Capitol Federal Financial (CFFN) 10-Q 10 May 19 2019 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Mar. 31, 2019	May 03, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	Capitol Federal Financial, Inc.
Trading Symbol	CFFN
Entity Central Index Key	0001490906
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		141,371,539

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
ASSETS:
Cash and cash equivalents (includes interest-earning deposits of $199,476 and $122,733)	$ 218,051	$ 139,055
Securities:
Available-for-sale (AFS), at estimated fair value (amortized cost of $741,975 and $718,564)	746,728	714,614
Held-to-maturity (HTM), at amortized cost (estimated fair value of $526,099 and $601,071)	527,460	612,318
Loans receivable, net (allowance for credit losses (ACL) of $8,619 and $8,463)	7,570,806	7,514,485
Federal Home Loan Bank Topeka (FHLB) stock, at cost	102,631	99,726
Premises and equipment, net	96,492	96,005
Income taxes receivable, net	0	2,177
Other assets	272,383	271,167
TOTAL ASSETS	9,534,551	9,449,547
LIABILITIES:
Deposits	5,701,111	5,603,354
FHLB borrowings	2,239,985	2,174,981
Other borrowings	100,000	110,052
Advance payments by borrowers for taxes and insurance	48,301	65,264
Income taxes payable, net	115	0
Deferred income tax liabilities, net	17,375	21,253
Accounts payable and accrued expenses	71,681	83,021
Total liabilities	8,178,568	8,057,925
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, 141,279,239 and 141,225,516 shares issued and outstanding as of March 31, 2019 and September 30, 2018, respectively	1,413	1,412
Additional paid-in capital	1,208,665	1,207,644
Unearned compensation, Employee Stock Ownership Plan (ESOP)	(35,517)	(36,343)
Retained earnings	186,838	214,569
Accumulated other comprehensive (loss) income (AOCI), net of tax	(5,416)	4,340
Total stockholders' equity	1,355,983	1,391,622
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 9,534,551	$ 9,449,547

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Statement of Financial Position [Abstract]
Interest-earning deposits	$ 199,476	$ 122,733
Available-for-sale securities, amortized cost	741,975	718,564
Held-to-maturity securities, estimated fair value	526,099	601,071
Loans receivable, allowance for credit losses	$ 8,619	$ 8,463
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	141,279,239	141,225,516
Common stock, shares outstanding	141,279,239	141,225,516

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
INTEREST AND DIVIDEND INCOME:
Loans receivable	$ 71,657	$ 64,194	$ 142,429	$ 128,383
Mortgage-backed securities (MBS)	6,301	5,390	12,824	10,642
FHLB stock	1,831	3,201	3,802	6,296
Investment securities	1,505	1,094	2,946	2,088
Cash and cash equivalents	743	7,895	2,457	15,009
Total interest and dividend income	82,037	81,774	164,458	162,418
INTEREST EXPENSE:
Deposits	16,096	12,480	31,821	24,441
FHLB borrowings	12,525	18,772	26,055	36,689
Other borrowings	819	633	1,684	2,025
Total interest expense	29,440	31,885	59,560	63,155
NET INTEREST INCOME	52,597	49,889	104,898	99,263
PROVISION FOR CREDIT LOSSES	0	0	0	0
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	52,597	49,889	104,898	99,263
NON-INTEREST INCOME:
Deposit service fees			8,100
Income from bank-owned life insurance (BOLI)	587	276	1,222	810
Other non-interest income	1,323	1,487	2,760	2,346
Total non-interest income	5,001	5,433	10,425	10,791
NON-INTEREST EXPENSE:
Salaries and employee benefits	12,789	11,167	25,751	21,695
Information technology and related expense	4,284	3,622	8,883	6,953
Occupancy, net	3,292	2,839	6,544	5,604
Regulatory and outside services	1,056	1,151	2,822	2,291
Advertising and promotional	1,390	1,337	2,150	2,022
Deposit and loan transaction costs	465	1,313	1,201	2,720
Office supplies and related expense	736	442	1,195	884
Federal insurance premium	659	847	1,187	1,699
Other non-interest expense	1,470	880	3,190	1,766
Total non-interest expense	26,141	23,598	52,923	45,634
INCOME BEFORE INCOME TAX EXPENSE	31,457	31,724	62,400	64,420
INCOME TAX EXPENSE	6,903	8,394	13,463	9,254
NET INCOME	$ 24,554	$ 23,330	$ 48,937	$ 55,166
Basic earnings per share (EPS)	$ 0.18	$ 0.17	$ 0.36	$ 0.41
Diluted EPS	$ 0.18	$ 0.17	$ 0.36	$ 0.41
Basic weighted average common shares	137,634,820	134,428,227	137,592,409	134,400,300
Diluted weighted average common shares	137,690,717	134,475,228	137,641,126	134,471,259
Deposit Account [Member]
NON-INTEREST INCOME:
Deposit service fees	$ 3,091	$ 3,670	$ 6,443	$ 7,635

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 24,554	$ 23,330	$ 48,937	$ 55,166
Other comprehensive income (loss), net of tax:
Changes in unrealized gains (losses) on AFS securities, net of taxes of $(982), $610, $(2,115) and $1,319	3,061	(1,898)	6,588	(3,064)
Changes in unrealized gains (losses) on cash flow hedges, net of taxes of $2,118, $(1,063), $5,246 and $(1,867)	(6,600)	3,316	(16,344)	4,638
Comprehensive income	$ 21,015	$ 24,748	$ 39,181	$ 56,740

Consolidated Statements Of Co_2

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Changes in unrealized gains (losses) on AFS securities, deferred income taxes	$ 982	$ (610)	$ 2,115	$ (1,319)
Changes in unrealized gains (losses) on cash flow hedges, deferred income taxes	$ (2,118)	$ 1,063	$ (5,246)	$ 1,867

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, 2017	$ 1,368,313	$ 1,382	$ 1,167,368	$ (37,995)	$ 234,640	$ 2,918
Net income	31,836				31,836
Other comprehensive income (loss), net of tax	156					156
Cumulative effect of adopting Accounting Standards Update	0		19		(19)
ESOP activity	578		165	413
Stock-based compensation	94		94
Stock options exercised	46	0	46
Cash dividends to stockholders	(50,412)				(50,412)
Balance at Dec. 31, 2017	1,350,611	1,382	1,167,692	(37,582)	216,045	3,074
Balance at Sep. 30, 2017	1,368,313	1,382	1,167,368	(37,995)	234,640	2,918
Net income	55,166
Other comprehensive income (loss), net of tax						1,574
Reclassification of certain tax effects related to adopting ASU 2018-02						667
Balance at Mar. 31, 2018	1,364,740	1,382	1,168,087	(37,169)	227,281	5,159
Balance at Dec. 31, 2017	1,350,611	1,382	1,167,692	(37,582)	216,045	3,074
Net income	23,330				23,330
Other comprehensive income (loss), net of tax	1,418					1,418
Reclassification of certain tax effects related to adopting ASU 2018-02	0				(667)	667
ESOP activity	536		123	413
Stock-based compensation	93		93
Stock options exercised	179		179
Cash dividends to stockholders	(11,427)		0		(11,427)
Balance at Mar. 31, 2018	1,364,740	1,382	1,168,087	(37,169)	227,281	5,159
Balance at Sep. 30, 2018	1,391,622	1,412	1,207,644	(36,343)	214,569	4,340
Net income	24,383				24,383
Other comprehensive income (loss), net of tax	(6,217)					(6,217)
Cumulative effect of adopting Accounting Standards Update	394				394
ESOP activity	531		118	413
Stock-based compensation	95		95
Stock options exercised	467	1	466
Cash dividends to stockholders	(65,362)				(65,362)
Balance at Dec. 31, 2018	1,345,913	1,413	1,208,323	(35,930)	173,984	(1,877)
Balance at Sep. 30, 2018	1,391,622	1,412	1,207,644	(36,343)	214,569	4,340
Net income	48,937
Other comprehensive income (loss), net of tax						(9,756)
Cumulative effect of adopting Accounting Standards Update	394
Balance at Mar. 31, 2019	1,355,983	1,413	1,208,665	(35,517)	186,838	(5,416)
Balance at Dec. 31, 2018	1,345,913	1,413	1,208,323	(35,930)	173,984	(1,877)
Net income	24,554				24,554
Other comprehensive income (loss), net of tax	(3,539)					(3,539)
ESOP activity	547		134	413
Stock-based compensation	90		90
Stock options exercised	118	0	118
Cash dividends to stockholders	(11,700)				(11,700)
Balance at Mar. 31, 2019	$ 1,355,983	$ 1,413	$ 1,208,665	$ (35,517)	$ 186,838	$ (5,416)

Consolidated Statements Of St_2

Consolidated Statements Of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends to stockholders	$ 0.085	$ 0.475	$ 0.085	$ 0.375

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 48,937	$ 55,166
Adjustments to reconcile net income to net cash provided by operating activities:
FHLB stock dividends	(3,802)	(6,296)
Originations of loans receivable held-for-sale (LHFS)	0	(390)
Proceeds from sales of LHFS	0	16,035
Amortization and accretion of premiums and discounts on securities	737	1,733
Depreciation and amortization of premises and equipment	4,710	4,180
Amortization of intangible assets	1,189	0
Amortization of deferred amounts related to FHLB advances, net	4	670
Common stock committed to be released for allocation - ESOP	1,078	1,114
Stock-based compensation	185	187
Changes in:
Unrestricted cash collateral (provided to)/received from derivative counterparties, net	(9,970)	6,711
Other assets, net	1,418	2,257
Income taxes payable, net	2,291	138
Deferred income tax liabilities, net	(745)	(6,396)
Accounts payable and accrued expenses	(13,894)	(8,350)
Net cash provided by operating activities	32,138	66,759
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of AFS securities	(172,506)	(223,829)
Proceeds from calls, maturities and principal reductions of AFS securities	149,524	73,993
Proceeds from calls, maturities and principal reductions of HTM securities	83,692	109,702
Proceeds from sale of AFS securities	0	2,078
Proceeds from the redemption of FHLB stock	97,096	3,045
Purchase of FHLB stock	(96,199)	(91,421)
Net increase in loans receivable	(57,073)	(22,437)
Purchase of premises and equipment	(4,583)	(4,214)
Proceeds from sale of other real estate owned (OREO)	1,062	1,587
Net cash provided by (used in) investing activities	1,013	(151,496)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(77,062)	(61,839)
Net change in deposits	97,757	44,325
Proceeds from borrowings	2,680,000	8,500,000
Repayments on borrowings	(2,625,052)	(8,600,000)
Change in advance payments by borrowers for taxes and insurance	(16,963)	(9,053)
Stock options exercised	585	225
Net cash provided by (used in) financing activities	59,265	(126,342)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS	92,416	(211,079)
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS:
Beginning of period	139,055	351,659
End of period	231,471	140,580
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Loans transferred to LHFS	$ 0	$ 15,814

