Capitol Federal Financial (CFFN) 10-Q 9 Aug 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Jun. 30, 2018	Aug. 03, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	Capitol Federal Financial Inc
Trading Symbol	cffn
Entity Central Index Key	1,490,906
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		138,263,635

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
ASSETS:
Cash and cash equivalents (includes interest-earning deposits of $174,490 and $340,748)	$ 182,078	$ 351,659
Securities:
Available-for-sale (AFS), at estimated fair value (amortized cost of $556,257 and $410,541)	555,361	415,831
Held-to-maturity (HTM), at amortized cost (estimated fair value of $654,965 and $833,009)	664,522	827,738
Loans receivable, net (allowance for credit losses (ACL) of $8,344 and $8,398)	7,239,384	7,195,071
Federal Home Loan Bank Topeka (FHLB) stock, at cost	100,694	100,954
Premises and equipment, net	85,604	84,818
Other assets	221,094	216,845
TOTAL ASSETS	9,048,737	9,192,916
LIABILITIES:
Deposits	5,323,083	5,309,868
FHLB borrowings	2,174,816	2,173,808
Repurchase agreements	100,000	200,000
Advance payments by borrowers for taxes and insurance	39,700	63,749
Income taxes payable, net	0	530
Deferred income tax liabilities, net	18,525	24,458
Accounts payable and accrued expenses	51,288	52,190
Total liabilities	7,707,412	7,824,603
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value; 100,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock, $.01 par value; 1,400,000,000 shares authorized, 138,256,735 and 138,223,835 shares issued and outstanding as of June 30, 2018 and September 30, 2017, respectively	1,383	1,382
Additional paid-in capital	1,168,325	1,167,368
Unearned compensation, Employee Stock Ownership Plan (ESOP)	(36,756)	(37,995)
Retained earnings	204,610	234,640
Accumulated other comprehensive income (AOCI), net of tax	3,763	2,918
Total stockholders' equity	1,341,325	1,368,313
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 9,048,737	$ 9,192,916

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Statement of Financial Position [Abstract]
Interest-earning deposits	$ 174,490	$ 340,748
Available-for-sale securities, amortized cost	556,257	410,541
Held-to-maturity securities, estimated fair value	654,965	833,009
Loans receivable, allowance for credit losses	$ 8,344	$ 8,398
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,400,000,000	1,400,000,000
Common stock, shares issued	138,256,735	138,223,835
Common stock, shares outstanding	138,256,735	138,223,835

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
INTEREST AND DIVIDEND INCOME:
Loans receivable	$ 64,893	$ 64,013	$ 193,276	$ 189,064
Cash and cash equivalents	7,221	5,619	22,230	12,720
Mortgage-backed securities (MBS)	5,921	5,821	16,563	18,374
FHLB stock	2,819	3,114	9,115	9,153
Investment securities	1,307	1,063	3,395	3,301
Total interest and dividend income	82,161	79,630	244,579	232,612
INTEREST EXPENSE:
FHLB borrowings	18,501	17,884	55,190	50,772
Deposits	13,587	10,895	38,028	31,655
Repurchase agreements	640	1,487	2,665	4,461
Total interest expense	32,728	30,266	95,883	86,888
NET INTEREST INCOME	49,433	49,364	148,696	145,724
PROVISION FOR CREDIT LOSSES	0	0	0	0
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	49,433	49,364	148,696	145,724
NON-INTEREST INCOME:
Income from bank-owned life insurance (BOLI)	510	573	1,320	1,669
Other non-interest income	999	1,055	3,345	3,509
Total non-interest income	5,424	5,460	16,215	16,301
NON-INTEREST EXPENSE:
Salaries and employee benefits	11,936	11,210	33,631	32,388
Information technology and related expense	3,363	2,922	10,316	8,524
Occupancy, net	2,787	2,659	8,391	8,098
Deposit and loan transaction costs	1,437	1,304	4,157	3,918
Regulatory and outside services	1,628	1,383	3,919	3,994
Advertising and promotional	1,490	1,322	3,512	3,275
Federal insurance premium	813	879	2,512	2,651
Office supplies and related expense	455	492	1,339	1,470
Other non-interest expense	602	474	2,368	1,861
Total non-interest expense	24,511	22,645	70,145	66,179
INCOME BEFORE INCOME TAX EXPENSE	30,346	32,179	94,766	95,846
INCOME TAX EXPENSE	7,974	10,809	17,228	32,311
NET INCOME	$ 22,372	$ 21,370	$ 77,538	$ 63,535
Basic earnings per share (EPS)	$ 0.17	$ 0.16	$ 0.58	$ 0.47
Diluted EPS	0.17	0.16	0.58	0.47
Dividends declared per share	$ 0.34	$ 0.34	$ 0.80	$ 0.80
Basic weighted average common shares	134,484,240	134,253,690	134,428,280	134,004,281
Diluted weighted average common shares	134,529,953	134,359,770	134,490,555	134,189,758
Deposit Account [Member]
NON-INTEREST INCOME:
Retail fees and charges	$ 3,915	$ 3,832	$ 11,550	$ 11,123

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	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	$ 22,372	$ 21,370	$ 77,538	$ 63,535
Other comprehensive income (loss), net of tax:
Changes in unrealized gains (losses) on AFS securities, net of taxes of $437, $345, $1,756 and $1,374	(1,366)	(567)	(4,430)	(2,260)
Changes in unrealized gains (losses) on cash flow hedges, net of taxes of $9, $0, $(1,858) and $0	(30)	0	4,608	0
Comprehensive income	$ 20,976	$ 20,803	$ 77,716	$ 61,275

Consolidated Statements Of Com6

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Changes in unrealized gains (losses) on AFS securities, deferred income taxes	$ (437)	$ (345)	$ (1,756)	$ (1,374)
Changes in unrealized gains (losses) on cash flow hedges, deferred income taxes	$ (9)	$ 0	$ 1,858	$ 0

Consolidated Statements Of Stoc

Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Unearned Compensation ESOP [Member]	Retained Earnings [Member]	AOCI [Member]
Balance at Sep. 30, 2016	$ 1,392,964	$ 1,375	$ 1,156,855	$ (39,647)	$ 268,466	$ 5,915
Net income	63,535				63,535
Other comprehensive income (loss), net of tax	(2,260)					(2,260)
ESOP activity, net	1,860		621	1,239
Restricted stock activity, net	51		51
Stock-based compensation	419		419
Stock options exercised	8,969	7	8,962
Cash dividends to stockholders	(106,552)				(106,552)
Balance at Jun. 30, 2017	1,358,986	1,382	1,166,908	(38,408)	225,449	3,655
Balance at Sep. 30, 2017	1,368,313	1,382	1,167,368	(37,995)	234,640	2,918
Net income	77,538				77,538
Other comprehensive income (loss), net of tax	178					178
Reclassification of certain tax effects related to adoption of Accounting Standards Update (ASU) 2018-02	0				(667)	667
ESOP activity, net	1,649		410	1,239
Stock-based compensation	280		280
Cumulative effect of adopting ASU 2016-09	0		19		(19)
Stock options exercised	249	1	248
Cash dividends to stockholders	(106,882)				(106,882)
Balance at Jun. 30, 2018	$ 1,341,325	$ 1,383	$ 1,168,325	$ (36,756)	$ 204,610	$ 3,763

Consolidated Statements Of Sto8

Consolidated Statements Of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends to stockholders	$ 0.34	$ 0.34	$ 0.80	$ 0.80

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 77,538	$ 63,535
Adjustments to reconcile net income to net cash provided by operating activities:
FHLB stock dividends	(9,115)	(9,153)
Originations of loans receivable held-for-sale (LHFS)	(777)	0
Proceeds from sales of LHFS	16,423	0
Amortization and accretion of premiums and discounts on securities	2,478	3,487
Depreciation and amortization of premises and equipment	6,275	5,784
Amortization of deferred amounts related to FHLB advances, net	1,008	1,083
Common stock committed to be released for allocation - ESOP	1,649	1,860
Stock-based compensation	280	419
Changes in deferred income tax liabilities, net	(6,038)	0
Changes in cash collateral received from derivative counterparty, net	6,071	0
Changes in:
Other assets, net	444	34
Income taxes payable, net	(531)	1,672
Accounts payable and accrued expenses	(5,643)	(11,612)
Net cash provided by operating activities	90,062	57,109
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of AFS securities	(312,285)	(37,425)
Proceeds from calls, maturities and principal reductions of AFS securities	164,446	108,170
Proceeds from calls, maturities and principal reductions of HTM securities	160,792	206,378
Proceeds from sale of AFS securities	2,078	0
Proceeds from the redemption of FHLB stock	195,246	292,400
Purchase of FHLB stock	(185,871)	(274,316)
Net increase in loans receivable	(61,681)	(284,728)
Purchase of premises and equipment	(7,062)	(6,509)
Proceeds from sale of other real estate owned (OREO)	2,161	4,297
Net cash (used in) provided by investing activities	(42,176)	8,267
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(106,882)	(106,552)
Net change in deposits	13,215	103,667
Proceeds from borrowings	14,900,100	2,100,100
Repayments on borrowings	(15,000,100)	(2,500,100)
Net change in short-term borrowings	0	200,000
Change in advance payments by borrowers for taxes and insurance	(24,049)	(22,975)
Stock options exercised	249	8,642
Excess tax benefits from stock options	0	327
Net cash used in financing activities	(217,467)	(216,891)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(169,581)	(151,515)
CASH AND CASH EQUIVALENTS:
Beginning of period	351,659	281,764
End of period	182,078	130,249
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Loans transferred to LHFS	$ 15,814	$ 0

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	9 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation - The consolidated financial statements include the accounts of Capitol Federal® Financial, Inc. (the "Company") and its wholly-owned subsidiary, Capitol Federal Savings Bank (the "Bank"). The Bank has a wholly-owned subsidiary, Capitol Funds, Inc. Capitol Funds, Inc. has a wholly-owned subsidiary, Capitol Federal Mortgage Reinsurance Company. All intercompany accounts and transactions have been eliminated in consolidation. The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. These statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended September 30, 2017 , filed with the Securities and Exchange Commission ("SEC"). Interim results are not necessarily indicative of results for a full year. Net Presentation of Cash Flows Related to Borrowings - During the current fiscal year, the Bank entered into certain FHLB advances with contractual maturities of 90 days or less. Cash flows related to these advances are reported on a net basis in the consolidated statements of cash flows. Income Taxes - The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred income tax assets and liabilities are recognized for the tax consequences of temporary differences between the financial statement carrying amounts and the tax basis of existing assets and liabilities. 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. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Recent Accounting Pronouncements - In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, Revenue from Contracts with Customers . The ASU, as amended, implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of the amended guidance is that an entity should recognize revenue to depict the transfer of 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. Additionally, the amended guidance identifies specific steps an entity should apply in order to achieve this principle. The amended guidance requires entities to disclose both quantitative and qualitative information regarding contracts with customers. ASU 2014-09 will become effective for the Company on October 1, 2018. The majority of the Company's revenue is composed of interest income from loans and securities which are explicitly excluded from the amended ASU; therefore the amended ASU will likely not have a material impact to the Company's consolidated financial condition and results of operations, but it will likely result in expanded disclosures. The Company has completed its identification of revenue within the scope of the ASU and is in the process of evaluating the need for additional disclosures, the timing of recognition for the applicable revenue streams, and the presentation of certain revenues and expenses on a net basis. In January 2016, the FASB issued ASU 2016-01, Financial Instruments, Recognition and Measurement of Financial Assets and Liabilities . The ASU supersedes certain accounting guidance related to equity securities with readily determinable fair values and the related impairment assessment. An entity's equity investments that are accounted for under the equity method of accounting or result in consolidation of an investee are not included within the scope of this ASU. The ASU requires public business entities to utilize the exit price notation in determining fair value for financial instruments measured at amortized cost on the balance sheet. The ASU requires additional reporting in other comprehensive income for financial liabilities measured at fair value in accordance with the fair value option. The ASU also requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balances or in the notes to the financial statements. ASU 2016-01 will become effective for the Company on October 1, 2018. The Company does not currently hold any equity investments included within the scope of the ASU. The Company is currently evaluating the impact the ASU may have on the Company's consolidated financial condition, results of operations and disclosures. Based on the Company's preliminary analysis, the ASU it is not expected to have a material impact when adopted. Upon adoption, the exit price notion will be utilized when determining the fair value of financial instruments measured at amortized cost in the Company's fair value disclosures. In February 2016, the FASB issued ASU 2016-02, Leases . The ASU amends lease accounting guidance by requiring that lessees recognize the assets and liabilities arising from leases on the balance sheet. Additionally, the ASU requires entities to disclose both quantitative and qualitative information regarding their leasing activities. The accounting applied by a lessor is largely unchanged from that applied under the previous guidance. ASU 2016-02 will become effective for the Company on Oc tober 1, 2019. In July 2018, the FASB issued ASU 2018-11, Leases , which provides entities with relief from the costs of implementation by allowing the option to not restate comparative periods as part of the transition. The Company expects to select the transition relief provisions. The Company has substantially completed its development of a lease inventory and is developing an internal lease data collection, organization, and computing platform for compliance with this standard. The Company expects to recognize right-of-use assets and lease liabilities fo r substantially all of its operating lease commitments based on the present value of unpaid lease payments as of the date of adoption. The Company is continuing to evaluate the impact this ASU may have on the Company's consolidated financial condition, results of operations and disclosures. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting . The ASU simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, along with simplifying the classification in the statement of cash flows. The Company adopted the ASU on October 1, 2017. Upon adoption, the Company elected to account for forfeitures of stock-based compensation awards when they occur. The Company will recognize excess tax benefits and tax deficiencies in income tax expense on the consolidated statements of income and present them within operating activities on the consolidated statements of cash flows. This ASU did not have a material impact on the Company's consolidated financial condition or results of operations at the time of adoption. However, the impact of tax benefits and the timing of their recognition within income tax expense is unpredictable, as these benefits are recognized primarily as a result of stock options being exercised. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments . The ASU replaces the incurred loss impairment methodology in current GAAP, which requires credit losses to be recognized when it is probable that a loss has been incurred, with a new impairment methodology. The new impairment methodology requires an entity to measure, at each reporting date, the expected credit losses of financial assets not measured at fair value, such as loans, HTM debt securities, and loan commitments, over their contractual lives. Under the new impairment methodology, expected credit losses will be measured at each reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Additionally, the ASU amends the current credit loss measurements for AFS debt securities. Credit losses related to AFS debt securities will be recorded through the ACL rather than as a direct write-down as per current GAAP. The ASU also requires enhanced disclosures related to credit quality and significant estimates and judgments used by management when estimating credit losses. The ASU will become effective for the Company on October 1, 2020. The Company has formed a cross-functional working group comprised of individuals from various functional areas to assist with the implementation of the ASU. The Company is currently in the process of analyzing third-party vendor solutions to assist in the application of this ASU. While we are currently unable to reasonably estimate the impact of adopting this ASU, we expect the impact of adoption will be influenced by the composition of our loan and securities portfolios as well as the economic conditions and forecasts at the time of adoption. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging: Target Improvements to Accounting for Hedging Activities . The ASU amends the hedge accounting recognition and presentation requirements in current GAAP. The purpose of the ASU was to improve transparency of hedging relationships in the financial statements and to reduce the complexity of applying hedge accounting for preparers. The ASU will become effective for the Company on October 1, 2019. The Company is currently evaluating the effect of the ASU on the Company's consolidated financial condition, results of operations and disclosures. In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income. The ASU helps organizations address certain stranded income tax effects in AOCI resulting from the tax legislation enacted by the U.S. government on December 22, 2017 commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act") by allowing the reclassification of these amounts from AOCI to retained earnings. The effective date of this ASU for the Company is October 1, 2019, with early adoption permitted. The Company elected to early-adopt this ASU during the current fiscal year and reclassify the related tax effects from the enactment of the Tax Act, specifically those related to the change in the federal corporate tax rate, from AOCI to retained earnings. The reclassification was applied prospectively and is reflected in the Consolidated Statements of Stockholders' Equity. The Company releases the income tax effects of unrealized gains and losses related to AFS securities on a portfolio basis.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Shares acquired by the ESOP are not considered in the basic average shares outstanding until the shares are committed for allocation or vested to an employee's individual account. Unvested shares awarded pursuant to the Company's restricted stock benefit plans are treated as participating securities in the computation of EPS pursuant to the two-class method as they contain nonforfeitable rights to dividends. The two-class method is an earnings allocation that determines EPS for each class of common stock and participating security. For the Three Months Ended For the Nine Months Ended June 30, June 30, 2018 2017 2018 2017 (Dollars in thousands, except per share amounts) Net income $ 22,372 $ 21,370 $ 77,538 $ 63,535 Income allocated to participating securities (9 ) (11 ) (32 ) (36 ) Net income available to common stockholders $ 22,363 $ 21,359 $ 77,506 $ 63,499 Average common shares outstanding 134,401,188 134,170,638 134,386,678 133,962,680 Average committed ESOP shares outstanding 83,052 83,052 41,602 41,601 Total basic average common shares outstanding 134,484,240 134,253,690 134,428,280 134,004,281 Effect of dilutive stock options 45,713 106,080 62,275 185,477 Total diluted average common shares outstanding 134,529,953 134,359,770 134,490,555 134,189,758 Net EPS: Basic $ 0.17 $ 0.16 $ 0.58 $ 0.47 Diluted $ 0.17 $ 0.16 $ 0.58 $ 0.47 Antidilutive stock options, excluded from the diluted average common shares outstanding calculation 578,777 492,360 541,493 202,718

