Washington Federal (WAFD) 10-Q 28 Jul 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2016	Jul. 26, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Entity Registrant Name	WASHINGTON FEDERAL INC
Entity Central Index Key	936,528
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		90,489,424

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
ASSETS
Cash and cash equivalents	$ 530,055	$ 284,049
Available-for-sale securities, at fair value	1,969,869	2,380,563
Held-to-maturity securities, at amortized cost	1,492,480	1,643,216
Loans receivable, net	9,628,576	9,170,634
Interest receivable	36,888	40,429
Premises and equipment, net	295,348	276,247
Real estate owned	31,682	61,098
FHLB and FRB stock	117,205	107,198
Bank owned life insurance	206,377	102,496
Intangible assets, including goodwill of $291,503	297,537	299,358
Federal and state income tax assets, net	16,189	14,513
Other assets	199,394	188,523
Assets	14,821,600	14,568,324
Customer accounts
Transaction deposit accounts	5,920,242	5,820,878
Time deposit accounts	4,658,674	4,810,825
Customer accounts	10,578,916	10,631,703
FHLB advances	2,080,000	1,830,000
Advance payments by borrowers for taxes and insurance	33,209	50,224
Accrued expenses and other liabilities	167,290	100,718
Liabilities	12,859,415	12,612,645
Stockholders’ equity
Common stock, $1.00 par value, 300,000,000 shares authorized; 134,145,522 and 133,695,803 shares issued; 90,226,193 and 92,936,395 shares outstanding	134,145	133,696
Paid-in capital	1,653,465	1,643,712
Accumulated other comprehensive (loss) income, net of taxes	(15,705)	353
Treasury stock, at cost; 43,919,329 and 40,759,408 shares	(721,884)	(651,836)
Retained earnings	912,164	829,754
Stockholders' Equity Attributable to Parent	1,962,185	1,955,679
Liabilities and Equity	$ 14,821,600	$ 14,568,324

CONSOLIDATED STATEMENTS OF FIN3

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Statement of Financial Position [Abstract]
Goodwill	$ 291,503	$ 291,503
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	134,145,522	133,695,803
Common stock, shares outstanding (in shares)	90,226,193	92,936,395
Treasury stock, shares (in shares)	43,919,329	40,759,408

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
INTEREST INCOME
Loans receivable	$ 113,728	$ 107,250	$ 339,802	$ 324,817
Mortgage-backed securities	15,297	16,995	49,130	54,313
Investment securities and cash equivalents	4,710	5,055	14,990	16,084
Interest Income	133,735	129,300	403,922	395,214
INTEREST EXPENSE
Customer accounts	13,274	12,485	39,062	38,504
FHLB advances and other borrowings	16,221	16,250	47,426	50,082
Interest Expense	29,495	28,735	86,488	88,586
Net interest income	104,240	100,565	317,434	306,628
Provision (release) for loan losses	(1,650)	(1,932)	(3,150)	(11,381)
Net interest income after provision (release) for loan losses	105,890	102,497	320,584	318,009
OTHER INCOME
Gain on sale of investment securities	0	9,639	0	9,639
Prepayment penalty on long-term debt	0	(7,941)	0	(10,554)
Loan fee income	1,101	1,915	3,784	6,028
Deposit fee income	5,297	5,156	16,564	16,538
Other income	4,088	3,042	11,502	6,380
Other income, total	10,486	11,811	31,850	28,031
OTHER EXPENSE
Compensation and benefits	27,333	29,824	86,217	89,453
Occupancy	8,515	8,492	26,075	24,866
FDIC insurance premiums	2,869	2,377	8,243	5,431
Product delivery	3,822	6,175	13,639	17,222
Information technology	7,669	3,783	23,832	11,695
Other expense	6,097	6,068	22,034	18,975
Other expense, total	56,305	56,719	180,040	167,642
Gain on real estate owned, net	5,087	3,188	10,401	4,976
Income before income taxes	65,158	60,777	182,795	183,374
Income tax expense	22,154	21,727	62,970	65,556
NET INCOME	$ 43,004	$ 39,050	$ 119,825	$ 117,818
PER SHARE DATA
Basic earnings (in dollars per share)	$ 0.47	$ 0.41	$ 1.30	$ 1.22
Diluted earnings (in dollars per share)	0.47	0.41	1.30	1.22
Dividends paid on common stock (in dollars per share)	$ 0.14	$ 0.13	$ 0.41	$ 0.41
Basic weighted average number of shares outstanding (in shares)	90,928,847	94,466,524	91,901,632	96,335,777
Diluted weighted average number of shares outstanding, including dilutive stock options (in shares)	91,468,662	94,904,262	92,393,644	96,726,085

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 43,004	$ 39,050	$ 119,825	$ 117,818
Other comprehensive income (loss) net of tax:
Net unrealized gain (loss) on available-for-sale investment securities	(965)	(35,001)	(4,409)	(21,378)
Reclassification adjustment of net gain (loss) from sale of available-for-sale securities included in net income	0	9,639	0	9,639
Related tax benefit (expense)	355	9,320	1,620	4,314
Other comprehensive income (loss) for available for sale securities, net of tax	(610)	(16,042)	(2,789)	(7,425)
Net unrealized gain (loss) on long-term borrowing hedge	(10,290)	5,587	(20,978)	(3,646)
Related tax benefit (expense)	3,782	(2,053)	7,709	1,340
Other comprehensive income (loss) on long term borrowing hedge, net of tax	(6,508)	3,534	(13,269)	(2,306)
Other comprehensive income (loss) net of tax	(7,118)	(12,508)	(16,058)	(9,731)
Comprehensive income	$ 35,886	$ 26,542	$ 103,767	$ 108,087

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance, beginning of period at Sep. 30, 2014	$ 1,973,283	$ 133,323	$ 1,638,211	$ 706,149	$ 20,708	$ (525,108)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	117,818			117,818
Other comprehensive income (loss)	(9,731)				(9,731)
Dividends on common stock	(24,597)			(24,597)
Compensation expense related to common stock options	900		900
Proceeds from exercise of common stock options	1,676	106	1,570
Restricted stock expense	2,821	259	2,562
Treasury stock acquired	(103,049)					(103,049)
Balance, end of period at Jun. 30, 2015	1,959,121	133,688	1,643,243	799,370	10,977	(628,157)
Balance, beginning of period at Sep. 30, 2015	1,955,679	133,696	1,643,712	829,754	353	(651,836)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	119,825			119,825
Other comprehensive income (loss)	(16,058)				(16,058)
Dividends on common stock	(37,415)			(37,415)
Compensation expense related to common stock options	900		900
Proceeds from exercise of common stock options	6,320	300	6,020
Restricted stock expense	2,982	149	2,833
Treasury stock acquired	(70,048)					(70,048)
Balance, end of period at Jun. 30, 2016	$ 1,962,185	$ 134,145	$ 1,653,465	$ 912,164	$ (15,705)	$ (721,884)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 119,825	$ 117,818
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, accretion and restricted stock expense	25,577	19,075
Cash received from (paid to) FDIC under loss share	1,826	(714)
Stock option compensation expense	900	900
Provision (release) for loan losses	(3,150)	(11,381)
Loss (gain) on sale of investment securities and real estate owned	(14,536)	(25,817)
Prepayment penalty from repayment of borrowings	0	10,554
Decrease (increase) in accrued interest receivable	3,541	12,487
Decrease (increase) in FDIC loss share receivable	0	1,795
Decrease (increase) in federal and state income tax receivable	7,654	10,883
Decrease (increase) in cash surrender value of bank owned life insurance	(3,881)	(1,720)
Decrease (increase) in other assets	(13,895)	(37,376)
Increase (decrease) in accrued expenses and other liabilities	45,594	(23,738)
Net cash provided by (used in) operating activities	169,455	72,766
CASH FLOWS FROM INVESTING ACTIVITIES
Origination of loans and principal repayments, net	(407,641)	(204,527)
Loans purchased	(51,646)	(183,406)
FHLB & FRB stock purchased	(36,347)	0
FHLB & FRB stock redemption	26,340	55,649
Available-for-sale securities purchased	(50,742)	(329,490)
Principal payments and maturities of available-for-sale securities	452,948	502,561
Proceeds on available-for-sale securities sold	0	244,749
Held-to-maturity securities purchased	0	(249,382)
Principal payments and maturities of held-to-maturity securities	146,211	207,954
Proceeds from sales of real estate owned	53,573	63,077
Purchase of bank owned life insurance	(100,000)	(100,000)
Premises and equipment purchased and REO improvements	(35,276)	(24,582)
Net cash provided by (used in) investing activities	(2,580)	(17,397)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in customer accounts	(52,711)	(138,390)
Proceeds from borrowings	918,000	0
Repayments of borrowings	(668,000)	(210,554)
Proceeds from exercise of common stock options and related tax benefit	6,320	1,676
Dividends paid on common stock	(37,415)	(38,997)
Treasury stock purchased	(70,048)	(103,049)
Increase (decrease) in advance payments by borrowers for taxes and insurance	(17,015)	1,652
Net cash provided by (used in) financing activities	79,131	(487,662)
Increase (decrease) in cash and cash equivalents	246,006	(432,293)
Cash and cash equivalents at beginning of period	284,049	781,843
Cash and cash equivalents at end of period	530,055	349,550
Non-cash investing activities
Real estate acquired through foreclosure	13,147	25,832
Cash paid during the period for
Interest	86,007	88,511
Income taxes	$ 47,289	$ 48,096

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Nature of Operations - Washington Federal, Inc. is a Washington corporation headquartered in Seattle, Washington. The Company is a bank holding company that conducts its operations through a federally-insured national bank subsidiary. The Bank is principally engaged in the business of attracting deposits from the general public and investing these funds, together with borrowings and other funds, in one-to-four family residential mortgage and construction loans, home equity loans, lines of credit, commercial and industrial loans, multi-family and other forms of real estate loans. As used throughout this document, the terms "Washington Federal" or the "Company" refer to Washington Federal, Inc. and its consolidated subsidiaries and the term "Bank" refers to the operating subsidiary Washington Federal, National Association. Basis of Presentation - The consolidated unaudited interim financial statements included in this report have been prepared by Washington Federal. All intercompany transactions and accounts have been eliminated in consolidation. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect amounts reported in the financial statements. Actual results could differ from these estimates. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation are reflected in the interim financial statements. The September 30, 2015 Consolidated Statement of Financial Condition was derived from audited financial statements. The information included in this Form 10-Q should be read in conjunction with the financial statements and related notes in the Company's 2015 Annual Report on Form 10-K (“ 2015 Form 10-K”). Interim results are not necessarily indicative of results for a full year. Summary of Significant Accounting Policies - The significant accounting policies used in preparation of the Company's consolidated financial statements are disclosed in its 2015 Form 10-K. There have not been any material changes in our significant accounting policies compared to those contained in our 2015 Form 10-K disclosure for the year ended September 30, 2015 . Off-Balance-Sheet Credit Exposures – The only material off-balance-sheet credit exposures are loans in process and unused lines of credit, which had a combined balance of $1,125,481,000 and $816,014,000 at June 30, 2016 and September 30, 2015 , respectively. The Company estimates losses on off-balance-sheet credit exposures by allocating a loss percentage derived from historical loss factors for each asset class.

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Jun. 30, 2016
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses . The amendments in this ASU were issued to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments that are not accounted for at fair value through net income, including loans held for investment, held-to- maturity debt securities, trade and other receivables, net investments in leases and other commitments to extend credit held by a reporting entity at each reporting date. The amendments require that financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The ASU eliminates the current framework of recognizing probable incurred losses and instead requires an entity to use its current estimate of all expected credit losses over the contractual life. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. For purchased financial assets with a more-than-insignificant amount of credit deterioration since origination (“PCD assets”) that are measured at amortized cost, an allowance for expected credit losses is recorded as an adjustment to the cost basis of the asset. Subsequent changes in estimated cash flows would be recorded as an adjustment to the allowance and through the statement of income. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security's cost basis. The amendments in this ASU are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. For most debt securities, the transition approach requires a cumulative-effect adjustment to the statement of financial position as of the beginning of the first reporting period the guidance is effective. For other-than-temporarily impaired debt securities and PCD assets, the guidance will be applied prospectively. The Company is currently evaluating the provisions of this ASU to determine the impact the new standard will have on the Company's consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Compensation-Stock Compensation- Improvements to Employee Share-Based Payment Accounting , which involves several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Under the guidance, income tax benefits and deficiencies are to be recognized as income tax expense or benefit in the income statement and the tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity should also recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. Excess tax benefits should be classified along with other income tax cash flows as an operating activity. In regards to forfeitures, the entity may make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. This ASU is effective for fiscal years beginning after December 15, 2016 including interim periods within that reporting period; however, early adoption is permitted. The Company is currently evaluating the guidance to determine its adoption method and does not expect this guidance to have a material impact on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The amendments require lessees to recognize a lease liability, which is a lessee's obligation to make lease payments arising from a lease, and a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. The guidance also simplifies the accounting for sale and leaseback transactions. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is currently evaluating the provisions of this ASU to determine the impact the new standard will have on the Company's consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities , to require all equity investments to be measured at fair value with changes in the fair value recognized through net income (other than those accounted for under equity method of accounting or those that result in consolidation of the investee). The amendments in this ASU also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This ASU is effective for fiscal years beginning after December 15, 2017 including interim periods within that reporting period. The Company does not expect this guidance to have a material impact on its consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement-Period Adjustments, which will require that the acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amount is determined. The acquirer is required to also record, in the same period’s financial statements, the effect on earnings as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. In addition, an entity is required to present separately on the face of the income statement or disclose in the notes to the financial statements the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The amendments in ASU 2015-16 are effective for years beginning after December 15, 2015. Early adoption is permitted for reporting periods for which financial statements have not been issued. The Company does not expect this guidance to have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASU 2015-05, Customer’s Accounting for Fees Paid in Cloud Computing Arrangement . The ASU was issued to clarify a customer's accounting for fees paid in a cloud computing arrangement. The amendments provide guidance to customers in determining whether a cloud computing arrangement includes a software license that should be accounted for as internal-use software. If the arrangement does not contain a software license, it would be accounted for as a service contract. The guidance in this ASU is effective for interim and annual periods beginning after December 15, 2015 and can be adopted either (1) prospectively to all arrangements entered into or materially modified after the effective date or (2) retrospectively. The Company does not expect this guidance to have a material impact on its consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) . The guidance in this update supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition, and most industry-specific guidance throughout the industry topics of the codification. For public companies, this update was to be effective for interim and annual periods beginning after December 15, 2016. However, in August 2015, the FASB issued ASU 2015-14, which delayed the effective date of ASU 2014-09 by one year and permits companies to voluntarily adopt the new standard as of the original effective date. The Company does not expect this guidance to have a material impact on its consolidated financial statements.

Dividends and Share Repurchases

Dividends and Share Repurchases	9 Months Ended
	Jun. 30, 2016
Dividends [Abstract]
Dividends and Share Repurchases	Dividends and Share Repurchases On May 13, 2016 , the Company paid a dividend on common stock of $0.14 per share. This dividend was the 133rd consecutive quarterly cash dividend paid on common stock. Dividends per share were $ 0.14 and $ 0.13 for the quarters ended June 30, 2016 and 2015 , respectively. On July 25, 2016 , the Company declared a dividend on common stock of $0.14 per share, which represents its 134th consecutive quarterly cash dividend. The dividend will be paid on August 19, 2016 to common shareholders of record on August 5, 2016 . For the three months ended June 30, 2016 , the Company repurchased 1,097,397 shares at an average price of $23.33 . For the three months ended June 30, 2015 , the Company repurchased 1,171,662 shares at an average price of $21.93 . As of June 30, 2016 , there are 1,041,309 remaining shares authorized to be repurchased under the current Board approved program.