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	6 Months Ended
	Mar. 31, 2019
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 two wholly-owned subsidiaries, Capitol Funds, Inc. and Capital City Investments, Inc. Capitol Funds, Inc. has a wholly-owned subsidiary, Capitol Federal Mortgage Reinsurance Company. Capital City Investments, Inc. is a real estate and investment holding 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, 2018 , filed with the Securities and Exchange Commission ("SEC"). Interim results are not necessarily indicative of results for a full year. Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents - Cash, cash equivalents, restricted cash and restricted cash equivalents reported in the statement of cash flows include cash and cash equivalents of $218.1 million and $139.1 million at March 31, 2019 and September 30, 2018 and restricted cash and cash equivalents of $13.4 million at March 31, 2019 , which was included in other assets on the consolidated balance sheet. There was no restricted cash and cash equivalents at September 30, 2018 . The restricted cash and cash equivalents relate to the collateral postings to/from the Bank's derivative counterparties associated with the Bank's interest rate swaps. See additional discussion regarding the interest rate swaps in Note 5. Borrowed Funds. Net Presentation of Cash Flows Related to Borrowings - At times, the Bank enters 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. 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 included in Accounting Standards Codification ("ASC") Topic 606. 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. The majority of the Company's revenue is composed of interest income from loans and securities which are explicitly excluded from the amended ASU. The Company elected to implement the amended ASU using the modified retrospective application with a cumulative adjustment to opening retained earnings at October 1, 2018. Upon adoption of the amended ASU, the Company recorded a cumulative adjustment, which increased opening retained earnings by $394 thousand related to contracts that were not complete upon adoption. The amount was related to the change in the recognition of revenue related to certain insurance commissions. Additionally, effective October 1, 2018, interchange network charges are reported as a reduction in deposit service fees. Previously, these charges were reported as expense in deposit and loan transaction costs in the consolidated statements of income. The Company concluded the ASU did not significantly change the Company's revenue recognition methods. This ASU did not have a material impact on the Company's consolidated financial condition or results of operations at the time of adoption. The new disclosure requirements of the ASU are included in Note 8. Revenue Recognition. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial 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 notion when determining fair value for financial instruments measured at amortized cost on the balance sheet. The ASU also requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the notes to the financial statements. ASU 2016-01 became effective for the Company on October 1, 2018. The adoption of this ASU did not have a material impact on the Company's consolidated financial condition or results of operations. The new disclosure requirements of the ASU are included in Note 6. Fair Value of Financial Instruments. In February 2016, the FASB issued ASU 2016-02, Leases . The ASU, as amended, revises 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 completed its development of a lease inventory and an internal lease data collection, organization, and computing platform for compliance with this ASU. The Company is continuing to evaluate the impact this ASU may have on the Company's consolidated financial condition and results of operations. 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 the minimum commitments under non-cancellable leases as of the date of adoption. The Company is continuing to evaluate the impact this ASU may have to the Company's disclosures. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments . The ASU, as amended, 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 selected a third-party vendor solution to assist in the application and implementation of the new accounting guidance and will begin loading historical loan and loss data into the third-party software during the third quarter of fiscal year 2019. 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 November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows: Restricted Cash (a consensus of the FASB Emerging Issues Task Force) . The ASU addresses diversity in the classification and presentation of changes in restricted cash and cash equivalents on the statement of cash flows. The ASU requires that amounts described as restricted cash and cash equivalents be included with cash and cash equivalents when reconciling the beginning and ending amounts presented on the statement of cash flows, requires disclosures on the nature of restrictions on cash and cash equivalents, and the amount and financial statement line presentation of restricted cash and cash equivalents. The Company adopted this ASU on October 1, 2018 and it did not have a material impact on the Company's consolidated financial condition or results of operations at the time of adoption. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging: Targeted 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 August 2018, the FASB issued ASU 2018-13, Fair Value Measurement: Disclosure Framework - Changes to the Disclosures Requirements for Fair Value Measurement . This ASU eliminates, modifies and adds certain disclosure requirements for fair value measurements. The ASU adds disclosure requirements for the changes in unrealized gains and losses included in other comprehensive income for recurring Level 3 fair value measurements and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. The effective date of this ASU for the Company is October 1, 2020, with early adoption permitted. Entities are allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. Since this ASU only requires disclosure changes, it will not have a significant impact on the Company's consolidated financial condition and results of operations. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

Earnings Per Share

Earnings Per Share	6 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE Shares acquired by the ESOP are not included in 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 Six Months Ended March 31, March 31, 2019 2018 2019 2018 (Dollars in thousands, except per share amounts) Net income $ 24,554 $ 23,330 $ 48,937 $ 55,166 Income allocated to participating securities (10 ) (10 ) (19 ) (23 ) Net income available to common stockholders $ 24,544 $ 23,320 $ 48,918 $ 55,143 Average common shares outstanding 137,593,062 134,386,469 137,571,533 134,379,424 Average committed ESOP shares outstanding 41,758 41,758 20,876 20,876 Total basic average common shares outstanding 137,634,820 134,428,227 137,592,409 134,400,300 Effect of dilutive stock options 55,897 47,001 48,717 70,959 Total diluted average common shares outstanding 137,690,717 134,475,228 137,641,126 134,471,259 Net EPS: Basic $ 0.18 $ 0.17 $ 0.36 $ 0.41 Diluted $ 0.18 $ 0.17 $ 0.36 $ 0.41 Antidilutive stock options, excluded from the diluted average common shares outstanding calculation 494,395 598,195 529,261 527,642

Securities

Securities	6 Months Ended
	Mar. 31, 2019
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"). March 31, 2019 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 469,455 $ 5,995 $ 606 $ 474,844 GSE debentures 268,375 274 908 267,741 Municipal bonds 4,145 3 5 4,143 $ 741,975 $ 6,272 $ 1,519 $ 746,728 HTM: MBS $ 510,450 $ 5,107 $ 6,461 $ 509,096 Municipal bonds 17,010 19 26 17,003 $ 527,460 $ 5,126 $ 6,487 $ 526,099 September 30, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 445,883 $ 3,270 $ 4,063 $ 445,090 GSE debentures 268,525 30 3,157 265,398 Municipal bonds 4,156 — 30 4,126 $ 718,564 $ 3,300 $ 7,250 $ 714,614 HTM: MBS $ 591,900 $ 4,514 $ 15,589 $ 580,825 Municipal bonds 20,418 — 172 20,246 $ 612,318 $ 4,514 $ 15,761 $ 601,071 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. March 31, 2019 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: MBS $ 11,197 $ 55 $ 67,001 $ 551 GSE debentures 27,776 3 99,077 905 Municipal bonds — — 1,510 5 $ 38,973 $ 58 $ 167,588 $ 1,461 HTM: MBS $ 1,551 $ 2 $ 331,809 $ 6,459 Municipal bonds 330 2 7,977 24 $ 1,881 $ 4 $ 339,786 $ 6,483 September 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: MBS $ 324,563 $ 3,797 $ 8,129 $ 266 GSE debentures 101,735 1,231 148,049 1,926 Municipal bonds 4,126 30 — — $ 430,424 $ 5,058 $ 156,178 $ 2,192 HTM: MBS $ 58,233 $ 904 $ 362,806 $ 14,685 Municipal bonds 18,345 171 685 1 $ 76,578 $ 1,075 $ 363,491 $ 14,686 The unrealized losses at March 31, 2019 and September 30, 2018 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 March 31, 2019 or September 30, 2018 . The amortized cost and estimated fair value of debt securities as of March 31, 2019 , 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 $ 5,400 $ 5,398 $ 3,842 $ 3,837 One year through five years 267,120 266,486 13,168 13,166 272,520 271,884 17,010 17,003 MBS 469,455 474,844 510,450 509,096 $ 741,975 $ 746,728 $ 527,460 $ 526,099 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 Six Months Ended March 31, March 31, 2019 2018 2019 2018 (Dollars in thousands) Taxable $ 1,419 $ 998 $ 2,767 $ 1,878 Non-taxable 86 96 179 210 $ 1,505 $ 1,094 $ 2,946 $ 2,088 The following table summarizes the carrying value of securities pledged as collateral for the obligations indicated below as of the dates presented. March 31, 2019 September 30, 2018 (Dollars in thousands) Public unit deposits $ 467,812 $ 515,553 Repurchase agreements 107,862 108,360 Federal Reserve Bank of Kansas City ("FRB of Kansas City") 7,979 9,529 $ 583,653 $ 633,442