Securities

Securities	9 Months Ended
	Jun. 30, 2018
Marketable Securities [Abstract]
Securities	SECURITIES The following tables reflect the amortized cost, estimated fair value, and gross unrealized gains and losses of AFS and HTM securities at the dates presented. The majority of the MBS and investment securities portfolios are composed of securities issued by United States government-sponsored enterprises ("GSEs"). June 30, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 314,192 $ 3,917 $ 2,121 $ 315,988 GSE debentures 240,543 102 2,779 237,866 Municipal bonds 1,522 — 15 1,507 $ 556,257 $ 4,019 $ 4,915 $ 555,361 HTM: MBS $ 642,281 $ 5,124 $ 14,576 $ 632,829 Municipal bonds 22,241 3 108 22,136 $ 664,522 $ 5,127 $ 14,684 $ 654,965 September 30, 2017 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: GSE debentures $ 271,300 $ 16 $ 587 $ 270,729 MBS 135,644 5,923 51 141,516 Trust preferred securities 2,067 — 16 2,051 Municipal bonds 1,530 5 — 1,535 $ 410,541 $ 5,944 $ 654 $ 415,831 HTM: MBS $ 800,931 $ 10,460 $ 5,295 $ 806,096 Municipal bonds 26,807 119 13 26,913 $ 827,738 $ 10,579 $ 5,308 $ 833,009 The following tables summarize the estimated fair value and gross unrealized losses of those securities on which an unrealized loss at the dates presented was reported and the continuous unrealized loss position for less than 12 months and equal to or greater than 12 months as of the dates presented. June 30, 2018 Less Than 12 Months Equal to or Greater Than 12 Months Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses (Dollars in thousands) AFS: GSE debentures $ 123,539 $ 1,460 $ 98,653 $ 1,319 MBS 215,904 2,116 591 5 Municipal bonds 1,507 15 — — $ 340,950 $ 3,591 $ 99,244 $ 1,324 HTM: MBS $ 200,386 $ 4,206 $ 255,472 $ 10,370 Municipal bonds 18,229 108 — — $ 218,615 $ 4,314 $ 255,472 $ 10,370 September 30, 2017 Less Than 12 Months Equal to or Greater Than 12 Months Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses (Dollars in thousands) AFS: GSE debentures $ 224,421 $ 539 $ 24,952 $ 48 MBS 9,648 46 673 5 Trust preferred securities — — 2,051 16 $ 234,069 $ 585 $ 27,676 $ 69 HTM: MBS $ 259,200 $ 1,582 $ 201,094 $ 3,713 Municipal bonds 5,638 8 1,460 5 $ 264,838 $ 1,590 $ 202,554 $ 3,718 The unrealized losses at June 30, 2018 and September 30, 2017 were primarily a result of an increase in market yields from the time the securities were purchased. In general, as market yields rise, the fair value of securities will decrease; as market yields fall, the fair value of securities will increase. Management generally views changes in fair value caused by changes in interest rates as temporary. Therefore, these securities have not been classified as other-than-temporarily impaired. The impairment is also considered temporary because scheduled coupon payments have been made, it is anticipated that the entire principal balance will be collected as scheduled, and management neither intends to sell the securities, nor is it more likely than not that the Company will be required to sell the securities before the recovery of the remaining amortized cost amount, which could be at maturity. As a result of the analysis, management has concluded that no other-than-temporary impairments existed at June 30, 2018 or September 30, 2017 . The amortized cost and estimated fair value of debt securities as of June 30, 2018 , by contractual maturity, are shown below. Actual principal repayments may differ from contractual maturities due to prepayment or early call privileges by the issuer. In the case of MBS, borrowers on the underlying loans generally have the right to prepay their loans without prepayment penalty. For this reason, MBS are not included in the maturity categories. AFS HTM Amortized Estimated Amortized Estimated Cost Fair Value Cost Fair Value (Dollars in thousands) One year or less $ 50,000 $ 49,758 $ 5,102 $ 5,098 One year through five years 192,065 189,615 17,139 17,038 242,065 239,373 22,241 22,136 MBS 314,192 315,988 642,281 632,829 $ 556,257 $ 555,361 $ 664,522 $ 654,965 The following table presents the taxable and non-taxable components of interest income on investment securities for the periods presented. For the Three Months Ended For the Nine Months Ended June 30, June 30, 2018 2017 2018 2017 (Dollars in thousands) Taxable $ 1,214 $ 941 $ 3,092 $ 2,905 Non-taxable 93 122 303 396 $ 1,307 $ 1,063 $ 3,395 $ 3,301 The following table summarizes the carrying value of securities pledged as collateral for the obligations indicated below as of the dates presented. June 30, 2018 September 30, 2017 (Dollars in thousands) Public unit deposits $ 454,721 $ 499,993 Repurchase agreements 108,546 214,298 Federal Reserve Bank of Kansas City ("FRB of Kansas City") 7,959 11,769 $ 571,226 $ 726,060 During the current year nine month period, the Company sold trust preferred securities and received proceeds of $2.1 million . The Company recognized a gain of $9 thousand on the sale. All other dispositions of securities during the period were the result of principal repayments, calls, or maturities.