Loans Receivable

Loans Receivable	9 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Loans Receivable	Loans Receivable The following table is a summary of loans receivable. June 30, 2016 September 30, 2015 (In thousands) (In thousands) Non-Acquired loans Single-family residential $ 5,593,018 52.9 % $ 5,651,845 57.6 % Construction 1,016,305 9.6 200,509 2.0 Construction - custom 409,116 3.9 396,307 4.0 Land - acquisition & development 101,849 1.0 94,208 1.0 Land - consumer lot loans 101,731 1.0 103,989 1.1 Multi-family 1,094,736 10.3 1,125,722 11.6 Commercial real estate 886,957 8.4 986,270 10.0 Commercial & industrial 810,442 7.7 612,836 6.2 HELOC 134,735 1.3 127,646 1.3 Consumer 154,261 1.4 194,655 2.0 Total non-acquired loans 10,303,150 97.5 % 9,493,987 96.8 % Acquired loans 140,369 1.3 166,293 1.6 Credit impaired acquired loans 96,491 0.9 87,081 0.9 Covered loans 32,191 0.3 75,909 0.7 Total gross loans 10,572,201 100.0 % 9,823,270 100.0 % Less: Allowance for loan losses 111,016 106,829 Loans in process 780,721 476,796 Discount on acquired loans 14,775 30,095 Deferred net origination fees 37,113 38,916 Total loan contra accounts 943,625 652,636 Net Loans $ 9,628,576 $ 9,170,634 The following table sets forth information regarding non-accrual loans. June 30, 2016 September 30, 2015 (In thousands) Non-accrual loans: Single-family residential $ 36,707 77.5 % $ 59,074 87.1 % Construction — — 754 1.1 Construction - custom 506 1.1 732 1.1 Land - acquisition & development 427 0.9 — — Land - consumer lot loans 1,105 2.3 1,273 1.9 Multi-family 1,238 2.6 2,558 3.8 Commercial real estate 6,297 13.3 2,176 3.2 Commercial & industrial 521 1.1 — — HELOC 548 1.2 563 0.8 Consumer — — 680 1.0 Total non-accrual loans $ 47,349 100 % $ 67,810 100 % The Company recognized interest income on nonaccrual loans of approximately $4,100,000 in the nine months ended June 30, 2016 . Had these loans performed according to their original contract terms, the Company would have recognized interest income of approximately $1,865,000 for the nine months ended June 30, 2016 . Interest income actually recognized during the nine months ended June 30, 2016 is higher because of loans that were brought current or paid off. The following tables provide details regarding delinquent loans. June 30, 2016 Loans Receivable Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of Loans In Process Current 30 60 90 Total (In thousands) Non-acquired loans Single-Family Residential $ 5,596,644 $ 5,542,000 $ 14,268 $ 6,679 $ 33,697 $ 54,644 0.98 % Construction 442,810 442,810 — — — — — Construction - Custom 213,465 212,690 110 159 506 775 0.36 Land - Acquisition & Development 86,243 85,775 — — 468 468 0.54 Land - Consumer Lot Loans 102,248 100,304 738 101 1,105 1,944 1.90 Multi-Family 1,095,174 1,094,284 956 — — 956 0.09 Commercial Real Estate 886,552 884,644 217 1,443 123 1,783 0.20 Commercial & Industrial 811,502 811,486 — 75 — 75 0.01 HELOC 134,151 133,236 297 70 548 915 0.68 Consumer 153,640 152,874 385 274 107 766 0.50 9,522,429 9,460,103 16,971 8,801 36,554 62,326 0.65 Acquired loans 140,369 137,107 265 529 2,468 3,262 2.32 Credit impaired acquired loans 96,491 91,168 — — 5,323 5,323 5.52 Covered loans 32,191 31,465 417 2 307 726 2.26 Total Loans $ 9,791,480 $ 9,719,843 $ 17,653 $ 9,332 $ 44,652 $ 71,637 0.73 % Delinquency % 99.27% 0.18% 0.10% 0.46% 0.73% September 30, 2015 Loans Receivable Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of Loans In Process Current 30 60 90 Total (In thousands) Non-acquired loans Single-Family Residential $ 5,655,928 $ 5,590,673 $ 17,305 $ 7,757 $ 40,193 $ 65,255 1.15 % Construction 130,121 130,121 — — — — — Construction - Custom 205,692 204,168 791 270 463 1,524 0.74 Land - Acquisition & Development 75,661 74,737 406 — 518 924 1.22 Land - Consumer Lot Loans 104,494 102,045 689 399 1,361 2,449 2.34 Multi-Family 1,068,038 1,065,667 259 454 1,658 2,371 0.22 Commercial Real Estate 893,072 892,180 131 — 761 892 0.10 Commercial & Industrial 617,545 616,602 93 27 823 943 0.15 HELOC 127,648 127,196 174 27 251 452 0.35 Consumer 194,977 194,259 493 170 55 718 0.37 9,073,176 8,997,648 20,341 9,104 46,083 75,528 0.83 Acquired loans 57,682 56,559 356 — 767 1,123 1.95 Credit impaired acquired loans 139,726 138,940 243 4 539 786 0.56 Covered loans 75,890 70,729 272 90 4,799 5,161 6.80 Total Loans $ 9,346,474 $ 9,263,876 $ 21,212 $ 9,198 $ 52,188 $ 82,598 0.88 % Delinquency % 99.12% 0.23% 0.10% 0.56% 0.88% The percentage of total delinquent loans decreased from 0.88% as of September 30, 2015 to 0.73% as of June 30, 2016 and there are no loans greater than 90 days delinquent and still accruing interest as of either date. The following tables provide information related to loans that were restructured in a troubled debt restructuring ("TDR") during the periods presented: Three Months Ended June 30, 2016 2015 Pre-Modification Post-Modification Pre-Modification Post-Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded Contracts Investment Investment Contracts Investment Investment (In thousands) (In thousands) Troubled Debt Restructurings: Single-family residential 7 $ 1,492 $ 1,492 8 $ 1,611 $ 1,611 Land - consumer lot loans — — — 2 203 203 Commercial real estate 2 1,558 1,558 — — — 9 $ 3,050 $ 3,050 10 $ 1,814 $ 1,814 Nine Months Ended June 30, 2016 2015 Pre-Modification Post-Modification Pre-Modification Post-Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded Contracts Investment Investment Contracts Investment Investment (In thousands) (In thousands) Troubled Debt Restructurings: Single-family residential 17 $ 3,322 $ 3,322 57 $ 13,875 $ 13,875 Construction — — — 2 718 718 Construction - custom — — — 2 532 532 Land - consumer lot loans — — — 6 923 923 Commercial real estate 7 2,523 2,523 3 3,175 3,175 Consumer — — — 1 85 85 24 $ 5,845 $ 5,845 71 $ 19,308 $ 19,308 The following tables provide information on payment defaults occurring during the periods presented where the loan had been modified in a TDR within 12 months of the payment default. Three Months Ended June 30, 2016 2015 Number of Recorded Number of Recorded Contracts Investment Contracts Investment (In thousands) (In thousands) TDRs That Subsequently Defaulted: Single-family residential 3 $ 1,570 9 $ 1,594 Construction 1 279 — — Land - consumer lot loans 2 204 2 301 Commercial real estate 1 174 — — 7 $ 2,227 11 $ 1,895 Nine Months Ended June 30, 2016 2015 Number of Recorded Number of Recorded Contracts Investment Contracts Investment (In thousands) (In thousands) TDRs That Subsequently Defaulted: Single-family residential 14 $ 3,108 19 $ 3,329 Construction 1 279 — — Land - consumer lot loans 4 498 7 991 Commercial real estate 2 326 — — 21 $ 4,211 26 $ 4,320 Most loans restructured in TDRs are accruing and performing loans where the borrower has proactively approached the Company about modification due to temporary financial difficulties. As of June 30, 2016 , 96.0% of the Company's $258,135,000 in TDRs were classified as performing. Each request for modification is individually evaluated for merit and likelihood of success. The concession granted in a loan modification is typically a payment reduction through a rate reduction of between 100 to 200 basis points for a specific term, usually six to twenty four months. Interest-only payments may also be approved during the modification period. Principal forgiveness is not an available option for restructured loans. As of June 30, 2016 , single-family residential loans comprised 86.7% of TDRs. The Company reserves for restructured loans within its allowance for loan loss methodology by taking into account the following performance indicators: 1) time since modification, 2) current payment status and 3) geographic area. The following table shows the changes in accretable yield for acquired impaired loans and acquired non-impaired loans (including covered loans). Nine Months Ended June 30, 2016 Year Ended September 30, 2015 Acquired Impaired Acquired Non-impaired Acquired Impaired Acquired Non-impaired Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans (In thousands) (In thousands) Beginning balance $ 72,705 $ 111,300 $ 7,204 $ 187,080 $ 97,125 $ 135,826 $ 14,513 $ 275,862 Additions — — — — — — — — Net reclassification from non-accretable 4,867 — — — 6,307 — 346 — Accretion (17,119 ) 17,119 (2,210 ) 2,210 (30,727 ) 30,727 (7,655 ) 7,655 Transfers to REO — (175 ) — — — (2,975 ) — (150 ) Payments received, net — (31,823 ) — (31,439 ) — (52,278 ) — (96,287 ) Ending Balance $ 60,453 $ 96,421 $ 4,994 $ 157,851 $ 72,705 $ 111,300 $ 7,204 $ 187,080 The excess of cash flows expected to be collected over the initial fair value of acquired impaired loans is referred to as the accretable yield and this amount is accreted into interest income over the estimated life of the acquired loans using the effective interest method. Other adjustments to the accretable yield include changes in the estimated remaining life of the acquired loans, changes in expected cash flows and changes in the respective indices for acquired loans with variable interest rates. Acquired loans are included in non-performing assets and subject to the general loss reserving methodology if the purchase discount is no longer sufficient to cover expected losses. Covered loans were $32,191,000 at June 30, 2016 compared to $75,909,000 as of September 30, 2015 , the decrease being attributable to FDIC loss share coverage on commercial loans from the former Home Valley Bank that expired after September 30, 2015 . The FDIC loss share coverage for single family residential loans will continue for another five years. The remaining portfolio of covered loans is expected to continue to decline over time, absent another FDIC assisted transaction. The following table shows activity for the FDIC indemnification asset: Nine Months Ended June 30, 2016 Year Ended September 30, 2015 (In thousands) Balance at beginning of period $ 16,275 $ 36,860 Additions/Adjustments — (1,795 ) Payments received (1,827 ) (720 ) Amortization (1,385 ) (18,588 ) Accretion 187 518 Balance at end of period $ 13,250 $ 16,275