Loans Receivable And Allowance

Loans Receivable And Allowance For Credit Losses	6 Months Ended
	Mar. 31, 2019
Loans and Leases Receivable Disclosure [Abstract]
Loans Receivable And Allowance For Credit Losses	LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSESLoans receivable, net at the dates presented is summarized as follows: March 31, 2019 September 30, 2018 (Dollars in thousands) One- to four-family: Originated $ 3,922,565 $ 3,965,692 Correspondent purchased 2,470,619 2,505,987 Bulk purchased 272,575 293,607 Construction 33,525 33,149 Total 6,699,284 6,798,435 Commercial: Commercial real estate 547,202 426,243 Commercial and industrial 73,852 62,869 Construction 108,649 80,498 Total 729,703 569,610 Consumer: Home equity 125,176 129,588 Other 9,913 10,012 Total 135,089 139,600 Total loans receivable 7,564,076 7,507,645 Less: ACL 8,619 8,463 Discounts/unearned loan fees 32,582 33,933 Premiums/deferred costs (47,931 ) (49,236 ) $ 7,570,806 $ 7,514,485 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 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 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 and owner-occupied construction-to-permanent loans secured by one- to four-family residential real estate. 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 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 1.20 . Appraisals on properties securing these loans are performed by independent state certified fee appraisers. The Bank's commercial and industrial loans are generally made in the Bank's market areas and are underwritten on the basis of the borrower's ability to service the debt from income. Working capital loans are primarily collateralized by short-term assets whereas term loans are primarily collateralized by long-term assets. In general, commercial and industrial loans involve more credit risk than commercial real estate loans due to the type of collateral securing these loans, as well as the expectation that commercial and industrial loans generally will be serviced principally from the operations of the business, and those operations may not be successful. As a result of these additional complexities, variables and risks, these loans require more thorough underwriting and servicing than other types of loans. Consumer loans - The Bank offers a variety of secured consumer loans, including home equity loans and lines of credit, home improvement loans, vehicle loans, and loans secured by deposits. The Bank also originates a very limited amount of unsecured loans. 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. These segments are further divided 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, consumer - other, commercial - commercial real estate, and commercial - commercial and industrial. 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 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 March 31, 2019 and September 30, 2018 , all loans 90 or more days delinquent were on nonaccrual status. March 31, 2019 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 $ 8,665 $ 5,158 $ 13,823 $ 3,927,534 $ 3,941,357 Correspondent purchased 4,186 932 5,118 2,499,826 2,504,944 Bulk purchased 2,764 2,799 5,563 268,267 273,830 Commercial: Commercial real estate 64 — 64 651,373 651,437 Commercial and industrial 1,303 — 1,303 71,741 73,044 Consumer: Home equity 430 514 944 123,999 124,943 Other 51 14 65 9,805 9,870 $ 17,463 $ 9,417 $ 26,880 $ 7,552,545 $ 7,579,425 September 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 $ 10,613 $ 5,025 $ 15,638 $ 3,968,362 $ 3,984,000 Correspondent purchased 3,846 458 4,304 2,536,913 2,541,217 Bulk purchased 3,521 3,063 6,584 288,386 294,970 Commercial: Commercial real estate 76 — 76 501,932 502,008 Commercial and industrial 250 — 250 61,255 61,505 Consumer: Home equity 472 521 993 128,351 129,344 Other 61 10 71 9,833 9,904 $ 18,839 $ 9,077 $ 27,916 $ 7,495,032 $ 7,522,948 The recorded investment in mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process as of March 31, 2019 and September 30, 2018 was $3.1 million and $2.9 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 $871 thousand at March 31, 2019 and $1.3 million at September 30, 2018 . The following table presents the recorded investment, by class, in loans classified as nonaccrual at the dates presented. March 31, 2019 September 30, 2018 (Dollars in thousands) One- to four-family: Originated $ 6,872 $ 6,503 Correspondent purchased 932 863 Bulk purchased 2,799 3,063 Commercial: Commercial real estate 1,288 — Commercial and industrial — — Consumer: Home equity 517 530 Other 20 10 $ 12,428 $ 10,969 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. March 31, 2019 September 30, 2018 Special Mention Substandard Special Mention Substandard (Dollars in thousands) One- to four-family: Originated $ 9,522 $ 19,247 $ 8,660 $ 22,409 Correspondent purchased 2,312 3,101 997 3,126 Bulk purchased 69 6,208 — 7,195 Commercial: Commercial real estate 3,675 1,288 1,251 1,368 Commercial and industrial 1,641 — 1,126 — Consumer: Home equity 110 834 298 894 Other 15 3 — 10 $ 17,344 $ 30,681 $ 12,332 $ 35,002 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 2019, 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. March 31, 2019 September 30, 2018 Credit Score LTV Credit Score LTV One- to four-family - originated 768 62 % 767 63 % One- to four-family - correspondent 764 66 764 67 One- to four-family - bulk purchased 761 61 758 62 Consumer - home equity 754 21 750 22 766 63 765 63 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. For the Three Months Ended For the Six Months Ended March 31, 2019 March 31, 2019 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 $ 117 $ 117 Correspondent purchased — — — — — — Bulk purchased 1 308 308 1 308 308 Commercial: Commercial real estate — — — — — — Commercial and industrial — — — — — — Consumer: Home equity — — — — — — Other — — — — — — 1 $ 308 $ 308 2 $ 425 $ 425 For the Three Months Ended For the Six Months Ended March 31, 2018 March 31, 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 2 $ 93 $ 94 3 $ 167 $ 176 Correspondent purchased — — — — — — Bulk purchased — — — — — — Commercial: Commercial real estate — — — — — — Commercial and industrial — — — — — — Consumer: Home equity — — — — — — Other — — — — — — 2 $ 93 $ 94 3 $ 167 $ 176 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 Six Months Ended March 31, 2019 March 31, 2018 March 31, 2019 March 31, 2018 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 $ 45 7 $ 434 1 $ 45 19 $ 1,254 Correspondent purchased — — 1 124 — — 1 124 Bulk purchased — — — — — — 3 1,040 Commercial: Commercial real estate — — — — — — — — Commercial and industrial — — — — — — — — Consumer: Home equity — — — — — — 4 133 Other — — — — — — — — 1 $ 45 8 $ 558 1 $ 45 27 $ 2,551 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. March 31, 2019 September 30, 2018 Unpaid Unpaid Recorded Principal Recorded Principal Investment Balance Investment Balance (Dollars in thousands) One- to four-family: Originated $ 15,299 $ 15,826 $ 18,857 $ 19,388 Correspondent purchased 2,170 2,274 2,668 2,768 Bulk purchased 5,131 5,849 6,011 6,976 Commercial: Commercial real estate — — — — Commercial and industrial — — — — Consumer: Home equity 398 548 504 720 Other — 30 — 25 $ 22,998 $ 24,527 $ 28,040 $ 29,877 The following information pertains to impaired loans, by class, for the periods presented. For the Three Months Ended For the Six Months Ended March 31, 2019 March 31, 2018 March 31, 2019 March 31, 2018 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) One- to four-family: Originated $ 15,928 $ 167 $ 25,398 $ 251 16,980 352 26,896 548 Correspondent purchased 2,177 23 3,362 31 2,251 45 3,530 64 Bulk purchased 5,230 43 6,319 42 5,453 86 6,761 95 Commercial: Commercial real estate — — — — — — — — Commercial and industrial — — — — — — — — Consumer: Home equity 436 7 606 9 461 16 637 19 Other — — — — — — — — $ 23,771 $ 240 $ 35,685 $ 333 $ 25,145 $ 499 $ 37,824 $ 726 - 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 March 31, 2019 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 2,761 $ 1,748 $ 836 $ 5,345 $ 3,034 $ 179 $ 8,558 Charge-offs (10 ) — — (10 ) — (2 ) (12 ) Recoveries 2 — 17 19 25 29 73 Provision for credit losses (580 ) (356 ) (51 ) (987 ) 1,029 (42 ) — Ending balance $ 2,173 $ 1,392 $ 802 $ 4,367 $ 4,088 $ 164 $ 8,619 For the Six Months Ended March 31, 2019 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 2,953 $ 1,861 $ 925 $ 5,739 $ 2,556 $ 168 $ 8,463 Charge-offs (30 ) — (26 ) (56 ) — (12 ) (68 ) Recoveries 5 — 106 111 27 86 224 Provision for credit losses (755 ) (469 ) (203 ) (1,427 ) 1,505 (78 ) — Ending balance $ 2,173 $ 1,392 $ 802 $ 4,367 $ 4,088 $ 164 $ 8,619 For the Three Months Ended March 31, 2018 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 3,115 $ 1,902 $ 1,000 $ 6,017 $ 2,157 $ 196 $ 8,370 Charge-offs (68 ) (128 ) — (196 ) — (4 ) (200 ) Recoveries 17 — 196 213 — 7 220 Provision for credit losses 92 260 (196 ) 156 (119 ) (37 ) — Ending balance $ 3,156 $ 2,034 $ 1,000 $ 6,190 $ 2,038 $ 162 $ 8,390 For the Six Months Ended March 31, 2018 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 3,173 $ 1,922 $ 1,000 $ 6,095 $ 2,112 $ 191 $ 8,398 Charge-offs (71 ) (128 ) — (199 ) — (35 ) (234 ) Recoveries 17 — 196 213 — 13 226 Provision for credit losses 37 240 (196 ) 81 (74 ) (7 ) — Ending balance $ 3,156 $ 2,034 $ 1,000 $ 6,190 $ 2,038 $ 162 $ 8,390 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. March 31, 2019 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,926,057 $ 2,502,775 $ 268,699 $ 6,697,531 $ 724,481 $ 134,415 $ 7,556,427 Recorded investment in loans individually evaluated for impairment 15,300 2,169 5,131 22,600 — 398 22,998 $ 3,941,357 $ 2,504,944 $ 273,830 $ 6,720,131 $ 724,481 $ 134,813 $ 7,579,425 ACL for loans collectively evaluated for impairment $ 2,173 $ 1,392 $ 802 $ 4,367 $ 4,088 $ 164 $ 8,619 September 30, 2018 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,965,143 $ 2,538,549 $ 288,959 $ 6,792,651 $ 563,513 $ 138,744 $ 7,494,908 Recorded investment in loans individually evaluated for impairment 18,857 2,668 6,011 27,536 — 504 28,040 $ 3,984,000 $ 2,541,217 $ 294,970 $ 6,820,187 $ 563,513 $ 139,248 $ 7,522,948 ACL for loans collectively evaluated for impairment $ 2,953 $ 1,861 $ 925 $ 5,739 $ 2,556 $ 168 $ 8,463

Borrowed Funds

Borrowed Funds	6 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Borrowed Funds	BORROWED FUNDS FHLB Borrowings and Interest Rate Swaps - At March 31, 2019 and September 30, 2018 , the Bank had interest rate swap agreements with a total notional amount of $640.0 million and $475.0 million , respectively, in order to hedge the variable cash flows associated with $640.0 million and $475.0 million , respectively, of adjustable-rate FHLB advances. At March 31, 2019 and September 30, 2018 , the interest rate swap agreements had an average remaining term to maturity of 4.9 years and 5.8 years , respectively. The interest rate swaps were designated as cash flow hedges and involve the receipt of variable amounts from a counterparty in exchange for the Bank making fixed-rate payments over the life of the interest rate swap agreements. At March 31, 2019 , the interest rate swaps were in a loss position with a total fair value of $11.9 million , which was reported in accounts payable and accrued expenses on the consolidated balance sheet. At September 30, 2018 , the interest rate swaps were in a gain position with a total fair value of $9.7 million , which was reported in other assets on the consolidated balance sheet. During the three months ended March 31, 2019 , $100 thousand was reclassified from AOCI as a decrease to interest expense. During the six months ended March 31, 2019 , $51 thousand was reclassified from AOCI as an increase to interest expense. During the three and six months ended March 31, 2018 , $140 thousand and $414 thousand , respectively, were reclassified from AOCI as a decrease to interest expense. There was no hedge ineffectiveness recognized in the consolidated statements of income during either period. At March 31, 2019 , the Company estimates that $888 thousand will be reclassified as an increase to interest expense during the next 12 months. The Bank has minimum collateral posting thresholds with its derivative counterparties and posts collateral on a daily basis. The Bank posted cash collateral of $13.4 million at March 31, 2019 and held cash collateral of $10.0 million at September 30, 2018 . Junior Subordinated Debentures and Trust Preferred Securities - In conjunction with the Capital City Bancshares, Inc. ("CCB") acquisition, the Company assumed $10.1 million of junior subordinated debentures relating to mandatorily redeemable capital trust preferred securities that were previously issued by CCB-sponsored trusts to third party investors. The proceeds from the trust preferred securities were invested in the related junior subordinated debentures issued by CCB. The junior subordinated debentures were redeemed during the six months ended March 31, 2019

