Grades of Loan Portfolio (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Composition Of Loan Portfolio [Line Items]
Total loans	$ 1,164,306,803	$ 1,161,519,752	[1]
Pass (1-4)
Composition Of Loan Portfolio [Line Items]
Total loans	1,127,143,387	1,115,791,006
Special Mention (5)
Composition Of Loan Portfolio [Line Items]
Total loans	15,257,406	15,052,879
Substandard (6)
Composition Of Loan Portfolio [Line Items]
Total loans	21,906,010	30,675,867
Doubtful (7)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Loss (8)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
1-4 family residential real estate
Composition Of Loan Portfolio [Line Items]
Total loans	246,591,057	232,040,341
1-4 family residential real estate | Pass (1-4)
Composition Of Loan Portfolio [Line Items]
Total loans	243,081,293	230,417,503
1-4 family residential real estate | Special Mention (5)
Composition Of Loan Portfolio [Line Items]
Total loans	788,521	0
1-4 family residential real estate | Substandard (6)
Composition Of Loan Portfolio [Line Items]
Total loans	2,721,243	1,622,838
1-4 family residential real estate | Doubtful (7)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
1-4 family residential real estate | Loss (8)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Commercial real estate
Composition Of Loan Portfolio [Line Items]
Total loans	676,399,345	697,070,779
Commercial real estate | Pass (1-4)
Composition Of Loan Portfolio [Line Items]
Total loans	644,337,423	654,217,207
Commercial real estate | Special Mention (5)
Composition Of Loan Portfolio [Line Items]
Total loans	13,380,351	14,318,249
Commercial real estate | Substandard (6)
Composition Of Loan Portfolio [Line Items]
Total loans	18,681,571	28,535,323
Commercial real estate | Doubtful (7)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Commercial real estate | Loss (8)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Commercial
Composition Of Loan Portfolio [Line Items]
Total loans	102,936,278	103,673,447
Commercial | Pass (1-4)
Composition Of Loan Portfolio [Line Items]
Total loans	101,393,896	102,690,306
Commercial | Special Mention (5)
Composition Of Loan Portfolio [Line Items]
Total loans	1,088,534	494,241
Commercial | Substandard (6)
Composition Of Loan Portfolio [Line Items]
Total loans	453,848	488,900
Commercial | Doubtful (7)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Commercial | Loss (8)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Real estate construction
Composition Of Loan Portfolio [Line Items]
Total loans	101,570,279	88,791,799
Real estate construction | Pass (1-4)
Composition Of Loan Portfolio [Line Items]
Total loans	101,570,279	88,551,410
Real estate construction | Special Mention (5)
Composition Of Loan Portfolio [Line Items]
Total loans	0	240,389
Real estate construction | Substandard (6)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Real estate construction | Doubtful (7)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Real estate construction | Loss (8)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Consumer and other
Composition Of Loan Portfolio [Line Items]
Total loans	36,809,844	39,943,386
Consumer and other | Pass (1-4)
Composition Of Loan Portfolio [Line Items]
Total loans	36,760,496	39,914,580
Consumer and other | Special Mention (5)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Consumer and other | Substandard (6)
Composition Of Loan Portfolio [Line Items]
Total loans	49,348	28,806
Consumer and other | Doubtful (7)
Composition Of Loan Portfolio [Line Items]
Total loans	0	0
Consumer and other | Loss (8)
Composition Of Loan Portfolio [Line Items]
Total loans	$ 0	$ 0
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Loans Receivable - Allowance fo