Allowance for Losses on Loans

Allowance for Losses on Loans	9 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Allowance for Losses on Loans	Allowance for Losses on Loans The following tables summarize the activity in the allowance for loan losses. Three Months Ended June 30, 2016 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 41,828 $ (634 ) $ 162 $ (675 ) $ 40,681 Construction 15,726 — 207 1,729 17,662 Construction - custom 1,022 — 60 (54 ) 1,028 Land - acquisition & development 7,252 (31 ) 2,741 (3,240 ) 6,722 Land - consumer lot loans 2,466 (26 ) 5 59 2,504 Multi-family 6,784 — — 137 6,921 Commercial real estate 7,783 — 454 (94 ) 8,143 Commercial & industrial 23,824 (150 ) 6 716 24,396 HELOC 828 (27 ) — 55 856 Consumer 2,406 (307 ) 437 (433 ) 2,103 $ 109,919 $ (1,175 ) $ 4,072 $ (1,800 ) $ 111,016 Three Months Ended June 30, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 54,762 $ (1,698 ) $ 3,878 $ (4,938 ) $ 52,004 Construction 5,445 — — 488 5,933 Construction - custom 968 — — 17 985 Land - acquisition & development 7,405 — 1 (1,634 ) 5,772 Land - consumer lot loans 3,035 (276 ) 187 53 2,999 Multi-family 4,673 — — 362 5,035 Commercial real estate 6,734 (1,592 ) 230 1,896 7,268 Commercial & industrial 21,146 (2,106 ) 896 1,726 21,662 HELOC 850 (26 ) 1 39 864 Consumer 3,305 (853 ) 1,045 (408 ) 3,089 $ 108,323 $ (6,551 ) $ 6,238 $ (2,399 ) $ 105,611 Nine Months Ended June 30, 2016 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 47,347 $ (2,800 ) $ 2,739 $ (6,605 ) $ 40,681 Construction 6,680 — 357 10,625 17,662 Construction - custom 990 (60 ) 60 38 1,028 Land - acquisition & development 5,781 (31 ) 6,148 (5,176 ) 6,722 Land - consumer lot loans 2,946 (701 ) 5 254 2,504 Multi-family 5,304 — — 1,617 6,921 Commercial real estate 8,960 (32 ) 1,569 (2,354 ) 8,143 Commercial & industrial 24,980 (729 ) 597 (452 ) 24,396 HELOC 902 (54 ) 21 (13 ) 856 Consumer 2,939 (827 ) 1,226 (1,235 ) 2,103 $ 106,829 $ (5,234 ) $ 12,722 $ (3,301 ) $ 111,016 Nine Months Ended June 30, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 62,763 $ (4,801 ) $ 10,553 $ (16,511 ) $ 52,004 Construction 6,742 (388 ) 75 (496 ) 5,933 Construction - custom 1,695 — — (710 ) 985 Land - acquisition & development 5,592 (38 ) 206 12 5,772 Land - consumer lot loans 3,077 (363 ) 221 64 2,999 Multi-family 4,248 — 220 567 5,035 Commercial real estate 7,548 (1,619 ) 711 628 7,268 Commercial & industrial 16,527 (2,461 ) 948 6,648 21,662 HELOC 928 (26 ) 1 (39 ) 864 Consumer 3,227 (1,981 ) 2,394 (551 ) 3,089 Covered loans 2,244 (2,244 ) — $ 114,591 $ (11,677 ) $ 15,329 $ (12,632 ) $ 105,611 The Company recorded a release of allowance for loan losses of $1,650,000 for the three months ended June 30, 2016 , which compares to a release of allowance of $1,932,000 for the three months ended June 30, 2015 . The release of allowance for loan losses for the quarter ended June 30, 2016 was a result of continued improvement in credit quality of the loan portfolio offset by net growth in the loan portfolio. The related improvement in the credit quality of the loan portfolio relates to the factors below. The Company had recoveries, net of charge-offs, of $2,897,000 for the quarter ended June 30, 2016 , compared with net charge-offs of $313,000 for the same quarter one year ago. Non-performing assets were $79,031,000 , or 0.53% , of total assets at June 30, 2016 , compared to $93,329,000 , or 0.64% , and $128,577,000 , or 0.88% , of total assets at March 31, 2016 and September 30, 2015 , respectively. Non-accrual loans were $47,349,000 at June 30, 2016 , compared to $54,559,000 and $67,810,000 at March 31, 2016 and September 30, 2015 , respectively. Delinquencies, as a percent of total loans, were 0.73% at June 30, 2016 , compared to 0.90% and 0.88% at March 31, 2016 and September 30, 2015 , respectively The reserve for unfunded commitments was $3,235,000 as of June 30, 2016 , which is an increase from $3,085,000 at September 30, 2015 . Management believes the allowance for loan losses plus the reserve for unfunded commitments, totaling $114,251,000 , or 1.08% of gross loans, is sufficient to absorb estimated inherent losses. Acquired loans, including covered loans, are not usually classified as non-performing because at acquisition, the carrying value of these loans is recorded at fair value. As of June 30, 2016 , $21,158,000 in acquired loans were subject to the general allowance as the discount related to these balances was no longer sufficient to absorb all of the expected losses. The following tables show loans collectively and individually evaluated for impairment and the related allocation of general and specific reserves. June 30, 2016 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment Allowance Allocation Recorded Investment of Loans (1) Ratio Allowance Allocation Recorded Investment of Loans (1) Ratio (In thousands) (In thousands) Single-family residential $ 39,986 $ 5,547,373 0.7 % $ 693 $ 24,451 2.8 % Construction 17,662 442,437 4.0 — — — Construction - custom 1,027 211,215 0.5 — 1,125 — Land - acquisition & development 6,710 87,099 7.7 13 1,454 0.9 Land - consumer lot loans 2,504 90,983 2.8 — 1,238 — Multi-family 6,911 1,091,709 0.6 11 1,513 0.7 Commercial real estate 7,963 848,187 0.9 180 21,313 0.8 Commercial & industrial 24,397 832,429 2.9 — — — HELOC 856 132,869 0.6 — 468 — Consumer 2,103 154,107 1.4 — — — $ 110,119 $ 9,438,408 1.2 % $ 897 $ 51,562 1.7 % (1) Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans September 30, 2015 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment Allowance Allocation Recorded Investment of Loans (1) Ratio Allowance Allocation Recorded Investment of Loans (1) Ratio (In thousands) (In thousands) Single-family residential $ 47,073 $ 5,595,752 0.8 % $ 275 $ 51,718 0.5 % Construction 6,680 124,679 5.4 — 5,441 — Construction - custom 990 205,692 0.5 — — — Land - acquisition & development 5,781 72,602 8.0 — 2,198 — Land - consumer lot loans 2,946 93,103 3.2 — 10,824 — Multi-family 5,304 1,062,194 0.5 — 5,348 — Commercial real estate 8,960 844,691 1.1 — 8,826 — Commercial & industrial 24,980 643,577 3.9 — — — HELOC 902 126,594 0.7 — 1,072 — Consumer 2,938 194,569 1.5 — 86 — $ 106,554 $ 8,963,453 1.2 % $ 275 $ 85,513 0.3 % (1) Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans As of June 30, 2016 , $110,119,000 of the allowance was calculated under the formulas contained in our general allowance methodology and the remaining $897,000 was specific reserves on loans deemed to be individually impaired. As of September 30, 2015 , $106,554,000 of the allowance was calculated under the formulas contained in our general allowance methodology and the remaining $275,000 was specific reserves on loans deemed to be individually impaired. The Company has an asset quality review function that analyzes its loan portfolios and reports the results of the review to the Board of Directors on a quarterly basis. The single-family residential, HELOC and consumer portfolios are evaluated based on their performance as a pool of loans, since no single loan is individually significant or judged by its risk rating, size or potential risk of loss. The construction, land, multi-family, commercial real estate and commercial and industrial loans are risk rated on a loan by loan basis to determine the relative risk inherent in specific borrowers or loans. Based on that risk rating, the loans are assigned a grade and classified as follows: • Pass – the credit does not meet one of the definitions below. • Special mention – A special mention credit is considered to be currently protected from loss but is potentially weak. No loss of principal or interest is foreseen; however, proper supervision and Management attention is required to deter further deterioration in the credit. Assets in this category constitute some undue and unwarranted credit risk but not to the point of justifying a risk rating of substandard. The credit risk may be relatively minor yet constitutes an unwarranted risk in light of the circumstances surrounding a specific asset. • Substandard – A substandard credit is an unacceptable credit. Additionally, repayment in the normal course is in jeopardy due to the existence of one or more well defined weaknesses. In these situations, loss of principal is likely if the weakness is not corrected. A substandard asset is inadequately protected by the current sound worth and paying capacity of the borrower or of the collateral pledged, if any. Assets so classified will have a well defined weakness or weaknesses that jeopardize the collection or liquidation of the debt. Loss potential, while existing in the aggregate amount of substandard assets, does not have to exist in individual assets risk rated substandard. • Doubtful – A credit classified doubtful has all the weaknesses inherent in one classified substandard with the added characteristic that the weakness makes collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The probability of loss is high, but because of certain important and reasonably specific pending factors that may work to the advantage and strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens on additional collateral, and refinancing plans. • Loss – Credits classified loss are considered uncollectible and of such little value that their continuance as a bankable asset is not warranted. This classification does not mean that the asset has absolutely no recovery or salvage value, but rather it is not practical or desirable to defer writing off this asset even though partial recovery may be affected in the future. Losses should be taken in the period in which they are identified as uncollectible. Partial charge-off versus full charge-off may be taken if the collateral offers some identifiable protection. The following tables provide information on loans based on risk rating categories as defined above. June 30, 2016 Internally Assigned Grade Pass Special mention Substandard Doubtful Loss Total Gross Loans (In thousands) Non-acquired loans Single-family residential $ 5,533,837 $ — $ 59,181 $ — $ — $ 5,593,018 Construction 1,012,203 — 4,102 — — 1,016,305 Construction - custom 408,538 — 578 — — 409,116 Land - acquisition & development 94,830 — 7,019 — — 101,849 Land - consumer lot loans 100,173 — 1,558 — — 101,731 Multi-family 1,087,363 3,252 4,121 — — 1,094,736 Commercial real estate 861,771 11,345 13,841 — — 886,957 Commercial & industrial 755,361 6,532 48,549 — — 810,442 HELOC 133,939 — 796 — — 134,735 Consumer 154,148 — 113 — — 154,261 10,142,163 21,129 139,858 — — 10,303,150 Non-impaired acquired loans 132,710 47 7,612 — — 140,369 Credit-impaired acquired loans 65,106 — 31,381 — 4 96,491 Covered loans 31,849 — 342 — — 32,191 Total gross loans $ 10,371,828 $ 21,176 $ 179,193 $ — $ 4 $ 10,572,201 Total grade as a % of total gross loans 98.1 % 0.2 % 1.7 % — % — % September 30, 2015 Internally Assigned Grade Pass Special mention Substandard Doubtful Loss Total Gross Loans (In thousands) Non-acquired loans Single-family residential $ 5,558,700 $ — $ 93,145 $ — $ — $ 5,651,845 Construction 197,935 — 2,574 — — 200,509 Construction - custom 396,307 — — — — 396,307 Land - acquisition & development 89,656 — 4,552 — — 94,208 Land - consumer lot loans 103,569 — 420 — — 103,989 Multi-family 1,118,673 865 6,184 — — 1,125,722 Commercial real estate 971,510 4,360 10,400 — — 986,270 Commercial & industrial 575,034 1,496 36,306 — — 612,836 HELOC 127,398 — 248 — — 127,646 Consumer 194,451 — 204 — — 194,655 9,333,233 6,721 154,033 — — 9,493,987 Non-impaired acquired loans 149,891 — 16,402 — — 166,293 Credit-impaired acquired loans 61,019 — 26,062 — — 87,081 Covered loans 61,776 — 14,133 — — 75,909 Total gross loans $ 9,605,919 $ 6,721 $ 210,630 $ — $ — $ 9,823,270 Total grade as a % of total gross loans 97.8 % 0.1 % 2.1 % — % — % The following tables provide information on loans (excluding acquired and covered loans) based on borrower payment activity. June 30, 2016 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) Single-family residential $ 5,556,312 99.3 % $ 36,707 0.7 % Construction 1,016,305 100.0 — — Construction - custom 408,610 99.9 506 0.1 Land - acquisition & development 101,422 99.6 427 0.4 Land - consumer lot loans 100,626 98.9 1,105 1.1 Multi-family 1,093,495 99.9 1,238 0.1 Commercial real estate 880,661 99.3 6,297 0.7 Commercial & industrial 809,921 99.9 521 0.1 HELOC 134,188 99.6 548 0.4 Consumer 154,261 100.0 — — $ 10,255,801 99.5 % $ 47,349 0.5 % September 30, 2015 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) Single-family residential $ 5,592,771 99.0 % $ 59,074 1.0 % Construction 199,755 99.6 754 0.4 Construction - custom 395,575 99.8 732 0.2 Land - acquisition & development 94,208 100.0 — — Land - consumer lot loans 102,716 98.8 1,273 1.2 Multi-family 1,123,165 99.8 2,558 0.2 Commercial real estate 984,093 99.8 2,176 0.2 Commercial & industrial 612,836 100.0 — — HELOC 127,083 99.6 563 0.4 Consumer 193,975 99.7 680 0.3 $ 9,426,177 99.3 % $ 67,810 0.7 % The following tables provide information on impaired loan balances and the related allowances by loan types. June 30, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 9,602 $ 11,287 $ — $ 8,491 Construction - custom 578 578 — 289 Land - acquisition & development 164 8,393 — 164 Land - consumer lot loans 650 747 — 599 Multi-family 428 4,177 — 736 Commercial real estate 5,673 6,588 — 5,697 Commercial & industrial 906 7,627 — 544 HELOC 368 483 — 354 Consumer 33 483 — 17 18,402 40,363 — 16,891 Impaired loans with an allowance recorded: Single-family residential 223,533 227,633 4,202 224,274 Land - acquisition & development 1,454 2,656 8 1,543 Land - consumer lot loans 9,672 10,734 5 9,748 Multi-family 1,513 1,513 11 1,518 Commercial real estate 20,490 24,316 180 19,816 HELOC 1,379 1,394 — 1,388 Consumer 95 285 — 95 258,136 268,531 4,406 (1) 258,382 Total impaired loans: Single-family residential 233,135 238,920 4,202 232,765 Construction - custom 578 578 — 289 Land - acquisition & development 1,618 11,049 8 1,707 Land - consumer lot loans 10,322 11,481 5 10,347 Multi-family 1,941 5,690 11 2,254 Commercial real estate 26,163 30,904 180 25,513 Commercial & industrial 906 7,627 — 544 HELOC 1,747 1,877 — 1,742 Consumer 128 768 — 112 $ 276,538 $ 308,894 $ 4,406 (1) $ 275,273 (1) Includes $897,000 of specific reserves and $3,509,000 included in the general reserves. September 30, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 17,250 $ 19,644 $ — $ 14,069 Construction 453 2,151 — 471 Construction - custom 554 554 — 182 Land - acquisition & development 2,570 9,426 — 926 Land - consumer lot loans 727 814 — 544 Multi-family 3,770 7,054 — 1,545 Commercial real estate 9,427 15,620 — 8,130 Commercial & industrial 2,955 13,066 — 2,681 HELOC 683 1,532 — 536 Consumer 477 703 — 390 38,866 70,564 — 29,474 Impaired loans with an allowance recorded: Single-family residential 259,461 263,268 6,678 260,028 Construction 4,988 5,778 — 5,432 Land - acquisition & development 2,486 3,426 — 3,478 Land - consumer lot loans 11,289 11,554 — 11,324 Multi-family 3,823 3,823 — 3,732 Commercial real estate 19,124 21,078 — 18,886 HELOC 1,443 1,443 — 1,359 Consumer 99 289 — 102 302,713 310,659 6,678 (1) 304,341 Total impaired loans: Single-family residential 276,711 282,912 6,678 274,097 Construction 5,441 7,929 — 5,903 Construction - custom 554 554 — 182 Land - acquisition & development 5,056 12,852 — 4,404 Land - consumer lot loans 12,016 12,368 — 11,868 Multi-family 7,593 10,877 — 5,277 Commercial real estate 28,551 36,698 — 27,016 Commercial & industrial 2,955 13,066 — 2,681 HELOC 2,126 2,975 — 1,895 Consumer 576 992 — 492 $ 341,579 $ 381,223 $ 6,678 (1) $ 333,815 (1) Includes $275,000 of specific reserves and $6,403,000 included in the general reserves.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements ASC 825 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 825 also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value: Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active exchange markets that the entity has the ability to access as of the measurement date. Level 2: Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active and other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability. We have established and documented the Company's process for determining the fair values of the Company's assets and liabilities, where applicable. Fair value is based on quoted market prices, when available, for identical or similar assets or liabilities. In the absence of quoted market prices, fair value is determined using valuation models or third-party appraisals. The following is a description of the valuation methodologies used to measure and report the fair value of financial assets and liabilities on a recurring or nonrecurring basis: Measured on a Recurring Basis Securities Securities available for sale are recorded at fair value on a recurring basis. The fair value of debt securities are priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party, and under GAAP are considered a Level 2 input method. Securities that are traded on active exchanges, including the Company's equity securities, are measured using the closing price in an active market and are considered a Level 1 input method. The Bank offers interest rate swaps to its variable rate borrowers who want to manage their interest rate risk. At the same time, the Bank enters into the opposite trade with a counter party to offset its interest rate risk. The Bank has also entered into a commercial loan hedge as well as long term borrowing hedges using interest rate swaps. The fair value of these interest rate swaps are estimated by a third party pricing service using a discounted cash flow technique. These are considered a Level 2 input method. The following tables present the balance of assets and liabilities measured at fair value on a recurring basis. June 30, 2016 Level 1 Level 2 Level 3 Total (In thousands) Financial Assets Available-for-sale securities: Equity securities $ 101,885 $ — $ — $ 101,885 Obligations of U.S. government — 249,053 — 249,053 Obligations of states and political subdivisions — 27,488 — 27,488 Corporate debt securities — 460,399 — 460,399 Mortgage-backed securities Agency pass-through certificates — 1,046,506 — 1,046,506 Commercial MBS — 84,538 — 84,538 Total available-for-sale securities 101,885 1,867,984 — 1,969,869 Interest rate contracts — 22,085 — 22,085 Total financial assets $ 101,885 $ 1,890,069 $ — $ 1,991,954 Financial Liabilities Interest rate contracts $ — $ 22,085 $ — $ 22,085 Commercial loan hedge — 3,394 — 3,394 Long term borrowing hedge — 35,533 — 35,533 Total financial liabilities $ — $ 61,012 $ — $ 61,012 There were no transfers between, into and/or out of Levels 1, 2 or 3 during the nine months ended June 30, 2016 . September 30, 2015 Level 1 Level 2 Level 3 Total (In thousands) Financial Assets Available-for-sale securities: Equity securities $ 101,952 $ — $ — $ 101,952 Obligations of U.S. government — 482,464 — 482,464 Obligations of states and political subdivisions — 27,123 — 27,123 Corporate debt securities — 505,800 — 505,800 Mortgage-backed securities Agency pass-through certificates — 1,160,518 — 1,160,518 Commercial MBS — 102,706 — 102,706 Total available-for-sale securities 101,952 2,278,611 — 2,380,563 Interest rate contracts — 11,879 — 11,879 Total financial assets $ 101,952 $ 2,290,490 $ — $ 2,392,442 Financial Liabilities Interest rate contracts $ — $ 11,879 $ — $ 11,879 Commercial loan hedge — 966 — 966 Long term borrowing hedge — 14,555 — 14,555 Total financial liabilities $ — $ 27,400 $ — $ 27,400 There were no transfers between, into and/or out of Levels 1, 2 or 3 during the fiscal year ended September 30, 2015 . Measured on a Nonrecurring Basis Impaired Loans & Real Estate Owned Real estate owned ("REO") consists principally of properties acquired through foreclosure. From time to time, and on a nonrecurring basis, adjustments using fair value measurements are recorded to reflect increases or decreases based on the current appraisal or estimated value of the collateral, but only up to the fair value of the real estate owned as of the initial transfer date less selling costs. When management determines that the fair value of the collateral or the real estate owned requires additional adjustments, either as a result of an updated appraised value or when there is no observable market price, the Company classifies the impaired loan or real estate owned as Level 3. Level 3 assets recorded at fair value on a nonrecurring basis at June 30, 2016 included loans for which a specific reserve allowance was established or a partial charge-off was recorded based on the fair value of collateral, as well as real estate owned where the fair value of the property was less than the cost basis. The following tables present the aggregated balance of assets that were measured at fair value on a nonrecurring basis at June 30, 2016 and June 30, 2015 , and the total gains (losses) resulting from those fair value adjustments for the nine months ended June 30, 2016 and June 30, 2015 . The estimated fair value measurements are shown gross of estimated selling costs. June 30, 2016 Three Months Ended June 30, 2016 Nine Months Ended June 30, 2016 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 15,724 $ 15,724 $ (692 ) $ (3,762 ) Real estate owned (2) — — 19,853 19,853 (614 ) (2,944 ) Balance at end of period $ — $ — $ 35,577 $ 35,577 $ (1,306 ) $ (6,706 ) (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on REO. June 30, 2015 Three Months Ended June 30, 2015 Nine Months Ended June 30, 2015 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 6,735 $ 6,735 $ (3,621 ) $ (4,201 ) Real estate owned (2) — — 73,781 73,781 (2,366 ) 8,403 Balance at end of period $ — $ — $ 80,516 $ 80,516 $ (5,987 ) $ 4,202 (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on REO. Impaired loans - The Company adjusts the carrying amount of impaired loans when there is evidence of probable loss and the expected fair value of the loan is less than its contractual amount. The amount of the impairment may be determined based on the estimated present value of future cash flows or the fair value of the underlying collateral. Impaired loans with a specific reserve allowance based on cash flow analysis or the value of the underlying collateral are classified as Level 3 assets. The evaluations for impairment are prepared by the Problem Loan Review Committee, which is chaired by the Chief Credit Officer and includes the Loan Review manager and Special Credits manager, as well as senior credit officers, division managers and group executives, as applicable. These evaluations are performed in conjunction with the quarterly allowance for loan loss process. Applicable loans that were included in the previous quarter's review are reevaluated and if their values are materially different from the prior quarter evaluation, the underlying information (loan balance and collateral value) are compared. Material differences are evaluated for reasonableness and discussions are held between the relationship manager and their division manager to understand the difference and determine if any adjustment is necessary. The inputs are developed and substantiated on a quarterly basis, based on current borrower developments, market conditions and collateral values. The following methods are used to value impaired loans: • The fair value of the collateral, which may take the form of real estate or personal property, is based on internal estimates, field observations, assessments provided by third-party appraisers and other valuation models. The Company performs or reaffirms valuations of collateral-dependent impaired loans at least annually. Adjustments are made if management believes that more recent information is available and relevant with respect to the fair value of the collateral. • The present value of the expected future cash flows of the loans is used for measurement of non collateral-dependent loans to test for impairment. The Company calculates the amount and timing of the future cash flows, the effective interest rate to be used to discount the cash flows and the basis for determination of the cash flows, including consideration of current economic and environmental factors, as well as other information relating to current or previous conditions. Real estate owned - When a loan is reclassified from loan status to real estate owned due to the Company taking possession of the collateral, a Special Credits officer, along with the Special Credits manager, obtains a valuation, which may include appraisals or third-party price options, which is used to establish the fair value of the underlying collateral. The determined fair value, less selling costs, becomes the carrying value of the REO asset. The fair value of REO assets is re-evaluated quarterly and the REO asset is adjusted to reflect the fair value as necessary. After foreclosure, the valuations are updated periodically and current market conditions may require the assets to be written down further or up to the cost basis established on the date of transfer. The carrying balance of REO assets are also written down once a bona fide offer is contractually accepted, through execution of a Purchase and Sale Agreement, where the accepted price is lower than the cost established on the transfer date. Fair Values of Financial Instruments U. S. GAAP requires disclosure of fair value information about financial instruments, whether or not recognized on the statement of financial condition, for which it is practicable to estimate those values. Certain financial instruments and all non-financial instruments are excluded from the disclosure requirements. Accordingly, the aggregate fair value estimates presented do not reflect the underlying fair value of the Company. Although management is not aware of any factors that would materially affect the estimated fair value amounts presented below, such amounts have not been comprehensively revalued for purposes of these financial statements since the dates shown, and therefore, estimates of fair value subsequent to those dates may differ significantly from the amounts presented below. June 30, 2016 September 30, 2015 Level in Fair Value Hierarchy Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value (In thousands) Financial assets Cash and cash equivalents 1 $ 530,055 $ 530,055 $ 284,049 $ 284,049 Available-for-sale securities Equity securities 1 101,885 101,885 101,952 101,952 Obligations of U.S. government 2 249,053 249,053 482,464 482,464 Obligations of states and political subdivisions 2 27,488 27,488 27,123 27,123 Corporate debt securities 2 460,399 460,399 505,800 505,800 Mortgage-backed securities Agency pass-through certificates 2 1,046,506 1,046,506 1,160,518 1,160,518 Commercial MBS 2 84,538 84,538 102,706 102,706 Total available-for-sale securities 1,969,869 1,969,869 2,380,563 2,380,563 Held-to-maturity securities 2 Mortgage-backed securities Agency pass-through certificates 2 1,492,480 1,512,666 1,643,216 1,637,420 Total held-to-maturity securities 1,492,480 1,512,666 1,643,216 1,637,420 Loans receivable 3 9,628,576 10,206,509 9,170,634 9,667,750 FDIC indemnification asset 3 13,250 12,633 16,275 15,522 FHLB and FRB stock 2 117,205 117,205 107,198 107,198 Other assets - interest rate contracts 2 22,085 22,085 11,879 11,879 Financial liabilities Customer accounts 2 10,578,916 10,182,610 10,631,703 10,004,290 FHLB advances 2 2,080,000 2,211,686 1,830,000 1,938,384 Other liabilities - interest rate contracts 2 22,085 22,085 11,879 11,879 Other liabilities - commercial loan hedge 2 3,394 3,394 966 966 Other liabilities - long term borrowing hedge 2 35,533 35,533 14,555 14,555 The following methods and assumptions were used to estimate the fair value of financial instruments: Cash and cash equivalents – The carrying amount of these items is a reasonable estimate of their fair value. Available-for-sale securities and held-to-maturity securities – Securities at fair value are primarily priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party, and are considered a Level 2 input method. Equity securities which are exchange traded are considered a Level 1 input method. Loans receivable and covered loans – For certain homogeneous categories of loans, such as fixed- and variable-rate residential mortgages, fair value is estimated for securities backed by similar loans, adjusted for differences in loan characteristics, using the same methodology described above for AFS and HTM securities. The fair value of other loan types is estimated by discounting the future cash flows and estimated prepayments using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining term. Some loan types were valued at carrying value because of their floating rate or expected maturity characteristics. Net deferred loan fees are not included in the fair value calculation but are included in the carrying amount. FDIC indemnification asset – The fair value of the indemnification asset is estimated by discounting the expected future cash flows using the current rates. FHLB and FRB stock – The fair value is based upon the par value of the stock which equates to its carrying value. Customer accounts – The fair value of demand deposits, savings accounts, and money market accounts is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated by discounting the estimated future cash flows using the rates currently offered for deposits with similar remaining maturities. FHLB advances – The fair value of FHLB advances and other borrowings is estimated by discounting the estimated future cash flows using rates currently available to the Company for debt with similar remaining maturities. Interest Rate Contracts – The bank offers interest rate swaps to its variable rate borrowers who want to manage their interest rate risk. At the same time, the bank enters into the opposite trade with a counterparty to offset its interest rate risk. The fair value of these interest rate swaps are estimated by a third party pricing service using a discounted cash flow technique. Commercial Loan Hedge – The fair value of the interest rate swap is estimated by a third party pricing service using a discounted cash flow technique. Long Term Borrowing Hedges – The fair value of the interest rate swaps are estimated by a third party pricing service using a discounted cash flow technique. The following tables provide a reconciliation of amortized cost to fair value of available-for-sale and held-to-maturity securities. June 30, 2016 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due Within 1 year $ 25,980 $ — $ (65 ) $ 25,915 0.73 % 1 to 5 years $ 13,268 $ 1,273 $ (23 ) $ 14,518 7.49 % 5 to 10 years 49,174 — (1,526 ) 47,648 1.06 Over 10 years 165,032 — (4,060 ) 160,972 1.14 Equity Securities Within 1 year 500 22 — 522 1.80 1 to 5 years 99,922 1,441 — 101,363 1.90 Corporate bonds due Within 1 year 250,000 263 — 250,263 1.07 1 to 5 years 71,540 148 (106 ) 71,582 1.97 5 to 10 years 89,954 518 (2,793 ) 87,679 2.02 Over 10 years 50,000 875 — 50,875 3.00 Municipal bonds due 1 to 5 years 2,307 18 — 2,325 1.23 5 to 10 years 1,327 65 — 1,392 2.05 Over 10 years 20,367 3,404 — 23,771 6.45 Mortgage-backed securities Agency pass-through certificates 1,033,736 16,277 (3,507 ) 1,046,506 2.58 Commercial MBS 86,057 — (1,519 ) 84,538 1.79 1,959,164 24,304 (13,599 ) 1,969,869 2.17 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,492,480 20,764 (578 ) 1,512,666 3.18 $ 3,451,644 $ 45,068 $ (14,177 ) $ 3,482,535 2.60 % September 30, 2015 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due 1 to 5 years $ 105,065 $ 1,923 $ (274 ) $ 106,714 1.74 % 5 to 10 years 119,071 35 (1,247 ) 117,859 1.54 Over 10 years 262,832 — (4,941 ) 257,891 1.23 Equity Securities Within 1 year 500 17 — 517 1.80 1 to 5 years 99,922 1,513 — 101,435 1.90 Corporate bonds due Within 1 year 24,787 191 — 24,978 0.53 1 to 5 years 311,435 1,190 (58 ) 312,567 0.88 5 to 10 years 100,000 876 (3,524 ) 97,352 1.47 Over 10 years 69,950 953 — 70,903 3.00 Municipal bonds due 1 to 5 years 2,285 8 — 2,293 1.23 5 to 10 years 1,303 7 — 1,310 2.05 Over 10 years 20,382 3,138 — 23,520 6.45 Mortgage-backed securities Agency pass-through certificates 1,144,787 18,222 (2,491 ) 1,160,518 2.48 Commercial MBS 103,131 85 (510 ) 102,706 1.51 2,365,450 28,158 (13,045 ) 2,380,563 1.97 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,643,216 10,516 (16,312 ) 1,637,420 3.19 $ 4,008,666 $ 38,674 $ (29,357 ) $ 4,017,983 2.46 % There were no available-for-sale securities sold during the three or nine months ended June 30, 2016 . During the three and nine months ended June 30, 2015 , there were $ 235,110,000 of available-for-sale securities sold for a gain of $9,639,000 . Substantially all of the agency mortgage-backed securities have contractual due dates that exceed 10 years . The following tables show the unrealized gross losses and fair value of securities as of June 30, 2016 and September 30, 2015 , by length of time that individual securities in each category have been in a continuous loss position. The decline in fair value is attributable to changes in interest rates. Because the Company does not intend to sell these securities and does not consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other than temporarily impaired. June 30, 2016 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate bonds due $ (512 ) $ 19,442 $ (2,387 ) $ 57,613 $ (2,899 ) $ 77,055 U.S. government and agency securities due (3,199 ) 122,397 (2,475 ) 116,082 (5,674 ) 238,479 Agency pass-through certificates (1,911 ) 371,804 (3,693 ) 385,416 (5,604 ) 757,220 $ (5,622 ) $ 513,643 $ (8,555 ) $ 559,111 $ (14,177 ) $ 1,072,754 September 30, 2015 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate bonds due $ (183 ) $ 72,862 $ (3,399 ) $ 46,601 $ (3,582 ) $ 119,463 U.S. government and agency securities due (5,010 ) 336,243 (1,452 ) 57,344 (6,462 ) 393,587 Agency pass-through certificates (1,036 ) 169,541 (18,277 ) 1,193,463 (19,313 ) 1,363,004 $ (6,229 ) $ 578,646 $ (23,128 ) $ 1,297,408 $ (29,357 ) $ 1,876,054