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	6 Months Ended
	Mar. 31, 2019
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 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. 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 six months ended March 31, 2019 or during fiscal year 2018. 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) 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. See "Note 5. Borrowed Funds" for additional information. 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 with independent observable market-based inputs from a third party. The Company did not make any adjustments to the estimated fair value during the six months ended March 31, 2019 or during fiscal year 2018. (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. The Company did not have any Level 3 financial instruments measured at fair value on a recurring basis at March 31, 2019 or September 30, 2018 . The Company did not have any liabilities measured at fair value at September 30, 2018. March 31, 2019 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: MBS $ 474,844 $ — $ 474,844 $ — GSE debentures 267,741 — 267,741 — Municipal bonds 4,143 — 4,143 — 746,728 — 746,728 — Interest rate swaps — — — — $ 746,728 $ — $ 746,728 $ — Liabilities: Interest rate swaps $ 11,907 $ — $ 11,907 $ — September 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: MBS $ 445,090 $ — $ 445,090 $ — GSE debentures 265,398 — 265,398 — Municipal bonds 4,126 — 4,126 — 714,614 — 714,614 — Interest rate swaps 9,685 — 9,685 — $ 724,299 $ — $ 724,299 $ — 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 six months ended March 31, 2019 and 2018 that were still held in the portfolio as of March 31, 2019 and 2018 was $2.8 million and $4.6 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 March 31, 2019 and 2018 ; 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. The fair value for OREO 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 six months ended March 31, 2019 and 2018 that was still held in the portfolio as of March 31, 2019 and 2018 was $582 thousand and $686 thousand , respectively. The carrying value of the properties equaled the fair value of the properties at March 31, 2019 and 2018 . 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 by fair value hierarchy, at the dates presented, were as follows: March 31, 2019 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Cash and cash equivalents $ 218,051 $ 218,051 $ 218,051 $ — $ — AFS securities 746,728 746,728 — 746,728 — HTM securities 527,460 526,099 — 526,099 — Loans receivable 7,570,806 7,646,753 — — 7,646,753 FHLB stock 102,631 102,631 102,631 — — Liabilities: Deposits 5,701,111 5,696,333 2,778,862 2,917,471 — FHLB borrowings 2,239,985 2,214,700 100,001 2,114,699 — Other borrowings 100,000 98,843 — 98,843 — Interest rate swaps 11,907 11,907 — 11,907 — September 30, 2018 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Cash and cash equivalents $ 139,055 $ 139,055 $ 139,055 $ — $ — AFS securities 714,614 714,614 — 714,614 — HTM securities 612,318 601,071 — 601,071 — Loans receivable 7,514,485 7,418,026 — — 7,418,026 FHLB stock 99,726 99,726 99,726 — — Interest rate swaps 9,685 9,685 — 9,685 — Liabilities: Deposits 5,603,354 5,569,591 2,666,297 2,903,294 — FHLB borrowings 2,174,981 2,145,477 100,000 2,045,477 — Other borrowings 110,052 109,465 10,503 98,962 —

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income	ACCUMULATED OTHER COMPREHENSIVE INCOME The following is a summary of changes in the components of AOCI, net of tax, for the periods presented. For the Three Months Ended March 31, 2019 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (Dollars in thousands) Beginning balance $ 537 $ (2,414 ) $ (1,877 ) Other comprehensive income (loss), before reclassifications 3,061 (6,500 ) (3,439 ) Amount reclassified from AOCI — (100 ) (100 ) Other comprehensive income (loss) 3,061 (6,600 ) (3,539 ) Ending balance $ 3,598 $ (9,014 ) $ (5,416 ) For the Six Months Ended March 31, 2019 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (Dollars in thousands) Beginning balance $ (2,990 ) $ 7,330 $ 4,340 Other comprehensive income (loss), before reclassifications 6,588 (16,395 ) (9,807 ) Amount reclassified from AOCI — 51 51 Other comprehensive income (loss) 6,588 (16,344 ) (9,756 ) Ending balance $ 3,598 $ (9,014 ) $ (5,416 ) For the Three Months Ended March 31, 2018 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (Dollars in thousands) Beginning balance $ 2,124 $ 950 $ 3,074 Other comprehensive income (loss), before reclassifications (1,898 ) 3,456 1,558 Amount reclassified from AOCI — (140 ) (140 ) Other comprehensive income (loss) (1,898 ) 3,316 1,418 Reclassification of certain income tax effects related to adoption of ASU 2018-02 461 206 667 Ending balance $ 687 $ 4,472 $ 5,159 For the Six Months Ended March 31, 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 (3,064 ) 5,052 1,988 Amount reclassified from AOCI — (414 ) (414 ) Other comprehensive income (loss) (3,064 ) 4,638 1,574 Reclassification of certain income tax effects related to adoption of ASU 2018-02 461 206 667 Ending balance $ 687 $ 4,472 $ 5,159

Revenue Recognition

Revenue Recognition	6 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	REVENUE RECOGNITION On October 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers , and all subsequent ASUs that modified the principles for recognizing revenue. The Company's primary sources of revenue consist of net interest income on financial assets and liabilities, which are not within the scope of the amended ASU. In addition, certain non-interest income revenue streams, such as loan servicing fees, derivatives, and BOLI, are not in-scope of the amended ASU. Based on an assessment of non-interest income revenue streams and a review of the related contracts with customers, the Company concluded the amended ASU did not significantly change the Company's revenue recognition methods. The Company elected to implement the amended ASU using the modified retrospective application with a cumulative adjustment, which increased opening retained earnings at October 1, 2018 by $394 thousand related to contracts that were not complete upon adoption. The amount was related to the change in the recognition of revenue related to certain insurance commissions. Details of the Company's primary types of non-interest income revenue streams by financial statement line reported in the consolidated statements of income that are within the scope of the amended ASU and ASC Topic 606 are below. During the current year six month period , revenue from contracts with customers totaled $8.1 million . Deposit Service Fees Interchange Transaction Fees - Interchange transaction fee income primarily consists of interchange fees earned on a transactional basis through card payment networks. The performance obligation for these types of transactions is satisfied as services are rendered for each transaction and revenue is recognized daily concurrently with the transaction processing services provided to the cardholder. In order to participate in the card payment networks, the Company must pay various transaction related costs established by the networks ("interchange network charges"), including membership fees and a per unit charge for each transaction. The Company determined it is acting as an agent for its debit card customers when they are utilizing the card payment networks; therefore, upon adoption of the amended ASU, interchange transaction fee income is reported net of interchange network charges. Previously, interchange network charges were reported in deposit and loan expense. Interchange network charges totaled $1.7 million and $1.5 million for the six months ended March 31, 2019 and 2018 , respectively. Service Charges on Deposit Accounts - Service charges on deposit accounts consist of account maintenance and transaction-based fees such as overdrafts, insufficient funds, wire transfers and the use of out-of-network ATMs. The Company's performance obligation is satisfied over a period of time, generally a month, for account maintenance and at the time of service for transaction-based fees. Revenue is recognized after the performance obligation is satisfied. Payments are typically collected from the customer's deposit account at the time the transaction is processed and/or at the end of the customer's statement cycle (typically monthly). Other Non-Interest Income Trust Asset Management Income - The Company provides trust asset management services to customers. The Company primarily earns fees for these services over time as the monthly services are provided and the Company assesses revenue at each month end. Fees are charged based on a tiered scale of the market value of the individual trust asset accounts at the end of the month. Insurance Commissions -

Summary Of Significant Accoun_2

Summary Of Significant Accounting Policies (Policies)	6 Months Ended
	Mar. 31, 2019
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 two wholly-owned subsidiaries, Capitol Funds, Inc. and Capital City Investments, Inc. Capitol Funds, Inc. has a wholly-owned subsidiary, Capitol Federal Mortgage Reinsurance Company. Capital City Investments, Inc. is a real estate and investment holding 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, 2018
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	Cash, cash equivalents, restricted cash and restricted cash equivalents reported in the statement of cash flows include cash and cash equivalents of $218.1 million and $139.1 million at March 31, 2019 and September 30, 2018 and restricted cash and cash equivalents of $13.4 million at March 31, 2019 , which was included in other assets on the consolidated balance sheet. There was no restricted cash and cash equivalents at September 30, 2018
Net Presentation of Cash Flows Related to Borrowings	At times, the Bank enters 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.
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 included in Accounting Standards Codification ("ASC") Topic 606. 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. The majority of the Company's revenue is composed of interest income from loans and securities which are explicitly excluded from the amended ASU. The Company elected to implement the amended ASU using the modified retrospective application with a cumulative adjustment to opening retained earnings at October 1, 2018. Upon adoption of the amended ASU, the Company recorded a cumulative adjustment, which increased opening retained earnings by $394 thousand related to contracts that were not complete upon adoption. The amount was related to the change in the recognition of revenue related to certain insurance commissions. Additionally, effective October 1, 2018, interchange network charges are reported as a reduction in deposit service fees. Previously, these charges were reported as expense in deposit and loan transaction costs in the consolidated statements of income. The Company concluded the ASU did not significantly change the Company's revenue recognition methods. This ASU did not have a material impact on the Company's consolidated financial condition or results of operations at the time of adoption. The new disclosure requirements of the ASU are included in Note 8. Revenue Recognition. In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial 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 notion when determining fair value for financial instruments measured at amortized cost on the balance sheet. The ASU also requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or in the notes to the financial statements. ASU 2016-01 became effective for the Company on October 1, 2018. The adoption of this ASU did not have a material impact on the Company's consolidated financial condition or results of operations. The new disclosure requirements of the ASU are included in Note 6. Fair Value of Financial Instruments. In February 2016, the FASB issued ASU 2016-02, Leases . The ASU, as amended, revises 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 completed its development of a lease inventory and an internal lease data collection, organization, and computing platform for compliance with this ASU. The Company is continuing to evaluate the impact this ASU may have on the Company's consolidated financial condition and results of operations. 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 the minimum commitments under non-cancellable leases as of the date of adoption. The Company is continuing to evaluate the impact this ASU may have to the Company's disclosures. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments . The ASU, as amended, 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 selected a third-party vendor solution to assist in the application and implementation of the new accounting guidance and will begin loading historical loan and loss data into the third-party software during the third quarter of fiscal year 2019. 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 November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows: Restricted Cash (a consensus of the FASB Emerging Issues Task Force) . The ASU addresses diversity in the classification and presentation of changes in restricted cash and cash equivalents on the statement of cash flows. The ASU requires that amounts described as restricted cash and cash equivalents be included with cash and cash equivalents when reconciling the beginning and ending amounts presented on the statement of cash flows, requires disclosures on the nature of restrictions on cash and cash equivalents, and the amount and financial statement line presentation of restricted cash and cash equivalents. The Company adopted this ASU on October 1, 2018 and it did not have a material impact on the Company's consolidated financial condition or results of operations at the time of adoption. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging: Targeted 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 August 2018, the FASB issued ASU 2018-13, Fair Value Measurement: Disclosure Framework - Changes to the Disclosures Requirements for Fair Value Measurement . This ASU eliminates, modifies and adds certain disclosure requirements for fair value measurements. The ASU adds disclosure requirements for the changes in unrealized gains and losses included in other comprehensive income for recurring Level 3 fair value measurements and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. The effective date of this ASU for the Company is October 1, 2020, with early adoption permitted. Entities are allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. Since this ASU only requires disclosure changes, it will not have a significant impact on the Company's consolidated financial condition and results of operations. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Mar. 31, 2019
Earnings Per Share [Abstract]
Schedule Of Earnings Per Share, Basic And Diluted	Shares acquired by the ESOP are not included in 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 Six Months Ended March 31, March 31, 2019 2018 2019 2018 (Dollars in thousands, except per share amounts) Net income $ 24,554 $ 23,330 $ 48,937 $ 55,166 Income allocated to participating securities (10 ) (10 ) (19 ) (23 ) Net income available to common stockholders $ 24,544 $ 23,320 $ 48,918 $ 55,143 Average common shares outstanding 137,593,062 134,386,469 137,571,533 134,379,424 Average committed ESOP shares outstanding 41,758 41,758 20,876 20,876 Total basic average common shares outstanding 137,634,820 134,428,227 137,592,409 134,400,300 Effect of dilutive stock options 55,897 47,001 48,717 70,959 Total diluted average common shares outstanding 137,690,717 134,475,228 137,641,126 134,471,259 Net EPS: Basic $ 0.18 $ 0.17 $ 0.36 $ 0.41 Diluted $ 0.18 $ 0.17 $ 0.36 $ 0.41 Antidilutive stock options, excluded from the diluted average common shares outstanding calculation 494,395 598,195 529,261 527,642