Loans Receivable And Allowance

Loans Receivable And Allowance For Credit Losses	9 Months Ended
	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Abstract]
Loans Receivable And Allowance For Credit Losses	LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES Loans receivable, net at the dates presented is summarized as follows: June 30, 2018 September 30, 2017 (Dollars in thousands) Real estate loans: One- to four-family: Originated $ 3,931,251 $ 3,959,232 Correspondent purchased 2,514,929 2,445,311 Bulk purchased 309,837 351,705 Construction 27,565 30,647 Total 6,783,582 6,786,895 Commercial: Permanent 274,410 183,030 Construction 44,645 86,952 Total 319,055 269,982 Total real estate loans 7,102,637 7,056,877 Consumer loans: Home equity 119,079 122,066 Other 4,453 3,808 Total consumer loans 123,532 125,874 Total loans receivable 7,226,169 7,182,751 Less: ACL 8,344 8,398 Discounts/unearned loan fees 25,124 24,962 Premiums/deferred costs (46,683 ) (45,680 ) $ 7,239,384 $ 7,195,071 Lending Practices and Underwriting Standards - Originating and purchasing one- to four-family loans is the Bank's primary lending business. The Bank also originates consumer loans primarily secured by one- to four-family residential properties and originates and participates in commercial real estate loans. The Bank has a loan concentration in one- to four-family loans and a geographic concentration of these loans in Kansas and Missouri. One- to four-family loans - Full documentation to support an applicant's credit and income, and sufficient funds to cover all applicable fees and reserves at closing, are required on all loans. Generally, loans are currently underwritten according to the "ability to repay" and "qualified mortgage" standards, as issued by the Consumer Financial Protection Bureau ("CFPB"). Properties securing one- to four-family loans are appraised by either staff appraisers or fee appraisers, both of which are independent of the loan origination function and approved by our Board of Directors. The underwriting standards for loans purchased from correspondent lenders are generally similar to the Bank's internal underwriting standards. The underwriting of loans purchased from correspondent lenders on a loan-by-loan basis is performed by the Bank's underwriters. The Bank also originates construction-to-permanent loans secured by one- to four-family residential real estate. Construction loans are obtained by homeowners who will occupy the property when construction is complete. The Bank does not originate construction loans to builders for speculative purposes. Construction draw requests and the supporting documentation are reviewed and approved by designated personnel. The Bank also performs regular documented inspections of the construction project to ensure the funds are being used for the intended purpose and the project is being completed according to the plans and specifications provided. Commercial real estate loans - The Bank's commercial real estate loans are originated by the Bank or are in participation with a lead bank. When underwriting a commercial real estate loan, several factors are considered, such as the income producing potential of the property, cash equity provided by the borrower, the financial strength of the borrower, managerial expertise of the borrower or tenant, feasibility studies, lending experience with the borrower and the marketability of the property. For commercial real estate participation loans, the Bank performs the same underwriting procedures as if the loan was being originated by the Bank. At the time of origination, loan-to-value ("LTV") ratios on commercial real estate loans generally do not exceed 80% of the appraised value of the property securing the loans and the minimum debt service coverage ratio is generally 1.25 . Appraisals on properties securing these loans are performed by independent state certified fee appraisers. Consumer loans - The Bank offers a variety of secured consumer loans, including home equity loans and lines of credit, home improvement loans, auto loans, and loans secured by savings deposits. The Bank also originates a very limited amount of unsecured loans. The Bank does not originate any consumer loans on an indirect basis, such as contracts purchased from retailers of goods or services which have extended credit to their customers. The majority of the consumer loan portfolio is comprised of home equity lines of credit for which the Bank also has the first mortgage or the home equity line of credit is in the first lien position. The underwriting standards for consumer loans include a determination of an applicant's payment history on other debts and an assessment of an applicant's ability to meet existing obligations and payments on the proposed loan. Although creditworthiness of an applicant is a primary consideration, the underwriting process also includes a comparison of the value of the security in relation to the proposed loan amount. Credit Quality Indicators - Based on the Bank's lending emphasis and underwriting standards, management has segmented the loan portfolio into three segments: (1) one- to four-family; (2) consumer; and (3) commercial real estate. The one- to four-family and consumer loan portfolios are further segmented into classes for purposes of providing disaggregated information about the credit quality of the loan portfolio. The classes are: one- to four-family - originated, one- to four-family - correspondent purchased, one- to four-family - bulk purchased, consumer - home equity, and consumer - other. The Bank's primary credit quality indicators for the one- to four-family and consumer - home equity loan portfolios are delinquency status, asset classifications, LTV ratios, and borrower credit scores. The Bank's primary credit quality indicators for the commercial real estate and consumer - other loan portfolios are delinquency status and asset classifications. The following tables present the recorded investment, by class, in loans 30 to 89 days delinquent, loans 90 or more days delinquent or in foreclosure, total delinquent loans, current loans, and total recorded investment at the dates presented. The recorded investment in loans is defined as the unpaid principal balance of a loan, less charge-offs and inclusive of unearned loan fees and deferred costs. At June 30, 2018 and September 30, 2017 , all loans 90 or more days delinquent were on nonaccrual status. June 30, 2018 90 or More Days Total Total 30 to 89 Days Delinquent or Delinquent Current Recorded Delinquent in Foreclosure Loans Loans Investment (Dollars in thousands) One- to four-family - originated $ 7,614 $ 5,028 $ 12,642 $ 3,932,144 $ 3,944,786 One- to four-family - correspondent 1,776 880 2,656 2,547,714 2,550,370 One- to four-family - bulk purchased 3,802 2,612 6,414 304,863 311,277 Commercial real estate 41 — 41 317,722 317,763 Consumer - home equity 341 423 764 118,315 119,079 Consumer - other 22 2 24 4,429 4,453 $ 13,596 $ 8,945 $ 22,541 $ 7,225,187 $ 7,247,728 September 30, 2017 90 or More Days Total Total 30 to 89 Days Delinquent or Delinquent Current Recorded Delinquent in Foreclosure Loans Loans Investment (Dollars in thousands) One- to four-family - originated $ 13,216 $ 5,500 $ 18,716 $ 3,956,598 $ 3,975,314 One- to four-family - correspondent 1,855 92 1,947 2,477,916 2,479,863 One- to four-family - bulk purchased 3,233 3,399 6,632 346,807 353,439 Commercial real estate — — — 268,979 268,979 Consumer - home equity 467 406 873 121,193 122,066 Consumer - other 33 4 37 3,771 3,808 $ 18,804 $ 9,401 $ 28,205 $ 7,175,264 $ 7,203,469 The recorded investment in mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process as of June 30, 2018 and September 30, 2017 was $2.8 million and $4.3 million , respectively, which is included in loans 90 or more days delinquent or in foreclosure in the table above. The carrying value of residential OREO held as a result of obtaining physical possession upon completion of a foreclosure or through completion of a deed in lieu of foreclosure was $897 thousand at June 30, 2018 and $1.4 million at September 30, 2017 . The following table presents the recorded investment, by class, in loans classified as nonaccrual at the dates presented. June 30, 2018 September 30, 2017 (Dollars in thousands) One- to four-family - originated $ 7,490 $ 10,054 One- to four-family - correspondent 977 1,804 One- to four-family - bulk purchased 2,964 4,264 Commercial real estate — — Consumer - home equity 492 519 Consumer - other 2 4 $ 11,925 $ 16,645 In accordance with the Bank's asset classification policy, management regularly reviews the problem loans in the Bank's portfolio to determine whether any loans require classification. Loan classifications are defined as follows: • Special mention - These loans are performing loans on which known information about the collateral pledged or the possible credit problems of the borrower(s) have caused management to have doubts as to the ability of the borrower(s) to comply with present loan repayment terms and which may result in the future inclusion of such loans in the non-performing loan categories. • Substandard - A loan is considered substandard if it is inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard loans include those characterized by the distinct possibility the Bank will sustain some loss if the deficiencies are not corrected. • Doubtful - Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses present make collection or liquidation in full on the basis of currently existing facts and conditions and values highly questionable and improbable. • Loss - Loans classified as loss are considered uncollectible and of such little value that their continuance as assets on the books is not warranted. The following table sets forth the recorded investment in loans classified as special mention or substandard, by class, at the dates presented. Special mention and substandard loans are included in the ACL formula analysis model if the loans are not individually evaluated for loss. Loans classified as doubtful or loss are individually evaluated for loss. At the dates presented, there were no loans classified as doubtful, and all loans classified as loss were fully charged-off. June 30, 2018 September 30, 2017 Special Mention Substandard Special Mention Substandard (Dollars in thousands) One- to four-family - originated $ 8,867 $ 22,892 $ 7,031 $ 30,059 One- to four-family - correspondent 885 3,497 261 3,800 One- to four-family - bulk purchased — 6,765 — 8,005 Commercial real estate 41 — — — Consumer - home equity 286 889 9 1,032 Consumer - other — 3 — 4 $ 10,079 $ 34,046 $ 7,301 $ 42,900 The following table shows the weighted average credit score and weighted average LTV for one- to four-family loans and consumer home equity loans at the dates presented. Borrower credit scores are intended to provide an indication as to the likelihood that a borrower will repay their debts. Credit scores are updated at least semiannually, with the last update in March 2018, from a nationally recognized consumer rating agency. The LTV ratios provide an estimate of the extent to which the Bank may incur a loss on any given loan that may go into foreclosure. The consumer - home equity LTV does not take into account the first lien position, if applicable. The LTV ratios were based on the current loan balance and either the lesser of the purchase price or original appraisal, or the most recent Bank appraisal, if available. In most cases, the most recent appraisal was obtained at the time of origination. June 30, 2018 September 30, 2017 Credit Score LTV Credit Score LTV One- to four-family - originated 768 63 % 767 63 % One- to four-family - correspondent 764 67 764 68 One- to four-family - bulk purchased 759 62 757 63 Consumer - home equity 755 19 755 19 766 63 765 64 Troubled Debt Restructurings ("TDRs") - The following tables present the recorded investment prior to restructuring and immediately after restructuring in all loans restructured during the periods presented. These tables do not reflect the recorded investment at the end of the periods indicated. Any increase in the recorded investment at the time of the restructuring was generally due to the capitalization of delinquent interest and/or escrow balances. During the fourth quarter of fiscal year 2017, management refined its methodology for assessing whether a loan modification qualifies as a TDR which, though not material, resulted in fewer loans being classified as TDRs in the current fiscal year. For the Three Months Ended For the Nine Months Ended June 30, 2018 June 30, 2018 Number Pre- Post- Number Pre- Post- of Restructured Restructured of Restructured Restructured Contracts Outstanding Outstanding Contracts Outstanding Outstanding (Dollars in thousands) One- to four-family - originated 1 $ 40 $ 47 4 $ 207 $ 223 One- to four-family - correspondent 1 97 97 1 97 97 One- to four-family - bulk purchased — — — — — — Commercial real estate — — — — — — Consumer - home equity — — — — — — Consumer - other — — — — — — 2 $ 137 $ 144 5 $ 304 $ 320 For the Three Months Ended For the Nine Months Ended June 30, 2017 June 30, 2017 Number Pre- Post- Number Pre- Post- of Restructured Restructured of Restructured Restructured Contracts Outstanding Outstanding Contracts Outstanding Outstanding (Dollars in thousands) One- to four-family - originated 28 $ 2,447 $ 2,518 109 $ 11,735 $ 12,195 One- to four-family - correspondent 7 1,435 1,443 10 1,695 1,704 One- to four-family - bulk purchased 1 344 348 3 1,031 1,048 Commercial real estate — — — — — — Consumer - home equity 3 51 53 17 368 380 Consumer - other — — — — — — 39 $ 4,277 $ 4,362 139 $ 14,829 $ 15,327 The following table provides information on TDRs that became delinquent during the periods presented within 12 months after being restructured. For the Three Months Ended For the Nine Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Number of Recorded Number of Recorded Number of Recorded Number of Recorded Contracts Investment Contracts Investment Contracts Investment Contracts Investment (Dollars in thousands) One- to four-family - originated 1 $ 34 14 $ 1,439 20 $ 1,288 36 $ 3,486 One- to four-family - correspondent — — 1 119 1 124 1 119 One- to four-family - bulk purchased — — 1 354 3 1,040 1 354 Commercial real estate — — — — — — — — Consumer - home equity — — 6 93 4 133 15 432 Consumer - other — — — — — — — — 1 $ 34 22 $ 2,005 28 $ 2,585 53 $ 4,391 Impaired loans - The following information pertains to impaired loans, by class, as of the dates presented. All impaired loans were individually evaluated for loss and all losses were charged-off, resulting in no related ACL for these loans. June 30, 2018 September 30, 2017 Unpaid Unpaid Recorded Principal Recorded Principal Investment Balance Investment Balance (Dollars in thousands) One- to four-family - originated $ 20,662 $ 21,329 $ 30,251 $ 30,953 One- to four-family - correspondent 2,926 3,023 3,800 3,771 One- to four-family - bulk purchased 6,041 7,005 7,403 8,606 Commercial real estate — — — — Consumer - home equity 535 767 775 997 Consumer - other — 29 — 24 $ 30,164 $ 32,153 $ 42,229 $ 44,351 The following information pertains to impaired loans, by class, for the periods presented. During the fourth quarter of fiscal year 2017, management refined its methodology for classifying loans as impaired. The change resulting from this refinement was immaterial. Impaired loans include loans partially charged-off and TDRs. For the Three Months Ended For the Nine Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Average Interest Average Interest Average Interest Average Interest Recorded Income Recorded Income Recorded Income Recorded Income Investment Recognized Investment Recognized Investment Recognized Investment Recognized (Dollars in thousands) With no related allowance recorded One- to four-family - originated $ 21,939 $ 236 $ 24,342 $ 230 $ 25,254 $ 784 $ 23,478 $ 653 One- to four-family - correspondent 3,055 24 3,497 32 3,351 88 3,463 91 One- to four-family - bulk purchased 6,113 48 9,950 49 6,563 143 10,490 144 Commercial real estate — — — — — — — — Consumer - home equity 552 10 1,095 12 609 29 1,043 75 Consumer - other — — 4 — — — 8 — 31,659 318 38,888 323 35,777 1,044 38,482 963 With an allowance recorded One- to four-family - originated — — 12,787 117 — — 12,878 367 One- to four-family - correspondent — — 2,405 20 — — 2,150 52 One- to four-family - bulk purchased — — 1,136 7 — — 1,358 17 Commercial real estate — — — — — — — — Consumer - home equity — — 444 4 — — 525 33 Consumer - other — — 12 — — — 12 — — — 16,784 148 — — 16,923 469 Total One- to four-family - originated 21,939 236 37,129 347 25,254 784 36,356 1,020 One- to four-family - correspondent 3,055 24 5,902 52 3,351 88 5,613 143 One- to four-family - bulk purchased 6,113 48 11,086 56 6,563 143 11,848 161 Commercial real estate — — — — — — — — Consumer - home equity 552 10 1,539 16 609 29 1,568 108 Consumer - other — — 16 — — — 20 — $ 31,659 $ 318 $ 55,672 $ 471 $ 35,777 $ 1,044 $ 55,405 $ 1,432 Allowance for Credit Losses - The following is a summary of ACL activity, by loan portfolio segment, for the periods presented, and the ending balance of ACL based on the Company's impairment methodology. For the Three Months Ended June 30, 2018 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,156 $ 2,034 $ 1,000 $ 6,190 $ 2,038 $ 162 $ 8,390 Charge-offs (51 ) — — (51 ) — (3 ) (54 ) Recoveries 4 — — 4 — 4 8 Provision for credit losses (80 ) (111 ) — (191 ) 192 (1 ) — Ending balance $ 3,029 $ 1,923 $ 1,000 $ 5,952 $ 2,230 $ 162 $ 8,344 For the Nine Months Ended June 30, 2018 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,173 $ 1,922 $ 1,000 $ 6,095 $ 2,112 $ 191 $ 8,398 Charge-offs (122 ) (128 ) — (250 ) — (38 ) (288 ) Recoveries 21 — 196 217 — 17 234 Provision for credit losses (43 ) 129 (196 ) (110 ) 118 (8 ) — Ending balance $ 3,029 $ 1,923 $ 1,000 $ 5,952 $ 2,230 $ 162 $ 8,344 For the Three Months Ended June 30, 2017 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,351 $ 1,940 $ 1,000 $ 6,291 $ 1,885 $ 271 $ 8,447 Charge-offs (4 ) — (25 ) (29 ) — (12 ) (41 ) Recoveries 3 — 69 72 — 8 80 Provision for credit losses (128 ) (24 ) (44 ) (196 ) 204 (8 ) — Ending balance $ 3,222 $ 1,916 $ 1,000 $ 6,138 $ 2,089 $ 259 $ 8,486 For the Nine Months Ended June 30, 2017 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,928 $ 2,102 $ 1,065 $ 7,095 $ 1,208 $ 237 $ 8,540 Charge-offs (45 ) — (73 ) (118 ) — (37 ) (155 ) Recoveries 3 — 69 72 — 29 101 Provision for credit losses (664 ) (186 ) (61 ) (911 ) 881 30 — Ending balance $ 3,222 $ 1,916 $ 1,000 $ 6,138 $ 2,089 $ 259 $ 8,486 The following is a summary of the loan portfolio and related ACL balances, at the dates presented, by loan portfolio segment disaggregated by the Company's impairment method. There was no ACL for loans individually evaluated for impairment at either date as all losses were charged-off. June 30, 2018 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,924,124 $ 2,547,444 $ 305,236 $ 6,776,804 $ 317,763 $ 122,997 $ 7,217,564 Recorded investment in loans individually evaluated for impairment 20,662 2,926 6,041 29,629 — 535 30,164 $ 3,944,786 $ 2,550,370 $ 311,277 $ 6,806,433 $ 317,763 $ 123,532 $ 7,247,728 ACL for loans collectively evaluated for impairment $ 3,029 $ 1,923 $ 1,000 $ 5,952 $ 2,230 $ 162 $ 8,344 September 30, 2017 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,945,063 $ 2,476,063 $ 346,035 $ 6,767,161 $ 268,979 $ 125,100 $ 7,161,240 Recorded investment in loans individually evaluated for impairment 30,251 3,800 7,404 41,455 — 774 42,229 $ 3,975,314 $ 2,479,863 $ 353,439 $ 6,808,616 $ 268,979 $ 125,874 $ 7,203,469 ACL for loans collectively evaluated for impairment $ 3,173 $ 1,922 $ 1,000 $ 6,095 $ 2,112 $ 191 $ 8,398

Income Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The Tax Act made significant changes to the U.S. corporate income tax laws, such as a permanent reduction in the federal corporate income tax rate from 35% to 21% effective January 1, 2018, bonus depreciation that will allow full expensing of qualified property, and other changes to and/or limitations on certain corporate income tax deductions. As required by Section 15 of the Internal Revenue Code, the Company will have a blended statutory federal income tax rate of 24.5% for fiscal year 2018, which is based on the applicable income tax rates prior to and subsequent to January 1, 2018 and the number of days in the fiscal year. In accordance with GAAP, the Company applied the blended federal income tax rate to pretax income in the current quarter and revalued its deferred tax assets and liabilities as of December 22, 2017 to account for the future impact of a lower federal income tax rate. The revaluation of the Company's deferred tax assets and liabilities resulted in a $7.5 million reduction in income tax expense during the December 31, 2017 quarter and a corresponding reduction in the Company's net deferred tax liability. Management estimates the effective income tax rate for fiscal year 2018 will be between 20% and 21% which is significantly lower than the effective tax rate of 34.2% for fiscal year 2017. The effective income tax rate is anticipated to be lower in the current fiscal year than the prior fiscal year due primarily to the revaluation of the Company's deferred tax assets and liabilities along with a lower blended statutory federal income tax rate. During the December 31, 2017 quarter, management reviewed the carrying value of the Bank's low income housing partnership investments in relation to the remaining tax benefits, considering the reduction in the corporate income tax rate, and determined there was no impairment present.