Loans Receivable - Allowance for Loan Losses (Details) - USD ($)	3 Months Ended		9 Months Ended			12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017	Sep. 30, 2017
Allowance for loan losses:
Beginning balance	$ 11,110,903	$ 10,504,538	$ 11,078,422	[1]	$ 10,371,416	$ 10,371,416
Charge-offs	(27,897)	(73,440)	(528,017)		(226,477)
Recoveries	413,655	369,159	1,296,256		1,555,318
Provision	0	0	(350,000)		(900,000)	(900,000)
Ending balance	11,496,661	10,800,257	11,496,661		10,800,257	11,078,422	[1]
Allowance for loan losses:
Individually evaluated for impairment	1,251,449		1,251,449			48,733
Other loans not individually evaluated	10,245,212		10,245,212			11,029,689
Loans:
Amounts collectively evaluated for impairment	1,138,516,598		1,138,516,598			1,137,460,597
Amounts individually evaluated for impairment	9,970,291		9,970,291			7,084,548
Total loans	1,164,306,803		1,164,306,803			1,161,519,752	[1]
Receivables Acquired with Deteriorated Credit Quality
Loans:
Amounts related to loans acquired with deteriorated credit quality	15,819,914		15,819,914			16,974,607
1-4 family residential real estate
Allowance for loan losses:
Beginning balance	777,284	789,773	663,061		779,288	779,288
Charge-offs	(23,928)	0	(193,298)		(92,136)
Recoveries	17,532	4,785	147,175		142,205
Provision	(69,026)	(58,133)	84,924		(92,932)
Ending balance	701,862	736,425	701,862		736,425	663,061
Allowance for loan losses:
Individually evaluated for impairment	8,020		8,020			24,434
Other loans not individually evaluated	693,842		693,842			638,627
Loans:
Amounts collectively evaluated for impairment	243,877,700		243,877,700			229,359,838
Amounts individually evaluated for impairment	1,051,428		1,051,428			955,522
Total loans	246,591,057		246,591,057			232,040,341
1-4 family residential real estate | Receivables Acquired with Deteriorated Credit Quality
Loans:
Amounts related to loans acquired with deteriorated credit quality	1,661,929		1,661,929			1,724,981
Commercial real estate
Allowance for loan losses:
Beginning balance	7,612,059	7,294,255	7,820,078		7,346,130	7,346,130
Charge-offs	0	(63,554)	(194,204)		(112,651)
Recoveries	186,104	162,795	636,742		917,220
Provision	340,210	31,328	(124,243)		(725,875)
Ending balance	8,138,373	7,424,824	8,138,373		7,424,824	7,820,078
Allowance for loan losses:
Individually evaluated for impairment	1,199,353		1,199,353			24,299
Other loans not individually evaluated	6,939,020		6,939,020			7,795,779
Loans:
Amounts collectively evaluated for impairment	656,852,264		656,852,264			679,367,829
Amounts individually evaluated for impairment	8,558,786		8,558,786			5,960,208
Total loans	676,399,345		676,399,345			697,070,779
Commercial real estate | Receivables Acquired with Deteriorated Credit Quality
Loans:
Amounts related to loans acquired with deteriorated credit quality	10,988,295		10,988,295			11,742,742
Commercial
Allowance for loan losses:
Beginning balance	864,346	715,660	776,551		600,258	600,258
Charge-offs	0	0	(128,926)		0
Recoveries	114,973	197,488	397,564		468,657
Provision	(332,132)	(92,485)	(398,002)		(248,252)
Ending balance	647,187	820,663	647,187		820,663	776,551
Allowance for loan losses:
Individually evaluated for impairment	0		0			0
Other loans not individually evaluated	647,187		647,187			776,551
Loans:
Amounts collectively evaluated for impairment	99,542,431		99,542,431			100,026,551
Amounts individually evaluated for impairment	224,157		224,157			140,012
Total loans	102,936,278		102,936,278			103,673,447
Commercial | Receivables Acquired with Deteriorated Credit Quality
Loans:
Amounts related to loans acquired with deteriorated credit quality	3,169,690		3,169,690			3,506,884
Real estate construction
Allowance for loan losses:
Beginning balance	549,349	403,180	482,665		516,556	516,556
Charge-offs	0	0	0		0
Recoveries	0	0	0		0
Provision	105,444	201	172,128		(113,175)
Ending balance	654,793	403,381	654,793		403,381	482,665
Allowance for loan losses:
Individually evaluated for impairment	0		0			0
Other loans not individually evaluated	654,793		654,793			482,665
Loans:
Amounts collectively evaluated for impairment	101,570,279		101,570,279			88,791,799
Amounts individually evaluated for impairment	0		0			0
Total loans	101,570,279		101,570,279			88,791,799
Real estate construction | Receivables Acquired with Deteriorated Credit Quality
Loans:
Amounts related to loans acquired with deteriorated credit quality	0		0			0
Consumer and other
Allowance for loan losses:
Beginning balance	187,326	194,261	196,037		79,140	79,140
Charge-offs	(3,969)	(9,886)	(11,589)		(21,690)
Recoveries	95,046	4,091	114,775		27,236
Provision	(75,083)	44,360	(95,903)		148,140
Ending balance	203,320	232,826	203,320		232,826	196,037
Allowance for loan losses:
Individually evaluated for impairment	44,076		44,076			0
Other loans not individually evaluated	159,244		159,244			196,037
Loans:
Amounts collectively evaluated for impairment	36,673,924		36,673,924			39,914,580
Amounts individually evaluated for impairment	135,920		135,920			28,806
Total loans	36,809,844		36,809,844			39,943,386
Consumer and other | Receivables Acquired with Deteriorated Credit Quality
Loans:
Amounts related to loans acquired with deteriorated credit quality	0		0			0
Unallocated
Allowance for loan losses:
Beginning balance	1,120,539	1,107,409	1,140,030		1,050,044	1,050,044
Charge-offs	0	0	0		0
Recoveries	0	0	0		0
Provision	30,587	74,729	11,096		132,094
Ending balance	1,151,126	$ 1,182,138	1,151,126		$ 1,182,138	1,140,030
Allowance for loan losses:
Individually evaluated for impairment	0		0			0
Other loans not individually evaluated	$ 1,151,126		$ 1,151,126			$ 1,140,030
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Income Per Share - Schedule of