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	Derivatives and Hedging Activities The Bank periodically enters into certain interest rate swap agreements in order to provide commercial loan customers the ability to convert from variable to fixed interest rate payments, while the Bank retains a variable rate loan. Under these agreements, the Bank enters into a variable rate loan agreement and a swap agreement with the client. The swap agreement effectively converts the client’s variable rate loan into a fixed rate. The Bank enters into a corresponding swap agreement with a third party in order to offset its exposure on the variable and fixed components of the client's swap agreement. The Bank had $ 557,930,000 and $439,416,000 notional in interest rate swaps to hedge this exposure as of June 30, 2016 and September 30, 2015 , respectively. The interest rate swaps are derivatives under FASB ASC 815, Derivatives and Hedging, with changes in fair value recorded in earnings. There was no net impact to the statement of operations for the nine months ended June 30, 2016 as the changes in value for the asset and liability side of the swaps offset each other. The Bank has also entered into interest rate swaps, some of which are forward-starting, to convert certain existing and future short-term borrowings to fixed rate payments. The primary purpose of these hedges is to mitigate the risk of rising interest rates, specifically LIBOR rates, which are a benchmark for the short term borrowings. The hedging program qualifies as a cash flow hedge under ASC 815, which provides for offsetting of the recognition of gains and losses of the interest rate swaps and the hedged items. The hedged item is the LIBOR portion of the series of existing or future short-term fixed rate borrowings over the term of the interest rate swap. The change in the fair value of the interest rate swaps is recorded in other comprehensive income. The Bank had $700,000,000 and $400,000,000 notional in interest rate swaps to hedge existing and anticipated future borrowings as of June 30, 2016 and September 30, 2015 , respectively. The unrealized loss, gross of the related tax benefit, on these interest rate swaps as of June 30, 2016 was $35,533,000 . The Bank has also entered into an interest rate swap to hedge the interest rate risk of an individual fixed rate commercial loan and this relationship qualifies as a fair value hedge under ASC 815, which provides for offsetting of the recognition of gains and losses of the interest rate swap and the hedged item. The Bank hedges this loan using an interest rate swap with a notional amount of $54,155,000 and $54,815,000 as of June 30, 2016 and September 30, 2015 , respectively The following table presents the fair value and balance sheet classification of derivatives at June 30, 2016 and September 30, 2015 : Asset Derivatives Liability Derivatives June 30, 2016 September 30, 2015 June 30, 2016 September 30, 2015 Balance Sheet Balance Sheet Balance Sheet Balance Sheet Location Fair Value Location Fair Value Location Fair Value Location Fair Value (In thousands) Interest rate contracts Other assets $ 22,085 Other assets $ 11,879 Other liabilities $ 22,085 Other liabilities $ 11,879 Commercial loan hedge Other assets — Other assets — Other liabilities 3,394 Other liabilities 966 Long term borrowing hedge Other assets — Other assets — Other liabilities 35,533 Other liabilities 14,555 $ 22,085 $ 11,879 $ 61,012 $ 27,400

Summary of Significant Accoun15

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Off-Balance-Sheet Credit Exposures	The Company estimates losses on off-balance-sheet credit exposures by allocating a loss percentage derived from historical loss factors for each asset class.
New Accounting Pronouncements	In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses . The amendments in this ASU were issued to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments that are not accounted for at fair value through net income, including loans held for investment, held-to- maturity debt securities, trade and other receivables, net investments in leases and other commitments to extend credit held by a reporting entity at each reporting date. The amendments require that financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The ASU eliminates the current framework of recognizing probable incurred losses and instead requires an entity to use its current estimate of all expected credit losses over the contractual life. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. For purchased financial assets with a more-than-insignificant amount of credit deterioration since origination (“PCD assets”) that are measured at amortized cost, an allowance for expected credit losses is recorded as an adjustment to the cost basis of the asset. Subsequent changes in estimated cash flows would be recorded as an adjustment to the allowance and through the statement of income. Credit losses relating to available-for-sale debt securities will be recorded through an allowance for credit losses rather than as a direct write-down to the security's cost basis. The amendments in this ASU are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. For most debt securities, the transition approach requires a cumulative-effect adjustment to the statement of financial position as of the beginning of the first reporting period the guidance is effective. For other-than-temporarily impaired debt securities and PCD assets, the guidance will be applied prospectively. The Company is currently evaluating the provisions of this ASU to determine the impact the new standard will have on the Company's consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Compensation-Stock Compensation- Improvements to Employee Share-Based Payment Accounting , which involves several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Under the guidance, income tax benefits and deficiencies are to be recognized as income tax expense or benefit in the income statement and the tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity should also recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. Excess tax benefits should be classified along with other income tax cash flows as an operating activity. In regards to forfeitures, the entity may make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. This ASU is effective for fiscal years beginning after December 15, 2016 including interim periods within that reporting period; however, early adoption is permitted. The Company is currently evaluating the guidance to determine its adoption method and does not expect this guidance to have a material impact on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) . The amendments require lessees to recognize a lease liability, which is a lessee's obligation to make lease payments arising from a lease, and a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. The guidance also simplifies the accounting for sale and leaseback transactions. The amendments are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is currently evaluating the provisions of this ASU to determine the impact the new standard will have on the Company's consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities , to require all equity investments to be measured at fair value with changes in the fair value recognized through net income (other than those accounted for under equity method of accounting or those that result in consolidation of the investee). The amendments in this ASU also require an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. This ASU is effective for fiscal years beginning after December 15, 2017 including interim periods within that reporting period. The Company does not expect this guidance to have a material impact on its consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement-Period Adjustments, which will require that the acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amount is determined. The acquirer is required to also record, in the same period’s financial statements, the effect on earnings as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. In addition, an entity is required to present separately on the face of the income statement or disclose in the notes to the financial statements the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The amendments in ASU 2015-16 are effective for years beginning after December 15, 2015. Early adoption is permitted for reporting periods for which financial statements have not been issued. The Company does not expect this guidance to have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASU 2015-05, Customer’s Accounting for Fees Paid in Cloud Computing Arrangement . The ASU was issued to clarify a customer's accounting for fees paid in a cloud computing arrangement. The amendments provide guidance to customers in determining whether a cloud computing arrangement includes a software license that should be accounted for as internal-use software. If the arrangement does not contain a software license, it would be accounted for as a service contract. The guidance in this ASU is effective for interim and annual periods beginning after December 15, 2015 and can be adopted either (1) prospectively to all arrangements entered into or materially modified after the effective date or (2) retrospectively. The Company does not expect this guidance to have a material impact on its consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) . The guidance in this update supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition, and most industry-specific guidance throughout the industry topics of the codification. For public companies, this update was to be effective for interim and annual periods beginning after December 15, 2016. However, in August 2015, the FASB issued ASU 2015-14, which delayed the effective date of ASU 2014-09 by one year and permits companies to voluntarily adopt the new standard as of the original effective date. The Company does not expect this guidance to have a material impact on its consolidated financial statements.

Loans Receivable (Tables)

Loans Receivable (Tables)	9 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Schedule of Loans Receivable	The following table is a summary of loans receivable. June 30, 2016 September 30, 2015 (In thousands) (In thousands) Non-Acquired loans Single-family residential $ 5,593,018 52.9 % $ 5,651,845 57.6 % Construction 1,016,305 9.6 200,509 2.0 Construction - custom 409,116 3.9 396,307 4.0 Land - acquisition & development 101,849 1.0 94,208 1.0 Land - consumer lot loans 101,731 1.0 103,989 1.1 Multi-family 1,094,736 10.3 1,125,722 11.6 Commercial real estate 886,957 8.4 986,270 10.0 Commercial & industrial 810,442 7.7 612,836 6.2 HELOC 134,735 1.3 127,646 1.3 Consumer 154,261 1.4 194,655 2.0 Total non-acquired loans 10,303,150 97.5 % 9,493,987 96.8 % Acquired loans 140,369 1.3 166,293 1.6 Credit impaired acquired loans 96,491 0.9 87,081 0.9 Covered loans 32,191 0.3 75,909 0.7 Total gross loans 10,572,201 100.0 % 9,823,270 100.0 % Less: Allowance for loan losses 111,016 106,829 Loans in process 780,721 476,796 Discount on acquired loans 14,775 30,095 Deferred net origination fees 37,113 38,916 Total loan contra accounts 943,625 652,636 Net Loans $ 9,628,576 $ 9,170,634
Summary of Information Regarding Non-Accrual Loans	The following table sets forth information regarding non-accrual loans. June 30, 2016 September 30, 2015 (In thousands) Non-accrual loans: Single-family residential $ 36,707 77.5 % $ 59,074 87.1 % Construction — — 754 1.1 Construction - custom 506 1.1 732 1.1 Land - acquisition & development 427 0.9 — — Land - consumer lot loans 1,105 2.3 1,273 1.9 Multi-family 1,238 2.6 2,558 3.8 Commercial real estate 6,297 13.3 2,176 3.2 Commercial & industrial 521 1.1 — — HELOC 548 1.2 563 0.8 Consumer — — 680 1.0 Total non-accrual loans $ 47,349 100 % $ 67,810 100 %
Analysis of Age of Loans in Past Due Status	The following tables provide details regarding delinquent loans. June 30, 2016 Loans Receivable Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of Loans In Process Current 30 60 90 Total (In thousands) Non-acquired loans Single-Family Residential $ 5,596,644 $ 5,542,000 $ 14,268 $ 6,679 $ 33,697 $ 54,644 0.98 % Construction 442,810 442,810 — — — — — Construction - Custom 213,465 212,690 110 159 506 775 0.36 Land - Acquisition & Development 86,243 85,775 — — 468 468 0.54 Land - Consumer Lot Loans 102,248 100,304 738 101 1,105 1,944 1.90 Multi-Family 1,095,174 1,094,284 956 — — 956 0.09 Commercial Real Estate 886,552 884,644 217 1,443 123 1,783 0.20 Commercial & Industrial 811,502 811,486 — 75 — 75 0.01 HELOC 134,151 133,236 297 70 548 915 0.68 Consumer 153,640 152,874 385 274 107 766 0.50 9,522,429 9,460,103 16,971 8,801 36,554 62,326 0.65 Acquired loans 140,369 137,107 265 529 2,468 3,262 2.32 Credit impaired acquired loans 96,491 91,168 — — 5,323 5,323 5.52 Covered loans 32,191 31,465 417 2 307 726 2.26 Total Loans $ 9,791,480 $ 9,719,843 $ 17,653 $ 9,332 $ 44,652 $ 71,637 0.73 % Delinquency % 99.27% 0.18% 0.10% 0.46% 0.73% September 30, 2015 Loans Receivable Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of Loans In Process Current 30 60 90 Total (In thousands) Non-acquired loans Single-Family Residential $ 5,655,928 $ 5,590,673 $ 17,305 $ 7,757 $ 40,193 $ 65,255 1.15 % Construction 130,121 130,121 — — — — — Construction - Custom 205,692 204,168 791 270 463 1,524 0.74 Land - Acquisition & Development 75,661 74,737 406 — 518 924 1.22 Land - Consumer Lot Loans 104,494 102,045 689 399 1,361 2,449 2.34 Multi-Family 1,068,038 1,065,667 259 454 1,658 2,371 0.22 Commercial Real Estate 893,072 892,180 131 — 761 892 0.10 Commercial & Industrial 617,545 616,602 93 27 823 943 0.15 HELOC 127,648 127,196 174 27 251 452 0.35 Consumer 194,977 194,259 493 170 55 718 0.37 9,073,176 8,997,648 20,341 9,104 46,083 75,528 0.83 Acquired loans 57,682 56,559 356 — 767 1,123 1.95 Credit impaired acquired loans 139,726 138,940 243 4 539 786 0.56 Covered loans 75,890 70,729 272 90 4,799 5,161 6.80 Total Loans $ 9,346,474 $ 9,263,876 $ 21,212 $ 9,198 $ 52,188 $ 82,598 0.88 % Delinquency % 99.12% 0.23% 0.10% 0.56% 0.88%
Schedule of Impaired Loans, Loan Commitments and Loans Serviced	The following tables provide information related to loans that were restructured in a troubled debt restructuring ("TDR") during the periods presented: Three Months Ended June 30, 2016 2015 Pre-Modification Post-Modification Pre-Modification Post-Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded Contracts Investment Investment Contracts Investment Investment (In thousands) (In thousands) Troubled Debt Restructurings: Single-family residential 7 $ 1,492 $ 1,492 8 $ 1,611 $ 1,611 Land - consumer lot loans — — — 2 203 203 Commercial real estate 2 1,558 1,558 — — — 9 $ 3,050 $ 3,050 10 $ 1,814 $ 1,814 Nine Months Ended June 30, 2016 2015 Pre-Modification Post-Modification Pre-Modification Post-Modification Outstanding Outstanding Outstanding Outstanding Number of Recorded Recorded Number of Recorded Recorded Contracts Investment Investment Contracts Investment Investment (In thousands) (In thousands) Troubled Debt Restructurings: Single-family residential 17 $ 3,322 $ 3,322 57 $ 13,875 $ 13,875 Construction — — — 2 718 718 Construction - custom — — — 2 532 532 Land - consumer lot loans — — — 6 923 923 Commercial real estate 7 2,523 2,523 3 3,175 3,175 Consumer — — — 1 85 85 24 $ 5,845 $ 5,845 71 $ 19,308 $ 19,308
Schedule of Loan Modifications	The following tables provide information on payment defaults occurring during the periods presented where the loan had been modified in a TDR within 12 months of the payment default. Three Months Ended June 30, 2016 2015 Number of Recorded Number of Recorded Contracts Investment Contracts Investment (In thousands) (In thousands) TDRs That Subsequently Defaulted: Single-family residential 3 $ 1,570 9 $ 1,594 Construction 1 279 — — Land - consumer lot loans 2 204 2 301 Commercial real estate 1 174 — — 7 $ 2,227 11 $ 1,895 Nine Months Ended June 30, 2016 2015 Number of Recorded Number of Recorded Contracts Investment Contracts Investment (In thousands) (In thousands) TDRs That Subsequently Defaulted: Single-family residential 14 $ 3,108 19 $ 3,329 Construction 1 279 — — Land - consumer lot loans 4 498 7 991 Commercial real estate 2 326 — — 21 $ 4,211 26 $ 4,320
Schedule of Changes in the Accretable Yield for Credit Impaired Acquired Loans	The following table shows the changes in accretable yield for acquired impaired loans and acquired non-impaired loans (including covered loans). Nine Months Ended June 30, 2016 Year Ended September 30, 2015 Acquired Impaired Acquired Non-impaired Acquired Impaired Acquired Non-impaired Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans Accretable Yield Carrying Amount of Loans (In thousands) (In thousands) Beginning balance $ 72,705 $ 111,300 $ 7,204 $ 187,080 $ 97,125 $ 135,826 $ 14,513 $ 275,862 Additions — — — — — — — — Net reclassification from non-accretable 4,867 — — — 6,307 — 346 — Accretion (17,119 ) 17,119 (2,210 ) 2,210 (30,727 ) 30,727 (7,655 ) 7,655 Transfers to REO — (175 ) — — — (2,975 ) — (150 ) Payments received, net — (31,823 ) — (31,439 ) — (52,278 ) — (96,287 ) Ending Balance $ 60,453 $ 96,421 $ 4,994 $ 157,851 $ 72,705 $ 111,300 $ 7,204 $ 187,080
Schedule of Activity for FDIC Indemnification Asset	The following table shows activity for the FDIC indemnification asset: Nine Months Ended June 30, 2016 Year Ended September 30, 2015 (In thousands) Balance at beginning of period $ 16,275 $ 36,860 Additions/Adjustments — (1,795 ) Payments received (1,827 ) (720 ) Amortization (1,385 ) (18,588 ) Accretion 187 518 Balance at end of period $ 13,250 $ 16,275