Repurchase Agreements

Repurchase Agreements	9 Months Ended
	Jun. 30, 2018
Disclosure of Repurchase Agreements [Abstract]
Repurchase Agreements	REPURCHASE AGREEMENTS At June 30, 2018 and September 30, 2017 , the Company had repurchase agreements outstanding in the amount of $100.0 million and $200.0 million , respectively, with a weighted average contractual rate of 2.53% and 2.94% , respectively. The $100.0 million outstanding at June 30, 2018 is scheduled to mature during fiscal year 2020. All of the Company's repurchase agreements at June 30, 2018 and September 30, 2017 were fixed-rate. See Note 3 for information regarding the amount of securities pledged as collateral in conjunction with repurchase agreements. Securities are delivered to the party with whom each transaction is executed and the party agrees to resell the same securities to the Bank at the maturity of the agreement. The Bank retains the right to substitute similar securities throughout the terms of the agreements. The repurchase agreements and collateral are subject to valuation at current market levels and the Bank may ask for the return of excess collateral or be required to post additional collateral due to changes in the market values of these items. The Bank may also be required to post additional collateral as a result of principal payments received on the securities pledged.

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	9 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Of Financial Instruments	FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Measurements - The Company uses fair value measurements to record fair value adjustments to certain financial instruments and to determine fair value disclosures in accordance with Accounting Standards Codification ("ASC") 820 and ASC 825. The Company's AFS securities and interest rate swaps are recorded at fair value on a recurring basis. Additionally, from time to time, the Company may be required to record at fair value other financial instruments on a non-recurring basis, such as OREO and loans individually evaluated for impairment. These non-recurring fair value adjustments involve the application of lower of cost or fair value accounting or write-downs of individual financial instruments. The Company groups its financial instruments at fair value in three levels based on the markets in which the financial instruments are traded and the reliability of the assumptions used to determine fair value. These levels are: • Level 1 - Valuation is based upon quoted prices for identical instruments traded in active markets. • Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3 - Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect the Company's own estimates of assumptions that market participants would use in pricing the financial instrument. Valuation techniques include the use of option pricing models, discounted cash flow models, and similar techniques. The results cannot be determined with precision and may not be realized in an actual sale or immediate settlement of the financial instrument. The Company bases its fair values on the price that would be received from the sale of a financial instrument in an orderly transaction between market participants at the measurement date under current market conditions. The Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The following is a description of valuation methodologies used for financial instruments measured at fair value on a recurring basis. AFS Securities - The Company's AFS securities portfolio is carried at estimated fair value, with any unrealized gains and losses, net of taxes, reported as AOCI in stockholders' equity. The majority of the securities within the AFS portfolio were issued by GSEs. The Company primarily uses prices obtained from third party pricing services to determine the fair value of its securities. On a quarterly basis, management corroborates a sample of prices obtained from the third party pricing service for Level 2 securities by comparing them to an independent source. If the price provided by the independent source varies by more than a predetermined percentage from the price received from the third party pricing service, then the variance is researched by management. The Company did not have to adjust prices obtained from the third party pricing service when determining the fair value of its securities during the nine months ended June 30, 2018 or during fiscal year 2017. The Company's major security types, based on the nature and risks of the securities, are: • GSE Debentures - Estimated fair values are based on a discounted cash flow method. Cash flows are determined by taking any embedded options into consideration and are discounted using current market yields for similar securities. (Level 2) • MBS - Estimated fair values are based on a discounted cash flow method. Cash flows are determined based on prepayment projections of the underlying mortgages and are discounted using current market yields for benchmark securities. (Level 2) • Municipal Bonds - Estimated fair values are based on a discounted cash flow method. Cash flows are determined by taking any embedded options into consideration and are discounted using current market yields for securities with similar credit profiles. (Level 2) • Trust Preferred Securities - Estimated fair values are based on a discounted cash flow method. Cash flows are determined by taking prepayment and underlying credit considerations into account. The discount rates are derived from secondary trades and bid/offer prices. (Level 3) Interest Rate Swaps - The Company's interest rate swaps are designated as cash flow hedges and are reported at fair value in other assets on the consolidated balance sheet if in a gain position, and in accounts payable and accrued expenses if in a loss position, with any unrealized gains and losses, net of taxes, reported as AOCI in stockholders' equity. The estimated fair value of the interest rates swaps are obtained from the counterparty and are determined using a discounted cash flow analysis using observable market-based inputs. On a quarterly basis, management corroborates the estimated fair values by internally calculating the estimated fair value using a discounted cash flow analysis using independent observable market-based inputs from a third party. The Company did not make any adjustments to the estimated fair value during the nine months ended June 30, 2018 or during fiscal year 2017. (Level 2) The following tables provide the level of valuation assumption used to determine the carrying value of the Company's financial instruments measured at fair value on a recurring basis at the dates presented. June 30, 2018 Quoted Prices Significant Significant in Active Markets Other Observable Unobservable Carrying for Identical Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) (Dollars in thousands) Assets: AFS Securities: GSE debentures $ 237,866 $ — $ 237,866 $ — MBS 315,988 — 315,988 — Municipal bonds 1,507 — 1,507 — 555,361 — 555,361 — Interest Rate Swaps 5,868 — 5,868 — $ 561,229 $ — $ 561,229 $ — September 30, 2017 Quoted Prices Significant Significant in Active Markets Other Observable Unobservable Carrying for Identical Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) (Dollars in thousands) Assets: AFS Securities: GSE debentures $ 270,729 $ — $ 270,729 $ — MBS 141,516 — 141,516 — Municipal bonds 1,535 — 1,535 — Trust preferred securities 2,051 — — 2,051 $ 415,831 $ — $ 413,780 $ 2,051 Liabilities: Interest Rate Swaps $ 598 $ — $ 598 $ — The Company sold its Level 3 AFS security during the nine months ended June 30, 2018 , received proceeds of $2.1 million , and recognized a gain on sale of $9 thousand , which is included in other non-interest income in the Company's consolidated statement of income. The Company's Level 3 AFS securities had no activity during the three and nine months ended June 30, 2017 , except for principal repayments of $13 thousand and $75 thousand , respectively, an increase in net unrealized losses of $4 thousand for the three months ended June 30, 2017 and a decrease in net unrealized losses $121 thousand for the nine months ended June 30, 2017, which are included in other comprehensive income. The following is a description of valuation methodologies used for significant financial instruments measured at fair value on a non-recurring basis. Loans Receivable - The amount of loans individually evaluated for impairment on a non-recurring basis during the nine months ended June 30, 2018 and 2017 that were still held in the portfolio as of June 30, 2018 and 2017 was $5.8 million and $22.4 million , respectively. All of these loans were secured by residential real estate and were individually evaluated to determine if the carrying value of the loan was in excess of the fair value of the collateral, less estimated selling costs of 10% . Fair values were estimated through current appraisals. Management does not adjust or apply a discount to the appraised value, except for the estimated sales cost noted above. The primary significant unobservable input for loans individually evaluated for impairment was the appraisal. Fair values of loans individually evaluated for impairment cannot be determined with precision and may not be realized in an actual sale or immediate settlement of the loan and, as such, are classified as Level 3. Based on this evaluation, the Bank charged-off all loss amounts as of June 30, 2018 and 2017 ; therefore, the fair value was equal to the carrying value and there was no ACL related to these loans. OREO - OREO primarily represents real estate acquired as a result of foreclosure or by deed in lieu of foreclosure and is carried at lower of cost or fair value. Fair value is estimated through current appraisals or listing prices, less estimated selling costs of 10% . Management does not adjust or apply a discount to the appraised value or listing price, except for the estimated sales costs noted above. The primary significant unobservable input for OREO was the appraisal or listing price. Fair values of foreclosed property cannot be determined with precision and may not be realized in an actual sale of the property and, as such, are classified as Level 3. The fair value of OREO measured on a non-recurring basis during the nine months ended June 30, 2018 and 2017 that was still held in the portfolio as of June 30, 2018 and 2017 was $897 thousand and $1.9 million , respectively. The carrying value of the properties equaled the fair value of the properties at June 30, 2018 and 2017 . Fair Value Disclosures - The Company determined estimated fair value amounts using available market information and a variety of valuation methodologies as of the dates presented. Considerable judgment is required to interpret market data to develop the estimates of fair value. The estimates presented are not necessarily indicative of amounts the Company would realize from a current market exchange at subsequent dates. The carrying amounts and estimated fair values of the Company's financial instruments, at the dates presented, were as follows: June 30, 2018 September 30, 2017 Estimated Estimated Carrying Fair Carrying Fair Amount Value Amount Value (Dollars in thousands) Assets: Cash and cash equivalents $ 182,078 $ 182,078 $ 351,659 $ 351,659 AFS securities 555,361 555,361 415,831 415,831 HTM securities 664,522 654,965 827,738 833,009 Loans receivable 7,239,384 7,169,554 7,195,071 7,354,100 FHLB stock 100,694 100,694 100,954 100,954 Interest rate swaps 5,868 5,868 — — Liabilities: Deposits 5,323,083 5,293,281 5,309,868 5,318,249 FHLB borrowings 2,174,816 2,148,525 2,173,808 2,182,841 Repurchase agreements 100,000 99,244 200,000 202,004 Interest rate swaps — — 598 598 The following methods and assumptions were used to estimate the fair value of the financial instruments: Cash and cash equivalents - The carrying amounts of cash and cash equivalents are considered to approximate their fair value due to the nature of the financial assets. (Level 1) HTM securities - Estimated fair values of securities are based on one of three methods: (1) quoted market prices where available; (2) quoted market prices for similar instruments if quoted market prices are not available; (3) unobservable data that represents the Bank's assumptions about items that market participants would consider in determining fair value where no market data is available. HTM securities are carried at amortized cost. (Level 2) Loans receivable - The fair value of one- to four-family loans and home equity loans are generally estimated using the present value of expected future cash flows, assuming future prepayments and using discount factors determined by prices obtained from securitization markets, less a discount for the cost of servicing and lack of liquidity. The estimated fair value of the Bank's commercial and consumer loans are based on the expected future cash flows assuming future prepayments and discount factors based on current offering rates. (Level 3) FHLB stock - The carrying value and estimated fair value of FHLB stock equals cost, which is based on redemption at par value. (Level 1) Deposits - The estimated fair value of demand deposits, savings, and money market accounts is the amount payable on demand at the reporting date. The estimated fair value of these deposits at June 30, 2018 and September 30, 2017 was $2.48 billion and $2.40 billion , respectively. (Level 1) The fair value of certificates of deposit is estimated by discounting future cash flows using current London Interbank Offered Rates ("LIBOR"). The estimated fair value of certificates of deposit at June 30, 2018 and September 30, 2017 was $2.81 billion and $2.92 billion , respectively. (Level 2) FHLB borrowings and repurchase agreements - The fair value of fixed-maturity borrowed funds is estimated by discounting estimated future cash flows using current offer rates. (Level 2) The carrying value of FHLB line of credit is considered to approximate its fair value due to the nature of the financial liability. (Level 1) Interest rate swaps - The fair value of the interest rate swaps was determined using discounted cash flow analysis using observable market-based inputs. (Level 2)

Other Comprehensive Income

Other Comprehensive Income	9 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Other Comprehensive Income	OTHER COMPREHENSIVE INCOME The following tables present the changes in the components of AOCI, net of tax, for the three and nine months ended June 30, 2018 . During the three and nine months ended June 30, 2017 , the only changes in AOCI, net of tax, were related to unrealized gains (losses) on AFS securities and there were no amounts reclassified from AOCI. For the Three Months Ended June 30, 2018 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (dollars in thousands) Beginning balance $ 687 $ 4,472 $ 5,159 Other comprehensive income (loss), before reclassifications (1,366 ) (1 ) (1,367 ) Amount reclassified from AOCI — (29 ) (29 ) Other comprehensive income (loss) (1,366 ) (30 ) (1,396 ) Ending balance $ (679 ) $ 4,442 $ 3,763 For the Nine Months Ended June 30, 2018 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (dollars in thousands) Beginning balance $ 3,290 $ (372 ) $ 2,918 Other comprehensive income (loss), before reclassifications (4,430 ) 5,051 621 Amount reclassified from AOCI — (443 ) (443 ) Other comprehensive income (loss) (4,430 ) 4,608 178 Reclassification of certain income tax effects related to adoption of ASU 2018-02 461 206 667 Ending balance $ (679 ) $ 4,442 $ 3,763