Income Per Share - Schedule of Income Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net income	$ 4,646,113	$ 3,513,850	$ 14,292,625	$ 11,876,312
Denominator:
Weighted average common shares outstanding (in shares)	14,544,417	14,353,082	14,490,993	14,293,859
Common stock equivalents (in shares)	868,738	903,541	772,535	903,541
Diluted shares (in shares)	15,413,155	15,256,623	15,263,528	15,197,400
Net income per share:
Basic (in dollars per share)	$ 0.32	$ 0.24	$ 0.99	$ 0.83
Diluted (in dollars per share)	$ 0.30	$ 0.23	$ 0.94	$ 0.78

Income Per Share - Additional I

Income Per Share - Additional Information (Details) - shares	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number diluted shares outstanding adjustment (in shares)	868,738	903,541	772,535	903,541
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number diluted shares outstanding adjustment (in shares)	741,919	696,095	652,475	696,095
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0	0
Nonvested | Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number diluted shares outstanding adjustment (in shares)	126,819	207,446	120,060	207,446

Employee Benefits - Additional

Employee Benefits - Additional Information (Details) - USD ($)	Apr. 08, 2013	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of stock, shares issued (in shares)	1.2471
Stock option expense		$ 240,655	$ 248,337
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life at date of grant		96 months
Shares issued or retired upon exercise of the option granted under the plan (in shares)		258,840
Shares outstanding (in shares)		1,306,294		1,565,810
Options granted in period (in shares)		20,000
Options outstanding, including out of money options (in shares)		1,306,294
Intrinsic value of stock options outstanding and exercisable		$ 18,097,949
Options exercisable, end of period (in shares)		1,052,527
Intrinsic value of all stock options exercisable		$ 14,794,107
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock awards - Vested (in shares)		73,315
Unvested restricted stock awards - Cancelled or expired (in shares)		15,000
2002 Stock Option Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock (not less than)		100.00%
Expected life at date of grant		10 years
Number of shares authorized for grant (in shares)		882,876
Shares issued or retired upon exercise of the option granted under the plan (in shares)		358,596
Shares outstanding (in shares)		362,830
Number of shares available for grant (in shares)		0
Number of shares vested (in shares)		631,004
Number of shares vested during period (in shares)		12,221
2002 Stock Option Plan | Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
2002 Stock Option Plan | Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		5 years
2013 Equity Incentive Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock (not less than)		100.00%
Expected life at date of grant		10 years
Number of shares authorized for grant (in shares)		1,428,943
Shares issued or retired upon exercise of the option granted under the plan (in shares)		92,486
Shares outstanding (in shares)		943,464
Number of shares available for grant (in shares)		393,263
Number of shares vested (in shares)		793,540
Number of shares vested during period (in shares)		197,935
2013 Equity Incentive Plan | Stock Options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
2013 Equity Incentive Plan | Stock Options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		5 years
2013 Equity Incentive Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grant (in shares)		571,577
Shares outstanding (in shares)		374,092
Number of shares available for grant (in shares)		197,485
Options granted in period (in shares)		22,500
Unvested restricted stock awards - Vested (in shares)		73,315

Employee Benefits - Summary of