Securities (Tables)

Securities (Tables)	6 Months Ended
	Mar. 31, 2019
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"). March 31, 2019 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 469,455 $ 5,995 $ 606 $ 474,844 GSE debentures 268,375 274 908 267,741 Municipal bonds 4,145 3 5 4,143 $ 741,975 $ 6,272 $ 1,519 $ 746,728 HTM: MBS $ 510,450 $ 5,107 $ 6,461 $ 509,096 Municipal bonds 17,010 19 26 17,003 $ 527,460 $ 5,126 $ 6,487 $ 526,099 September 30, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 445,883 $ 3,270 $ 4,063 $ 445,090 GSE debentures 268,525 30 3,157 265,398 Municipal bonds 4,156 — 30 4,126 $ 718,564 $ 3,300 $ 7,250 $ 714,614 HTM: MBS $ 591,900 $ 4,514 $ 15,589 $ 580,825 Municipal bonds 20,418 — 172 20,246 $ 612,318 $ 4,514 $ 15,761 $ 601,071
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"). March 31, 2019 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 469,455 $ 5,995 $ 606 $ 474,844 GSE debentures 268,375 274 908 267,741 Municipal bonds 4,145 3 5 4,143 $ 741,975 $ 6,272 $ 1,519 $ 746,728 HTM: MBS $ 510,450 $ 5,107 $ 6,461 $ 509,096 Municipal bonds 17,010 19 26 17,003 $ 527,460 $ 5,126 $ 6,487 $ 526,099 September 30, 2018 Gross Gross Estimated Amortized Unrealized Unrealized Fair Cost Gains Losses Value (Dollars in thousands) AFS: MBS $ 445,883 $ 3,270 $ 4,063 $ 445,090 GSE debentures 268,525 30 3,157 265,398 Municipal bonds 4,156 — 30 4,126 $ 718,564 $ 3,300 $ 7,250 $ 714,614 HTM: MBS $ 591,900 $ 4,514 $ 15,589 $ 580,825 Municipal bonds 20,418 — 172 20,246 $ 612,318 $ 4,514 $ 15,761 $ 601,071
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. March 31, 2019 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: MBS $ 11,197 $ 55 $ 67,001 $ 551 GSE debentures 27,776 3 99,077 905 Municipal bonds — — 1,510 5 $ 38,973 $ 58 $ 167,588 $ 1,461 HTM: MBS $ 1,551 $ 2 $ 331,809 $ 6,459 Municipal bonds 330 2 7,977 24 $ 1,881 $ 4 $ 339,786 $ 6,483 September 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: MBS $ 324,563 $ 3,797 $ 8,129 $ 266 GSE debentures 101,735 1,231 148,049 1,926 Municipal bonds 4,126 30 — — $ 430,424 $ 5,058 $ 156,178 $ 2,192 HTM: MBS $ 58,233 $ 904 $ 362,806 $ 14,685 Municipal bonds 18,345 171 685 1 $ 76,578 $ 1,075 $ 363,491 $ 14,686
Schedule Of Contractual Maturities	The amortized cost and estimated fair value of debt securities as of March 31, 2019 , 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 $ 5,400 $ 5,398 $ 3,842 $ 3,837 One year through five years 267,120 266,486 13,168 13,166 272,520 271,884 17,010 17,003 MBS 469,455 474,844 510,450 509,096 $ 741,975 $ 746,728 $ 527,460 $ 526,099
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 Six Months Ended March 31, March 31, 2019 2018 2019 2018 (Dollars in thousands) Taxable $ 1,419 $ 998 $ 2,767 $ 1,878 Non-taxable 86 96 179 210 $ 1,505 $ 1,094 $ 2,946 $ 2,088
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. March 31, 2019 September 30, 2018 (Dollars in thousands) Public unit deposits $ 467,812 $ 515,553 Repurchase agreements 107,862 108,360 Federal Reserve Bank of Kansas City ("FRB of Kansas City") 7,979 9,529 $ 583,653 $ 633,442

Loans Receivable And Allowanc_2

Loans Receivable And Allowance For Credit Losses (Tables)	6 Months Ended
	Mar. 31, 2019
Loans and Leases Receivable Disclosure [Abstract]
Summary of Loans Receivable	Loans receivable, net at the dates presented is summarized as follows: March 31, 2019 September 30, 2018 (Dollars in thousands) One- to four-family: Originated $ 3,922,565 $ 3,965,692 Correspondent purchased 2,470,619 2,505,987 Bulk purchased 272,575 293,607 Construction 33,525 33,149 Total 6,699,284 6,798,435 Commercial: Commercial real estate 547,202 426,243 Commercial and industrial 73,852 62,869 Construction 108,649 80,498 Total 729,703 569,610 Consumer: Home equity 125,176 129,588 Other 9,913 10,012 Total 135,089 139,600 Total loans receivable 7,564,076 7,507,645 Less: ACL 8,619 8,463 Discounts/unearned loan fees 32,582 33,933 Premiums/deferred costs (47,931 ) (49,236 ) $ 7,570,806 $ 7,514,485
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 March 31, 2019 and September 30, 2018 , all loans 90 or more days delinquent were on nonaccrual status. March 31, 2019 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 $ 8,665 $ 5,158 $ 13,823 $ 3,927,534 $ 3,941,357 Correspondent purchased 4,186 932 5,118 2,499,826 2,504,944 Bulk purchased 2,764 2,799 5,563 268,267 273,830 Commercial: Commercial real estate 64 — 64 651,373 651,437 Commercial and industrial 1,303 — 1,303 71,741 73,044 Consumer: Home equity 430 514 944 123,999 124,943 Other 51 14 65 9,805 9,870 $ 17,463 $ 9,417 $ 26,880 $ 7,552,545 $ 7,579,425 September 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 $ 10,613 $ 5,025 $ 15,638 $ 3,968,362 $ 3,984,000 Correspondent purchased 3,846 458 4,304 2,536,913 2,541,217 Bulk purchased 3,521 3,063 6,584 288,386 294,970 Commercial: Commercial real estate 76 — 76 501,932 502,008 Commercial and industrial 250 — 250 61,255 61,505 Consumer: Home equity 472 521 993 128,351 129,344 Other 61 10 71 9,833 9,904 $ 18,839 $ 9,077 $ 27,916 $ 7,495,032 $ 7,522,948
Recorded Investment in Loans, Nonaccrual	The following table presents the recorded investment, by class, in loans classified as nonaccrual at the dates presented. March 31, 2019 September 30, 2018 (Dollars in thousands) One- to four-family: Originated $ 6,872 $ 6,503 Correspondent purchased 932 863 Bulk purchased 2,799 3,063 Commercial: Commercial real estate 1,288 — Commercial and industrial — — Consumer: Home equity 517 530 Other 20 10 $ 12,428 $ 10,969
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. March 31, 2019 September 30, 2018 Special Mention Substandard Special Mention Substandard (Dollars in thousands) One- to four-family: Originated $ 9,522 $ 19,247 $ 8,660 $ 22,409 Correspondent purchased 2,312 3,101 997 3,126 Bulk purchased 69 6,208 — 7,195 Commercial: Commercial real estate 3,675 1,288 1,251 1,368 Commercial and industrial 1,641 — 1,126 — Consumer: Home equity 110 834 298 894 Other 15 3 — 10 $ 17,344 $ 30,681 $ 12,332 $ 35,002
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 2019, 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. March 31, 2019 September 30, 2018 Credit Score LTV Credit Score LTV One- to four-family - originated 768 62 % 767 63 % One- to four-family - correspondent 764 66 764 67 One- to four-family - bulk purchased 761 61 758 62 Consumer - home equity 754 21 750 22 766 63 765 63
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. For the Three Months Ended For the Six Months Ended March 31, 2019 March 31, 2019 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 $ 117 $ 117 Correspondent purchased — — — — — — Bulk purchased 1 308 308 1 308 308 Commercial: Commercial real estate — — — — — — Commercial and industrial — — — — — — Consumer: Home equity — — — — — — Other — — — — — — 1 $ 308 $ 308 2 $ 425 $ 425 For the Three Months Ended For the Six Months Ended March 31, 2018 March 31, 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 2 $ 93 $ 94 3 $ 167 $ 176 Correspondent purchased — — — — — — Bulk purchased — — — — — — Commercial: Commercial real estate — — — — — — Commercial and industrial — — — — — — Consumer: Home equity — — — — — — Other — — — — — — 2 $ 93 $ 94 3 $ 167 $ 176 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 Six Months Ended March 31, 2019 March 31, 2018 March 31, 2019 March 31, 2018 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 $ 45 7 $ 434 1 $ 45 19 $ 1,254 Correspondent purchased — — 1 124 — — 1 124 Bulk purchased — — — — — — 3 1,040 Commercial: Commercial real estate — — — — — — — — Commercial and industrial — — — — — — — — Consumer: Home equity — — — — — — 4 133 Other — — — — — — — — 1 $ 45 8 $ 558 1 $ 45 27 $ 2,551
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. March 31, 2019 September 30, 2018 Unpaid Unpaid Recorded Principal Recorded Principal Investment Balance Investment Balance (Dollars in thousands) One- to four-family: Originated $ 15,299 $ 15,826 $ 18,857 $ 19,388 Correspondent purchased 2,170 2,274 2,668 2,768 Bulk purchased 5,131 5,849 6,011 6,976 Commercial: Commercial real estate — — — — Commercial and industrial — — — — Consumer: Home equity 398 548 504 720 Other — 30 — 25 $ 22,998 $ 24,527 $ 28,040 $ 29,877 For the Three Months Ended For the Six Months Ended March 31, 2019 March 31, 2018 March 31, 2019 March 31, 2018 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) One- to four-family: Originated $ 15,928 $ 167 $ 25,398 $ 251 16,980 352 26,896 548 Correspondent purchased 2,177 23 3,362 31 2,251 45 3,530 64 Bulk purchased 5,230 43 6,319 42 5,453 86 6,761 95 Commercial: Commercial real estate — — — — — — — — Commercial and industrial — — — — — — — — Consumer: Home equity 436 7 606 9 461 16 637 19 Other — — — — — — — — $ 23,771 $ 240 $ 35,685 $ 333 $ 25,145 $ 499 $ 37,824 $ 726
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. March 31, 2019 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,926,057 $ 2,502,775 $ 268,699 $ 6,697,531 $ 724,481 $ 134,415 $ 7,556,427 Recorded investment in loans individually evaluated for impairment 15,300 2,169 5,131 22,600 — 398 22,998 $ 3,941,357 $ 2,504,944 $ 273,830 $ 6,720,131 $ 724,481 $ 134,813 $ 7,579,425 ACL for loans collectively evaluated for impairment $ 2,173 $ 1,392 $ 802 $ 4,367 $ 4,088 $ 164 $ 8,619 September 30, 2018 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Recorded investment in loans collectively evaluated for impairment $ 3,965,143 $ 2,538,549 $ 288,959 $ 6,792,651 $ 563,513 $ 138,744 $ 7,494,908 Recorded investment in loans individually evaluated for impairment 18,857 2,668 6,011 27,536 — 504 28,040 $ 3,984,000 $ 2,541,217 $ 294,970 $ 6,820,187 $ 563,513 $ 139,248 $ 7,522,948 ACL for loans collectively evaluated for impairment $ 2,953 $ 1,861 $ 925 $ 5,739 $ 2,556 $ 168 $ 8,463 For the Three Months Ended March 31, 2019 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 2,761 $ 1,748 $ 836 $ 5,345 $ 3,034 $ 179 $ 8,558 Charge-offs (10 ) — — (10 ) — (2 ) (12 ) Recoveries 2 — 17 19 25 29 73 Provision for credit losses (580 ) (356 ) (51 ) (987 ) 1,029 (42 ) — Ending balance $ 2,173 $ 1,392 $ 802 $ 4,367 $ 4,088 $ 164 $ 8,619 For the Six Months Ended March 31, 2019 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 2,953 $ 1,861 $ 925 $ 5,739 $ 2,556 $ 168 $ 8,463 Charge-offs (30 ) — (26 ) (56 ) — (12 ) (68 ) Recoveries 5 — 106 111 27 86 224 Provision for credit losses (755 ) (469 ) (203 ) (1,427 ) 1,505 (78 ) — Ending balance $ 2,173 $ 1,392 $ 802 $ 4,367 $ 4,088 $ 164 $ 8,619 For the Three Months Ended March 31, 2018 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 3,115 $ 1,902 $ 1,000 $ 6,017 $ 2,157 $ 196 $ 8,370 Charge-offs (68 ) (128 ) — (196 ) — (4 ) (200 ) Recoveries 17 — 196 213 — 7 220 Provision for credit losses 92 260 (196 ) 156 (119 ) (37 ) — Ending balance $ 3,156 $ 2,034 $ 1,000 $ 6,190 $ 2,038 $ 162 $ 8,390 For the Six Months Ended March 31, 2018 One- to Four-Family Correspondent Bulk Originated Purchased Purchased Total Commercial Consumer Total (Dollars in thousands) Beginning balance $ 3,173 $ 1,922 $ 1,000 $ 6,095 $ 2,112 $ 191 $ 8,398 Charge-offs (71 ) (128 ) — (199 ) — (35 ) (234 ) Recoveries 17 — 196 213 — 13 226 Provision for credit losses 37 240 (196 ) 81 (74 ) (7 ) — Ending balance $ 3,156 $ 2,034 $ 1,000 $ 6,190 $ 2,038 $ 162 $ 8,390