Summary Of Significant Accoun18

Summary Of Significant Accounting Policies (Policies)	9 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation	The consolidated financial statements include the accounts of Capitol Federal® Financial, Inc. (the "Company") and its wholly-owned subsidiary, Capitol Federal Savings Bank (the "Bank"). The Bank has a wholly-owned subsidiary, Capitol Funds, Inc. Capitol Funds, Inc. has a wholly-owned subsidiary, Capitol Federal Mortgage Reinsurance Company. All intercompany accounts and transactions have been eliminated in consolidation. The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. These statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended September 30, 2017 , filed with the Securities and Exchange Commission ("SEC"). Interim results are not necessarily indicative of results for a full year.
Net Presentation of Cash Flows Related to Borrowings	During the current fiscal year, the Bank entered into certain FHLB advances with contractual maturities of 90 days or less. Cash flows related to these advances are reported on a net basis in the consolidated statements of cash flows.
Income Taxes	The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred income tax assets and liabilities are recognized for the tax consequences of temporary differences between the financial statement carrying amounts and the tax basis of existing assets and liabilities. 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. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.
Recent Accounting Pronouncements	In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, Revenue from Contracts with Customers . The ASU, as amended, implements a common revenue standard that clarifies the principles for recognizing revenue. The core principle of the amended guidance is that an entity should recognize revenue to depict the transfer of 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. Additionally, the amended guidance identifies specific steps an entity should apply in order to achieve this principle. The amended guidance requires entities to disclose both quantitative and qualitative information regarding contracts with customers. ASU 2014-09 will become effective for the Company on October 1, 2018. The majority of the Company's revenue is composed of interest income from loans and securities which are explicitly excluded from the amended ASU; therefore the amended ASU will likely not have a material impact to the Company's consolidated financial condition and results of operations, but it will likely result in expanded disclosures. The Company has completed its identification of revenue within the scope of the ASU and is in the process of evaluating the need for additional disclosures, the timing of recognition for the applicable revenue streams, and the presentation of certain revenues and expenses on a net basis. In January 2016, the FASB issued ASU 2016-01, Financial Instruments, Recognition and Measurement of Financial Assets and Liabilities . The ASU supersedes certain accounting guidance related to equity securities with readily determinable fair values and the related impairment assessment. An entity's equity investments that are accounted for under the equity method of accounting or result in consolidation of an investee are not included within the scope of this ASU. The ASU requires public business entities to utilize the exit price notation in determining fair value for financial instruments measured at amortized cost on the balance sheet. The ASU requires additional reporting in other comprehensive income for financial liabilities measured at fair value in accordance with the fair value option. The ASU also requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balances or in the notes to the financial statements. ASU 2016-01 will become effective for the Company on October 1, 2018. The Company does not currently hold any equity investments included within the scope of the ASU. The Company is currently evaluating the impact the ASU may have on the Company's consolidated financial condition, results of operations and disclosures. Based on the Company's preliminary analysis, the ASU it is not expected to have a material impact when adopted. Upon adoption, the exit price notion will be utilized when determining the fair value of financial instruments measured at amortized cost in the Company's fair value disclosures. In February 2016, the FASB issued ASU 2016-02, Leases . The ASU amends lease accounting guidance by requiring that lessees recognize the assets and liabilities arising from leases on the balance sheet. Additionally, the ASU requires entities to disclose both quantitative and qualitative information regarding their leasing activities. The accounting applied by a lessor is largely unchanged from that applied under the previous guidance. ASU 2016-02 will become effective for the Company on Oc tober 1, 2019. In July 2018, the FASB issued ASU 2018-11, Leases , which provides entities with relief from the costs of implementation by allowing the option to not restate comparative periods as part of the transition. The Company expects to select the transition relief provisions. The Company has substantially completed its development of a lease inventory and is developing an internal lease data collection, organization, and computing platform for compliance with this standard. The Company expects to recognize right-of-use assets and lease liabilities fo r substantially all of its operating lease commitments based on the present value of unpaid lease payments as of the date of adoption. The Company is continuing to evaluate the impact this ASU may have on the Company's consolidated financial condition, results of operations and disclosures. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting . The ASU simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, along with simplifying the classification in the statement of cash flows. The Company adopted the ASU on October 1, 2017. Upon adoption, the Company elected to account for forfeitures of stock-based compensation awards when they occur. The Company will recognize excess tax benefits and tax deficiencies in income tax expense on the consolidated statements of income and present them within operating activities on the consolidated statements of cash flows. This ASU did not have a material impact on the Company's consolidated financial condition or results of operations at the time of adoption. However, the impact of tax benefits and the timing of their recognition within income tax expense is unpredictable, as these benefits are recognized primarily as a result of stock options being exercised. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments . The ASU replaces the incurred loss impairment methodology in current GAAP, which requires credit losses to be recognized when it is probable that a loss has been incurred, with a new impairment methodology. The new impairment methodology requires an entity to measure, at each reporting date, the expected credit losses of financial assets not measured at fair value, such as loans, HTM debt securities, and loan commitments, over their contractual lives. Under the new impairment methodology, expected credit losses will be measured at each reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Additionally, the ASU amends the current credit loss measurements for AFS debt securities. Credit losses related to AFS debt securities will be recorded through the ACL rather than as a direct write-down as per current GAAP. The ASU also requires enhanced disclosures related to credit quality and significant estimates and judgments used by management when estimating credit losses. The ASU will become effective for the Company on October 1, 2020. The Company has formed a cross-functional working group comprised of individuals from various functional areas to assist with the implementation of the ASU. The Company is currently in the process of analyzing third-party vendor solutions to assist in the application of this ASU. While we are currently unable to reasonably estimate the impact of adopting this ASU, we expect the impact of adoption will be influenced by the composition of our loan and securities portfolios as well as the economic conditions and forecasts at the time of adoption. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging: Target Improvements to Accounting for Hedging Activities . The ASU amends the hedge accounting recognition and presentation requirements in current GAAP. The purpose of the ASU was to improve transparency of hedging relationships in the financial statements and to reduce the complexity of applying hedge accounting for preparers. The ASU will become effective for the Company on October 1, 2019. The Company is currently evaluating the effect of the ASU on the Company's consolidated financial condition, results of operations and disclosures. In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income. The ASU helps organizations address certain stranded income tax effects in AOCI resulting from the tax legislation enacted by the U.S. government on December 22, 2017 commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act") by allowing the reclassification of these amounts from AOCI to retained earnings. The effective date of this ASU for the Company is October 1, 2019, with early adoption permitted. The Company elected to early-adopt this ASU during the current fiscal year and reclassify the related tax effects from the enactment of the Tax Act, specifically those related to the change in the federal corporate tax rate, from AOCI to retained earnings. The reclassification was applied prospectively and is reflected in the Consolidated Statements of Stockholders' Equity. The Company releases the income tax effects of unrealized gains and losses related to AFS securities on a portfolio basis.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share, Basic And Diluted	Shares acquired by the ESOP are not considered in the basic average shares outstanding until the shares are committed for allocation or vested to an employee's individual account. Unvested shares awarded pursuant to the Company's restricted stock benefit plans are treated as participating securities in the computation of EPS pursuant to the two-class method as they contain nonforfeitable rights to dividends. The two-class method is an earnings allocation that determines EPS for each class of common stock and participating security. For the Three Months Ended For the Nine Months Ended June 30, June 30, 2018 2017 2018 2017 (Dollars in thousands, except per share amounts) Net income $ 22,372 $ 21,370 $ 77,538 $ 63,535 Income allocated to participating securities (9 ) (11 ) (32 ) (36 ) Net income available to common stockholders $ 22,363 $ 21,359 $ 77,506 $ 63,499 Average common shares outstanding 134,401,188 134,170,638 134,386,678 133,962,680 Average committed ESOP shares outstanding 83,052 83,052 41,602 41,601 Total basic average common shares outstanding 134,484,240 134,253,690 134,428,280 134,004,281 Effect of dilutive stock options 45,713 106,080 62,275 185,477 Total diluted average common shares outstanding 134,529,953 134,359,770 134,490,555 134,189,758 Net EPS: Basic $ 0.17 $ 0.16 $ 0.58 $ 0.47 Diluted $ 0.17 $ 0.16 $ 0.58 $ 0.47 Antidilutive stock options, excluded from the diluted average common shares outstanding calculation 578,777 492,360 541,493 202,718

Securities (Tables)

Securities (Tables)	9 Months Ended
	Jun. 30, 2018
Marketable Securities [Abstract]
Amortized Cost, Estimated Fair Value, And Gross Unrealized Gains And Losses Of AFS Securities	The following tables reflect the amortized cost, estimated fair value, and gross unrealized gains and losses of AFS and HTM securities at the dates presented. The majority of the MBS and investment securities portfolios are composed of securities issued by United States government-sponsored enterprises ("GSEs"). June 30, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 314,192 $ 3,917 $ 2,121 $ 315,988 GSE debentures 240,543 102 2,779 237,866 Municipal bonds 1,522 — 15 1,507 $ 556,257 $ 4,019 $ 4,915 $ 555,361 HTM: MBS $ 642,281 $ 5,124 $ 14,576 $ 632,829 Municipal bonds 22,241 3 108 22,136 $ 664,522 $ 5,127 $ 14,684 $ 654,965 September 30, 2017 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: GSE debentures $ 271,300 $ 16 $ 587 $ 270,729 MBS 135,644 5,923 51 141,516 Trust preferred securities 2,067 — 16 2,051 Municipal bonds 1,530 5 — 1,535 $ 410,541 $ 5,944 $ 654 $ 415,831 HTM: MBS $ 800,931 $ 10,460 $ 5,295 $ 806,096 Municipal bonds 26,807 119 13 26,913 $ 827,738 $ 10,579 $ 5,308 $ 833,009
Amortized Cost, Estimated Fair Value, And Gross Unrealized Gains And Losses Of HTM Securities	The following tables reflect the amortized cost, estimated fair value, and gross unrealized gains and losses of AFS and HTM securities at the dates presented. The majority of the MBS and investment securities portfolios are composed of securities issued by United States government-sponsored enterprises ("GSEs"). June 30, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 314,192 $ 3,917 $ 2,121 $ 315,988 GSE debentures 240,543 102 2,779 237,866 Municipal bonds 1,522 — 15 1,507 $ 556,257 $ 4,019 $ 4,915 $ 555,361 HTM: MBS $ 642,281 $ 5,124 $ 14,576 $ 632,829 Municipal bonds 22,241 3 108 22,136 $ 664,522 $ 5,127 $ 14,684 $ 654,965 September 30, 2017 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: GSE debentures $ 271,300 $ 16 $ 587 $ 270,729 MBS 135,644 5,923 51 141,516 Trust preferred securities 2,067 — 16 2,051 Municipal bonds 1,530 5 — 1,535 $ 410,541 $ 5,944 $ 654 $ 415,831 HTM: MBS $ 800,931 $ 10,460 $ 5,295 $ 806,096 Municipal bonds 26,807 119 13 26,913 $ 827,738 $ 10,579 $ 5,308 $ 833,009
Schedule Of Estimated Fair Value And Gross Unrealized Losses Of Securities In Continuous Unrealized Loss Position	The following tables summarize the estimated fair value and gross unrealized losses of those securities on which an unrealized loss at the dates presented was reported and the continuous unrealized loss position for less than 12 months and equal to or greater than 12 months as of the dates presented. June 30, 2018 Less Than 12 Months Equal to or Greater Than 12 Months Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses (Dollars in thousands) AFS: GSE debentures $ 123,539 $ 1,460 $ 98,653 $ 1,319 MBS 215,904 2,116 591 5 Municipal bonds 1,507 15 — — $ 340,950 $ 3,591 $ 99,244 $ 1,324 HTM: MBS $ 200,386 $ 4,206 $ 255,472 $ 10,370 Municipal bonds 18,229 108 — — $ 218,615 $ 4,314 $ 255,472 $ 10,370 September 30, 2017 Less Than 12 Months Equal to or Greater Than 12 Months Estimated Unrealized Estimated Unrealized Fair Value Losses Fair Value Losses (Dollars in thousands) AFS: GSE debentures $ 224,421 $ 539 $ 24,952 $ 48 MBS 9,648 46 673 5 Trust preferred securities — — 2,051 16 $ 234,069 $ 585 $ 27,676 $ 69 HTM: MBS $ 259,200 $ 1,582 $ 201,094 $ 3,713 Municipal bonds 5,638 8 1,460 5 $ 264,838 $ 1,590 $ 202,554 $ 3,718
Schedule Of Contractual Maturities	The amortized cost and estimated fair value of debt securities as of June 30, 2018 , by contractual maturity, are shown below. Actual principal repayments may differ from contractual maturities due to prepayment or early call privileges by the issuer. In the case of MBS, borrowers on the underlying loans generally have the right to prepay their loans without prepayment penalty. For this reason, MBS are not included in the maturity categories. AFS HTM Amortized Estimated Amortized Estimated Cost Fair Value Cost Fair Value (Dollars in thousands) One year or less $ 50,000 $ 49,758 $ 5,102 $ 5,098 One year through five years 192,065 189,615 17,139 17,038 242,065 239,373 22,241 22,136 MBS 314,192 315,988 642,281 632,829 $ 556,257 $ 555,361 $ 664,522 $ 654,965
Schedule Of Taxable And Non-taxable Components Of Interest Income	The following table presents the taxable and non-taxable components of interest income on investment securities for the periods presented. For the Three Months Ended For the Nine Months Ended June 30, June 30, 2018 2017 2018 2017 (Dollars in thousands) Taxable $ 1,214 $ 941 $ 3,092 $ 2,905 Non-taxable 93 122 303 396 $ 1,307 $ 1,063 $ 3,395 $ 3,301
Schedule Of Carrying Value Of Securities Pledged As Collateral	The following table summarizes the carrying value of securities pledged as collateral for the obligations indicated below as of the dates presented. June 30, 2018 September 30, 2017 (Dollars in thousands) Public unit deposits $ 454,721 $ 499,993 Repurchase agreements 108,546 214,298 Federal Reserve Bank of Kansas City ("FRB of Kansas City") 7,959 11,769 $ 571,226 $ 726,060