Employee Benefits - Summary of Assumptions Used in Valuation of Options Awarded (Details) - Stock Options	9 Months Ended
	Jun. 30, 2018$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.90%
Dividend yield	1.76%
Expected life at date of grant (months)	96 months
Volatility	18.87%
Weighted average grant-date fair value (in dollars per share)	$ 2.38

Employee Benefits - Stock Optio

Employee Benefits - Stock Option Activity (Details) - Stock Options - $ / shares	9 Months Ended	12 Months Ended
	Jun. 30, 2018	Sep. 30, 2017
Shares
Options outstanding, beginning of period (in shares)	1,565,810
Options, exercised in period (in shares)	(258,840)
Options forfeited in period (in shares)	(20,676)
Options granted in period (in shares)	20,000
Options outstanding, end of period (in shares)	1,306,294	1,565,810
Options exercisable, end of period (in shares)	1,052,527
Weighted average exercise price/share
Options outstanding, weighted average exercise price, beginning of period (in dollars per share)	$ 10.14
Options exercised in period, weighted average exercise price (in dollars per share)	9.35
Options forfeited in period, weighted average exercise price (in dollars per share)	16.74
Options granted in period, weighted average exercise price (in dollars per share)	17.02
Options outstanding, weighted average exercise price, end of period (in dollars per share)	10.30	$ 10.14
Options exercisable, weighted average exercise price, end of period (in dollars per share)	$ 10.09
Weighted average remaining life (years)
Options outstanding, weighted average remaining contractual term (in years)	4 years	5 years
Options exercised, weighted average remaining life (in years)	3 years
Options forfeited, weighted average remaining life (in years)	10 years
Options granted, weighted average remaining life (in years)	10 years
Options exercisable, weighted average remaining contractual term, end of period (in years)	4 years

Employee Benefits - Stock Opt52

Employee Benefits - Stock Options Outstanding (Details) - Stock Options - $ / shares	9 Months Ended	12 Months Ended
	Jun. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	1,306,294	1,565,810
Remaining contractual life in years	4 years	5 years
Exercise price per share (in dollars per share)	$ 10.30	$ 10.14
Exercise Price $8.82
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	213,344
Remaining contractual life in years	1 year
Exercise price per share (in dollars per share)	$ 8.82
Exercise Price $8.18
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	105,996
Remaining contractual life in years	2 years
Exercise price per share (in dollars per share)	$ 8.18
Exercise Price $7.22
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	40,996
Remaining contractual life in years	2 years
Exercise price per share (in dollars per share)	$ 7.22
Exercise Price $7.79
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	2,494
Remaining contractual life in years	4 years
Exercise price per share (in dollars per share)	$ 7.79
Exercise Price $10.89
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	889,464
Remaining contractual life in years	6 years
Exercise price per share (in dollars per share)	$ 10.89
Exercise Price $12.66
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	30,000
Remaining contractual life in years	7 years
Exercise price per share (in dollars per share)	$ 12.66
Exercise Price $13.16
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	3,000
Remaining contractual life in years	8 years
Exercise price per share (in dollars per share)	$ 13.16
Exercise Price $13.31
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	18,000
Remaining contractual life in years	8 years
Exercise price per share (in dollars per share)	$ 13.31
Exercise Price $13.30
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	3,000
Remaining contractual life in years	8 years
Exercise price per share (in dollars per share)	$ 13.30