Fair Value Of Financial Instr_2

Fair Value Of Financial Instruments (Tables)	6 Months Ended
	Mar. 31, 2019
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. The Company did not have any Level 3 financial instruments measured at fair value on a recurring basis at March 31, 2019 or September 30, 2018 . The Company did not have any liabilities measured at fair value at September 30, 2018. March 31, 2019 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: MBS $ 474,844 $ — $ 474,844 $ — GSE debentures 267,741 — 267,741 — Municipal bonds 4,143 — 4,143 — 746,728 — 746,728 — Interest rate swaps — — — — $ 746,728 $ — $ 746,728 $ — Liabilities: Interest rate swaps $ 11,907 $ — $ 11,907 $ — September 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: MBS $ 445,090 $ — $ 445,090 $ — GSE debentures 265,398 — 265,398 — Municipal bonds 4,126 — 4,126 — 714,614 — 714,614 — Interest rate swaps 9,685 — 9,685 — $ 724,299 $ — $ 724,299 $ —
Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments	The carrying amounts and estimated fair values of the Company's financial instruments by fair value hierarchy, at the dates presented, were as follows: March 31, 2019 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Cash and cash equivalents $ 218,051 $ 218,051 $ 218,051 $ — $ — AFS securities 746,728 746,728 — 746,728 — HTM securities 527,460 526,099 — 526,099 — Loans receivable 7,570,806 7,646,753 — — 7,646,753 FHLB stock 102,631 102,631 102,631 — — Liabilities: Deposits 5,701,111 5,696,333 2,778,862 2,917,471 — FHLB borrowings 2,239,985 2,214,700 100,001 2,114,699 — Other borrowings 100,000 98,843 — 98,843 — Interest rate swaps 11,907 11,907 — 11,907 — September 30, 2018 Carrying Estimated Fair Value Amount Total Level 1 Level 2 Level 3 (Dollars in thousands) Assets: Cash and cash equivalents $ 139,055 $ 139,055 $ 139,055 $ — $ — AFS securities 714,614 714,614 — 714,614 — HTM securities 612,318 601,071 — 601,071 — Loans receivable 7,514,485 7,418,026 — — 7,418,026 FHLB stock 99,726 99,726 99,726 — — Interest rate swaps 9,685 9,685 — 9,685 — Liabilities: Deposits 5,603,354 5,569,591 2,666,297 2,903,294 — FHLB borrowings 2,174,981 2,145,477 100,000 2,045,477 — Other borrowings 110,052 109,465 10,503 98,962 —

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following is a summary of changes in the components of AOCI, net of tax, for the periods presented. For the Three Months Ended March 31, 2019 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (Dollars in thousands) Beginning balance $ 537 $ (2,414 ) $ (1,877 ) Other comprehensive income (loss), before reclassifications 3,061 (6,500 ) (3,439 ) Amount reclassified from AOCI — (100 ) (100 ) Other comprehensive income (loss) 3,061 (6,600 ) (3,539 ) Ending balance $ 3,598 $ (9,014 ) $ (5,416 ) For the Six Months Ended March 31, 2019 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (Dollars in thousands) Beginning balance $ (2,990 ) $ 7,330 $ 4,340 Other comprehensive income (loss), before reclassifications 6,588 (16,395 ) (9,807 ) Amount reclassified from AOCI — 51 51 Other comprehensive income (loss) 6,588 (16,344 ) (9,756 ) Ending balance $ 3,598 $ (9,014 ) $ (5,416 ) For the Three Months Ended March 31, 2018 Unrealized Unrealized Gains (Losses) Gains (Losses) on AFS on Cash Flow Total Securities Hedges AOCI (Dollars in thousands) Beginning balance $ 2,124 $ 950 $ 3,074 Other comprehensive income (loss), before reclassifications (1,898 ) 3,456 1,558 Amount reclassified from AOCI — (140 ) (140 ) Other comprehensive income (loss) (1,898 ) 3,316 1,418 Reclassification of certain income tax effects related to adoption of ASU 2018-02 461 206 667 Ending balance $ 687 $ 4,472 $ 5,159 For the Six Months Ended March 31, 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 (3,064 ) 5,052 1,988 Amount reclassified from AOCI — (414 ) (414 ) Other comprehensive income (loss) (3,064 ) 4,638 1,574 Reclassification of certain income tax effects related to adoption of ASU 2018-02 461 206 667 Ending balance $ 687 $ 4,472 $ 5,159

Summary Of Significant Accoun_3

Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Sep. 30, 2018
Accounting Policies [Abstract]
Cash and cash equivalents			$ 218,051	$ 139,055
Restricted cash and cash equivalents			$ 13,400	$ 0
Restricted cash and cash equivalents, balance sheet location			us-gaap:OtherAssets
Cumulative effect of adopting ASU 2014-09	$ 394	$ 0	$ 394

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share
Net income	$ 24,554	$ 24,383	$ 23,330	$ 31,836	$ 48,937	$ 55,166
Income allocated to participating securities	(10)		(10)		(19)	(23)
Net income available to common stockholders	$ 24,544		$ 23,320		$ 48,918	$ 55,143
Total basic average common shares outstanding	137,634,820		134,428,227		137,592,409	134,400,300
Effect of dilutive stock options	55,897		47,001		48,717	70,959
Total diluted average common shares outstanding	137,690,717		134,475,228		137,641,126	134,471,259
Net EPS:
Basic	$ 0.18		$ 0.17		$ 0.36	$ 0.41
Diluted	$ 0.18		$ 0.17		$ 0.36	$ 0.41
Antidilutive stock options, excluded from the diluted average common shares outstanding calculation	494,395		598,195		529,261	527,642
Average Common Shares Outstanding [Member]
Earnings Per Share
Total basic average common shares outstanding	137,593,062		134,386,469		137,571,533	134,379,424
Average Committed ESOP Shares Outstanding [Member]
Earnings Per Share
Total basic average common shares outstanding	41,758		41,758		20,876	20,876

Securities (Narrative) (Details

Securities (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2019	Sep. 30, 2018
Marketable Securities [Abstract]
Other than temporary impairments, amount	$ 0	$ 0

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	Mar. 31, 2019	Sep. 30, 2018
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	$ 741,975	$ 718,564
Available-for-sale Securities, Gross Unrealized Gains	6,272	3,300
Available-for-sale Securities, Gross Unrealized Losses	1,519	7,250
Available-for-sale Securities, Estimated Fair Value	746,728	714,614
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	527,460	612,318
Held-to-maturity Securities, Gross Unrealized Gains	5,126	4,514
Held-to-maturity Securities, Gross Unrealized Losses	6,487	15,761
Held-to-maturity securities, Estimated Fair Value	526,099	601,071
MBS [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	469,455	445,883
Available-for-sale Securities, Gross Unrealized Gains	5,995	3,270
Available-for-sale Securities, Gross Unrealized Losses	606	4,063
Available-for-sale Securities, Estimated Fair Value	474,844	445,090
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	510,450	591,900
Held-to-maturity Securities, Gross Unrealized Gains	5,107	4,514
Held-to-maturity Securities, Gross Unrealized Losses	6,461	15,589
Held-to-maturity securities, Estimated Fair Value	509,096	580,825
GSE Debentures [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	268,375	268,525
Available-for-sale Securities, Gross Unrealized Gains	274	30
Available-for-sale Securities, Gross Unrealized Losses	908	3,157
Available-for-sale Securities, Estimated Fair Value	267,741	265,398
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost	4,145	4,156
Available-for-sale Securities, Gross Unrealized Gains	3	0
Available-for-sale Securities, Gross Unrealized Losses	5	30
Available-for-sale Securities, Estimated Fair Value	4,143	4,126
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Amortized Cost	17,010	20,418
Held-to-maturity Securities, Gross Unrealized Gains	19	0
Held-to-maturity Securities, Gross Unrealized Losses	26	172
Held-to-maturity securities, Estimated Fair Value	$ 17,003	$ 20,246

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	Mar. 31, 2019	Sep. 30, 2018
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	$ 38,973	$ 430,424
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	58	5,058
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	167,588	156,178
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	1,461	2,192
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	1,881	76,578
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	4	1,075
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	339,786	363,491
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	6,483	14,686
MBS [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	11,197	324,563
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	55	3,797
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	67,001	8,129
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	551	266
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	1,551	58,233
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	2	904
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	331,809	362,806
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	6,459	14,685
GSE Debentures [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	27,776	101,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	3	1,231
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	99,077	148,049
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	905	1,926
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	0	4,126
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	0	30
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	1,510	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	5	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Estimated Fair Value	330	18,345
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less Than 12 Months, Unrealized Losses	2	171
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Estimated Fair Value	7,977	685
Held-to-maturity Securities, Continuous Unrealized Loss Position, Equal to or Greater Than 12 Months, Unrealized Losses	$ 24	$ 1