Loans Receivable And Allowanc21

Loans Receivable And Allowance For Credit Losses (Tables)	9 Months Ended
	Jun. 30, 2018
Loans and Leases Receivable Disclosure [Abstract]
Summary of Loans Receivable	Loans receivable, net at the dates presented is summarized as follows: June 30, 2018 September 30, 2017 (Dollars in thousands) Real estate loans: One- to four-family: Originated $ 3,931,251 $ 3,959,232 Correspondent purchased 2,514,929 2,445,311 Bulk purchased 309,837 351,705 Construction 27,565 30,647 Total 6,783,582 6,786,895 Commercial: Permanent 274,410 183,030 Construction 44,645 86,952 Total 319,055 269,982 Total real estate loans 7,102,637 7,056,877 Consumer loans: Home equity 119,079 122,066 Other 4,453 3,808 Total consumer loans 123,532 125,874 Total loans receivable 7,226,169 7,182,751 Less: ACL 8,344 8,398 Discounts/unearned loan fees 25,124 24,962 Premiums/deferred costs (46,683 ) (45,680 ) $ 7,239,384 $ 7,195,071
Recorded Investment in Loans, Past Due	The following tables present the recorded investment, by class, in loans 30 to 89 days delinquent, loans 90 or more days delinquent or in foreclosure, total delinquent loans, current loans, and total recorded investment at the dates presented. The recorded investment in loans is defined as the unpaid principal balance of a loan, less charge-offs and inclusive of unearned loan fees and deferred costs. At June 30, 2018 and September 30, 2017 , all loans 90 or more days delinquent were on nonaccrual status. June 30, 2018 90 or More Days Total Total 30 to 89 Days Delinquent or Delinquent Current Recorded Delinquent in Foreclosure Loans Loans Investment (Dollars in thousands) One- to four-family - originated $ 7,614 $ 5,028 $ 12,642 $ 3,932,144 $ 3,944,786 One- to four-family - correspondent 1,776 880 2,656 2,547,714 2,550,370 One- to four-family - bulk purchased 3,802 2,612 6,414 304,863 311,277 Commercial real estate 41 — 41 317,722 317,763 Consumer - home equity 341 423 764 118,315 119,079 Consumer - other 22 2 24 4,429 4,453 $ 13,596 $ 8,945 $ 22,541 $ 7,225,187 $ 7,247,728 September 30, 2017 90 or More Days Total Total 30 to 89 Days Delinquent or Delinquent Current Recorded Delinquent in Foreclosure Loans Loans Investment (Dollars in thousands) One- to four-family - originated $ 13,216 $ 5,500 $ 18,716 $ 3,956,598 $ 3,975,314 One- to four-family - correspondent 1,855 92 1,947 2,477,916 2,479,863 One- to four-family - bulk purchased 3,233 3,399 6,632 346,807 353,439 Commercial real estate — — — 268,979 268,979 Consumer - home equity 467 406 873 121,193 122,066 Consumer - other 33 4 37 3,771 3,808 $ 18,804 $ 9,401 $ 28,205 $ 7,175,264 $ 7,203,469
Recorded Investment in Loans, Nonaccrual	The following table presents the recorded investment, by class, in loans classified as nonaccrual at the dates presented. June 30, 2018 September 30, 2017 (Dollars in thousands) One- to four-family - originated $ 7,490 $ 10,054 One- to four-family - correspondent 977 1,804 One- to four-family - bulk purchased 2,964 4,264 Commercial real estate — — Consumer - home equity 492 519 Consumer - other 2 4 $ 11,925 $ 16,645
Recorded Investment in Classified Loans	The following table sets forth the recorded investment in loans classified as special mention or substandard, by class, at the dates presented. Special mention and substandard loans are included in the ACL formula analysis model if the loans are not individually evaluated for loss. Loans classified as doubtful or loss are individually evaluated for loss. At the dates presented, there were no loans classified as doubtful, and all loans classified as loss were fully charged-off. June 30, 2018 September 30, 2017 Special Mention Substandard Special Mention Substandard (Dollars in thousands) One- to four-family - originated $ 8,867 $ 22,892 $ 7,031 $ 30,059 One- to four-family - correspondent 885 3,497 261 3,800 One- to four-family - bulk purchased — 6,765 — 8,005 Commercial real estate 41 — — — Consumer - home equity 286 889 9 1,032 Consumer - other — 3 — 4 $ 10,079 $ 34,046 $ 7,301 $ 42,900
Weighted Average Loan-to-Value and Credit Score Information	The following table shows the weighted average credit score and weighted average LTV for one- to four-family loans and consumer home equity loans at the dates presented. Borrower credit scores are intended to provide an indication as to the likelihood that a borrower will repay their debts. Credit scores are updated at least semiannually, with the last update in March 2018, from a nationally recognized consumer rating agency. The LTV ratios provide an estimate of the extent to which the Bank may incur a loss on any given loan that may go into foreclosure. The consumer - home equity LTV does not take into account the first lien position, if applicable. The LTV ratios were based on the current loan balance and either the lesser of the purchase price or original appraisal, or the most recent Bank appraisal, if available. In most cases, the most recent appraisal was obtained at the time of origination. June 30, 2018 September 30, 2017 Credit Score LTV Credit Score LTV One- to four-family - originated 768 63 % 767 63 % One- to four-family - correspondent 764 67 764 68 One- to four-family - bulk purchased 759 62 757 63 Consumer - home equity 755 19 755 19 766 63 765 64
Troubled Debt Restructurings on Financing Receivables	The following tables present the recorded investment prior to restructuring and immediately after restructuring in all loans restructured during the periods presented. These tables do not reflect the recorded investment at the end of the periods indicated. Any increase in the recorded investment at the time of the restructuring was generally due to the capitalization of delinquent interest and/or escrow balances. During the fourth quarter of fiscal year 2017, management refined its methodology for assessing whether a loan modification qualifies as a TDR which, though not material, resulted in fewer loans being classified as TDRs in the current fiscal year. For the Three Months Ended For the Nine Months Ended June 30, 2018 June 30, 2018 Number Pre- Post- Number Pre- Post- of Restructured Restructured of Restructured Restructured Contracts Outstanding Outstanding Contracts Outstanding Outstanding (Dollars in thousands) One- to four-family - originated 1 $ 40 $ 47 4 $ 207 $ 223 One- to four-family - correspondent 1 97 97 1 97 97 One- to four-family - bulk purchased — — — — — — Commercial real estate — — — — — — Consumer - home equity — — — — — — Consumer - other — — — — — — 2 $ 137 $ 144 5 $ 304 $ 320 For the Three Months Ended For the Nine Months Ended June 30, 2017 June 30, 2017 Number Pre- Post- Number Pre- Post- of Restructured Restructured of Restructured Restructured Contracts Outstanding Outstanding Contracts Outstanding Outstanding (Dollars in thousands) One- to four-family - originated 28 $ 2,447 $ 2,518 109 $ 11,735 $ 12,195 One- to four-family - correspondent 7 1,435 1,443 10 1,695 1,704 One- to four-family - bulk purchased 1 344 348 3 1,031 1,048 Commercial real estate — — — — — — Consumer - home equity 3 51 53 17 368 380 Consumer - other — — — — — — 39 $ 4,277 $ 4,362 139 $ 14,829 $ 15,327 The following table provides information on TDRs that became delinquent during the periods presented within 12 months after being restructured. For the Three Months Ended For the Nine Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Number of Recorded Number of Recorded Number of Recorded Number of Recorded Contracts Investment Contracts Investment Contracts Investment Contracts Investment (Dollars in thousands) One- to four-family - originated 1 $ 34 14 $ 1,439 20 $ 1,288 36 $ 3,486 One- to four-family - correspondent — — 1 119 1 124 1 119 One- to four-family - bulk purchased — — 1 354 3 1,040 1 354 Commercial real estate — — — — — — — — Consumer - home equity — — 6 93 4 133 15 432 Consumer - other — — — — — — — — 1 $ 34 22 $ 2,005 28 $ 2,585 53 $ 4,391
Impaired Loans by Class	The following information pertains to impaired loans, by class, as of the dates presented. All impaired loans were individually evaluated for loss and all losses were charged-off, resulting in no related ACL for these loans. June 30, 2018 September 30, 2017 Unpaid Unpaid Recorded Principal Recorded Principal Investment Balance Investment Balance (Dollars in thousands) One- to four-family - originated $ 20,662 $ 21,329 $ 30,251 $ 30,953 One- to four-family - correspondent 2,926 3,023 3,800 3,771 One- to four-family - bulk purchased 6,041 7,005 7,403 8,606 Commercial real estate — — — — Consumer - home equity 535 767 775 997 Consumer - other — 29 — 24 $ 30,164 $ 32,153 $ 42,229 $ 44,351 The following information pertains to impaired loans, by class, for the periods presented. During the fourth quarter of fiscal year 2017, management refined its methodology for classifying loans as impaired. The change resulting from this refinement was immaterial. Impaired loans include loans partially charged-off and TDRs. For the Three Months Ended For the Nine Months Ended June 30, 2018 June 30, 2017 June 30, 2018 June 30, 2017 Average Interest Average Interest Average Interest Average Interest Recorded Income Recorded Income Recorded Income Recorded Income Investment Recognized Investment Recognized Investment Recognized Investment Recognized (Dollars in thousands) With no related allowance recorded One- to four-family - originated $ 21,939 $ 236 $ 24,342 $ 230 $ 25,254 $ 784 $ 23,478 $ 653 One- to four-family - correspondent 3,055 24 3,497 32 3,351 88 3,463 91 One- to four-family - bulk purchased 6,113 48 9,950 49 6,563 143 10,490 144 Commercial real estate — — — — — — — — Consumer - home equity 552 10 1,095 12 609 29 1,043 75 Consumer - other — — 4 — — — 8 — 31,659 318 38,888 323 35,777 1,044 38,482 963 With an allowance recorded One- to four-family - originated — — 12,787 117 — — 12,878 367 One- to four-family - correspondent — — 2,405 20 — — 2,150 52 One- to four-family - bulk purchased — — 1,136 7 — — 1,358 17 Commercial real estate — — — — — — — — Consumer - home equity — — 444 4 — — 525 33 Consumer - other — — 12 — — — 12 — — — 16,784 148 — — 16,923 469 Total One- to four-family - originated 21,939 236 37,129 347 25,254 784 36,356 1,020 One- to four-family - correspondent 3,055 24 5,902 52 3,351 88 5,613 143 One- to four-family - bulk purchased 6,113 48 11,086 56 6,563 143 11,848 161 Commercial real estate — — — — — — — — Consumer - home equity 552 10 1,539 16 609 29 1,568 108 Consumer - other — — 16 — — — 20 — $ 31,659 $ 318 $ 55,672 $ 471 $ 35,777 $ 1,044 $ 55,405 $ 1,432
Allowance for Credit Losses	The following is a summary of the loan portfolio and related ACL balances, at the dates presented, by loan portfolio segment disaggregated by the Company's impairment method. There was no ACL for loans individually evaluated for impairment at either date as all losses were charged-off. June 30, 2018 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,924,124 $ 2,547,444 $ 305,236 $ 6,776,804 $ 317,763 $ 122,997 $ 7,217,564 Recorded investment in loans individually evaluated for impairment 20,662 2,926 6,041 29,629 — 535 30,164 $ 3,944,786 $ 2,550,370 $ 311,277 $ 6,806,433 $ 317,763 $ 123,532 $ 7,247,728 ACL for loans collectively evaluated for impairment $ 3,029 $ 1,923 $ 1,000 $ 5,952 $ 2,230 $ 162 $ 8,344 September 30, 2017 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,945,063 $ 2,476,063 $ 346,035 $ 6,767,161 $ 268,979 $ 125,100 $ 7,161,240 Recorded investment in loans individually evaluated for impairment 30,251 3,800 7,404 41,455 — 774 42,229 $ 3,975,314 $ 2,479,863 $ 353,439 $ 6,808,616 $ 268,979 $ 125,874 $ 7,203,469 ACL for loans collectively evaluated for impairment $ 3,173 $ 1,922 $ 1,000 $ 6,095 $ 2,112 $ 191 $ 8,398 The following is a summary of ACL activity, by loan portfolio segment, for the periods presented, and the ending balance of ACL based on the Company's impairment methodology. For the Three Months Ended June 30, 2018 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,156 $ 2,034 $ 1,000 $ 6,190 $ 2,038 $ 162 $ 8,390 Charge-offs (51 ) — — (51 ) — (3 ) (54 ) Recoveries 4 — — 4 — 4 8 Provision for credit losses (80 ) (111 ) — (191 ) 192 (1 ) — Ending balance $ 3,029 $ 1,923 $ 1,000 $ 5,952 $ 2,230 $ 162 $ 8,344 For the Nine Months Ended June 30, 2018 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,173 $ 1,922 $ 1,000 $ 6,095 $ 2,112 $ 191 $ 8,398 Charge-offs (122 ) (128 ) — (250 ) — (38 ) (288 ) Recoveries 21 — 196 217 — 17 234 Provision for credit losses (43 ) 129 (196 ) (110 ) 118 (8 ) — Ending balance $ 3,029 $ 1,923 $ 1,000 $ 5,952 $ 2,230 $ 162 $ 8,344 For the Three Months Ended June 30, 2017 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,351 $ 1,940 $ 1,000 $ 6,291 $ 1,885 $ 271 $ 8,447 Charge-offs (4 ) — (25 ) (29 ) — (12 ) (41 ) Recoveries 3 — 69 72 — 8 80 Provision for credit losses (128 ) (24 ) (44 ) (196 ) 204 (8 ) — Ending balance $ 3,222 $ 1,916 $ 1,000 $ 6,138 $ 2,089 $ 259 $ 8,486 For the Nine Months Ended June 30, 2017 One- to Four-Family Correspondent Bulk Commercial Originated Purchased Purchased Total Real Estate Consumer Total (Dollars in thousands) Beginning balance $ 3,928 $ 2,102 $ 1,065 $ 7,095 $ 1,208 $ 237 $ 8,540 Charge-offs (45 ) — (73 ) (118 ) — (37 ) (155 ) Recoveries 3 — 69 72 — 29 101 Provision for credit losses (664 ) (186 ) (61 ) (911 ) 881 30 — Ending balance $ 3,222 $ 1,916 $ 1,000 $ 6,138 $ 2,089 $ 259 $ 8,486

Fair Value Of Financial Instr22

Fair Value Of Financial Instruments (Tables)	9 Months Ended
	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Schedule Of Fair Value Assets Measured On A Recurring Basis	The following tables provide the level of valuation assumption used to determine the carrying value of the Company's financial instruments measured at fair value on a recurring basis at the dates presented. June 30, 2018 Quoted Prices Significant Significant in Active Markets Other Observable Unobservable Carrying for Identical Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) (Dollars in thousands) Assets: AFS Securities: GSE debentures $ 237,866 $ — $ 237,866 $ — MBS 315,988 — 315,988 — Municipal bonds 1,507 — 1,507 — 555,361 — 555,361 — Interest Rate Swaps 5,868 — 5,868 — $ 561,229 $ — $ 561,229 $ — September 30, 2017 Quoted Prices Significant Significant in Active Markets Other Observable Unobservable Carrying for Identical Assets Inputs Inputs Value (Level 1) (Level 2) (Level 3) (Dollars in thousands) Assets: AFS Securities: GSE debentures $ 270,729 $ — $ 270,729 $ — MBS 141,516 — 141,516 — Municipal bonds 1,535 — 1,535 — Trust preferred securities 2,051 — — 2,051 $ 415,831 $ — $ 413,780 $ 2,051 Liabilities: Interest Rate Swaps $ 598 $ — $ 598 $ —
Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments	The carrying amounts and estimated fair values of the Company's financial instruments, at the dates presented, were as follows: June 30, 2018 September 30, 2017 Estimated Estimated Carrying Fair Carrying Fair Amount Value Amount Value (Dollars in thousands) Assets: Cash and cash equivalents $ 182,078 $ 182,078 $ 351,659 $ 351,659 AFS securities 555,361 555,361 415,831 415,831 HTM securities 664,522 654,965 827,738 833,009 Loans receivable 7,239,384 7,169,554 7,195,071 7,354,100 FHLB stock 100,694 100,694 100,954 100,954 Interest rate swaps 5,868 5,868 — — Liabilities: Deposits 5,323,083 5,293,281 5,309,868 5,318,249 FHLB borrowings 2,174,816 2,148,525 2,173,808 2,182,841 Repurchase agreements 100,000 99,244 200,000 202,004 Interest rate swaps — — 598 598