Allowance for Losses on Loans (

Allowance for Losses on Loans (Tables)	9 Months Ended
	Jun. 30, 2016
Receivables [Abstract]
Summary of Activity in Allowance for Loan Losses	The following tables summarize the activity in the allowance for loan losses. Three Months Ended June 30, 2016 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 41,828 $ (634 ) $ 162 $ (675 ) $ 40,681 Construction 15,726 — 207 1,729 17,662 Construction - custom 1,022 — 60 (54 ) 1,028 Land - acquisition & development 7,252 (31 ) 2,741 (3,240 ) 6,722 Land - consumer lot loans 2,466 (26 ) 5 59 2,504 Multi-family 6,784 — — 137 6,921 Commercial real estate 7,783 — 454 (94 ) 8,143 Commercial & industrial 23,824 (150 ) 6 716 24,396 HELOC 828 (27 ) — 55 856 Consumer 2,406 (307 ) 437 (433 ) 2,103 $ 109,919 $ (1,175 ) $ 4,072 $ (1,800 ) $ 111,016 Three Months Ended June 30, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 54,762 $ (1,698 ) $ 3,878 $ (4,938 ) $ 52,004 Construction 5,445 — — 488 5,933 Construction - custom 968 — — 17 985 Land - acquisition & development 7,405 — 1 (1,634 ) 5,772 Land - consumer lot loans 3,035 (276 ) 187 53 2,999 Multi-family 4,673 — — 362 5,035 Commercial real estate 6,734 (1,592 ) 230 1,896 7,268 Commercial & industrial 21,146 (2,106 ) 896 1,726 21,662 HELOC 850 (26 ) 1 39 864 Consumer 3,305 (853 ) 1,045 (408 ) 3,089 $ 108,323 $ (6,551 ) $ 6,238 $ (2,399 ) $ 105,611 Nine Months Ended June 30, 2016 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 47,347 $ (2,800 ) $ 2,739 $ (6,605 ) $ 40,681 Construction 6,680 — 357 10,625 17,662 Construction - custom 990 (60 ) 60 38 1,028 Land - acquisition & development 5,781 (31 ) 6,148 (5,176 ) 6,722 Land - consumer lot loans 2,946 (701 ) 5 254 2,504 Multi-family 5,304 — — 1,617 6,921 Commercial real estate 8,960 (32 ) 1,569 (2,354 ) 8,143 Commercial & industrial 24,980 (729 ) 597 (452 ) 24,396 HELOC 902 (54 ) 21 (13 ) 856 Consumer 2,939 (827 ) 1,226 (1,235 ) 2,103 $ 106,829 $ (5,234 ) $ 12,722 $ (3,301 ) $ 111,016 Nine Months Ended June 30, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 62,763 $ (4,801 ) $ 10,553 $ (16,511 ) $ 52,004 Construction 6,742 (388 ) 75 (496 ) 5,933 Construction - custom 1,695 — — (710 ) 985 Land - acquisition & development 5,592 (38 ) 206 12 5,772 Land - consumer lot loans 3,077 (363 ) 221 64 2,999 Multi-family 4,248 — 220 567 5,035 Commercial real estate 7,548 (1,619 ) 711 628 7,268 Commercial & industrial 16,527 (2,461 ) 948 6,648 21,662 HELOC 928 (26 ) 1 (39 ) 864 Consumer 3,227 (1,981 ) 2,394 (551 ) 3,089 Covered loans 2,244 (2,244 ) — $ 114,591 $ (11,677 ) $ 15,329 $ (12,632 ) $ 105,611
Summary of Loans Collectively and Individually Evaluated for Impairment and Related Allocation of Reserves	The following tables show loans collectively and individually evaluated for impairment and the related allocation of general and specific reserves. June 30, 2016 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment Allowance Allocation Recorded Investment of Loans (1) Ratio Allowance Allocation Recorded Investment of Loans (1) Ratio (In thousands) (In thousands) Single-family residential $ 39,986 $ 5,547,373 0.7 % $ 693 $ 24,451 2.8 % Construction 17,662 442,437 4.0 — — — Construction - custom 1,027 211,215 0.5 — 1,125 — Land - acquisition & development 6,710 87,099 7.7 13 1,454 0.9 Land - consumer lot loans 2,504 90,983 2.8 — 1,238 — Multi-family 6,911 1,091,709 0.6 11 1,513 0.7 Commercial real estate 7,963 848,187 0.9 180 21,313 0.8 Commercial & industrial 24,397 832,429 2.9 — — — HELOC 856 132,869 0.6 — 468 — Consumer 2,103 154,107 1.4 — — — $ 110,119 $ 9,438,408 1.2 % $ 897 $ 51,562 1.7 % (1) Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans September 30, 2015 Loans Collectively Evaluated for Impairment Loans Individually Evaluated for Impairment Allowance Allocation Recorded Investment of Loans (1) Ratio Allowance Allocation Recorded Investment of Loans (1) Ratio (In thousands) (In thousands) Single-family residential $ 47,073 $ 5,595,752 0.8 % $ 275 $ 51,718 0.5 % Construction 6,680 124,679 5.4 — 5,441 — Construction - custom 990 205,692 0.5 — — — Land - acquisition & development 5,781 72,602 8.0 — 2,198 — Land - consumer lot loans 2,946 93,103 3.2 — 10,824 — Multi-family 5,304 1,062,194 0.5 — 5,348 — Commercial real estate 8,960 844,691 1.1 — 8,826 — Commercial & industrial 24,980 643,577 3.9 — — — HELOC 902 126,594 0.7 — 1,072 — Consumer 2,938 194,569 1.5 — 86 — $ 106,554 $ 8,963,453 1.2 % $ 275 $ 85,513 0.3 % (1) Excludes acquired loans with discounts sufficient to absorb potential losses and covered loans
Summary of Loans Based on Credit Quality Indicators	The following tables provide information on loans based on risk rating categories as defined above. June 30, 2016 Internally Assigned Grade Pass Special mention Substandard Doubtful Loss Total Gross Loans (In thousands) Non-acquired loans Single-family residential $ 5,533,837 $ — $ 59,181 $ — $ — $ 5,593,018 Construction 1,012,203 — 4,102 — — 1,016,305 Construction - custom 408,538 — 578 — — 409,116 Land - acquisition & development 94,830 — 7,019 — — 101,849 Land - consumer lot loans 100,173 — 1,558 — — 101,731 Multi-family 1,087,363 3,252 4,121 — — 1,094,736 Commercial real estate 861,771 11,345 13,841 — — 886,957 Commercial & industrial 755,361 6,532 48,549 — — 810,442 HELOC 133,939 — 796 — — 134,735 Consumer 154,148 — 113 — — 154,261 10,142,163 21,129 139,858 — — 10,303,150 Non-impaired acquired loans 132,710 47 7,612 — — 140,369 Credit-impaired acquired loans 65,106 — 31,381 — 4 96,491 Covered loans 31,849 — 342 — — 32,191 Total gross loans $ 10,371,828 $ 21,176 $ 179,193 $ — $ 4 $ 10,572,201 Total grade as a % of total gross loans 98.1 % 0.2 % 1.7 % — % — % September 30, 2015 Internally Assigned Grade Pass Special mention Substandard Doubtful Loss Total Gross Loans (In thousands) Non-acquired loans Single-family residential $ 5,558,700 $ — $ 93,145 $ — $ — $ 5,651,845 Construction 197,935 — 2,574 — — 200,509 Construction - custom 396,307 — — — — 396,307 Land - acquisition & development 89,656 — 4,552 — — 94,208 Land - consumer lot loans 103,569 — 420 — — 103,989 Multi-family 1,118,673 865 6,184 — — 1,125,722 Commercial real estate 971,510 4,360 10,400 — — 986,270 Commercial & industrial 575,034 1,496 36,306 — — 612,836 HELOC 127,398 — 248 — — 127,646 Consumer 194,451 — 204 — — 194,655 9,333,233 6,721 154,033 — — 9,493,987 Non-impaired acquired loans 149,891 — 16,402 — — 166,293 Credit-impaired acquired loans 61,019 — 26,062 — — 87,081 Covered loans 61,776 — 14,133 — — 75,909 Total gross loans $ 9,605,919 $ 6,721 $ 210,630 $ — $ — $ 9,823,270 Total grade as a % of total gross loans 97.8 % 0.1 % 2.1 % — % — % The following tables provide information on loans (excluding acquired and covered loans) based on borrower payment activity. June 30, 2016 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) Single-family residential $ 5,556,312 99.3 % $ 36,707 0.7 % Construction 1,016,305 100.0 — — Construction - custom 408,610 99.9 506 0.1 Land - acquisition & development 101,422 99.6 427 0.4 Land - consumer lot loans 100,626 98.9 1,105 1.1 Multi-family 1,093,495 99.9 1,238 0.1 Commercial real estate 880,661 99.3 6,297 0.7 Commercial & industrial 809,921 99.9 521 0.1 HELOC 134,188 99.6 548 0.4 Consumer 154,261 100.0 — — $ 10,255,801 99.5 % $ 47,349 0.5 % September 30, 2015 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) Single-family residential $ 5,592,771 99.0 % $ 59,074 1.0 % Construction 199,755 99.6 754 0.4 Construction - custom 395,575 99.8 732 0.2 Land - acquisition & development 94,208 100.0 — — Land - consumer lot loans 102,716 98.8 1,273 1.2 Multi-family 1,123,165 99.8 2,558 0.2 Commercial real estate 984,093 99.8 2,176 0.2 Commercial & industrial 612,836 100.0 — — HELOC 127,083 99.6 563 0.4 Consumer 193,975 99.7 680 0.3 $ 9,426,177 99.3 % $ 67,810 0.7 %
Summary of Impaired Loans Based on Type	The following tables provide information on impaired loan balances and the related allowances by loan types. June 30, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 9,602 $ 11,287 $ — $ 8,491 Construction - custom 578 578 — 289 Land - acquisition & development 164 8,393 — 164 Land - consumer lot loans 650 747 — 599 Multi-family 428 4,177 — 736 Commercial real estate 5,673 6,588 — 5,697 Commercial & industrial 906 7,627 — 544 HELOC 368 483 — 354 Consumer 33 483 — 17 18,402 40,363 — 16,891 Impaired loans with an allowance recorded: Single-family residential 223,533 227,633 4,202 224,274 Land - acquisition & development 1,454 2,656 8 1,543 Land - consumer lot loans 9,672 10,734 5 9,748 Multi-family 1,513 1,513 11 1,518 Commercial real estate 20,490 24,316 180 19,816 HELOC 1,379 1,394 — 1,388 Consumer 95 285 — 95 258,136 268,531 4,406 (1) 258,382 Total impaired loans: Single-family residential 233,135 238,920 4,202 232,765 Construction - custom 578 578 — 289 Land - acquisition & development 1,618 11,049 8 1,707 Land - consumer lot loans 10,322 11,481 5 10,347 Multi-family 1,941 5,690 11 2,254 Commercial real estate 26,163 30,904 180 25,513 Commercial & industrial 906 7,627 — 544 HELOC 1,747 1,877 — 1,742 Consumer 128 768 — 112 $ 276,538 $ 308,894 $ 4,406 (1) $ 275,273 (1) Includes $897,000 of specific reserves and $3,509,000 included in the general reserves. September 30, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) Impaired loans with no related allowance recorded: Single-family residential $ 17,250 $ 19,644 $ — $ 14,069 Construction 453 2,151 — 471 Construction - custom 554 554 — 182 Land - acquisition & development 2,570 9,426 — 926 Land - consumer lot loans 727 814 — 544 Multi-family 3,770 7,054 — 1,545 Commercial real estate 9,427 15,620 — 8,130 Commercial & industrial 2,955 13,066 — 2,681 HELOC 683 1,532 — 536 Consumer 477 703 — 390 38,866 70,564 — 29,474 Impaired loans with an allowance recorded: Single-family residential 259,461 263,268 6,678 260,028 Construction 4,988 5,778 — 5,432 Land - acquisition & development 2,486 3,426 — 3,478 Land - consumer lot loans 11,289 11,554 — 11,324 Multi-family 3,823 3,823 — 3,732 Commercial real estate 19,124 21,078 — 18,886 HELOC 1,443 1,443 — 1,359 Consumer 99 289 — 102 302,713 310,659 6,678 (1) 304,341 Total impaired loans: Single-family residential 276,711 282,912 6,678 274,097 Construction 5,441 7,929 — 5,903 Construction - custom 554 554 — 182 Land - acquisition & development 5,056 12,852 — 4,404 Land - consumer lot loans 12,016 12,368 — 11,868 Multi-family 7,593 10,877 — 5,277 Commercial real estate 28,551 36,698 — 27,016 Commercial & industrial 2,955 13,066 — 2,681 HELOC 2,126 2,975 — 1,895 Consumer 576 992 — 492 $ 341,579 $ 381,223 $ 6,678 (1) $ 333,815 (1) Includes $275,000 of specific reserves and $6,403,000 included in the general reserves

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value of Assets Measured on Recurring Basis	The following tables present the balance of assets and liabilities measured at fair value on a recurring basis. June 30, 2016 Level 1 Level 2 Level 3 Total (In thousands) Financial Assets Available-for-sale securities: Equity securities $ 101,885 $ — $ — $ 101,885 Obligations of U.S. government — 249,053 — 249,053 Obligations of states and political subdivisions — 27,488 — 27,488 Corporate debt securities — 460,399 — 460,399 Mortgage-backed securities Agency pass-through certificates — 1,046,506 — 1,046,506 Commercial MBS — 84,538 — 84,538 Total available-for-sale securities 101,885 1,867,984 — 1,969,869 Interest rate contracts — 22,085 — 22,085 Total financial assets $ 101,885 $ 1,890,069 $ — $ 1,991,954 Financial Liabilities Interest rate contracts $ — $ 22,085 $ — $ 22,085 Commercial loan hedge — 3,394 — 3,394 Long term borrowing hedge — 35,533 — 35,533 Total financial liabilities $ — $ 61,012 $ — $ 61,012 There were no transfers between, into and/or out of Levels 1, 2 or 3 during the nine months ended June 30, 2016 . September 30, 2015 Level 1 Level 2 Level 3 Total (In thousands) Financial Assets Available-for-sale securities: Equity securities $ 101,952 $ — $ — $ 101,952 Obligations of U.S. government — 482,464 — 482,464 Obligations of states and political subdivisions — 27,123 — 27,123 Corporate debt securities — 505,800 — 505,800 Mortgage-backed securities Agency pass-through certificates — 1,160,518 — 1,160,518 Commercial MBS — 102,706 — 102,706 Total available-for-sale securities 101,952 2,278,611 — 2,380,563 Interest rate contracts — 11,879 — 11,879 Total financial assets $ 101,952 $ 2,290,490 $ — $ 2,392,442 Financial Liabilities Interest rate contracts $ — $ 11,879 $ — $ 11,879 Commercial loan hedge — 966 — 966 Long term borrowing hedge — 14,555 — 14,555 Total financial liabilities $ — $ 27,400 $ — $ 27,400
Aggregated Balance of Assets Measured at Estimated Fair Value on a Nonrecurring Basis and Total Losses Resulting from Those Fair Value Adjustments	The following tables present the aggregated balance of assets that were measured at fair value on a nonrecurring basis at June 30, 2016 and June 30, 2015 , and the total gains (losses) resulting from those fair value adjustments for the nine months ended June 30, 2016 and June 30, 2015 . The estimated fair value measurements are shown gross of estimated selling costs. June 30, 2016 Three Months Ended June 30, 2016 Nine Months Ended June 30, 2016 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 15,724 $ 15,724 $ (692 ) $ (3,762 ) Real estate owned (2) — — 19,853 19,853 (614 ) (2,944 ) Balance at end of period $ — $ — $ 35,577 $ 35,577 $ (1,306 ) $ (6,706 ) (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on REO. June 30, 2015 Three Months Ended June 30, 2015 Nine Months Ended June 30, 2015 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 6,735 $ 6,735 $ (3,621 ) $ (4,201 ) Real estate owned (2) — — 73,781 73,781 (2,366 ) 8,403 Balance at end of period $ — $ — $ 80,516 $ 80,516 $ (5,987 ) $ 4,202 (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on REO.
Fair Value of Financial Instruments by Balance Sheet Grouping	Although management is not aware of any factors that would materially affect the estimated fair value amounts presented below, such amounts have not been comprehensively revalued for purposes of these financial statements since the dates shown, and therefore, estimates of fair value subsequent to those dates may differ significantly from the amounts presented below. June 30, 2016 September 30, 2015 Level in Fair Value Hierarchy Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value (In thousands) Financial assets Cash and cash equivalents 1 $ 530,055 $ 530,055 $ 284,049 $ 284,049 Available-for-sale securities Equity securities 1 101,885 101,885 101,952 101,952 Obligations of U.S. government 2 249,053 249,053 482,464 482,464 Obligations of states and political subdivisions 2 27,488 27,488 27,123 27,123 Corporate debt securities 2 460,399 460,399 505,800 505,800 Mortgage-backed securities Agency pass-through certificates 2 1,046,506 1,046,506 1,160,518 1,160,518 Commercial MBS 2 84,538 84,538 102,706 102,706 Total available-for-sale securities 1,969,869 1,969,869 2,380,563 2,380,563 Held-to-maturity securities 2 Mortgage-backed securities Agency pass-through certificates 2 1,492,480 1,512,666 1,643,216 1,637,420 Total held-to-maturity securities 1,492,480 1,512,666 1,643,216 1,637,420 Loans receivable 3 9,628,576 10,206,509 9,170,634 9,667,750 FDIC indemnification asset 3 13,250 12,633 16,275 15,522 FHLB and FRB stock 2 117,205 117,205 107,198 107,198 Other assets - interest rate contracts 2 22,085 22,085 11,879 11,879 Financial liabilities Customer accounts 2 10,578,916 10,182,610 10,631,703 10,004,290 FHLB advances 2 2,080,000 2,211,686 1,830,000 1,938,384 Other liabilities - interest rate contracts 2 22,085 22,085 11,879 11,879 Other liabilities - commercial loan hedge 2 3,394 3,394 966 966 Other liabilities - long term borrowing hedge 2 35,533 35,533 14,555 14,555 The following table presents the fair value and balance sheet classification of derivatives at June 30, 2016 and September 30, 2015 : Asset Derivatives Liability Derivatives June 30, 2016 September 30, 2015 June 30, 2016 September 30, 2015 Balance Sheet Balance Sheet Balance Sheet Balance Sheet Location Fair Value Location Fair Value Location Fair Value Location Fair Value (In thousands) Interest rate contracts Other assets $ 22,085 Other assets $ 11,879 Other liabilities $ 22,085 Other liabilities $ 11,879 Commercial loan hedge Other assets — Other assets — Other liabilities 3,394 Other liabilities 966 Long term borrowing hedge Other assets — Other assets — Other liabilities 35,533 Other liabilities 14,555 $ 22,085 $ 11,879 $ 61,012 $ 27,400
Reconciliation of Amortized Cost to Fair Value of Available-for-Sale and Held-to-Maturity Securities	The following tables provide a reconciliation of amortized cost to fair value of available-for-sale and held-to-maturity securities. June 30, 2016 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due Within 1 year $ 25,980 $ — $ (65 ) $ 25,915 0.73 % 1 to 5 years $ 13,268 $ 1,273 $ (23 ) $ 14,518 7.49 % 5 to 10 years 49,174 — (1,526 ) 47,648 1.06 Over 10 years 165,032 — (4,060 ) 160,972 1.14 Equity Securities Within 1 year 500 22 — 522 1.80 1 to 5 years 99,922 1,441 — 101,363 1.90 Corporate bonds due Within 1 year 250,000 263 — 250,263 1.07 1 to 5 years 71,540 148 (106 ) 71,582 1.97 5 to 10 years 89,954 518 (2,793 ) 87,679 2.02 Over 10 years 50,000 875 — 50,875 3.00 Municipal bonds due 1 to 5 years 2,307 18 — 2,325 1.23 5 to 10 years 1,327 65 — 1,392 2.05 Over 10 years 20,367 3,404 — 23,771 6.45 Mortgage-backed securities Agency pass-through certificates 1,033,736 16,277 (3,507 ) 1,046,506 2.58 Commercial MBS 86,057 — (1,519 ) 84,538 1.79 1,959,164 24,304 (13,599 ) 1,969,869 2.17 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,492,480 20,764 (578 ) 1,512,666 3.18 $ 3,451,644 $ 45,068 $ (14,177 ) $ 3,482,535 2.60 % September 30, 2015 Amortized Cost Gross Unrealized Fair Value Yield Gains Losses (In thousands) Available-for-sale securities U.S. government and agency securities due 1 to 5 years $ 105,065 $ 1,923 $ (274 ) $ 106,714 1.74 % 5 to 10 years 119,071 35 (1,247 ) 117,859 1.54 Over 10 years 262,832 — (4,941 ) 257,891 1.23 Equity Securities Within 1 year 500 17 — 517 1.80 1 to 5 years 99,922 1,513 — 101,435 1.90 Corporate bonds due Within 1 year 24,787 191 — 24,978 0.53 1 to 5 years 311,435 1,190 (58 ) 312,567 0.88 5 to 10 years 100,000 876 (3,524 ) 97,352 1.47 Over 10 years 69,950 953 — 70,903 3.00 Municipal bonds due 1 to 5 years 2,285 8 — 2,293 1.23 5 to 10 years 1,303 7 — 1,310 2.05 Over 10 years 20,382 3,138 — 23,520 6.45 Mortgage-backed securities Agency pass-through certificates 1,144,787 18,222 (2,491 ) 1,160,518 2.48 Commercial MBS 103,131 85 (510 ) 102,706 1.51 2,365,450 28,158 (13,045 ) 2,380,563 1.97 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,643,216 10,516 (16,312 ) 1,637,420 3.19 $ 4,008,666 $ 38,674 $ (29,357 ) $ 4,017,983 2.46 %
Schedule of Unrealized Losses and Fair Value of Securities	The following tables show the unrealized gross losses and fair value of securities as of June 30, 2016 and September 30, 2015 , by length of time that individual securities in each category have been in a continuous loss position. The decline in fair value is attributable to changes in interest rates. Because the Company does not intend to sell these securities and does not consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other than temporarily impaired. June 30, 2016 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate bonds due $ (512 ) $ 19,442 $ (2,387 ) $ 57,613 $ (2,899 ) $ 77,055 U.S. government and agency securities due (3,199 ) 122,397 (2,475 ) 116,082 (5,674 ) 238,479 Agency pass-through certificates (1,911 ) 371,804 (3,693 ) 385,416 (5,604 ) 757,220 $ (5,622 ) $ 513,643 $ (8,555 ) $ 559,111 $ (14,177 ) $ 1,072,754 September 30, 2015 Less than 12 months 12 months or more Total Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value Unrealized Gross Losses Fair Value (In thousands) Corporate bonds due $ (183 ) $ 72,862 $ (3,399 ) $ 46,601 $ (3,582 ) $ 119,463 U.S. government and agency securities due (5,010 ) 336,243 (1,452 ) 57,344 (6,462 ) 393,587 Agency pass-through certificates (1,036 ) 169,541 (18,277 ) 1,193,463 (19,313 ) 1,363,004 $ (6,229 ) $ 578,646 $ (23,128 ) $ 1,297,408 $ (29,357 ) $ 1,876,054

