Washington Federal (WAFD) 10-Q 8 Feb 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Dec. 31, 2015	Feb. 03, 2016
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
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		91,563,241

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
ASSETS
Cash and cash equivalents	$ 305,959	$ 284,049
Available-for-sale securities, at fair value	2,304,788	2,380,563
Held-to-maturity securities, at amortized cost	1,598,370	1,643,216
Loans receivable, net	9,402,730	9,170,634
Interest receivable	38,259	40,429
Premises and equipment, net	288,796	276,247
Real estate owned	42,098	61,098
FHLB and FRB stock	111,107	107,198
Bank owned life insurance	103,281	102,496
Intangible assets, including goodwill of $291,503	298,719	299,358
Federal and state income tax assets, net	716	14,513
Other assets	190,076	188,523
Assets	14,684,899	14,568,324
Customer accounts
Transaction deposit accounts	5,924,084	5,820,878
Time deposit accounts	4,727,035	4,810,825
Customer accounts	10,651,119	10,631,703
FHLB advances	1,928,000	1,830,000
Advance payments by borrowers for taxes and insurance	21,747	50,224
Accrued expenses and other liabilities	113,793	100,718
Liabilities	12,714,659	12,612,645
Stockholders’ equity
Common stock, $1.00 par value, 300,000,000 shares authorized; 134,100,924 and 133,695,803 shares issued; 92,918,434 and 92,936,395 shares outstanding	134,101	133,696
Paid-in capital	1,649,529	1,643,712
Accumulated other comprehensive income (loss), net of taxes	(4,432)	353
Treasury stock, at cost; 41,182,490 and 40,759,408 shares	(661,774)	(651,836)
Retained earnings	852,816	829,754
Stockholders' Equity Attributable to Parent	1,970,240	1,955,679
Liabilities and Equity	$ 14,684,899	$ 14,568,324

CONSOLIDATED STATEMENTS OF FIN3

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2015	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)	134,100,924	133,695,803
Common stock, shares outstanding (in shares)	92,918,434	92,936,595
Treasury stock, shares (in shares)	41,182,490	40,759,708

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
INTEREST INCOME
Loans	$ 112,863	$ 108,293
Mortgage-backed securities	16,987	19,175
Investment securities and cash equivalents	5,274	5,273
Interest Income	135,124	132,741
INTEREST EXPENSE
Customer accounts	12,717	13,445
FHLB advances and other borrowings	15,538	17,113
Interest Expense	28,255	30,558
Net interest income	106,869	102,183
Provision for (reversal of) allowance for loan losses	0	(5,500)
Net interest income after reversal of provision for loan losses	106,869	107,683
OTHER INCOME
Loan fee income	1,517	2,065
Deposit fee income	5,917	5,977
Other income (expense)	3,201	(2,662)
Noninterest income	10,635	5,380
OTHER EXPENSE
Compensation and benefits	29,699	29,160
Occupancy	8,592	8,135
FDIC insurance premiums	2,589	674
Product delivery	5,523	5,627
Information technology	8,710	4,030
Other expense	9,396	5,974
Noninterest Expense	64,509	53,600
Gain on real estate acquired through foreclosure, net	1,420	315
Income before income taxes	54,415	59,778
Income tax provision	19,317	21,371
NET INCOME	$ 35,098	$ 38,407
PER SHARE DATA
Basic earnings (in dollars per share)	$ 0.38	$ 0.39
Diluted earnings (in dollars per share)	0.38	0.39
Dividends paid on common stock (in dollars per share)	$ 0.13	$ 0.15
Basic weighted average number of shares outstanding (in shares)	92,986,358	98,147,939
Diluted weighted average number of shares outstanding, including dilutive stock options (in shares)	93,577,837	98,524,839

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 35,098	$ 38,407
Other comprehensive income (loss) net of tax:
Net unrealized gain (loss) on available-for-sale securities	(10,360)	8,560
Related tax benefit (expense)	3,807	(3,146)
Other comprehensive income (loss) for available for sale securities, net of tax	(6,553)	5,414
Net unrealized gain (loss) on long-term borrowing hedge	2,795	(4,249)
Related tax benefit (expense)	(1,027)	1,562
Other comprehensive income (loss) on long term borrowing hedge, net of tax	1,768	(2,687)
Other comprehensive income (loss) net of tax	(4,785)	2,727
Comprehensive income	$ 30,313	$ 41,134