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	9 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following tables present the changes in the components of AOCI, net of tax, for the three and nine months ended June 30, 2018 . During the three and nine months ended June 30, 2017 , the only changes in AOCI, net of tax, were related to unrealized gains (losses) on AFS securities and there were no amounts reclassified from AOCI. For the Three Months Ended June 30, 2018 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (dollars in thousands) Beginning balance $ 687 $ 4,472 $ 5,159 Other comprehensive income (loss), before reclassifications (1,366 ) (1 ) (1,367 ) Amount reclassified from AOCI — (29 ) (29 ) Other comprehensive income (loss) (1,366 ) (30 ) (1,396 ) Ending balance $ (679 ) $ 4,442 $ 3,763 For the Nine Months Ended June 30, 2018 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (dollars in thousands) Beginning balance $ 3,290 $ (372 ) $ 2,918 Other comprehensive income (loss), before reclassifications (4,430 ) 5,051 621 Amount reclassified from AOCI — (443 ) (443 ) Other comprehensive income (loss) (4,430 ) 4,608 178 Reclassification of certain income tax effects related to adoption of ASU 2018-02 461 206 667 Ending balance $ (679 ) $ 4,442 $ 3,763

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share
Net income	$ 22,372	$ 21,370	$ 77,538	$ 63,535
Income allocated to participating securities	(9)	(11)	(32)	(36)
Net income available to common stockholders	$ 22,363	$ 21,359	$ 77,506	$ 63,499
Total basic average common shares outstanding	134,484,240	134,253,690	134,428,280	134,004,281
Effect of dilutive stock options	45,713	106,080	62,275	185,477
Total diluted average common shares outstanding	134,529,953	134,359,770	134,490,555	134,189,758
Net EPS:
Basic	$ 0.17	$ 0.16	$ 0.58	$ 0.47
Diluted	$ 0.17	$ 0.16	$ 0.58	$ 0.47
Antidilutive stock options, excluded from the diluted average common shares outstanding calculation	578,777	492,360	541,493	202,718
Average Common Shares Outstanding [Member]
Earnings Per Share
Total basic average common shares outstanding	134,401,188	134,170,638	134,386,678	133,962,680
Average Committed ESOP Shares Outstanding [Member]
Earnings Per Share
Total basic average common shares outstanding	83,052	83,052	41,602	41,601

Securities (Narrative) (Details

Securities (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2018	Sep. 30, 2017
Marketable Securities [Abstract]
Other than temporary impairments, amount	$ 0	$ 0
Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds received from sale of AFS securities	2,100
Gain on sale of AFS securities	$ 9

Securities (Amortized Cost, Est

Securities (Amortized Cost, Estimated Fair Value, and Gross Unrealized Gains and Losses of AFS and HTM Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	$ 556,257	$ 410,541
Available-for-sale Securities, Gross Unrealized Gains	4,019	5,944
Available-for-sale Securities, Gross Unrealized Losses	4,915	654
Available-for-sale Securities, Estimated Fair Value	555,361	415,831
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	664,522	827,738
Held-to-maturity Securities, Gross Unrealized Gains	5,127	10,579
Held-to-maturity Securities, Gross Unrealized Losses	14,684	5,308
Held-to-maturity securities, Estimated Fair Value	654,965	833,009
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	314,192	135,644
Available-for-sale Securities, Gross Unrealized Gains	3,917	5,923
Available-for-sale Securities, Gross Unrealized Losses	2,121	51
Available-for-sale Securities, Estimated Fair Value	315,988	141,516
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	642,281	800,931
Held-to-maturity Securities, Gross Unrealized Gains	5,124	10,460
Held-to-maturity Securities, Gross Unrealized Losses	14,576	5,295
Held-to-maturity securities, Estimated Fair Value	632,829	806,096
GSE Debentures [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	240,543	271,300
Available-for-sale Securities, Gross Unrealized Gains	102	16
Available-for-sale Securities, Gross Unrealized Losses	2,779	587
Available-for-sale Securities, Estimated Fair Value	237,866	270,729
Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost		2,067
Available-for-sale Securities, Gross Unrealized Gains		0
Available-for-sale Securities, Gross Unrealized Losses		16
Available-for-sale Securities, Estimated Fair Value		2,051
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	1,522	1,530
Available-for-sale Securities, Gross Unrealized Gains	0	5
Available-for-sale Securities, Gross Unrealized Losses	15	0
Available-for-sale Securities, Estimated Fair Value	1,507	1,535
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	22,241	26,807
Held-to-maturity Securities, Gross Unrealized Gains	3	119
Held-to-maturity Securities, Gross Unrealized Losses	108	13
Held-to-maturity securities, Estimated Fair Value	$ 22,136	$ 26,913

Securities (Schedule Of Estimat

Securities (Schedule Of Estimated Fair Value And Gross Unrealized Losses Of Securities In Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	$ 340,950	$ 234,069
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	3,591	585
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	99,244	27,676
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	1,324	69
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	218,615	264,838
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	4,314	1,590
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	255,472	202,554
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	10,370	3,718
GSE Debentures [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	123,539	224,421
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	1,460	539
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	98,653	24,952
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	1,319	48
MBS [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	215,904	9,648
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	2,116	46
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	591	673
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	5	5
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	200,386	259,200
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	4,206	1,582
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	255,472	201,094
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	10,370	3,713
Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value		2,051
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses		16
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	1,507
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	15
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	18,229	5,638
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	108	8
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	0	1,460
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	$ 0	$ 5

Securities (Schedule Of Contrac

Securities (Schedule Of Contractual Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Investment Holdings [Line Items]
Available-for-sale Securities, Amortized Cost	$ 556,257	$ 410,541
Available-for-sale Securities, Estimated Fair Value	555,361	415,831
Held-to-maturity Securities, Amortized Cost	664,522	827,738
Held-to-maturity Securities, Estimated Fair Value	654,965	833,009
Debt Securities [Member]
Investment Holdings [Line Items]
Available-for-sale Securities, One year or less, Amortized Cost	50,000
Available-for-sale Securities, One year through five years, Amortized Cost	192,065
Available-for-sale Securities, Amortized Cost	242,065
Available-for-sale Securities, One year or less, Estimated Fair Value	49,758
Available-for-sale Securities, One year through five years, Estimated Fair Value	189,615
Available-for-sale Securities, Estimated Fair Value	239,373
Held-to-maturity Securities, One year or less, Amortized Cost	5,102
Held-to-maturity Securities, One year through five years, Amortized Cost	17,139
Held-to-maturity Securities, Amortized Cost	22,241
Held-to-maturity Securities, One year or less, Estimated Fair Value	5,098
Held-to-maturity Securities, One year through five years, Estimated Fair Value	17,038
Held-to-maturity Securities, Estimated Fair Value	22,136
MBS [Member]
Investment Holdings [Line Items]
Available-for-sale Securities, Amortized Cost	314,192	135,644
Available-for-sale Securities, Estimated Fair Value	315,988	141,516
Held-to-maturity Securities, Amortized Cost	642,281	800,931
Held-to-maturity Securities, Estimated Fair Value	$ 632,829	$ 806,096

Securities (Schedule Of Taxable

Securities (Schedule Of Taxable And Non-taxable Components Of Interest Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Marketable Securities [Abstract]
Taxable	$ 1,214	$ 941	$ 3,092	$ 2,905
Non-taxable	93	122	303	396
Interest income on investment securities	$ 1,307	$ 1,063	$ 3,395	$ 3,301

Securities (Schedule Of Carryin

Securities (Schedule Of Carrying Value Of Securities Pledged As Collateral) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Marketable Securities [Abstract]
Public unit deposits	$ 454,721	$ 499,993
Repurchase agreements	108,546	214,298
Federal Reserve Bank of Kansas City (FRB of Kansas City)	7,959	11,769
Total securities pledged as collateral	$ 571,226	$ 726,060

Loans Receivable And Allowanc31

Loans Receivable And Allowance For Credit Losses (Narrative) (Details) $ in Thousands	Jun. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)
Loans Receivable [Line Items]
Loan-to-value ratio securing commercial real estate loans, maximum	80.00%
Debt service coverage ratio for commercial real estate loans, minimum	1.25
Recorded investment of loans in process of foreclosure	$ 2,800	$ 4,300
Carrying value of residential OREO	897	1,400
Loans receivable	7,239,384	7,195,071
ACL maintained for impaired loans	0	0
ACL maintained for loans individually evaluated for impairment	0	0	$ 0
Doubtful [Member]
Loans Receivable [Line Items]
Loans receivable	$ 0	$ 0

Loans Receivable And Allowanc32

Loans Receivable And Allowance For Credit Losses (Summary Of Loans Receivable) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Loans Receivable [Line Items]
Loans receivable, gross	$ 7,226,169	$ 7,182,751
Total real estate loans	7,102,637	7,056,877
ACL	8,344	8,398
Discounts/unearned loan fees	25,124	24,962
Premiums/deferred costs	(46,683)	(45,680)
Loans receivable, net	7,239,384	7,195,071
One- to Four-Family Segment [Member]
Loans Receivable [Line Items]
Loans receivable, gross	6,783,582	6,786,895
One- to Four-Family Segment [Member] | Originated [Member]
Loans Receivable [Line Items]
Loans receivable, gross	3,931,251	3,959,232
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Loans Receivable [Line Items]
Loans receivable, gross	2,514,929	2,445,311
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Loans Receivable [Line Items]
Loans receivable, gross	309,837	351,705
One- to Four-Family Segment [Member] | Construction [Member]
Loans Receivable [Line Items]
Loans receivable, gross	27,565	30,647
Commercial Real Estate Segment [Member]
Loans Receivable [Line Items]
Loans receivable, gross	319,055	269,982
Commercial Real Estate Segment [Member] | Construction [Member]
Loans Receivable [Line Items]
Loans receivable, gross	44,645	86,952
Commercial Real Estate Segment [Member] | Permanent [Member]
Loans Receivable [Line Items]
Loans receivable, gross	274,410	183,030
Consumer Segment [Member]
Loans Receivable [Line Items]
Loans receivable, gross	123,532	125,874
Consumer Segment [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Loans receivable, gross	119,079	122,066
Consumer Segment [Member] | Other [Member]
Loans Receivable [Line Items]
Loans receivable, gross	$ 4,453	$ 3,808

Loans Receivable And Allowanc33

Loans Receivable And Allowance For Credit Losses (Recorded Investment in Loans, Past Due) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	$ 22,541	$ 28,205
Financing receivable, current loans	7,225,187	7,175,264
Financing receivable, total recorded investment	7,247,728	7,203,469
Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	13,596	18,804
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	8,945	9,401
One- to Four-Family Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total recorded investment	6,806,433	6,808,616
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	12,642	18,716
Financing receivable, current loans	3,932,144	3,956,598
Financing receivable, total recorded investment	3,944,786	3,975,314
One- to Four-Family Segment [Member] | Originated [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	7,614	13,216
One- to Four-Family Segment [Member] | Originated [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	5,028	5,500
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	2,656	1,947
Financing receivable, current loans	2,547,714	2,477,916
Financing receivable, total recorded investment	2,550,370	2,479,863
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	1,776	1,855
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	880	92
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	6,414	6,632
Financing receivable, current loans	304,863	346,807
Financing receivable, total recorded investment	311,277	353,439
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	3,802	3,233
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	2,612	3,399
Commercial Real Estate Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	41	0
Financing receivable, current loans	317,722	268,979
Financing receivable, total recorded investment	317,763	268,979
Commercial Real Estate Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	41	0
Commercial Real Estate Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	0	0
Consumer Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total recorded investment	123,532	125,874
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	764	873
Financing receivable, current loans	118,315	121,193
Financing receivable, total recorded investment	119,079	122,066
Consumer Segment [Member] | Home Equity [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	341	467
Consumer Segment [Member] | Home Equity [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	423	406
Consumer Segment [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	24	37
Financing receivable, current loans	4,429	3,771
Financing receivable, total recorded investment	4,453	3,808
Consumer Segment [Member] | Other [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	22	33
Consumer Segment [Member] | Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	$ 2	$ 4

Loans Receivable And Allowanc34

Loans Receivable And Allowance For Credit Losses (Recorded Investment in Loans, Nonaccrual) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	$ 11,925	$ 16,645
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	7,490	10,054
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	977	1,804
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	2,964	4,264
Commercial Real Estate Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	0	0
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	492	519
Consumer Segment [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	$ 2	$ 4

Loans Receivable And Allowanc35

Loans Receivable And Allowance For Credit Losses (Recorded Investment In Classified Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	$ 7,247,728	$ 7,203,469
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	10,079	7,301
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	34,046	42,900
One- to Four-Family Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	6,806,433	6,808,616
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	3,944,786	3,975,314
One- to Four-Family Segment [Member] | Originated [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	8,867	7,031
One- to Four-Family Segment [Member] | Originated [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	22,892	30,059
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	2,550,370	2,479,863
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	885	261
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	3,497	3,800
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	311,277	353,439
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	0	0
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	6,765	8,005
Commercial Real Estate Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	317,763	268,979
Commercial Real Estate Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	41	0
Commercial Real Estate Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	0	0
Consumer Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	123,532	125,874
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	119,079	122,066
Consumer Segment [Member] | Home Equity [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	286	9
Consumer Segment [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	889	1,032
Consumer Segment [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	4,453	3,808
Consumer Segment [Member] | Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	0	0
Consumer Segment [Member] | Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	$ 3	$ 4

Loans Receivable And Allowanc36

Loans Receivable And Allowance For Credit Losses (LTV And Credit Score Information For Originated, Correspondent Purchased, And Bulk Purchased One-To Four-Family Loans And Originated Consumer Home Equity Loans) (Details) - credit_score	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	766	765
Weighted average LTV	63.00%	64.00%
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	768	767
Weighted average LTV	63.00%	63.00%
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	764	764
Weighted average LTV	67.00%	68.00%
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	759	757
Weighted average LTV	62.00%	63.00%
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	755	755
Weighted average LTV	19.00%	19.00%

Loans Receivable And Allowanc37

Loans Receivable And Allowance For Credit Losses (Troubled Debt Restructurings On Financing Receivables) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	2	39	5	139
Pre-Restructured Outstanding	$ 137	$ 4,277	$ 304	$ 14,829
Post-Restructured Outstanding	$ 144	$ 4,362	$ 320	$ 15,327
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	28	4	109
Pre-Restructured Outstanding	$ 40	$ 2,447	$ 207	$ 11,735
Post-Restructured Outstanding	$ 47	$ 2,518	$ 223	$ 12,195
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	7	1	10
Pre-Restructured Outstanding	$ 97	$ 1,435	$ 97	$ 1,695
Post-Restructured Outstanding	$ 97	$ 1,443	$ 97	$ 1,704
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1	0	3
Pre-Restructured Outstanding	$ 0	$ 344	$ 0	$ 1,031
Post-Restructured Outstanding	$ 0	$ 348	$ 0	$ 1,048
Commercial Real Estate Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Pre-Restructured Outstanding	$ 0	$ 0	$ 0	$ 0
Post-Restructured Outstanding	$ 0	$ 0	$ 0	$ 0
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	3	0	17
Pre-Restructured Outstanding	$ 0	$ 51	$ 0	$ 368
Post-Restructured Outstanding	$ 0	$ 53	$ 0	$ 380
Consumer Segment [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Pre-Restructured Outstanding	$ 0	$ 0	$ 0	$ 0
Post-Restructured Outstanding	$ 0	$ 0	$ 0	$ 0