Derivatives and Hedging Activ19

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value and Balance Sheet Classification	Although management is not aware of any factors that would materially affect the estimated fair value amounts presented below, such amounts have not been comprehensively revalued for purposes of these financial statements since the dates shown, and therefore, estimates of fair value subsequent to those dates may differ significantly from the amounts presented below. June 30, 2016 September 30, 2015 Level in Fair Value Hierarchy Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value (In thousands) Financial assets Cash and cash equivalents 1 $ 530,055 $ 530,055 $ 284,049 $ 284,049 Available-for-sale securities Equity securities 1 101,885 101,885 101,952 101,952 Obligations of U.S. government 2 249,053 249,053 482,464 482,464 Obligations of states and political subdivisions 2 27,488 27,488 27,123 27,123 Corporate debt securities 2 460,399 460,399 505,800 505,800 Mortgage-backed securities Agency pass-through certificates 2 1,046,506 1,046,506 1,160,518 1,160,518 Commercial MBS 2 84,538 84,538 102,706 102,706 Total available-for-sale securities 1,969,869 1,969,869 2,380,563 2,380,563 Held-to-maturity securities 2 Mortgage-backed securities Agency pass-through certificates 2 1,492,480 1,512,666 1,643,216 1,637,420 Total held-to-maturity securities 1,492,480 1,512,666 1,643,216 1,637,420 Loans receivable 3 9,628,576 10,206,509 9,170,634 9,667,750 FDIC indemnification asset 3 13,250 12,633 16,275 15,522 FHLB and FRB stock 2 117,205 117,205 107,198 107,198 Other assets - interest rate contracts 2 22,085 22,085 11,879 11,879 Financial liabilities Customer accounts 2 10,578,916 10,182,610 10,631,703 10,004,290 FHLB advances 2 2,080,000 2,211,686 1,830,000 1,938,384 Other liabilities - interest rate contracts 2 22,085 22,085 11,879 11,879 Other liabilities - commercial loan hedge 2 3,394 3,394 966 966 Other liabilities - long term borrowing hedge 2 35,533 35,533 14,555 14,555 The following table presents the fair value and balance sheet classification of derivatives at June 30, 2016 and September 30, 2015 : Asset Derivatives Liability Derivatives June 30, 2016 September 30, 2015 June 30, 2016 September 30, 2015 Balance Sheet Balance Sheet Balance Sheet Balance Sheet Location Fair Value Location Fair Value Location Fair Value Location Fair Value (In thousands) Interest rate contracts Other assets $ 22,085 Other assets $ 11,879 Other liabilities $ 22,085 Other liabilities $ 11,879 Commercial loan hedge Other assets — Other assets — Other liabilities 3,394 Other liabilities 966 Long term borrowing hedge Other assets — Other assets — Other liabilities 35,533 Other liabilities 14,555 $ 22,085 $ 11,879 $ 61,012 $ 27,400

Summary of Significant Accoun20

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans in process	$ 780,721	$ 476,796
Loans and Leases Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans in process	$ 1,125,481	$ 816,014

Dividends and Share Repurchas21

Dividends and Share Repurchases (Details) - $ / shares	Jul. 25, 2016	May 13, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Dividends Payable [Line Items]
Cash dividends per share (in dollars per share)		$ 0.14	$ 0.14	$ 0.13	$ 0.41	$ 0.41
Stock repurchased (in shares)			1,097,397	1,171,662
Average cost per share (in dollars per share)			$ 23.33	$ 21.93
Remaining shares authorized to be repurchased (in shares)			1,041,309		1,041,309
Subsequent Event
Dividends Payable [Line Items]
Dividends declared (in dollars per share)	$ 0.14

Loans Receivable - Schedule of

Loans Receivable - Schedule of Accounts, Notes, Loans, and Financing Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 10,572,201		$ 9,823,270
Ratio of type of loan to total loans receivable	100.00%		100.00%
Allowance for loan losses	$ 111,016	$ 109,919	$ 106,829	$ 105,611	$ 108,323	$ 114,591
Loans in process	780,721		476,796
Discount on acquired loans	14,775		30,095
Deferred net origination fees	37,113		38,916
Total loan contra accounts	943,625		652,636
Net Loans	9,628,576		9,170,634
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	40,681	41,828	47,347	52,004	54,762	62,763
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	17,662	15,726	6,680	5,933	5,445	6,742
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,028	1,022	990	985	968	1,695
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	6,722	7,252	5,781	5,772	7,405	5,592
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,504	2,466	2,946	2,999	3,035	3,077
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	6,921	6,784	5,304	5,035	4,673	4,248
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	8,143	7,783	8,960	7,268	6,734	7,548
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	24,396	23,824	24,980	21,662	21,146	16,527
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	856	828	902	864	850	928
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,103	$ 2,406	2,939	$ 3,089	$ 3,305	$ 3,227
Non-Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 10,303,150		$ 9,493,987
Ratio of type of loan to total loans receivable	97.50%		96.80%
Non-Acquired loans | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 5,593,018		$ 5,651,845
Ratio of type of loan to total loans receivable	52.90%		57.60%
Non-Acquired loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,016,305		$ 200,509
Ratio of type of loan to total loans receivable	9.60%		2.00%
Non-Acquired loans | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 409,116		$ 396,307
Ratio of type of loan to total loans receivable	3.90%		4.00%
Non-Acquired loans | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 101,849		$ 94,208
Ratio of type of loan to total loans receivable	1.00%		1.00%
Non-Acquired loans | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 101,731		$ 103,989
Ratio of type of loan to total loans receivable	1.00%		1.10%
Non-Acquired loans | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 1,094,736		$ 1,125,722
Ratio of type of loan to total loans receivable	10.30%		11.60%
Non-Acquired loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 886,957		$ 986,270
Ratio of type of loan to total loans receivable	8.40%		10.00%
Non-Acquired loans | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 810,442		$ 612,836
Ratio of type of loan to total loans receivable	7.70%		6.20%
Non-Acquired loans | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 134,735		$ 127,646
Ratio of type of loan to total loans receivable	1.30%		1.30%
Non-Acquired loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 154,261		$ 194,655
Ratio of type of loan to total loans receivable	1.40%		2.00%
Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 140,369		$ 166,293
Ratio of type of loan to total loans receivable	1.30%		1.60%
Credit impaired acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 96,491		$ 87,081
Ratio of type of loan to total loans receivable	0.90%		0.90%
Covered loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 32,191		$ 75,909
Ratio of type of loan to total loans receivable	0.30%		0.70%

Loans Receivable - Loans on No

Loans Receivable - Loans on Non-accrual Status (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 47,349	$ 67,810
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	100.00%	100.00%
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 36,707	$ 59,074
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	77.50%	87.10%
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 0	$ 754
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	1.10%
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 506	$ 732
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	1.10%	1.10%
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 427	$ 0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.90%	0.00%
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 1,105	$ 1,273
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.30%	1.90%
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 1,238	$ 2,558
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.60%	3.80%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 6,297	$ 2,176
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	13.30%	3.20%
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 521	$ 0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	1.10%	0.00%
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 548	$ 563
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	1.20%	0.80%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 0	$ 680
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.00%	1.00%

Loans Receivable - Additional

Loans Receivable - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment			$ 4,100
Impaired, interest lost on nonaccrual loans			$ 1,865
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.73%		0.73%		0.90%	0.88%
Percent of TDRs classified as performing			96.00%
Troubled debt restructuring, amount	$ 3,050	$ 1,814	$ 5,845	$ 19,308
Basis point reduction, minimum			1.00%
Basis point reduction, maximum			2.00%
Single family residential loans as percentage of restructured loans	86.70%		86.70%
Loans receivable, gross	$ 10,572,201		$ 10,572,201			$ 9,823,270
Covered loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.26%		2.26%			6.80%
Loans receivable, gross	$ 32,191		$ 32,191			$ 75,909
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term for payment and rate reduction			6 months
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term for payment and rate reduction			24 months
Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructuring, amount			$ 258,135

Loans Receivable - Loans Recei

Loans Receivable - Loans Receivable, Analysis of Age of Loans in Past Due Status (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 9,791,480		$ 9,346,474
Current	9,719,843		9,263,876
Past due	$ 71,637		$ 82,598
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.73%	0.90%	0.88%
Ratio of total past due loans to total loans receivable, current	99.27%		99.12%
Ratio of total past due loans to total loans receivable, past due	0.73%		0.88%
Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 17,653		$ 21,212
Ratio of total past due loans to total loans receivable, past due	0.18%		0.23%
Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 9,332		$ 9,198
Ratio of total past due loans to total loans receivable, past due	0.10%		0.10%
Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 44,652		$ 52,188
Ratio of total past due loans to total loans receivable, past due	0.46%		0.56%
Non-Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 9,522,429		$ 9,073,176
Current	9,460,103		8,997,648
Past due	$ 62,326		$ 75,528
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.65%		0.83%
Non-Acquired loans | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 5,596,644		$ 5,655,928
Current	5,542,000		5,590,673
Past due	$ 54,644		$ 65,255
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.98%		1.15%
Non-Acquired loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 442,810		$ 130,121
Current	442,810		130,121
Past due	$ 0		$ 0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.00%		0.00%
Non-Acquired loans | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 213,465		$ 205,692
Current	212,690		204,168
Past due	$ 775		$ 1,524
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.36%		0.74%
Non-Acquired loans | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 86,243		$ 75,661
Current	85,775		74,737
Past due	$ 468		$ 924
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.54%		1.22%
Non-Acquired loans | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 102,248		$ 104,494
Current	100,304		102,045
Past due	$ 1,944		$ 2,449
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.90%		2.34%
Non-Acquired loans | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 1,095,174		$ 1,068,038
Current	1,094,284		1,065,667
Past due	$ 956		$ 2,371
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.09%		0.22%
Non-Acquired loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 886,552		$ 893,072
Current	884,644		892,180
Past due	$ 1,783		$ 892
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.20%		0.10%
Non-Acquired loans | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 811,502		$ 617,545
Current	811,486		616,602
Past due	$ 75		$ 943
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.01%		0.15%
Non-Acquired loans | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 134,151		$ 127,648
Current	133,236		127,196
Past due	$ 915		$ 452
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.68%		0.35%
Non-Acquired loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 153,640		$ 194,977
Current	152,874		194,259
Past due	$ 766		$ 718
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.50%		0.37%
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 16,971		$ 20,341
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	14,268		17,305
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	110		791
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		406
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	738		689
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	956		259
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	217		131
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		93
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	297		174
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	385		493
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	8,801		9,104
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	6,679		7,757
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	159		270
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	101		399
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		454
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,443		0
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	75		27
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	70		27
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	274		170
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	36,554		46,083
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	33,697		40,193
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		0
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	506		463
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	468		518
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,105		1,361
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		1,658
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	123		761
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		823
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	548		251
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	107		55
Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	140,369		57,682
Current	137,107		56,559
Past due	$ 3,262		$ 1,123
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.32%		1.95%
Acquired loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 265		$ 356
Acquired loans | Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	529		0
Acquired loans | Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2,468		767
Credit impaired acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	96,491		139,726
Current	91,168		138,940
Past due	$ 5,323		$ 786
Ratio of past due loans to total loans, net of charge-offs and LIPs	5.52%		0.56%
Credit impaired acquired loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 0		$ 243
Credit impaired acquired loans | Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	0		4
Credit impaired acquired loans | Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	5,323		539
Covered loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	32,191		75,890
Current	31,465		70,729
Past due	$ 726		$ 5,161
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.26%		6.80%
Covered loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 417		$ 272
Covered loans | Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2		90
Covered loans | Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 307		$ 4,799

Loans Receivable - Troubled De

Loans Receivable - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016USD ($)contract	Jun. 30, 2015USD ($)contract	Jun. 30, 2016USD ($)contract	Jun. 30, 2015USD ($)contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	9	10	24	71
Pre-modification outstanding recorded investment	$ 3,050	$ 1,814	$ 5,845	$ 19,308
Post-modification outstanding recorded investment	$ 3,050	$ 1,814	$ 5,845	$ 19,308
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	7	8	17	57
Pre-modification outstanding recorded investment	$ 1,492	$ 1,611	$ 3,322	$ 13,875
Post-modification outstanding recorded investment	$ 1,492	$ 1,611	$ 3,322	$ 13,875
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract			0	2
Pre-modification outstanding recorded investment			$ 0	$ 718
Post-modification outstanding recorded investment			$ 0	$ 718
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract			0	2
Pre-modification outstanding recorded investment			$ 0	$ 532
Post-modification outstanding recorded investment			$ 0	$ 532
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	0	2	0	6
Pre-modification outstanding recorded investment	$ 0	$ 203	$ 0	$ 923
Post-modification outstanding recorded investment	$ 0	$ 203	$ 0	$ 923
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	2	0	7	3
Pre-modification outstanding recorded investment	$ 1,558	$ 0	$ 2,523	$ 3,175
Post-modification outstanding recorded investment	$ 1,558	$ 0	$ 2,523	$ 3,175
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract			0	1
Pre-modification outstanding recorded investment			$ 0	$ 85
Post-modification outstanding recorded investment			$ 0	$ 85

Loans Receivable - Loan Modifi

Loans Receivable - Loan Modifications (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016USD ($)contract	Jun. 30, 2015USD ($)contract	Jun. 30, 2016USD ($)contract	Jun. 30, 2015USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	7	11	21	26
Recorded investment | $	$ 2,227	$ 1,895	$ 4,211	$ 4,320
Single-family residential
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	3	9	14	19
Recorded investment | $	$ 1,570	$ 1,594	$ 3,108	$ 3,329
Construction
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	1	0	1	0
Recorded investment | $	$ 279	$ 0	$ 279	$ 0
Land - consumer lot loans
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	2	2	4	7
Recorded investment | $	$ 204	$ 301	$ 498	$ 991
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	1	0	2	0
Recorded investment | $	$ 174	$ 0	$ 326	$ 0