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	38,407			38,407
Other comprehensive income (loss)	2,727				2,727
Dividends on common stock	(10,159)			(10,159)
Compensation expense related to common stock options	300		300
Proceeds from exercise of common stock options	266	18	248
Restricted stock expense	841	250	591
Treasury stock acquired	(24,326)					(24,326)
Balance, end of period at Dec. 31, 2014	1,981,339	133,591	1,639,350	734,397	23,435	(549,434)
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	35,098			35,098
Other comprehensive income (loss)	(4,785)				(4,785)
Dividends on common stock	(12,036)			(12,036)
Compensation expense related to common stock options	300		300
Proceeds from exercise of common stock options	5,042	227	4,815
Restricted stock expense	880	178	702
Treasury stock acquired	(9,938)					(9,938)
Balance, end of period at Dec. 31, 2015	$ 1,970,240	$ 134,101	$ 1,649,529	$ 852,816	$ (4,432)	$ (661,774)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 35,098	$ 38,407
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	2,934	5,299
Cash received from (paid to) FDIC under loss share	1,975	(431)
Stock option compensation expense	300	300
Provision for (reversal of) allowance for loan losses	0	(5,500)
Gain on investment securities and real estate held for sale	(2,310)	(9,606)
Decrease in accrued interest receivable	2,170	11,280
Decrease in federal and state income tax receivable	16,577	19,208
Increase in cash surrender value of bank owned life insurance	(785)	(216)
Increase in other assets	(3,754)	(14,552)
Increase (decrease) in accrued expenses and other liabilities	15,870	(25,890)
Net cash provided by operating activities	68,075	18,299
CASH FLOWS FROM INVESTING ACTIVITIES
Origination of loans and principal repayments, net	(179,768)	(36,993)
Loans purchased	(51,646)	(46,831)
FHLB & FRB stock purchased	(6,809)	0
FHLB & FRB stock redemption	2,901	3,969
Available-for-sale securities purchased	(50,741)	(41,225)
Principal payments and maturities of available-for-sale securities	114,764	202,760
Principal payments and maturities of held-to-maturity securities	43,569	31,178
Proceeds from sales of real estate owned	26,664	17,909
Purchase of bank owned life insurance	0	(100,000)
Premises and equipment purchased and REO improvements	(17,183)	(2,019)
Net cash provided by (used in) investing activities	(118,249)	28,748
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in customer accounts	19,492	(137,999)
Proceeds from borrowings	204,000	0
Repayments of borrowings	(106,000)	(100,000)
Proceeds from exercise of common stock options and related tax benefit	5,042	266
Dividends paid on common stock	(12,036)	(14,359)
Treasury stock purchased	(9,938)	(24,326)
Decrease in advance payments by borrowers for taxes and insurance	(28,476)	(9,703)
Net cash provided by (used in) financing activities	72,084	(286,121)
Increase (decrease) in cash and cash equivalents	21,910	(239,074)
Cash and cash equivalents at beginning of period	284,049	781,843
Cash and cash equivalents at end of period	305,959	542,769
Non-cash investing activities
Real estate acquired through foreclosure	5,308	8,852
Covered real estate acquired through foreclosure	0	51
Cash paid during the period for
Interest	29,195	34,653
Income taxes	$ 8	$ 23

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Dec. 31, 2015
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 Form10-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 $923,891,000 and $816,014,000 at December 31, 2015 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	3 Months Ended
	Dec. 31, 2015
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements In January 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure . The new guidance clarifies that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either: (a) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure; or (b) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. ASU 2014-04 is effective for annual and interim reporting periods within those annual periods, beginning after December 15, 2014. The Company's adoption of this guidance did not have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs . These amendments require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. These amendments are effective for interim and annual periods beginning after December 15, 2015 and early adoption is permitted. ASU 2015-03 may be applied retrospectively in previously issued financial statements for one or more years with a cumulative-effect adjustment to retained earnings. 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 . 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. On April 15, 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 are 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. On September 25, 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement-Period Adjustments . the amendments in ASU 2015-16 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.