Employee Benefits - Restricted

Employee Benefits - Restricted Stock Award (Details) - Restricted Stock	9 Months Ended
	Jun. 30, 2018$ / sharesshares
Shares
Unvested restricted stock awards - beginning balance (in shares) | shares	150,547
Unvested restricted stock awards - Granted (in shares) | shares	22,500
Unvested restricted stock awards - Vested (in shares) | shares	73,315
Unvested restricted stock awards - Cancelled or expired (in shares) | shares	15,000
Unvested restricted stock awards - ending balance (in shares) | shares	84,732
Weighted average grant date fair value per award
Unvested restricted stock awards - Weighted average grant date fair value - beginning balance (in dollars per share) | $ / shares	$ 11.20
Unvested restricted stock awards - Granted - Weighted average grant date fair value (in dollars per share) | $ / shares	17.48
Unvested restricted stock awards - Vested - Weighted average grant date fair value (in dollars per share) | $ / shares	11.02
Unvested restricted stock awards - Cancelled or expired - Weighted average grant date fair value (in dollars per share) | $ / shares	17.02
Unvested restricted stock awards - Weighted average grant date fair value - ending balance (in dollars per share) | $ / shares	$ 11.99

Commitments and Contingent Li54

Commitments and Contingent Liabilities (Details) $ in Millions	Jul. 18, 2018complaintlawsuit	Jun. 30, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Commitment to extend credit | $		$ 249.4
Subsequent Event | United States District Court for the District of Maryland | Pending Litigation | Violations of Securities Laws and SEC Rules in the Filing of the Company's Proxy Statement/Prospectus
Loss Contingencies [Line Items]
Number of class action complaints (complaint)	2
Number of lawsuits seeking to enjoin stockholder vote with respect to merger (lawsuit) | lawsuit	1
Subsequent Event | United States District Court for the District of Maryland | Pending Litigation | Violations of Securities Laws and SEC Rules in the Filing of the Company's Proxy Statement/Prospectus | CenterState Bank Corporation
Loss Contingencies [Line Items]
Number of class action complaints (complaint)	1

Fair Value of Financial Instr55

Fair Value of Financial Instruments and Fair Value Measurement - Additional Information (Details)	9 Months Ended
	Jun. 30, 2018USD ($)branch	Sep. 30, 2017USD ($)
Fair Value Disclosures [Abstract]
Number of former branch offices | branch	1
1-4 family residential real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other real estate owned, foreclosed assets	$ 228,000	$ 224,000
Consumer mortgage loans collateralized by residential real estate, in process of foreclosure	$ 0	$ 195,000