Securities (Schedule Of Contrac

Securities (Schedule Of Contractual Maturities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Investment Holdings [Line Items]
Available-for-sale Securities, Amortized Cost	$ 741,975	$ 718,564
Available-for-sale Securities, Estimated Fair Value	746,728	714,614
Held-to-maturity Securities, Amortized Cost	527,460	612,318
Held-to-maturity Securities, Estimated Fair Value	526,099	601,071
Debt Securities [Member]
Investment Holdings [Line Items]
Available-for-sale Securities, One year or less, Amortized Cost	5,400
Available-for-sale Securities, One year through five years, Amortized Cost	267,120
Available-for-sale Securities, Amortized Cost	272,520
Available-for-sale Securities, One year or less, Estimated Fair Value	5,398
Available-for-sale Securities, One year through five years, Estimated Fair Value	266,486
Available-for-sale Securities, Estimated Fair Value	271,884
Held-to-maturity Securities, One year or less, Amortized Cost	3,842
Held-to-maturity Securities, One year through five years, Amortized Cost	13,168
Held-to-maturity Securities, Amortized Cost	17,010
Held-to-maturity Securities, One year or less, Estimated Fair Value	3,837
Held-to-maturity Securities, One year through five years, Estimated Fair Value	13,166
Held-to-maturity Securities, Estimated Fair Value	17,003
MBS [Member]
Investment Holdings [Line Items]
Available-for-sale Securities, Amortized Cost	469,455	445,883
Available-for-sale Securities, Estimated Fair Value	474,844	445,090
Held-to-maturity Securities, Amortized Cost	510,450	591,900
Held-to-maturity Securities, Estimated Fair Value	$ 509,096	$ 580,825

Securities (Schedule Of Taxable

Securities (Schedule Of Taxable And Non-taxable Components Of Interest Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Marketable Securities [Abstract]
Taxable	$ 1,419	$ 998	$ 2,767	$ 1,878
Non-taxable	86	96	179	210
Interest income on investment securities	$ 1,505	$ 1,094	$ 2,946	$ 2,088

Securities (Schedule Of Carryin

Securities (Schedule Of Carrying Value Of Securities Pledged As Collateral) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Marketable Securities [Abstract]
Public unit deposits	$ 467,812	$ 515,553
Repurchase agreements	107,862	108,360
Federal Reserve Bank of Kansas City (FRB of Kansas City)	7,979	9,529
Total securities pledged as collateral	$ 583,653	$ 633,442

Loans Receivable And Allowanc_3

Loans Receivable And Allowance For Credit Losses (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018
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	1.20
Recorded investment of loans in process of foreclosure	$ 3,100	$ 2,900
Carrying value of residential OREO	871	1,300
Loans receivable	7,570,806	7,514,485
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 Allowanc_4

Loans Receivable And Allowance For Credit Losses (Summary Of Loans Receivable) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Loans Receivable [Line Items]
Loans receivable, gross	$ 7,564,076	$ 7,507,645
ACL	8,619	8,463
Discounts/unearned loan fees	32,582	33,933
Premiums/deferred costs	(47,931)	(49,236)
Loans receivable, net	7,570,806	7,514,485
One- to Four-Family Segment [Member]
Loans Receivable [Line Items]
Loans receivable, gross	6,699,284	6,798,435
One- to Four-Family Segment [Member] | Originated [Member]
Loans Receivable [Line Items]
Loans receivable, gross	3,922,565	3,965,692
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Loans Receivable [Line Items]
Loans receivable, gross	2,470,619	2,505,987
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Loans Receivable [Line Items]
Loans receivable, gross	272,575	293,607
One- to Four-Family Segment [Member] | Construction [Member]
Loans Receivable [Line Items]
Loans receivable, gross	33,525	33,149
Commercial Segment [Member]
Loans Receivable [Line Items]
Loans receivable, gross	729,703	569,610
Commercial Segment [Member] | Construction [Member]
Loans Receivable [Line Items]
Loans receivable, gross	108,649	80,498
Commercial Segment [Member] | Commercial Real Estate [Member]
Loans Receivable [Line Items]
Loans receivable, gross	547,202	426,243
Commercial Segment [Member] | Commercial and Industrial [Member]
Loans Receivable [Line Items]
Loans receivable, gross	73,852	62,869
Consumer Segment [Member]
Loans Receivable [Line Items]
Loans receivable, gross	135,089	139,600
Consumer Segment [Member] | Home Equity [Member]
Loans Receivable [Line Items]
Loans receivable, gross	125,176	129,588
Consumer Segment [Member] | Other [Member]
Loans Receivable [Line Items]
Loans receivable, gross	$ 9,913	$ 10,012

Loans Receivable And Allowanc_5

Loans Receivable And Allowance For Credit Losses (Recorded Investment in Loans, Past Due) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	$ 26,880	$ 27,916
Financing receivable, current loans	7,552,545	7,495,032
Financing receivable, total recorded investment	7,579,425	7,522,948
Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	17,463	18,839
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	9,417	9,077
One- to Four-Family Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total recorded investment	6,720,131	6,820,187
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	13,823	15,638
Financing receivable, current loans	3,927,534	3,968,362
Financing receivable, total recorded investment	3,941,357	3,984,000
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	8,665	10,613
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	5,158	5,025
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	5,118	4,304
Financing receivable, current loans	2,499,826	2,536,913
Financing receivable, total recorded investment	2,504,944	2,541,217
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	4,186	3,846
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	932	458
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	5,563	6,584
Financing receivable, current loans	268,267	288,386
Financing receivable, total recorded investment	273,830	294,970
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	2,764	3,521
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	2,799	3,063
Commercial Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total recorded investment	724,481	563,513
Commercial Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	64	76
Financing receivable, current loans	651,373	501,932
Financing receivable, total recorded investment	651,437	502,008
Commercial Segment [Member] | Commercial Real Estate [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	64	76
Commercial Segment [Member] | Commercial Real Estate [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
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	1,303	250
Financing receivable, current loans	71,741	61,255
Financing receivable, total recorded investment	73,044	61,505
Commercial Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	1,303	250
Commercial Segment [Member] | Commercial and Industrial [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	134,813	139,248
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	944	993
Financing receivable, current loans	123,999	128,351
Financing receivable, total recorded investment	124,943	129,344
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	430	472
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	514	521
Consumer Segment [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, total delinquent loans	65	71
Financing receivable, current loans	9,805	9,833
Financing receivable, total recorded investment	9,870	9,904
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	51	61
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	$ 14	$ 10

Loans Receivable And Allowanc_6

Loans Receivable And Allowance For Credit Losses (Recorded Investment in Loans, Nonaccrual) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	$ 12,428	$ 10,969
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	6,872	6,503
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	932	863
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	2,799	3,063
Commercial Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	1,288	0
Commercial Segment [Member] | Commercial and Industrial [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	517	530
Consumer Segment [Member] | Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, nonaccrual loans	$ 20	$ 10

Loans Receivable And Allowanc_7

Loans Receivable And Allowance For Credit Losses (Recorded Investment In Classified Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	$ 7,579,425	$ 7,522,948
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	17,344	12,332
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	30,681	35,002
One- to Four-Family Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	6,720,131	6,820,187
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	3,941,357	3,984,000
One- to Four-Family Segment [Member] | Originated [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	9,522	8,660
One- to Four-Family Segment [Member] | Originated [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	19,247	22,409
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	2,504,944	2,541,217
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	2,312	997
One- to Four-Family Segment [Member] | Correspondent Purchased [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	3,101	3,126
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	273,830	294,970
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	69	0
One- to Four-Family Segment [Member] | Bulk Purchased [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	6,208	7,195
Commercial Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	724,481	563,513
Commercial Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	651,437	502,008
Commercial Segment [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	3,675	1,251
Commercial Segment [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	1,288	1,368
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	73,044	61,505
Commercial Segment [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	1,641	1,126
Commercial Segment [Member] | Commercial and Industrial [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	134,813	139,248
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	124,943	129,344
Consumer Segment [Member] | Home Equity [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	110	298
Consumer Segment [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	834	894
Consumer Segment [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	9,870	9,904
Consumer Segment [Member] | Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	15	0
Consumer Segment [Member] | Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, total recorded investment	$ 3	$ 10

Loans Receivable And Allowanc_8

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	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	766	765
Weighted average LTV	63.00%	63.00%
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	768	767
Weighted average LTV	62.00%	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	66.00%	67.00%
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	761	758
Weighted average LTV	61.00%	62.00%
Consumer Segment [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Weighted average credit score	754	750
Weighted average LTV	21.00%	22.00%

Loans Receivable And Allowanc_9

Loans Receivable And Allowance For Credit Losses (Troubled Debt Restructurings On Financing Receivables) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019USD ($)contract	Mar. 31, 2018USD ($)contract	Mar. 31, 2019USD ($)contract	Mar. 31, 2018USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	2	2	3
Pre-Restructured Outstanding	$ 308	$ 93	$ 425	$ 167
Post-Restructured Outstanding	$ 308	$ 94	$ 425	$ 176
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	2	1	3
Pre-Restructured Outstanding	$ 0	$ 93	$ 117	$ 167
Post-Restructured Outstanding	$ 0	$ 94	$ 117	$ 176
One- to Four-Family Segment [Member] | Correspondent Purchased [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
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	0	1	0
Pre-Restructured Outstanding	$ 308	$ 0	$ 308	$ 0
Post-Restructured Outstanding	$ 308	$ 0	$ 308	$ 0
Commercial Segment [Member] | Commercial Real Estate [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
Commercial Segment [Member] | Commercial and Industrial [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	0	0	0
Pre-Restructured Outstanding	$ 0	$ 0	$ 0	$ 0
Post-Restructured Outstanding	$ 0	$ 0	$ 0	$ 0
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 Allowan_10

Loans Receivable And Allowance For Credit Losses (Troubled Debt Restructurings On Financing Receivables That Subsequently Defaulted) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019USD ($)contract	Mar. 31, 2018USD ($)contract	Mar. 31, 2019USD ($)contract	Mar. 31, 2018USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	8	1	27
Recorded Investment | $	$ 45	$ 558	$ 45	$ 2,551
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	7	1	19
Recorded Investment | $	$ 45	$ 434	$ 45	$ 1,254
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1	0	1
Recorded Investment | $	$ 0	$ 124	$ 0	$ 124
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	3
Recorded Investment | $	$ 0	$ 0	$ 0	$ 1,040
Commercial Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0
Commercial Segment [Member] | Commercial and Industrial [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	0	0	4
Recorded Investment | $	$ 0	$ 0	$ 0	$ 133
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 Allowan_11

Loans Receivable And Allowance For Credit Losses (Impaired Loans By Class, Instant Related Disclosures) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 22,998	$ 28,040
Unpaid Principal Balance	24,527	29,877
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	15,299	18,857
Unpaid Principal Balance	15,826	19,388
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,170	2,668
Unpaid Principal Balance	2,274	2,768
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,131	6,011
Unpaid Principal Balance	5,849	6,976
Commercial Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Commercial Segment [Member] | Commercial and Industrial [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	398	504
Unpaid Principal Balance	548	720
Consumer Segment [Member] | Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	0
Unpaid Principal Balance	$ 30	$ 25