Dividends and Share Repurchases

Dividends and Share Repurchases	3 Months Ended
	Dec. 31, 2015
Dividends [Abstract]
Dividends and Share Repurchases	Dividends and Share Repurchases On January 20, 2016, the Company announced its 132nd consecutive quarterly cash dividend on common stock of $0.14 per share. The current dividend will be paid on February 12, 2016, to common shareholders of record on February 1, 2016. Dividends per share were $ 0.13 and $ 0.15 for the quarters ended December 31, 2015 and 2014 , respectively. For the three months ended December 31, 2015 , the Company repurchased 423,082 shares at an average price of $23.49 . For the three months ended December 31, 2014, the Company repurchased 1,116,147 shares at an average price of $21.79 . There are 3,778,148 remaining shares that can be repurchased under the current Board approved program.

Loans Receivable

Loans Receivable	3 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Loans Receivable	Loans Receivable The following table is a summary of loans receivable (including LIP, net of charge offs.) December 31, 2015 September 30, 2015 (In thousands) (In thousands) Non-Acquired loans Single-family residential $ 5,629,715 55.7 % $ 5,651,845 57.5 % Construction 660,238 6.5 200,509 2.0 Construction - custom 404,849 4.0 396,307 4.0 Land - acquisition & development 97,025 1.0 94,208 1.0 Land - consumer lot loans 102,376 1.0 103,989 1.1 Multi-family 997,696 9.9 1,125,722 11.5 Commercial real estate 839,157 8.3 986,270 10.0 Commercial & industrial 751,073 7.4 612,836 6.2 HELOC 127,919 1.3 127,646 1.3 Consumer 181,142 1.8 194,655 2.0 Total non-acquired loans 9,791,190 96.9 % 9,493,987 96.6 % Acquired loans 164,380 1.6 166,293 1.7 Credit impaired acquired loans 116,030 1.1 87,081 0.9 Covered loans 38,584 0.4 75,909 0.8 Total gross loans 10,110,184 100.0 % 9,823,270 100.0 % Less: Allowance for probable losses 107,901 106,829 Loans in process 535,850 476,796 Discount on acquired loans 25,040 30,095 Deferred net origination fees 38,663 38,916 Total loan contra accounts 707,454 652,636 Net Loans $ 9,402,730 $ 9,170,634 The following table sets forth information regarding non-accrual loans. December 31, 2015 September 30, 2015 (In thousands) Non-accrual loans: Single-family residential $ 43,856 77.3 % $ 59,074 87.1 % Construction — — 754 1.1 % Construction - custom 2,518 4.4 732 1.1 % Land - acquisition & development 509 0.9 — — % Land - consumer lot loans 939 1.7 1,273 1.9 % Multi-family 1,538 2.7 2,558 3.8 % Commercial real estate 6,681 11.8 2,176 3.2 % Commercial & industrial 115 0.2 — — % HELOC 473 0.8 563 0.8 % Consumer 119 0.2 680 1.0 % Total non-accrual loans $ 56,748 100 % $ 67,810 100 % The Company recognized interest income on nonaccrual loans of approximately $1,257,000 in the three months ended December 31, 2015 . Had these loans performed according to their original contract terms, the Company would have recognized interest income of approximately $687,000 for the three months ended December 31, 2015 . The recognized interest income includes more than three months of interest for some of the loans that were brought current. The following tables provide details regarding delinquent loans. December 31, 2015 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of LIP & Chg.-Offs Current 30 60 90 Total (In thousands) Non-acquired loans Single-Family Residential $ 5,644,009 $ 5,576,774 $ 17,285 $ 9,939 $ 40,010 $ 67,234 1.19 % Construction 325,485 324,619 560 306 — 866 0.27 Construction - Custom 221,327 218,773 28 9 2,518 2,554 1.15 Land - Acquisition & Development 85,830 84,805 387 — 638 1,025 1.19 Land - Consumer Lot Loans 102,887 100,224 828 897 938 2,663 2.59 Multi-Family 966,921 965,110 1,196 — 615 1,811 0.19 Commercial Real Estate 929,495 920,582 841 1,933 6,139 8,913 0.96 Commercial & Industrial 756,831 754,611 2,219 1 — 2,220 0.29 HELOC 125,479 124,883 19 19 558 595 0.47 Consumer 181,431 179,977 882 352 221 1,454 0.80 9,339,695 9,250,358 24,245 13,456 51,637 89,335 0.96 Acquired loans 140,995 140,137 193 16 649 858 0.61 Credit impaired acquired loans 55,060 52,806 854 — 1,400 2,254 4.09 Covered loans 38,584 37,062 501 295 726 1,522 3.94 Total Loans $ 9,574,334 $ 9,480,363 $ 25,793 $ 13,767 $ 54,412 $ 93,969 0.98 % Delinquency % 99.02% 0.27% 0.14% 0.57% 0.98% September 30, 2015 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of LIP & Chg.