Loans Receivable And Allowanc38

Loans Receivable And Allowance For Credit Losses (Troubled Debt Restructurings On Financing Receivables That Subsequently Defaulted) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract	Jun. 30, 2018USD ($)contract	Jun. 30, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	22	28	53
Recorded Investment | $	$ 34	$ 2,005	$ 2,585	$ 4,391
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	14	20	36
Recorded Investment | $	$ 34	$ 1,439	$ 1,288	$ 3,486
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1	1	1
Recorded Investment | $	$ 0	$ 119	$ 124	$ 119
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1	3	1
Recorded Investment | $	$ 0	$ 354	$ 1,040	$ 354
Commercial Real Estate Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	6	4	15
Recorded Investment | $	$ 0	$ 93	$ 133	$ 432
Consumer Segment [Member] | Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0

Loans Receivable And Allowanc39

Loans Receivable And Allowance For Credit Losses (Impaired Loans By Class, Instant Related Disclosures) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 30,164	$ 42,229
Unpaid Principal Balance	32,153	44,351
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	20,662	30,251
Unpaid Principal Balance	21,329	30,953
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,926	3,800
Unpaid Principal Balance	3,023	3,771
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,041	7,403
Unpaid Principal Balance	7,005	8,606
Commercial Real Estate Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	535	775
Unpaid Principal Balance	767	997
Consumer Segment [Member] | Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	$ 29	$ 24

Loans Receivable And Allowanc40

Loans Receivable And Allowance For Credit Losses (Impaired Loans By Class, Duration Related Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	$ 31,659	$ 38,888	$ 35,777	$ 38,482
Average Recorded Investment, Allowance Recorded	0	16,784	0	16,923
Average Recorded Investment	31,659	55,672	35,777	55,405
Interest Income Recognized, No Related Allowance	318	323	1,044	963
Interest Income Recognized, Allowance Recorded	0	148	0	469
Interest Income Recognized	318	471	1,044	1,432
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	21,939	24,342	25,254	23,478
Average Recorded Investment, Allowance Recorded	0	12,787	0	12,878
Average Recorded Investment	21,939	37,129	25,254	36,356
Interest Income Recognized, No Related Allowance	236	230	784	653
Interest Income Recognized, Allowance Recorded	0	117	0	367
Interest Income Recognized	236	347	784	1,020
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	3,055	3,497	3,351	3,463
Average Recorded Investment, Allowance Recorded	0	2,405	0	2,150
Average Recorded Investment	3,055	5,902	3,351	5,613
Interest Income Recognized, No Related Allowance	24	32	88	91
Interest Income Recognized, Allowance Recorded	0	20	0	52
Interest Income Recognized	24	52	88	143
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	6,113	9,950	6,563	10,490
Average Recorded Investment, Allowance Recorded	0	1,136	0	1,358
Average Recorded Investment	6,113	11,086	6,563	11,848
Interest Income Recognized, No Related Allowance	48	49	143	144
Interest Income Recognized, Allowance Recorded	0	7	0	17
Interest Income Recognized	48	56	143	161
Commercial Real Estate Segment [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	0	0	0	0
Average Recorded Investment, Allowance Recorded	0	0	0	0
Average Recorded Investment	0	0	0	0
Interest Income Recognized, No Related Allowance	0	0	0	0
Interest Income Recognized, Allowance Recorded	0	0	0	0
Interest Income Recognized	0	0	0	0
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	552	1,095	609	1,043
Average Recorded Investment, Allowance Recorded	0	444	0	525
Average Recorded Investment	552	1,539	609	1,568
Interest Income Recognized, No Related Allowance	10	12	29	75
Interest Income Recognized, Allowance Recorded	0	4	0	33
Interest Income Recognized	10	16	29	108
Consumer Segment [Member] | Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment, No Related Allowance	0	4	0	8
Average Recorded Investment, Allowance Recorded	0	12	0	12
Average Recorded Investment	0	16	0	20
Interest Income Recognized, No Related Allowance	0	0	0	0
Interest Income Recognized, Allowance Recorded	0	0	0	0
Interest Income Recognized	$ 0	$ 0	$ 0	$ 0

Loans Receivable And Allowanc41

Loans Receivable And Allowance For Credit Losses (Allowance For Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 8,390	$ 8,447	$ 8,398	$ 8,540
Charge-offs	(54)	(41)	(288)	(155)
Recoveries	8	80	234	101
Provision for credit losses	0	0	0	0
Ending Balance	8,344	8,486	8,344	8,486
One- to Four-Family Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	6,190	6,291	6,095	7,095
Charge-offs	(51)	(29)	(250)	(118)
Recoveries	4	72	217	72
Provision for credit losses	(191)	(196)	(110)	(911)
Ending Balance	5,952	6,138	5,952	6,138
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,156	3,351	3,173	3,928
Charge-offs	(51)	(4)	(122)	(45)
Recoveries	4	3	21	3
Provision for credit losses	(80)	(128)	(43)	(664)
Ending Balance	3,029	3,222	3,029	3,222
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,034	1,940	1,922	2,102
Charge-offs	0	0	(128)	0
Recoveries	0	0	0	0
Provision for credit losses	(111)	(24)	129	(186)
Ending Balance	1,923	1,916	1,923	1,916
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,000	1,000	1,000	1,065
Charge-offs	0	(25)	0	(73)
Recoveries	0	69	196	69
Provision for credit losses	0	(44)	(196)	(61)
Ending Balance	1,000	1,000	1,000	1,000
Commercial Real Estate Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,038	1,885	2,112	1,208
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for credit losses	192	204	118	881
Ending Balance	2,230	2,089	2,230	2,089
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	162	271	191	237
Charge-offs	(3)	(12)	(38)	(37)
Recoveries	4	8	17	29
Provision for credit losses	(1)	(8)	(8)	30
Ending Balance	$ 162	$ 259	$ 162	$ 259

Loans Receivable And Allowanc42

Loans Receivable And Allowance For Credit Losses (Summary Of Loan Portfolio Segment Disaggregated By The Company's Impairment Method) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	$ 7,217,564	$ 7,161,240
Recorded investment in loans individually evaluated for impairment	30,164	42,229
Financing receivable, total recorded investment	7,247,728	7,203,469
ACL for loans collectively evaluated for impairment	8,344	8,398
One- to Four-Family Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	6,776,804	6,767,161
Recorded investment in loans individually evaluated for impairment	29,629	41,455
Financing receivable, total recorded investment	6,806,433	6,808,616
ACL for loans collectively evaluated for impairment	5,952	6,095
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	3,924,124	3,945,063
Recorded investment in loans individually evaluated for impairment	20,662	30,251
Financing receivable, total recorded investment	3,944,786	3,975,314
ACL for loans collectively evaluated for impairment	3,029	3,173
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	2,547,444	2,476,063
Recorded investment in loans individually evaluated for impairment	2,926	3,800
Financing receivable, total recorded investment	2,550,370	2,479,863
ACL for loans collectively evaluated for impairment	1,923	1,922
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	305,236	346,035
Recorded investment in loans individually evaluated for impairment	6,041	7,404
Financing receivable, total recorded investment	311,277	353,439
ACL for loans collectively evaluated for impairment	1,000	1,000
Commercial Real Estate Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	317,763	268,979
Recorded investment in loans individually evaluated for impairment	0	0
Financing receivable, total recorded investment	317,763	268,979
ACL for loans collectively evaluated for impairment	2,230	2,112
Consumer Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	122,997	125,100
Recorded investment in loans individually evaluated for impairment	535	774
Financing receivable, total recorded investment	123,532	125,874
ACL for loans collectively evaluated for impairment	$ 162	$ 191

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Line Items]
Federal corporate income tax rate	35.00%
Revaluation of net deferred tax liability	$ (7,500)
Effective income tax rate				34.20%
Impairment of low income housing partnership investments	$ 0
Scenario, Forecast [Member]
Income Tax Disclosure [Line Items]
Federal corporate income tax rate		21.00%	24.50%
Minimum [Member] | Scenario, Forecast [Member]
Income Tax Disclosure [Line Items]
Effective income tax rate			20.00%
Maximum [Member] | Scenario, Forecast [Member]
Income Tax Disclosure [Line Items]
Effective income tax rate			21.00%

Repurchase Agreements (Narrativ

Repurchase Agreements (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Sep. 30, 2017
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase Agreements, Description of Potential Risks	Securities are delivered to the party with whom each transaction is executed and the party agrees to resell the same securities to the Bank at the maturity of the agreement. The Bank retains the right to substitute similar securities throughout the terms of the agreements. The repurchase agreements and collateral are subject to valuation at current market levels and the Bank may ask for the return of excess collateral or be required to post additional collateral due to changes in the market values of these items. The Bank may also be required to post additional collateral as a result of principal payments received on the securities pledged.
Repurchase agreements	$ 100,000	$ 200,000
Weighted average rate of repurchase agreements	2.53%	2.94%
Maturity Year Two [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 100,000

Fair Value Of Financial Instr45

Fair Value Of Financial Instruments (Narrative) (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Sep. 30, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from principal repayments		$ 164,446	$ 108,170
ACL maintained for loans individually evaluated for impairment	$ 0	0	0	$ 0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of deposits		2,480,000		2,400,000
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of deposits		2,810,000		$ 2,920,000
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds received from sale of AFS securities		2,100
Proceeds from principal repayments	13		75
(Decreases) increases in net unrealized losses included in OCI	4		(121)
Loans individually evaluated for impairment	22,400	5,800	22,400
OREO	1,900	897	1,900
Significant Unobservable Inputs (Level 3) [Member] | Other Income [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on sale of AFS securities		$ 9
Significant Unobservable Inputs (Level 3) [Member] | Estimated Selling Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input		0.10
OREO, measurement input		0.10
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans individually evaluated for impairment	22,400	$ 5,800	22,400
OREO	$ 1,900	$ 897	$ 1,900

Fair Value Of Financial Instr46

Fair Value Of Financial Instruments (Schedule Of Fair Value Assets Measured On A Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	$ 555,361	$ 415,831
GSE Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	237,866	270,729
MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	315,988	141,516
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	1,507	1,535
Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities		2,051
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	555,361	415,831
Interest Rate Swaps	5,868
Assets	561,229
Interest Rate Swaps		598
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	0	0
Interest Rate Swaps	0
Assets	0
Interest Rate Swaps		0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	555,361	413,780
Interest Rate Swaps	5,868
Assets	561,229
Interest Rate Swaps		598
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	0	2,051
Interest Rate Swaps	0
Assets	0
Interest Rate Swaps		0
Fair Value, Measurements, Recurring [Member] | GSE Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	237,866	270,729
Fair Value, Measurements, Recurring [Member] | GSE Debentures [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	0	0
Fair Value, Measurements, Recurring [Member] | GSE Debentures [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	237,866	270,729
Fair Value, Measurements, Recurring [Member] | GSE Debentures [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	0	0
Fair Value, Measurements, Recurring [Member] | MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	315,988	141,516
Fair Value, Measurements, Recurring [Member] | MBS [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	0	0
Fair Value, Measurements, Recurring [Member] | MBS [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	315,988	141,516
Fair Value, Measurements, Recurring [Member] | MBS [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	0	0
Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	1,507	1,535
Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	0	0
Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	1,507	1,535
Fair Value, Measurements, Recurring [Member] | Municipal Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	$ 0	0
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities		2,051
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities		0
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities		0
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities		$ 2,051

Fair Value Of Financial Instr47

Fair Value Of Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Assets:
AFS securities	$ 555,361	$ 415,831
HTM securities	654,965	833,009
Carrying Amount [Member]
Assets:
Cash and cash equivalents	182,078	351,659
AFS securities	555,361	415,831
HTM securities	664,522	827,738
Loans receivable	7,239,384	7,195,071
FHLB stock	100,694	100,954
Interest rate swaps	5,868	0
Liabilities:
Deposits	5,323,083	5,309,868
FHLB borrowings	2,174,816	2,173,808
Repurchase agreements	100,000	200,000
Interest rate swaps	0	598
Estimated Fair Value [Member]
Assets:
Cash and cash equivalents	182,078	351,659
AFS securities	555,361	415,831
HTM securities	654,965	833,009
Loans receivable	7,169,554	7,354,100
FHLB stock	100,694	100,954
Interest rate swaps	5,868	0
Liabilities:
Deposits	5,293,281	5,318,249
FHLB borrowings	2,148,525	2,182,841
Repurchase agreements	99,244	202,004
Interest rate swaps	$ 0	$ 598

Other Comprehensive Income (Det

Other Comprehensive Income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 2,918,000
Other comprehensive income (loss)			178,000	$ (2,260,000)
Reclassification of certain income tax effects related to adoption of ASU 2018-02			0
Ending balance	$ 3,763,000		3,763,000
Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	687,000		3,290,000
Other comprehensive income (loss), before reclassifications	(1,366,000)		(4,430,000)
Amount reclassified from AOCI	0		0
Other comprehensive income (loss)	(1,366,000)		(4,430,000)
Reclassification of certain income tax effects related to adoption of ASU 2018-02			461,000
Ending balance	(679,000)		(679,000)
Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	4,472,000		(372,000)
Other comprehensive income (loss), before reclassifications	(1,000)		5,051,000
Amount reclassified from AOCI	(29,000)		(443,000)
Other comprehensive income (loss)	(30,000)		4,608,000
Reclassification of certain income tax effects related to adoption of ASU 2018-02			206,000
Ending balance	4,442,000		4,442,000
AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	5,159,000		2,918,000
Other comprehensive income (loss), before reclassifications	(1,367,000)		621,000
Amount reclassified from AOCI	(29,000)	$ 0	(443,000)	0
Other comprehensive income (loss)	(1,396,000)		178,000	$ (2,260,000)
Reclassification of certain income tax effects related to adoption of ASU 2018-02			667,000
Ending balance	$ 3,763,000		$ 3,763,000