Loans Receivable - Schedule 28

Loans Receivable - Schedule of Changes in the Accretable Yield for Acquired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2016	Sep. 30, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretion	$ 187	$ 518
Credit impaired acquired loans
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period, accretable yield	72,705	97,125
Balance at beginning of period, carrying amount of loans	111,300	135,826
Additions, accretable yield	0	0
Additions, carrying amount of loans	0	0
Reclassification from nonaccretable balance, net, accretable yield	4,867	6,307
Reclassification from nonaccretable balance, net, carrying value of loans	0	0
Accretion, accretable yield	(17,119)	(30,727)
Accretion	17,119	30,727
Transfers to REO, accretable yield	0	0
Transfers to REO, carrying amount of loans	(175)	(2,975)
Payments received, net, accretable yield	0	0
Payments received, net, carrying amount of loans	(31,823)	(52,278)
Balance at end of period, accretable yield	60,453	72,705
Balance at end of period, carrying amount of loans	96,421	111,300
Acquired Non-Impaired Loans
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period, accretable yield	7,204	14,513
Balance at beginning of period, carrying amount of loans	187,080	275,862
Additions, accretable yield	0	0
Additions, carrying amount of loans	0	0
Reclassification from nonaccretable balance, net, accretable yield	0	346
Reclassification from nonaccretable balance, net, carrying value of loans	0	0
Accretion, accretable yield	(2,210)	(7,655)
Accretion	2,210	7,655
Transfers to REO, accretable yield	0	0
Transfers to REO, carrying amount of loans	0	(150)
Payments received, net, accretable yield	0	0
Payments received, net, carrying amount of loans	(31,439)	(96,287)
Balance at end of period, accretable yield	4,994	7,204
Balance at end of period, carrying amount of loans	$ 157,851	$ 187,080

Loans Receivable - FDIC Indemn

Loans Receivable - FDIC Indemnification Asset (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2016	Sep. 30, 2015
FDIC Indemnification Asset [Roll Forward]
Balance at beginning of period	$ 16,275	$ 36,860
Additions/Adjustments	0	(1,795)
Payments received	(1,827)	(720)
Amortization	(1,385)	(18,588)
Accretion	187	518
Balance at end of period	$ 13,250	$ 16,275

Allowance for Losses on Loans

Allowance for Losses on Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	$ 109,919	$ 108,323	$ 106,829	$ 114,591
Charge-offs	(1,175)	(6,551)	(5,234)	(11,677)
Recoveries	4,072	6,238	12,722	15,329
Provision & Transfers	(1,800)	(2,399)	(3,301)	(12,632)
Ending Allowance	111,016	105,611	111,016	105,611
Single-family residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	41,828	54,762	47,347	62,763
Charge-offs	(634)	(1,698)	(2,800)	(4,801)
Recoveries	162	3,878	2,739	10,553
Provision & Transfers	(675)	(4,938)	(6,605)	(16,511)
Ending Allowance	40,681	52,004	40,681	52,004
Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	15,726	5,445	6,680	6,742
Charge-offs	0	0	0	(388)
Recoveries	207	0	357	75
Provision & Transfers	1,729	488	10,625	(496)
Ending Allowance	17,662	5,933	17,662	5,933
Construction - custom
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	1,022	968	990	1,695
Charge-offs	0	0	(60)	0
Recoveries	60	0	60	0
Provision & Transfers	(54)	17	38	(710)
Ending Allowance	1,028	985	1,028	985
Land - acquisition & development
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	7,252	7,405	5,781	5,592
Charge-offs	(31)	0	(31)	(38)
Recoveries	2,741	1	6,148	206
Provision & Transfers	(3,240)	(1,634)	(5,176)	12
Ending Allowance	6,722	5,772	6,722	5,772
Land - consumer lot loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	2,466	3,035	2,946	3,077
Charge-offs	(26)	(276)	(701)	(363)
Recoveries	5	187	5	221
Provision & Transfers	59	53	254	64
Ending Allowance	2,504	2,999	2,504	2,999
Multi-family
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	6,784	4,673	5,304	4,248
Charge-offs	0	0	0	0
Recoveries	0	0	0	220
Provision & Transfers	137	362	1,617	567
Ending Allowance	6,921	5,035	6,921	5,035
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	7,783	6,734	8,960	7,548
Charge-offs	0	(1,592)	(32)	(1,619)
Recoveries	454	230	1,569	711
Provision & Transfers	(94)	1,896	(2,354)	628
Ending Allowance	8,143	7,268	8,143	7,268
Commercial & industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	23,824	21,146	24,980	16,527
Charge-offs	(150)	(2,106)	(729)	(2,461)
Recoveries	6	896	597	948
Provision & Transfers	716	1,726	(452)	6,648
Ending Allowance	24,396	21,662	24,396	21,662
HELOC
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	828	850	902	928
Charge-offs	(27)	(26)	(54)	(26)
Recoveries	0	1	21	1
Provision & Transfers	55	39	(13)	(39)
Ending Allowance	856	864	856	864
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	2,406	3,305	2,939	3,227
Charge-offs	(307)	(853)	(827)	(1,981)
Recoveries	437	1,045	1,226	2,394
Provision & Transfers	(433)	(408)	(1,235)	(551)
Ending Allowance	$ 2,103	3,089	$ 2,103	3,089
Covered loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				2,244
Provision & Transfers				(2,244)
Ending Allowance		$ 0		$ 0

Allowance for Losses on Loans31

Allowance for Losses on Loans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reversal of loan losses	$ 1,650	$ 1,932	$ 3,150	$ 11,381
Charge-offs, net of (recoveries)	(2,897)	313
Loans receivable, gross	10,572,201		10,572,201			$ 9,823,270
Nonaccrual of interest	$ 47,349		$ 47,349			$ 67,810
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.73%		0.73%		0.90%	0.88%
Allowance for loan losses	$ 111,016	105,611	$ 111,016	105,611	$ 109,919	$ 106,829	$ 108,323	$ 114,591
Allowance for credit losses and reserve for unfunded commitments	$ 114,251		$ 114,251
Allowance for credit losses and reserve for unfunded commitments, percent of gross loans	1.08%		1.08%
Acquired loans subject to general allowance	$ 21,158		$ 21,158
Loans Collectively Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	9,438,408		9,438,408			8,963,453
Allowance for loan losses	110,119		110,119			106,554
Loans Individually Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	51,562		51,562			85,513
Allowance for loan losses	897		897			275
Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,235		3,235			3,085
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	36,707		36,707			59,074
Allowance for loan losses	40,681	$ 52,004	40,681	$ 52,004	41,828	47,347	$ 54,762	$ 62,763
Single-family residential | Loans Collectively Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	5,547,373		5,547,373			5,595,752
Allowance for loan losses	39,986		39,986			47,073
Single-family residential | Loans Individually Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	24,451		24,451			51,718
Allowance for loan losses	693		693			275
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 79,031		$ 79,031		$ 93,329	$ 128,577
Ratio of non-performing assets to total assets	0.53%		0.53%		0.64%	0.88%
Nonaccrual of interest	$ 47,349		$ 47,349		$ 54,559	$ 67,810
Non-Performing Loans | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 36,707		$ 36,707			$ 59,074

Allowance for Losses on Loans32

Allowance for Losses on Loans - Loans Evaluated for Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 111,016	$ 109,919	$ 106,829	$ 105,611	$ 108,323	$ 114,591
Loans receivable, gross	10,572,201		9,823,270
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	40,681	41,828	47,347	52,004	54,762	62,763
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	17,662	15,726	6,680	5,933	5,445	6,742
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,028	1,022	990	985	968	1,695
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	6,722	7,252	5,781	5,772	7,405	5,592
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,504	2,466	2,946	2,999	3,035	3,077
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	6,921	6,784	5,304	5,035	4,673	4,248
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	8,143	7,783	8,960	7,268	6,734	7,548
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	24,396	23,824	24,980	21,662	21,146	16,527
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	856	828	902	864	850	928
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	2,103	$ 2,406	2,939	$ 3,089	$ 3,305	$ 3,227
Loans Collectively Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	110,119		106,554
Loans receivable, gross	$ 9,438,408		$ 8,963,453
Ratio	1.20%		1.20%
Loans Collectively Evaluated for Impairment | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 39,986		$ 47,073
Loans receivable, gross	$ 5,547,373		$ 5,595,752
Ratio	0.70%		0.80%
Loans Collectively Evaluated for Impairment | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 17,662		$ 6,680
Loans receivable, gross	$ 442,437		$ 124,679
Ratio	4.00%		5.40%
Loans Collectively Evaluated for Impairment | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 1,027		$ 990
Loans receivable, gross	$ 211,215		$ 205,692
Ratio	0.50%		0.50%
Loans Collectively Evaluated for Impairment | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 6,710		$ 5,781
Loans receivable, gross	$ 87,099		$ 72,602
Ratio	7.70%		8.00%
Loans Collectively Evaluated for Impairment | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 2,504		$ 2,946
Loans receivable, gross	$ 90,983		$ 93,103
Ratio	2.80%		3.20%
Loans Collectively Evaluated for Impairment | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 6,911		$ 5,304
Loans receivable, gross	$ 1,091,709		$ 1,062,194
Ratio	0.60%		0.50%
Loans Collectively Evaluated for Impairment | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 7,963		$ 8,960
Loans receivable, gross	$ 848,187		$ 844,691
Ratio	0.90%		1.10%
Loans Collectively Evaluated for Impairment | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 24,397		$ 24,980
Loans receivable, gross	$ 832,429		$ 643,577
Ratio	2.90%		3.90%
Loans Collectively Evaluated for Impairment | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 856		$ 902
Loans receivable, gross	$ 132,869		$ 126,594
Ratio	0.60%		0.70%
Loans Collectively Evaluated for Impairment | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 2,103		$ 2,938
Loans receivable, gross	$ 154,107		$ 194,569
Ratio	1.40%		1.50%
Loans Individually Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 897		$ 275
Loans receivable, gross	$ 51,562		$ 85,513
Ratio	1.70%		0.30%
Loans Individually Evaluated for Impairment | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 693		$ 275
Loans receivable, gross	$ 24,451		$ 51,718
Ratio	2.80%		0.50%
Loans Individually Evaluated for Impairment | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0		$ 0
Loans receivable, gross	$ 0		$ 5,441
Ratio	0.00%		0.00%
Loans Individually Evaluated for Impairment | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0		$ 0
Loans receivable, gross	$ 1,125		$ 0
Ratio	0.00%		0.00%
Loans Individually Evaluated for Impairment | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 13		$ 0
Loans receivable, gross	$ 1,454		$ 2,198
Ratio	0.90%		0.00%
Loans Individually Evaluated for Impairment | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0		$ 0
Loans receivable, gross	$ 1,238		$ 10,824
Ratio	0.00%		0.00%
Loans Individually Evaluated for Impairment | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 11		$ 0
Loans receivable, gross	$ 1,513		$ 5,348
Ratio	0.70%		0.00%
Loans Individually Evaluated for Impairment | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 180		$ 0
Loans receivable, gross	$ 21,313		$ 8,826
Ratio	0.80%		0.00%
Loans Individually Evaluated for Impairment | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0		$ 0
Loans receivable, gross	$ 0		$ 0
Ratio	0.00%		0.00%
Loans Individually Evaluated for Impairment | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0		$ 0
Loans receivable, gross	$ 468		$ 1,072
Ratio	0.00%		0.00%
Loans Individually Evaluated for Impairment | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0		$ 0
Loans receivable, gross	$ 0		$ 86
Ratio	0.00%		0.00%

Allowance for Losses on Loans33

Allowance for Losses on Loans - Internally Assigned Grade (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 10,572,201	$ 9,823,270
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 10,371,828	$ 9,605,919
Total grade as a % of total net loans	98.10%	97.80%
Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 21,176	$ 6,721
Total grade as a % of total net loans	0.20%	0.10%
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 179,193	$ 210,630
Total grade as a % of total net loans	1.70%	2.10%
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 0	$ 0
Total grade as a % of total net loans	0.00%	0.00%
Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 4	$ 0
Total grade as a % of total net loans	0.00%	0.00%
Non-Acquired loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 10,303,150	$ 9,493,987
Non-Acquired loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	10,142,163	9,333,233
Non-Acquired loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	21,129	6,721
Non-Acquired loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	139,858	154,033
Non-Acquired loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Single-family residential
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	5,593,018	5,651,845
Non-Acquired loans | Single-family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	5,533,837	5,558,700
Non-Acquired loans | Single-family residential | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Single-family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	59,181	93,145
Non-Acquired loans | Single-family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Single-family residential | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Construction
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,016,305	200,509
Non-Acquired loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,012,203	197,935
Non-Acquired loans | Construction | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	4,102	2,574
Non-Acquired loans | Construction | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Construction | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Construction - custom
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	409,116	396,307
Non-Acquired loans | Construction - custom | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	408,538	396,307
Non-Acquired loans | Construction - custom | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Construction - custom | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	578	0
Non-Acquired loans | Construction - custom | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Construction - custom | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Land - acquisition & development
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	101,849	94,208
Non-Acquired loans | Land - acquisition & development | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	94,830	89,656
Non-Acquired loans | Land - acquisition & development | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Land - acquisition & development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	7,019	4,552
Non-Acquired loans | Land - acquisition & development | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Land - acquisition & development | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Land - consumer lot loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	101,731	103,989
Non-Acquired loans | Land - consumer lot loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	100,173	103,569
Non-Acquired loans | Land - consumer lot loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Land - consumer lot loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,558	420
Non-Acquired loans | Land - consumer lot loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Land - consumer lot loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Multi-family
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,094,736	1,125,722
Non-Acquired loans | Multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	1,087,363	1,118,673
Non-Acquired loans | Multi-family | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,252	865
Non-Acquired loans | Multi-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	4,121	6,184
Non-Acquired loans | Multi-family | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Multi-family | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	886,957	986,270
Non-Acquired loans | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	861,771	971,510
Non-Acquired loans | Commercial real estate | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	11,345	4,360
Non-Acquired loans | Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	13,841	10,400
Non-Acquired loans | Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Commercial real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Commercial & industrial
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	810,442	612,836
Non-Acquired loans | Commercial & industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	755,361	575,034
Non-Acquired loans | Commercial & industrial | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	6,532	1,496
Non-Acquired loans | Commercial & industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	48,549	36,306
Non-Acquired loans | Commercial & industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Commercial & industrial | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | HELOC
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	134,735	127,646
Non-Acquired loans | HELOC | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	133,939	127,398
Non-Acquired loans | HELOC | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | HELOC | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	796	248
Non-Acquired loans | HELOC | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | HELOC | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	154,261	194,655
Non-Acquired loans | Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	154,148	194,451
Non-Acquired loans | Consumer | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	113	204
Non-Acquired loans | Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-Acquired loans | Consumer | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-impaired acquired loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	140,369	166,293
Non-impaired acquired loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	132,710	149,891
Non-impaired acquired loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	47	0
Non-impaired acquired loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	7,612	16,402
Non-impaired acquired loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Non-impaired acquired loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Credit impaired acquired loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	96,491	87,081
Credit impaired acquired loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	65,106	61,019
Credit impaired acquired loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Credit impaired acquired loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	31,381	26,062
Credit impaired acquired loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Credit impaired acquired loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	4	0
Covered loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	32,191	75,909
Covered loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	31,849	61,776
Covered loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Covered loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	342	14,133
Covered loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Covered loans | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 0	$ 0

Allowance for Losses on Loans34

Allowance for Losses on Loans - Credit Risk Profile Based on Payment Activity (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 10,572,201		$ 9,823,270
Nonaccrual loans by portfolio segment	47,349		67,810
Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 10,255,801		$ 9,426,177
Total grade as a % of total net loans	99.50%		99.30%
Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 79,031	$ 93,329	$ 128,577
Nonaccrual loans by portfolio segment	$ 47,349	$ 54,559	$ 67,810
Grade as a percentage of total gross loans	0.50%		0.70%
Single-family residential
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 36,707		$ 59,074
Single-family residential | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 5,556,312		$ 5,592,771
Total grade as a % of total net loans	99.30%		99.00%
Single-family residential | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 36,707		$ 59,074
Grade as a percentage of total gross loans	0.70%		1.00%
Construction
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 0		$ 754
Construction | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 1,016,305		$ 199,755
Total grade as a % of total net loans	100.00%		99.60%
Construction | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 0		$ 754
Grade as a percentage of total gross loans	0.00%		0.40%
Construction - custom
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 506		$ 732
Construction - custom | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 408,610		$ 395,575
Total grade as a % of total net loans	99.90%		99.80%
Construction - custom | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 506		$ 732
Grade as a percentage of total gross loans	0.10%		0.20%
Land - acquisition & development
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 427		$ 0
Land - acquisition & development | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 101,422		$ 94,208
Total grade as a % of total net loans	99.60%		100.00%
Land - acquisition & development | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 427		$ 0
Grade as a percentage of total gross loans	0.40%		0.00%
Land - consumer lot loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 1,105		$ 1,273
Land - consumer lot loans | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 100,626		$ 102,716
Total grade as a % of total net loans	98.90%		98.80%
Land - consumer lot loans | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 1,105		$ 1,273
Grade as a percentage of total gross loans	1.10%		1.20%
Multi-family
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 1,238		$ 2,558
Multi-family | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 1,093,495		$ 1,123,165
Total grade as a % of total net loans	99.90%		99.80%
Multi-family | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 1,238		$ 2,558
Grade as a percentage of total gross loans	0.10%		0.20%
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 6,297		$ 2,176
Commercial real estate | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 880,661		$ 984,093
Total grade as a % of total net loans	99.30%		99.80%
Commercial real estate | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 6,297		$ 2,176
Grade as a percentage of total gross loans	0.70%		0.20%
Commercial & industrial
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 521		$ 0
Commercial & industrial | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 809,921		$ 612,836
Total grade as a % of total net loans	99.90%		100.00%
Commercial & industrial | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 521		$ 0
Grade as a percentage of total gross loans	0.10%		0.00%
HELOC
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 548		$ 563
HELOC | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 134,188		$ 127,083
Total grade as a % of total net loans	99.60%		99.60%
HELOC | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 548		$ 563
Grade as a percentage of total gross loans	0.40%		0.40%
Consumer
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 0		$ 680
Consumer | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 154,261		$ 193,975
Total grade as a % of total net loans	100.00%		99.70%
Consumer | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 0		$ 680
Grade as a percentage of total gross loans	0.00%		0.30%