-Offs 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 increased from 0.88% as of September 30, 2015 to 0.98% as of December 31, 2015 . The following table provides information related to loans that were restructured in at TDR during the periods presented: Quarter Ended December 31, 2015 2014 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 3 $ 729 $ 729 35 $ 9,600 $ 9,600 Construction — — — 2 718 718 Land - consumer lot loans — — — 2 532 532 Commercial real estate 5 965 965 — — — Consumer — — — 1 85 85 8 $ 1,694 $ 1,694 40 $ 10,935 $ 10,935 The following table provides 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. Quarter Ended December 31, 2015 2014 Number of Recorded Number of Recorded Contracts Investment Contracts Investment (In thousands) (In thousands) TDRs That Subsequently Defaulted: Single-family residential 5 $ 668 8 $ 1,431 Land - consumer lot loans 1 148 3 389 6 $ 816 11 $ 1,820 Most loans restructured in troubled debt restructurings ("TDRs") are accruing and performing loans where the borrower has proactively approached the Company about modification due to temporary financial difficulties. As of December 31, 2015 , 96.6% of the Bank's $282,723,000 in TDRs were classified as performing. Each request is individually evaluated for merit and likelihood of success. The concession for these loans is typically a payment reduction through a rate reduction of between 100 to 200 basis points for a specific term, usually six to twelve months. Interest-only payments may also be approved during the modification period. Principal forgiveness is not an available option for restructured loans. As of December 31, 2015 , single-family residential loans comprised 86.1% 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). Quarter Ended December 31, 2015 Fiscal 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 nonaccretable — — — — 6,307 — 346 — Accretion (5,526 ) 5,526 (857 ) 857 (30,727 ) 30,727 (7,655 ) 7,655 Transfers to REO — — — — — (2,975 ) — (150 ) Payments received, net — (7,680 ) — (3,790 ) — (52,278 ) — (96,287 ) Ending Balance $ 67,179 $ 109,146 $ 6,347 $ 184,147 $ 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. Additionally, as of December 31, 2015 the Company has $1,700,000 remaining in loans it acquired during fiscal 2013 as part of the South Valley Bank acquisition for which it was probable at acquisition that all contractually required payments would not be collected. The timing and amount of future cash flows cannot not be reasonably estimated; therefore, these loan are accounted for on a cash basis. At December 31, 2015 and September 30, 2015 , none of the acquired impaired or non-impaired loans were classified as non-performing assets. Therefore, interest income, through accretion of the difference between the carrying amount of the loans and the expected cash flows, was recognized on all acquired loans. Covered loans were $38,584,000 at December 31, 2015 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: Three Months Ended December 31, 2015 Fiscal Year Ended September 30, 2015 (In thousands) Balance at beginning of period $ 16,275 $ 36,860 Additions — (1,795 ) Payments received (1,974 ) (720 ) Amortization (287 ) (18,588 ) Accretion 62 518 Balance at end of period $ 14,076 $ 16,275