Loans Receivable And Allowan_12

Loans Receivable And Allowance For Credit Losses (Impaired Loans By Class, Duration Related Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 23,771	$ 35,685	$ 25,145	$ 37,824
Interest Income Recognized	240	333	499	726
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	15,928	25,398	16,980	26,896
Interest Income Recognized	167	251	352	548
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,177	3,362	2,251	3,530
Interest Income Recognized	23	31	45	64
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	5,230	6,319	5,453	6,761
Interest Income Recognized	43	42	86	95
Commercial Segment [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	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	436	606	461	637
Interest Income Recognized	7	9	16	19
Consumer Segment [Member] | Other [Member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	0	0	0
Interest Income Recognized	$ 0	$ 0	$ 0	$ 0

Loans Receivable And Allowan_13

Loans Receivable And Allowance For Credit Losses (Allowance For Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 8,558	$ 8,370	$ 8,463	$ 8,398
Charge-offs	(12)	(200)	(68)	(234)
Recoveries	73	220	224	226
Provision for credit losses	0	0	0	0
Ending Balance	8,619	8,390	8,619	8,390
One- to Four-Family Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	5,345	6,017	5,739	6,095
Charge-offs	(10)	(196)	(56)	(199)
Recoveries	19	213	111	213
Provision for credit losses	(987)	156	(1,427)	81
Ending Balance	4,367	6,190	4,367	6,190
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,761	3,115	2,953	3,173
Charge-offs	(10)	(68)	(30)	(71)
Recoveries	2	17	5	17
Provision for credit losses	(580)	92	(755)	37
Ending Balance	2,173	3,156	2,173	3,156
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,748	1,902	1,861	1,922
Charge-offs	0	(128)	0	(128)
Recoveries	0	0	0	0
Provision for credit losses	(356)	260	(469)	240
Ending Balance	1,392	2,034	1,392	2,034
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	836	1,000	925	1,000
Charge-offs	0	0	(26)	0
Recoveries	17	196	106	196
Provision for credit losses	(51)	(196)	(203)	(196)
Ending Balance	802	1,000	802	1,000
Commercial Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,034	2,157	2,556	2,112
Charge-offs	0	0	0	0
Recoveries	25	0	27	0
Provision for credit losses	1,029	(119)	1,505	(74)
Ending Balance	4,088	2,038	4,088	2,038
Consumer Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	179	196	168	191
Charge-offs	(2)	(4)	(12)	(35)
Recoveries	29	7	86	13
Provision for credit losses	(42)	(37)	(78)	(7)
Ending Balance	$ 164	$ 162	$ 164	$ 162

Loans Receivable And Allowan_14

Loans Receivable And Allowance For Credit Losses (Summary Of Loan Portfolio Segment Disaggregated By The Company's Impairment Method) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	$ 7,556,427	$ 7,494,908
Recorded investment in loans individually evaluated for impairment	22,998	28,040
Financing receivable, total recorded investment	7,579,425	7,522,948
ACL for loans collectively evaluated for impairment	8,619	8,463
One- to Four-Family Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	6,697,531	6,792,651
Recorded investment in loans individually evaluated for impairment	22,600	27,536
Financing receivable, total recorded investment	6,720,131	6,820,187
ACL for loans collectively evaluated for impairment	4,367	5,739
One- to Four-Family Segment [Member] | Originated [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	3,926,057	3,965,143
Recorded investment in loans individually evaluated for impairment	15,300	18,857
Financing receivable, total recorded investment	3,941,357	3,984,000
ACL for loans collectively evaluated for impairment	2,173	2,953
One- to Four-Family Segment [Member] | Correspondent Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	2,502,775	2,538,549
Recorded investment in loans individually evaluated for impairment	2,169	2,668
Financing receivable, total recorded investment	2,504,944	2,541,217
ACL for loans collectively evaluated for impairment	1,392	1,861
One- to Four-Family Segment [Member] | Bulk Purchased [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	268,699	288,959
Recorded investment in loans individually evaluated for impairment	5,131	6,011
Financing receivable, total recorded investment	273,830	294,970
ACL for loans collectively evaluated for impairment	802	925
Commercial Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	724,481	563,513
Recorded investment in loans individually evaluated for impairment	0	0
Financing receivable, total recorded investment	724,481	563,513
ACL for loans collectively evaluated for impairment	4,088	2,556
Consumer Segment [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment in loans collectively evaluated for impairment	134,415	138,744
Recorded investment in loans individually evaluated for impairment	398	504
Financing receivable, total recorded investment	134,813	139,248
ACL for loans collectively evaluated for impairment	$ 164	$ 168

Borrowed Funds (Narrative) (Det

Borrowed Funds (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Debt Disclosure [Abstract]
Interest rate swaps, notional amount	$ 640,000,000		$ 640,000,000
Interest rate swaps, notional amount					$ 475,000,000
FHLB advances, variable rate	640,000,000		$ 640,000,000		$ 475,000,000
Interest rate swaps, remaining term to maturity			4 years 10 months 24 days		5 years 9 months 18 days
Interest rate swaps, fair value	(11,900,000)		$ (11,900,000)		$ 9,700,000
Interest rate swaps, amount reclassified from AOCI	(100,000)	$ (140,000)	51,000	$ (414,000)
Interest rate swaps, future amount to be reclassified from AOCI			888,000
Interest rate swaps, amount of hedge ineffectiveness recognized			0
Interest rate swaps, collateral posted	$ 13,400,000		$ 13,400,000
Interest rate swaps, collateral held					(10,000,000)
Subordinated Debentures Subject to Mandatory Redemption [Member]
Junior subordinated debentures					$ 10,100,000

Fair Value Of Financial Instr_3

Fair Value Of Financial Instruments (Narrative) (Details) $ in Thousands	Mar. 31, 2019USD ($)	Sep. 30, 2018USD ($)	Mar. 31, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
ACL maintained for loans individually evaluated for impairment	$ 0	$ 0	$ 0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans individually evaluated for impairment	2,800		4,600
OREO	$ 582		686
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	$ 2,800		4,600
OREO	$ 582		$ 686

Fair Value Of Financial Instr_4

Fair Value Of Financial Instruments (Schedule Of Fair Value Assets Measured On A Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	$ 746,728	$ 714,614
Interest rate swaps	11,907
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	11,907
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	0
GSE Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	267,741	265,398
MBS [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	474,844	445,090
Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	4,143	4,126
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	746,728	714,614
Interest Rate Swaps	0	9,685
Assets	746,728	724,299
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	0
Assets	0	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	746,728	714,614
Interest Rate Swaps	0	9,685
Assets	746,728	724,299
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	0
Interest Rate Swaps	0	0
Assets	0	0
Fair Value, Measurements, Recurring [Member] | GSE Debentures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS securities	474,844	445,090
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	474,844	445,090
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	267,741	265,398
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	267,741	265,398
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	4,143	4,126
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	4,143	4,126
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 Of Financial Instr_5

Fair Value Of Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018
Assets:
AFS securities	$ 746,728	$ 714,614
HTM securities	526,099	601,071
Liabilities:
Interest rate swaps	11,907
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Liabilities:
Interest rate swaps	0
Significant Other Observable Inputs (Level 2) [Member]
Liabilities:
Interest rate swaps	11,907
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Loans receivable	2,800		$ 4,600
Liabilities:
Interest rate swaps	0
Carrying Amount [Member]
Assets:
Cash and cash equivalents	218,051	139,055
AFS securities	746,728	714,614
HTM securities	527,460	612,318
Loans receivable	7,570,806	7,514,485
FHLB stock	102,631	99,726
Interest rate swaps		9,685
Liabilities:
Deposits	5,701,111	5,603,354
FHLB borrowings	2,239,985	2,174,981
Other borrowings	100,000	110,052
Interest rate swaps	11,907
Estimated Fair Value [Member]
Assets:
Cash and cash equivalents	218,051	139,055
AFS securities	746,728	714,614
HTM securities	526,099	601,071
Loans receivable	7,646,753	7,418,026
FHLB stock	102,631	99,726
Interest rate swaps		9,685
Liabilities:
Deposits	5,696,333	5,569,591
FHLB borrowings	2,214,700	2,145,477
Other borrowings	98,843	109,465
Interest rate swaps	11,907
Estimated Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Cash and cash equivalents	218,051	139,055
AFS securities	0	0
HTM securities	0	0
Loans receivable	0	0
FHLB stock	102,631	99,726
Interest rate swaps		0
Liabilities:
Deposits	2,778,862	2,666,297
FHLB borrowings	100,001	100,000
Other borrowings	0	10,503
Interest rate swaps	0
Estimated Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash and cash equivalents	0	0
AFS securities	746,728	714,614
HTM securities	526,099	601,071
Loans receivable	0	0
FHLB stock	0	0
Interest rate swaps		9,685
Liabilities:
Deposits	2,917,471	2,903,294
FHLB borrowings	2,114,699	2,045,477
Other borrowings	98,843	98,962
Interest rate swaps	11,907
Estimated Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Cash and cash equivalents	0	0
AFS securities	0	0
HTM securities	0	0
Loans receivable	7,646,753	7,418,026
FHLB stock	0	0
Interest rate swaps		0
Liabilities:
Deposits	0	0
FHLB borrowings	0	0
Other borrowings	0	$ 0
Interest rate swaps	$ 0

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ 4,340			$ 4,340
Other comprehensive income (loss)	$ (3,539)	(6,217)	$ 1,418	$ 156
Reclassification of certain income tax effects related to adoption of ASU 2018-02			0
Ending balance	(5,416)				(5,416)
Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	537	(2,990)	2,124	3,290	(2,990)	$ 3,290
Other comprehensive income (loss), before reclassifications	3,061		(1,898)		6,588	(3,064)
Amount reclassified from AOCI	0		0		0	0
Other comprehensive income (loss)	3,061		(1,898)		6,588	(3,064)
Reclassification of certain income tax effects related to adoption of ASU 2018-02			461			461
Ending balance	3,598	537	687	2,124	3,598	687
Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,414)	7,330	950	(372)	7,330	(372)
Other comprehensive income (loss), before reclassifications	(6,500)		3,456		(16,395)	5,052
Amount reclassified from AOCI	(100)		(140)		51	(414)
Other comprehensive income (loss)	(6,600)		3,316		(16,344)	4,638
Reclassification of certain income tax effects related to adoption of ASU 2018-02			206			206
Ending balance	(9,014)	(2,414)	4,472	950	(9,014)	4,472
AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,877)	4,340	3,074	2,918	4,340	2,918
Other comprehensive income (loss), before reclassifications	(3,439)		1,558		(9,807)	1,988
Amount reclassified from AOCI	(100)		(140)		51	(414)
Other comprehensive income (loss)	(3,539)	(6,217)	1,418	156	(9,756)	1,574
Reclassification of certain income tax effects related to adoption of ASU 2018-02			667			667
Ending balance	$ (5,416)	$ (1,877)	$ 5,159	$ 3,074	$ (5,416)	$ 5,159

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Revenue from Contract with Customer [Abstract]
Cumulative effect of adopting ASU 2014-09	$ 394	$ 0	$ 394
Revenue from contracts with customers			8,100
Interchange network charges			$ 1,700	$ 1,500