Fair Value of Financial Instr56

Fair Value of Financial Instruments and Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Assets
Investment securities available for sale	$ 157,232,405	$ 183,789,821	[1]
Mortgage servicing rights	1,547,380	1,319,725
Assets held for sale	112,300	752,300
Total recurring assets at fair value	158,892,085	185,861,846
State and municipal securities
Assets
Investment securities available for sale	1,556,813	2,251,815
Collateralized loan obligations
Assets
Investment securities available for sale	43,724,762	40,677,676
Mortgage-backed securities: FHLMC certificates
Assets
Investment securities available for sale	17,728,386	21,755,122
Mortgage-backed securities: FNMA certificates
Assets
Investment securities available for sale	90,849,240	112,990,819
Mortgage-backed securities: GNMA certificates
Assets
Investment securities available for sale	988,744	2,506,063
Private-label mortgage securities: investment grade
Assets
Investment securities available for sale	372,324	591,443
Private-label mortgage securities: split rating
Assets
Investment securities available for sale	1,486,684	2,249,670
Private-label mortgage securities: non-investment grade
Assets
Investment securities available for sale	525,452	767,213
Quoted Prices in Active Markets (Level 1)
Assets
Investment securities available for sale	0	0
Mortgage servicing rights	0	0
Assets held for sale	0	0
Total recurring assets at fair value	0	0
Quoted Prices in Active Markets (Level 1) | State and municipal securities
Assets
Investment securities available for sale	0	0
Quoted Prices in Active Markets (Level 1) | Collateralized loan obligations
Assets
Investment securities available for sale	0	0
Quoted Prices in Active Markets (Level 1) | Mortgage-backed securities: FHLMC certificates
Assets
Investment securities available for sale	0	0
Quoted Prices in Active Markets (Level 1) | Mortgage-backed securities: FNMA certificates
Assets
Investment securities available for sale	0	0
Quoted Prices in Active Markets (Level 1) | Mortgage-backed securities: GNMA certificates
Assets
Investment securities available for sale	0	0
Quoted Prices in Active Markets (Level 1) | Private-label mortgage securities: investment grade
Assets
Investment securities available for sale	0	0
Quoted Prices in Active Markets (Level 1) | Private-label mortgage securities: split rating
Assets
Investment securities available for sale	0	0
Quoted Prices in Active Markets (Level 1) | Private-label mortgage securities: non-investment grade
Assets
Investment securities available for sale	0	0
Significant Other Observable Inputs (Level 2)
Assets
Investment securities available for sale	157,232,405	183,789,821
Mortgage servicing rights	1,547,380	1,319,725
Assets held for sale	0	0
Total recurring assets at fair value	158,779,785	185,109,546
Significant Other Observable Inputs (Level 2) | State and municipal securities
Assets
Investment securities available for sale	1,556,813	2,251,815
Significant Other Observable Inputs (Level 2) | Collateralized loan obligations
Assets
Investment securities available for sale	43,724,762	40,677,676
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: FHLMC certificates
Assets
Investment securities available for sale	17,728,386	21,755,122
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: FNMA certificates
Assets
Investment securities available for sale	90,849,240	112,990,819
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities: GNMA certificates
Assets
Investment securities available for sale	988,744	2,506,063
Significant Other Observable Inputs (Level 2) | Private-label mortgage securities: investment grade
Assets
Investment securities available for sale	372,324	591,443
Significant Other Observable Inputs (Level 2) | Private-label mortgage securities: split rating
Assets
Investment securities available for sale	1,486,684	2,249,670
Significant Other Observable Inputs (Level 2) | Private-label mortgage securities: non-investment grade
Assets
Investment securities available for sale	525,452	767,213
Significant Unobservable Inputs (Level 3)
Assets
Investment securities available for sale	0	0
Mortgage servicing rights	0	0
Assets held for sale	112,300	752,300
Total recurring assets at fair value	112,300	752,300
Significant Unobservable Inputs (Level 3) | State and municipal securities
Assets
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Collateralized loan obligations
Assets
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: FHLMC certificates
Assets
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: FNMA certificates
Assets
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Mortgage-backed securities: GNMA certificates
Assets
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Private-label mortgage securities: investment grade
Assets
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Private-label mortgage securities: split rating
Assets
Investment securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Private-label mortgage securities: non-investment grade
Assets
Investment securities available for sale	$ 0	$ 0
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Fair Value of Financial Instr57

Fair Value of Financial Instruments and Fair Value Measurement - Level 3 Unobservable Input Reconciliation (Details) - Assets held for sale - USD ($)	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	$ 752,300	$ 975,300
Sales	(640,000)	(263,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Valuation Gain (Loss) Included in Earnings	0	0
Fair value, ending balance	$ 112,300	$ 712,300