Allowance for Losses on Loans

Allowance for Losses on Loans	3 Months Ended
	Dec. 31, 2015
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 December 31, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 47,347 $ (1,139 ) $ 2,466 $ (918 ) $ 47,756 Construction 6,680 — 155 179 7,014 Construction - custom 990 (60 ) — 132 1,062 Land - acquisition & development 5,781 — 35 962 6,778 Land - consumer lot loans 2,946 (408 ) — 463 3,001 Multi-family 5,304 — — (257 ) 5,047 Commercial real estate 8,960 (23 ) 123 1,284 10,344 Commercial & industrial 24,980 (248 ) 1 (637 ) 24,096 HELOC 902 (1 ) 21 (102 ) 820 Consumer 2,939 (242 ) 392 (1,106 ) 1,983 $ 106,829 $ (2,121 ) $ 3,193 $ — $ 107,901 Fiscal Year Ended September 30, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 62,763 $ (5,524 ) $ 13,403 $ (23,295 ) $ 47,347 Construction 6,742 (388 ) $ 120 206 6,680 Construction - custom 1,695 — — (705 ) 990 Land - acquisition & development 5,592 (38 ) 207 20 5,781 Land - consumer lot loans 3,077 (459 ) 221 107 2,946 Multi-family 4,248 — 220 836 5,304 Commercial real estate 7,548 (1,711 ) 735 2,388 8,960 Commercial & industrial 16,527 (3,354 ) 1,374 10,433 24,980 HELOC 928 (66 ) 2 38 902 Consumer 3,227 (3,060 ) 3,688 (916 ) 2,939 Covered loans 2,244 — — (2,244 ) — $ 114,591 $ (14,600 ) $ 19,970 $ (13,132 ) $ 106,829 There was no provision for loan losses recorded for the three months ended December 31, 2015 , which compares to a reversal of provision of $5,500,000 for the three months ended December 31, 2014 . The lack of provision for the quarter ended December 31, 2015 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 $1,072,000 for the quarter ended December 31, 2015 , compared with $842,000 of net recoveries for the same quarter one year ago. Non-performing assets amounted to $98,846,000 , or 0.67% , of total assets at December 31, 2015 , compared to $164,317,000 , or 1.13% of total assets at December 31, 2014 . Non-accrual loans decreased from $98,353,000 at December 31, 2014 , to $56,748,000 at December 31, 2015 , a 42.3% decrease. The percentage of delinquent loans decreased from 1.47% at December 31, 2014 , to 0.98% at December 31, 2015 . The reserve for unfunded commitments was $3,085,000 as of December 31, 2015 , which is unchanged since September 30, 2015 . Management believes the allowance for loan losses plus the reserve for unfunded commitments, totaling $110,986,000 , or 1.10% of gross loans, is sufficient to absorb estimated losses inherent in the portfolio. 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 December 31, 2015 , $25,223,000 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. December 31, 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 $ 47,625 $ 5,614,580 0.8 % $ 130 $ 14,206 0.9 % Construction 7,014 121,689 5.8 — — — Construction - custom 1,062 218,749 0.5 — 2,578 — Land - acquisition & development 6,778 77,223 8.8 — 6,649 — Land - consumer lot loans 3,001 91,664 3.3 — 10,658 — Multi-family 5,048 1,085,243 0.5 — 3,500 — Commercial real estate 10,344 939,248 1.1 — 9,811 — Commercial & industrial 24,096 776,240 3.1 — 27 — HELOC 820 126,596 0.6 — 1,310 — Consumer 1,983 180,814 1.1 — 328 — $ 107,771 $ 9,232,046 1.2 % $ 130 $ 49,067 0.3 % (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 December 31, 2015 , $107,771,000 of the allowance was calculated under the formulas contained in our general allowance methodology and the remaining $130,000 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 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. December 31, 2015 Internally Assigned Grade Pass Special mention Substandard Doubtful Loss Total Gross Loans (In thousands) Non-acquired loans Single-family residential $ 5,551,785 $ — $ 77,930 $ — $ — $ 5,629,715 Construction 655,964 4,274 — — — 660,238 Construction - custom 402,000 — 2,849 — — 404,849 Land - acquisition & development 87,772 5,627 3,626 — — 97,025 Land - consumer lot loans 100,125 — 2,251 — — 102,376 Multi-family 997,696 — — — — 997,696 Commercial real estate 813,974 8,111 17,073 — — 839,157 Commercial & industrial 713,240 3,058 34,775 — — 751,073 HELOC 127,198 — 721 — — 127,919 Consumer 180,892 — 250 — — 181,142 9,630,645 21,070 139,475 — — 9,791,190 Non-impaired acquired loans 152,761 — 11,619 — — 164,380 Credit-impaired acquired loans 79,555 199 36,276 — — 116,030 Covered loans 37,555 — 1,029 — — 38,584 Total gross loans $ 9,900,516 $ 21,269 $ 188,399 $ — $ — $ 10,110,184 Total grade as a % of total gross loans 97.9 % 0.2 % 1.9 % — % — % 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. December 31, 2015 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) Single-family residential $ 5,585,859 99.2 % $ 43,856 0.8 % Construction 660,238 100.0 — — Construction - custom 402,331 99.4 2,518 0.6 Land - acquisition & development 96,516 99.5 509 0.5 Land - consumer lot loans 101,437 99.1 939 0.9 Multi-family 996,158 99.8 1,538 0.2 Commercial real estate 832,476 99.2 6,681 0.8 Commercial & industrial 750,958 100.0 115 — HELOC 127,446 99.6 473 0.4 Consumer 181,023 99.9 119 0.1 $ 9,734,442 99.4 % $ 56,748 0.6 % 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. December 31, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) With no related allowance recorded: Single-family residential $ 14,791 $ 16,304 $ — $ 12,837 Construction — — — — Construction - custom 1,182 1,182 — 868 Land - acquisition & development 542 8,630 — 1,327 Land - consumer lot loans 510 527 — 427 Multi-family 761 4,754 — 1,117 Commercial real estate 7,331 8,671 — 4,686 Commercial & industrial 953 6,687 — 948 HELOC 262 631 — 245 Consumer 479 479 — 385 26,811 47,865 — 22,840 With an allowance recorded: Single-family residential 246,210 249,530 6,339 246,922 Construction — — — — Construction - custom — — — — Land - acquisition & development 2,101 3,303 — 2,294 Land - consumer lot loans 11,080 11,345 — 11,120 Multi-family 2,430 2,435 — 2,437 Commercial real estate 23,802 27,168 — 24,042 Commercial & industrial — — — — HELOC 1,393 1,393 — 1,393 Consumer 97 286 — 98 287,113 295,460 6,339 (1) 288,306 Total: Single-family residential 261,001 265,834 6,339 259,759 Construction — — — — Construction - custom 1,182 1,182 — 868 Land - acquisition & development 2,643 11,933 — 3,621 Land - consumer lot loans 11,590 11,872 — 11,547 Multi-family 3,191 7,189 — 3,554 Commercial real estate 31,133 35,839 — 28,728 Commercial & industrial 953 6,687 — 948 HELOC 1,655 2,024 — 1,638 Consumer 576 765 — 483 $ 313,924 $ 343,325 $ 6,339 (1) $ 311,146 (1) Includes $130,000 of specific reserves and $6,209,000 included in the general reserves. September 30, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) 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 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: 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	3 Months Ended
	Dec. 31, 2015
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. Most securities at fair value are priced using model pricing based on the securities' relationship to other benchmark quoted prices as provided by an independent third party, and under the provisions of the Fair Value Measurements and Disclosures topic of the FASB Accounting Standards Codification are considered a Level 2 input method. Securities that are traded on active exchanges 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. December 31, 2015 Level 1 Level 2 Level 3 Total (In thousands) Financial Assets Available-for-sale securities: Equity securities $ 101,558 — — $ 101,558 Obligations of U.S. government — 425,814 — 425,814 Obligations of states and political subdivisions — 27,232 — 27,232 Corporate debt securities — 505,406 — 505,406 Mortgage-backed securities — Agency pass-through certificates — 1,149,087 — 1,149,087 Other Commercial MBS — 95,691 — 95,691 Total available-for-sale securities 101,558 2,203,230 — 2,304,788 Interest rate contracts — 9,656 — 9,656 Total financial assets $ 101,558 $ 2,212,886 $ — $ 2,314,444 Financial Liabilities Interest rate contracts $ — $ 9,656 $ — $ 9,656 Commercial loan hedge — 565 — 565 Long term borrowing hedge — 11,759 — 11,759 Total financial liabilities $ — $ 21,980 $ — $ 21,980 There were no transfers between, into and/or out of Levels 1, 2 or 3 during the quarter ended December 31, 2015 . 