Allowance for Losses on Loans35

Allowance for Losses on Loans - Impaired Loans Based on Loan Types (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2016	Sep. 30, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 276,538	$ 341,579
Unpaid Principal Balance	308,894	381,223
Related Allowance	4,406	6,678
Average Recorded Investment	275,273	333,815
Amount of related allowance included in specific reserves	897	275
Amount of related allowance included in general reserves	3,509	6,403
Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	18,402	38,866
Unpaid Principal Balance	40,363	70,564
Related Allowance	0	0
Average Recorded Investment	16,891	29,474
Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	258,136	302,713
Unpaid Principal Balance	268,531	310,659
Related Allowance	4,406	6,678
Average Recorded Investment	258,382	304,341
Single-family residential
Financing Receivable, Impaired [Line Items]
Recorded Investment	233,135	276,711
Unpaid Principal Balance	238,920	282,912
Related Allowance	4,202	6,678
Average Recorded Investment	232,765	274,097
Single-family residential | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,602	17,250
Unpaid Principal Balance	11,287	19,644
Related Allowance	0	0
Average Recorded Investment	8,491	14,069
Single-family residential | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	223,533	259,461
Unpaid Principal Balance	227,633	263,268
Related Allowance	4,202	6,678
Average Recorded Investment	224,274	260,028
Construction
Financing Receivable, Impaired [Line Items]
Recorded Investment		5,441
Unpaid Principal Balance		7,929
Related Allowance		0
Average Recorded Investment		5,903
Construction | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment		453
Unpaid Principal Balance		2,151
Related Allowance		0
Average Recorded Investment		471
Construction | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment		4,988
Unpaid Principal Balance		5,778
Related Allowance		0
Average Recorded Investment		5,432
Construction - custom
Financing Receivable, Impaired [Line Items]
Recorded Investment	578	554
Unpaid Principal Balance	578	554
Related Allowance	0	0
Average Recorded Investment	289	182
Construction - custom | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	578	554
Unpaid Principal Balance	578	554
Related Allowance	0	0
Average Recorded Investment	289	182
Land - acquisition & development
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,618	5,056
Unpaid Principal Balance	11,049	12,852
Related Allowance	8	0
Average Recorded Investment	1,707	4,404
Land - acquisition & development | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	164	2,570
Unpaid Principal Balance	8,393	9,426
Related Allowance	0	0
Average Recorded Investment	164	926
Land - acquisition & development | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,454	2,486
Unpaid Principal Balance	2,656	3,426
Related Allowance	8	0
Average Recorded Investment	1,543	3,478
Land - consumer lot loans
Financing Receivable, Impaired [Line Items]
Recorded Investment	10,322	12,016
Unpaid Principal Balance	11,481	12,368
Related Allowance	5	0
Average Recorded Investment	10,347	11,868
Land - consumer lot loans | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	650	727
Unpaid Principal Balance	747	814
Related Allowance	0	0
Average Recorded Investment	599	544
Land - consumer lot loans | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	9,672	11,289
Unpaid Principal Balance	10,734	11,554
Related Allowance	5	0
Average Recorded Investment	9,748	11,324
Multi-family
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,941	7,593
Unpaid Principal Balance	5,690	10,877
Related Allowance	11	0
Average Recorded Investment	2,254	5,277
Multi-family | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	428	3,770
Unpaid Principal Balance	4,177	7,054
Related Allowance	0	0
Average Recorded Investment	736	1,545
Multi-family | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,513	3,823
Unpaid Principal Balance	1,513	3,823
Related Allowance	11	0
Average Recorded Investment	1,518	3,732
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	26,163	28,551
Unpaid Principal Balance	30,904	36,698
Related Allowance	180	0
Average Recorded Investment	25,513	27,016
Commercial real estate | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	5,673	9,427
Unpaid Principal Balance	6,588	15,620
Related Allowance	0	0
Average Recorded Investment	5,697	8,130
Commercial real estate | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	20,490	19,124
Unpaid Principal Balance	24,316	21,078
Related Allowance	180	0
Average Recorded Investment	19,816	18,886
Commercial & industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment	906	2,955
Unpaid Principal Balance	7,627	13,066
Related Allowance	0	0
Average Recorded Investment	544	2,681
Commercial & industrial | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	906	2,955
Unpaid Principal Balance	7,627	13,066
Related Allowance	0	0
Average Recorded Investment	544	2,681
HELOC
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,747	2,126
Unpaid Principal Balance	1,877	2,975
Related Allowance	0	0
Average Recorded Investment	1,742	1,895
HELOC | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	368	683
Unpaid Principal Balance	483	1,532
Related Allowance	0	0
Average Recorded Investment	354	536
HELOC | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,379	1,443
Unpaid Principal Balance	1,394	1,443
Related Allowance	0	0
Average Recorded Investment	1,388	1,359
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	128	576
Unpaid Principal Balance	768	992
Related Allowance	0	0
Average Recorded Investment	112	492
Consumer | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	33	477
Unpaid Principal Balance	483	703
Related Allowance	0	0
Average Recorded Investment	17	390
Consumer | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	95	99
Unpaid Principal Balance	285	289
Related Allowance	0	0
Average Recorded Investment	$ 95	$ 102

Fair Value Measurements - Recu

Fair Value Measurements - Recurring and Nonrecurring (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 1,969,869		$ 1,969,869		$ 2,380,563
Total financial assets	3,482,535		3,482,535		4,017,983
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	1,969,869		1,969,869		2,380,563
Interest rate contracts	22,085		22,085		11,879
Total financial assets	1,991,954		1,991,954		2,392,442
Total financial liabilities	61,012		61,012		27,400
Recurring | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	22,085		22,085		11,879
Recurring | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	3,394		3,394		966
Recurring | Long term borrowing hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	35,533		35,533		14,555
Recurring | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	101,885		101,885		101,952
Recurring | Obligations of U.S. government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	249,053		249,053		482,464
Recurring | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	27,488		27,488		27,123
Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	460,399		460,399		505,800
Recurring | Agency pass-through certificates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	1,046,506		1,046,506		1,160,518
Recurring | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	84,538		84,538		102,706
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	101,885		101,885		101,952
Interest rate contracts	0		0		0
Total financial assets	101,885		101,885		101,952
Total financial liabilities	0		0		0
Recurring | Level 1 | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	0		0		0
Recurring | Level 1 | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	0		0		0
Recurring | Level 1 | Long term borrowing hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	0		0		0
Recurring | Level 1 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	101,885		101,885		101,952
Recurring | Level 1 | Obligations of U.S. government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 1 | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 1 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 1 | Agency pass-through certificates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 1 | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	1,867,984		1,867,984		2,278,611
Interest rate contracts	22,085		22,085		11,879
Total financial assets	1,890,069		1,890,069		2,290,490
Total financial liabilities	61,012		61,012		27,400
Recurring | Level 2 | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	22,085		22,085		11,879
Recurring | Level 2 | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	3,394		3,394		966
Recurring | Level 2 | Long term borrowing hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	35,533		35,533		14,555
Recurring | Level 2 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 2 | Obligations of U.S. government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	249,053		249,053		482,464
Recurring | Level 2 | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	27,488		27,488		27,123
Recurring | Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	460,399		460,399		505,800
Recurring | Level 2 | Agency pass-through certificates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	1,046,506		1,046,506		1,160,518
Recurring | Level 2 | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	84,538		84,538		102,706
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Interest rate contracts	0		0		0
Total financial assets	0		0		0
Total financial liabilities	0		0		0
Recurring | Level 3 | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	0		0		0
Recurring | Level 3 | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	0		0		0
Recurring | Level 3 | Long term borrowing hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	0		0		0
Recurring | Level 3 | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 3 | Obligations of U.S. government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 3 | Obligations of states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 3 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 3 | Agency pass-through certificates
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		0
Recurring | Level 3 | Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		0		$ 0
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	35,577	$ 80,516	35,577	$ 80,516
Nonrecurring | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss related to impaired loans and real estate held for sale, measured on nonrecurring basis	(1,306)	(5,987)	(6,706)	4,202
Nonrecurring | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	15,724	6,735	15,724	6,735
Nonrecurring | Impaired loans | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss related to impaired loans and real estate held for sale, measured on nonrecurring basis	(692)	(3,621)	(3,762)	(4,201)
Nonrecurring | Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	19,853	73,781	19,853	73,781
Nonrecurring | Real Estate Owned | Changes Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loss related to impaired loans and real estate held for sale, measured on nonrecurring basis	(614)	(2,366)	(2,944)	8,403
Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0	0	0
Nonrecurring | Level 1 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0	0	0
Nonrecurring | Level 1 | Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0	0	0
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0	0	0
Nonrecurring | Level 2 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0	0	0
Nonrecurring | Level 2 | Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0	0	0
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	35,577	80,516	35,577	80,516
Nonrecurring | Level 3 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	15,724	6,735	15,724	6,735
Nonrecurring | Level 3 | Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	$ 19,853	$ 73,781	$ 19,853	$ 73,781

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	$ 1,969,869	$ 2,380,563
FHLB and FRB stock	117,205	107,198
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	1,969,869	2,380,563
Held-to-maturity securities	1,492,480	1,643,216
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	1,969,869	2,380,563
Held-to-maturity securities	1,512,666	1,637,420
Level 1 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	530,055	284,049
Level 1 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	530,055	284,049
Level 1 | Equity securities | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	101,885	101,952
Level 1 | Equity securities | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	101,885	101,952
Level 2 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
FHLB and FRB stock	117,205	107,198
Other assets - interest rate contracts	22,085	11,879
Customer accounts	10,578,916	10,631,703
FHLB advances	2,080,000	1,830,000
Level 2 | Carrying Amount | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	22,085	11,879
Level 2 | Carrying Amount | Commercial loan hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	3,394	966
Level 2 | Carrying Amount | Long term borrowing hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	35,533	14,555
Level 2 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
FHLB and FRB stock	117,205	107,198
Other assets - interest rate contracts	22,085	11,879
Customer accounts	10,182,610	10,004,290
FHLB advances	2,211,686	1,938,384
Level 2 | Estimated Fair Value | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	22,085	11,879
Level 2 | Estimated Fair Value | Commercial loan hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	3,394	966
Level 2 | Estimated Fair Value | Long term borrowing hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	35,533	14,555
Level 2 | Agency pass-through certificates | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	1,492,480	1,643,216
Level 2 | Agency pass-through certificates | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	1,512,666	1,637,420
Level 2 | Obligations of U.S. government | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	249,053	482,464
Level 2 | Obligations of U.S. government | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	249,053	482,464
Level 2 | Obligations of states and political subdivisions | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	27,488	27,123
Level 2 | Obligations of states and political subdivisions | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	27,488	27,123
Level 2 | Corporate debt securities | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	460,399	505,800
Level 2 | Corporate debt securities | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	460,399	505,800
Level 2 | Agency pass-through certificates | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	1,046,506	1,160,518
Level 2 | Agency pass-through certificates | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	1,046,506	1,160,518
Level 2 | Commercial MBS | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	84,538	102,706
Level 2 | Commercial MBS | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	84,538	102,706
Level 3 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	9,628,576	9,170,634
FDIC indemnification asset	13,250	16,275
Level 3 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	10,206,509	9,667,750
FDIC indemnification asset	$ 12,633	$ 15,522

Fair Value Measurements - Inve

Fair Value Measurements - Investments by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Amortized Cost, Available-for-sale securities
Amortized Cost	$ 1,959,164	$ 2,365,450
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains	24,304	28,158
Gross unrealized loss	(13,599)	(13,045)
Fair Value, Available-for-sale securities
Available-for-sale securities, at fair value	$ 1,969,869	$ 2,380,563
Yield, Available-for-sale securities
Yield	2.17%	1.97%
Yield, Held-to-maturity securities
Investments	$ 3,451,644	$ 4,008,666
Gross unrealized gains on investments	45,068	38,674
Gross unrealized losses on investments	(14,177)	(29,357)
Total financial assets	$ 3,482,535	$ 4,017,983
Yield on investments	2.60%	2.46%
Obligations of U.S. government
Amortized Cost, Available-for-sale securities
Within 1 year	$ 25,980
1 to 5 years	13,268	$ 105,065
5 to 10 years	49,174	119,071
Over 10 years	165,032	262,832
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Within 1 year	0
Gross unrealized gains, 1 to 5 years	1,273	1,923
Gross unrealized gains, 5 to 10 years	0	35
Gross unrealized gains, Over 10 years	0	0
Gross unrealized losses, Within 1 year	(65)
Gross unrealized losses, 1 to 5 years	(23)	(274)
Gross unrealized losses, 5 to 10 years	(1,526)	(1,247)
Gross unrealized losses, Over 10 years	(4,060)	(4,941)
Fair Value, Available-for-sale securities
Within 1 year	25,915
1 to 5 years	14,518	106,714
5 to 10 years	47,648	117,859
Over 10 years	$ 160,972	$ 257,891
Yield, Available-for-sale securities
Within 1 year	0.73%
1 to 5 years	7.49%	1.74%
5 to 10 years	1.06%	1.54%
Over 10 years	1.14%	1.23%
Equity securities
Amortized Cost, Available-for-sale securities
Within 1 year	$ 500	$ 500
1 to 5 years	99,922	99,922
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Within 1 year	22	17
Gross unrealized gains, 1 to 5 years	1,441	1,513
Gross unrealized losses, Within 1 year	0	0
Gross unrealized losses, 1 to 5 years	0	0
Fair Value, Available-for-sale securities
Within 1 year	522	517
1 to 5 years	$ 101,363	$ 101,435
Yield, Available-for-sale securities
Within 1 year	1.80%	1.80%
1 to 5 years	1.90%	1.90%
Corporate debt securities
Amortized Cost, Available-for-sale securities
Within 1 year	$ 250,000	$ 24,787
1 to 5 years	71,540	311,435
5 to 10 years	89,954	100,000
Over 10 years	50,000	69,950
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Within 1 year	263	191
Gross unrealized gains, 1 to 5 years	148	1,190
Gross unrealized gains, 5 to 10 years	518	876
Gross unrealized gains, Over 10 years	875	953
Gross unrealized losses, Within 1 year	0	0
Gross unrealized losses, 1 to 5 years	(106)	(58)
Gross unrealized losses, 5 to 10 years	(2,793)	(3,524)
Gross unrealized losses, Over 10 years	0	0
Fair Value, Available-for-sale securities
Within 1 year	250,263	24,978
1 to 5 years	71,582	312,567
5 to 10 years	87,679	97,352
Over 10 years	$ 50,875	$ 70,903
Yield, Available-for-sale securities
Within 1 year	1.07%	0.53%
1 to 5 years	1.97%	0.88%
5 to 10 years	2.02%	1.47%
Over 10 years	3.00%	3.00%
Municipal bonds due
Amortized Cost, Available-for-sale securities
1 to 5 years	$ 2,307	$ 2,285
5 to 10 years	1,327	1,303
Over 10 years	20,367	20,382
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, 1 to 5 years	18	8
Gross unrealized gains, 5 to 10 years	65	7
Gross unrealized gains, Over 10 years	3,404	3,138
Gross unrealized losses, 1 to 5 years	0	0
Gross unrealized losses, 5 to 10 years	0	0
Gross unrealized losses, Over 10 years	0	0
Fair Value, Available-for-sale securities
1 to 5 years	2,325	2,293
5 to 10 years	1,392	1,310
Over 10 years	$ 23,771	$ 23,520
Yield, Available-for-sale securities
1 to 5 years	1.23%	1.23%
5 to 10 years	2.05%	2.05%
Over 10 years	6.45%	6.45%
Agency pass-through certificates
Amortized Cost, Available-for-sale securities
Without single maturity date	$ 1,033,736	$ 1,144,787
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Without single maturity date	16,277	18,222
Gross unrealized losses, Without single maturity date	(3,507)	(2,491)
Fair Value, Available-for-sale securities
Without single maturity date	$ 1,046,506	$ 1,160,518
Yield, Available-for-sale securities
Without single maturity date	2.58%	2.48%
Amortized Cost, Held-to-maturity securities
Without single maturity date	$ 1,492,480	$ 1,643,216
Gross Unrealized Gains / Losses, Held-to-maturity securities
Gross unrealized gains, Without single maturity date	20,764	10,516
Gross unrealized losses, Without single maturity date	(578)	(16,312)
Fair Value, Held-to-maturity securities
Without single maturity date	$ 1,512,666	$ 1,637,420
Yield, Held-to-maturity securities
Without a single maturity date	3.18%	3.19%
Commercial MBS
Amortized Cost, Available-for-sale securities
Without single maturity date	$ 86,057	$ 103,131
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Without single maturity date	0	85
Gross unrealized losses, Without single maturity date	(1,519)	(510)
Fair Value, Available-for-sale securities
Without single maturity date	$ 84,538	$ 102,706
Yield, Available-for-sale securities
Without single maturity date	1.79%	1.51%

Fair Value Measurements - Addi

Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Proceeds from sale of available-for-sale securities, net	$ 0	$ 235,110,000	$ 0	$ 235,110,000
Gross realized gain (loss) on AFS		$ 9,639,000		$ 9,639,000
Term of contractual due dates of substantially all mortgage-backed securities (in years)			10 years

Fair Value Measurements - Secu

Fair Value Measurements - Securities in Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Sep. 30, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	$ (5,622)	$ (6,229)
Less than 12 months, fair value	513,643	578,646
12 months or more, unrealized gross losses	(8,555)	(23,128)
12 months or more, fair value	559,111	1,297,408
Total unrealized gross losses	(14,177)	(29,357)
Total, fair value	1,072,754	1,876,054
Corporate bonds due
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	(512)	(183)
Less than 12 months, fair value	19,442	72,862
12 months or more, unrealized gross losses	(2,387)	(3,399)
12 months or more, fair value	57,613	46,601
Total unrealized gross losses	(2,899)	(3,582)
Total, fair value	77,055	119,463
U.S. government and agency securities due
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	(3,199)	(5,010)
Less than 12 months, fair value	122,397	336,243
12 months or more, unrealized gross losses	(2,475)	(1,452)
12 months or more, fair value	116,082	57,344
Total unrealized gross losses	(5,674)	(6,462)
Total, fair value	238,479	393,587
Agency pass-through certificates
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	(1,911)	(1,036)
Less than 12 months, fair value	371,804	169,541
12 months or more, unrealized gross losses	(3,693)	(18,277)
12 months or more, fair value	385,416	1,193,463
Total unrealized gross losses	(5,604)	(19,313)
Total, fair value	$ 757,220	$ 1,363,004

Derivatives and Hedging Activ41

Derivatives and Hedging Activities (Details) - USD ($)	9 Months Ended
	Jun. 30, 2016	Sep. 30, 2015
Derivative [Line Items]
Gain (loss) on derivative instruments	$ 0
Derivative asset, fair value, gross asset	22,085,000	$ 11,879,000
Derivative liability, fair value, gross liability	61,012,000	27,400,000
Interest rate swap agreements
Derivative [Line Items]
Customer derivatives program	557,930,000	439,416,000
Notional amount	54,155,000	54,815,000
Interest rate swap agreements | Forward Contracts
Derivative [Line Items]
Notional amount	700,000,000	400,000,000
Long term borrowing hedge | Other assets
Derivative [Line Items]
Derivative asset, fair value, gross asset	0	0
Long term borrowing hedge | Other liabilities
Derivative [Line Items]
Derivative liability, fair value, gross liability	35,533,000	14,555,000
Interest rate contracts | Other assets
Derivative [Line Items]
Derivative asset, fair value, gross asset	22,085,000	11,879,000
Interest rate contracts | Other liabilities
Derivative [Line Items]
Derivative liability, fair value, gross liability	22,085,000	11,879,000
Commercial loan hedge | Other assets
Derivative [Line Items]
Derivative asset, fair value, gross asset	0	0
Commercial loan hedge | Other liabilities
Derivative [Line Items]
Derivative liability, fair value, gross liability	$ 3,394,000	$ 966,000