Fair Value of Financial Instr58

Fair Value of Financial Instruments and Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Impaired loans:
Impaired loans	$ 1,538,957	$ 2,326,132
Other real estate owned	227,531	1,437,345	[1]
Quoted Prices in Active Markets (Level 1)
Impaired loans:
Impaired loans	0	0
Other real estate owned	0	0
Significant Other Observable Inputs (Level 2)
Impaired loans:
Impaired loans	0	0
Other real estate owned	0	0
Significant Unobservable Inputs (Level 3)
Impaired loans:
Impaired loans	1,538,957	2,326,132
Other real estate owned	$ 227,531	$ 1,437,345
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Fair Value of Financial Instr59

Fair Value of Financial Instruments and Fair Value Measurement - Quantitative Information about Level 3 Fair Value Measurements (Details)	Jun. 30, 2018USD ($)	Sep. 30, 2017USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 1,538,957	$ 2,326,132
Other real estate owned	227,531	1,437,345	[1]
Assets held for sale	$ 112,300	$ 752,300
Minimum | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans, Weighted Average Discount	0.23
Other Real Estate Owned, Weighted Average Discount	0.09
Assets Held-for-sale, Weighted Average Discount	0
Maximum | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans, Weighted Average Discount	0.66
Other Real Estate Owned, Weighted Average Discount	0.20
Assets Held-for-sale, Weighted Average Discount	0.53
Weighted Average | Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired Loans, Weighted Average Discount	0.32
Other Real Estate Owned, Weighted Average Discount	0.11
Assets Held-for-sale, Weighted Average Discount	0.30
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Fair Value of Financial Instr60

Fair Value of Financial Instruments and Fair Value Measurement - Estimated Fair Value of On-Balance Sheet Financial Instruments (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017		Jun. 30, 2017	Sep. 30, 2016
Financial assets:
Cash and cash equivalents - carrying value	$ 170,898,878	$ 152,338,389	[1]	$ 120,144,014	$ 91,849,499
Cash and cash equivalents - fair value	170,898,878	152,338,389
Certificates of deposit held at other financial institutions	4,027,270	7,514,630	[1]
Investment securities available for sale	157,232,405	183,789,821	[1]
FHLB stock - carrying value	4,075,200	4,054,400	[1]
FHLB stock - fair value	4,075,200	4,054,400
Restricted securities, at cost	279,000	279,000	[1]
Loans receivable, net - carrying value	1,151,525,800	1,149,276,182	[1]
Loans receivable, net - fair value	1,140,603,407	1,146,902,727
Loans held for sale - carrying value	1,965,657	1,961,185	[1]
Loans held for sale - fair value	1,998,594	1,998,988
Mortgage servicing rights	1,547,380	1,319,725
Assets held for sale	112,300	752,300
Accrued interest and dividends receivable - carrying value	4,354,702	4,197,708	[1]
Accrued interest and dividends receivable - fair value	4,354,702	4,197,708
Financial liabilities:
Deposits - carrying value	1,317,738,045	1,339,143,287	[1]
Deposits - fair value	1,319,365,403	1,342,831,689
FHLB advances - carrying value	60,011,100	60,023,100
FHLB advances - fair value	59,184,249	61,073,866
Accrued interest payable - carrying value	572,463	704,630
Accrued interest payable - fair value	572,463	704,630
Quoted Prices in Active Markets (Level 1)
Financial assets:
Cash and cash equivalents - fair value	170,898,878	152,338,389
Investment securities available for sale	0	0
FHLB stock - fair value	0	0
Loans receivable, net - fair value	0	0
Loans held for sale - fair value	0	0
Mortgage servicing rights	0	0
Assets held for sale	0	0
Accrued interest and dividends receivable - fair value	0	0
Financial liabilities:
Deposits - fair value	0	0
FHLB advances - fair value	0	0
Accrued interest payable - fair value	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents - fair value	0	0
Investment securities available for sale	157,232,405	183,789,821
FHLB stock - fair value	4,075,200	4,054,400
Loans receivable, net - fair value	0	0
Loans held for sale - fair value	1,998,594	1,998,988
Mortgage servicing rights	1,547,380	1,319,725
Assets held for sale	0	0
Accrued interest and dividends receivable - fair value	678,583	661,335
Financial liabilities:
Deposits - fair value	1,319,365,403	1,342,831,689
FHLB advances - fair value	59,184,249	61,073,866
Accrued interest payable - fair value	572,463	704,630
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents - fair value	0	0
Investment securities available for sale	0	0
FHLB stock - fair value	0	0
Loans receivable, net - fair value	1,140,603,407	1,146,902,727
Loans held for sale - fair value	0	0
Mortgage servicing rights	0	0
Assets held for sale	112,300	752,300
Accrued interest and dividends receivable - fair value	3,676,119	3,536,373
Financial liabilities:
Deposits - fair value	0	0
FHLB advances - fair value	0	0
Accrued interest payable - fair value	0	0
Reported Value Measurement
Financial assets:
Certificates of deposit held at other financial institutions	4,027,270	7,514,630
Investment securities available for sale	157,232,405	183,789,821
Restricted securities, at cost	279,000	279,000
Mortgage servicing rights	1,547,380	1,319,725
Assets held for sale	112,300	752,300
Financial liabilities:
Floating rate junior subordinated debt	6,827,470	6,724,646
Estimate of Fair Value Measurement
Financial assets:
Certificates of deposit held at other financial institutions	4,027,270	7,514,630
Investment securities available for sale	157,232,405	183,789,821
Restricted securities, at cost	279,000	279,000
Mortgage servicing rights	1,547,380	1,319,725
Assets held for sale	112,300	752,300
Financial liabilities:
Floating rate junior subordinated debt	6,827,470	6,724,646
Estimate of Fair Value Measurement | Quoted Prices in Active Markets (Level 1)
Financial assets:
Certificates of deposit held at other financial institutions	0	0
Investment securities available for sale	0	0
Restricted securities, at cost	0	0
Mortgage servicing rights	0	0
Assets held for sale	0	0
Financial liabilities:
Floating rate junior subordinated debt	0	0
Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Financial assets:
Certificates of deposit held at other financial institutions	4,027,270	7,514,630
Investment securities available for sale	157,232,405	183,789,821
Restricted securities, at cost	279,000	279,000
Mortgage servicing rights	1,547,380	1,319,725
Assets held for sale	0	0
Financial liabilities:
Floating rate junior subordinated debt	6,827,470	6,724,646
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Financial assets:
Certificates of deposit held at other financial institutions	0	0
Investment securities available for sale	0	0
Restricted securities, at cost	0	0
Mortgage servicing rights	0	0
Assets held for sale	112,300	752,300
Financial liabilities:
Floating rate junior subordinated debt	$ 0	$ 0
[1]	Financial information at September 30, 2017 has been derived from audited financial statements.

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Income Tax Examination [Line Items]
Net deferred tax assets	$ 3,876,928	$ 3,876,928		$ 5,970,282
Tax Cuts and Jobs Act of 2017, discrete tax expense	$ 40,000	$ 1,500,000
Effective tax rate	30.94%	34.49%
Restatement Adjustment
Income Tax Examination [Line Items]
Current tax receivable	$ 1,400,000	$ 1,400,000
Forecast
Income Tax Examination [Line Items]
Blended federal statutory tax rate			24.50%
Effective tax rate			33.01%

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Jun. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Gross deferred tax assets	$ 7,320,418	$ 9,709,150
Gross deferred tax liabilities	3,443,490	3,738,868
Net deferred tax assets	$ 3,876,928	$ 5,970,282

Income Taxes -Effective Income

Income Taxes -Effective Income Tax Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Amount
Tax expense before one-time charges			$ 6,021,258
Revaluation of net deferred tax asset			1,504,675
Total	$ 2,081,428	$ 2,015,909	$ 7,525,933	$ 6,897,581
Percentage of Income Before Taxes
Tax expense before one-time charges			27.60%
Revaluation of net deferred tax asset			6.89%
Total	30.94%		34.49%