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 Other 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 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 held for sale 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 held for sale as Level 3. Level 3 assets recorded at fair value on a nonrecurring basis at December 31, 2015 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 covered REO and real estate held for sale for which fair value of the properties 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 December 31, 2015 and December 31, 2014 , and the total losses (gains) resulting from those fair value adjustments for the three months ended December 31, 2015 and December 31, 2014 . The estimated fair value measurements are shown gross of estimated selling costs. Three Months Ended December 31, 2015 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 8,524 $ 8,524 $ (1,681 ) Real estate owned (2) — — 7,145 7,145 (1,755 ) Balance at end of period $ — $ — $ 15,669 $ 15,669 $ (3,436 ) (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate held for sale. Three Months Ended December 31, 2014 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 146 $ 146 $ (64 ) Real estate owned (2) — — 37,942 37,942 8,237 Balance at end of period $ — $ — $ 38,088 $ 38,088 $ 8,173 (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate held for sale. 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 collateral 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 ("REO") - When a loan is reclassified from loan status to real estate held for sale 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 or up 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. December 31, 2015 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 $ 305,959 $ 305,959 $ 284,049 $ 284,049 Available-for-sale securities Equity securities 1 101,558 101,558 101,952 101,952 Obligations of U.S. government 2 425,814 425,814 482,464 482,464 Obligations of states and political subdivisions 2 27,232 27,232 27,123 27,123 Corporate debt securities 2 505,406 505,406 505,800 505,800 Mortgage-backed securities Agency pass-through certificates 2 1,149,087 1,149,087 1,160,518 1,160,518 Other commercial MBS 2 95,691 95,691 102,706 102,706 Total available-for-sale securities 2,304,788 2,304,788 2,380,563 2,380,563 Held-to-maturity securities 2 Mortgage-backed securities Agency pass-through certificates 2 1,598,370 1,571,288 1,643,216 1,637,420 Total held-to-maturity securities 1,598,370 1,571,288 1,643,216 1,637,420 Loans receivable 3 9,402,730 9,901,403 9,170,634 9,667,750 FDIC indemnification asset 3 14,076 13,271 16,275 15,522 FHLB and FRB stock 2 111,107 111,107 107,198 107,198 Other assets - interest rate contracts 2 9,656 9,656 11,879 11,879 Financial liabilities Customer accounts 2 10,651,119 9,920,280 10,631,703 10,004,290 FHLB advances 2 1,928,000 2,012,603 1,830,000 1,938,384 Other liabilities - interest rate contracts 2 9,656 9,656 11,879 11,879 Other liabilities - commercial loan hedge 2 565 565 966 966 Other liabilities - long term borrowing hedge 2 11,759 11,759 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 forward starting 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. December 31, 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 $ 99,907 $ 1,600 $ (593 ) $ 100,914 1.89 % 5 to 10 years 76,604 — (1,852 ) 74,752 1.35 Over 10 years 254,886 100 (4,838 ) 250,148 1.34 Equity Securities Within 1 year 500 11 — 511 1.80 1 to 5 years 99,922 1,124 — 101,046 1.90 5 to 10 years — — — — — Corporate bonds due Within 1 year 24,872 103 — 24,975 0.57 1 to 5 years 341,470 839 (108 ) 342,201 1.20 5 to 10 years 89,952 558 (3,030 ) 87,480 1.80 Over 10 years 50,000 750 — 50,750 3.00 Municipal bonds due 1 to 5 years 2,292 3 — 2,295 1.23 5 to 10 years 1,311 18 — 1,329 2.05 Over 10 years 20,377 3,230 — 23,607 6.45 Mortgage-backed securities Agency pass-through certificates 1,141,558 11,636 (4,105 ) 1,149,089 2.56 Other Commercial MBS 96,383 18 (710 ) 95,691 1.58 2,300,034 19,990 (15,236 ) 2,304,788 2.07 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,598,370 5,638 (32,719 ) 1,571,289 3.19 $ 3,898,404 $ 25,628 $ (47,955 ) $ 3,876,077 2.53 % 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 Other 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 quarter ended December 31, 2015 or the quarter ended December 31, 2014 . 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 December 31, 2015 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. December 31, 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 $ (108 ) $ 32,986 $ (3,030 ) $ 46,970 $ (3,138 ) $ 79,956 U.S. government and agency securities due (5,062 ) 243,329 (2,221 ) 109,611 (7,283 ) 352,940 Agency pass-through certificates (3,181 ) 636,155 (34,354 ) 1,266,121 (37,535 ) 1,902,276 $ (8,351 ) $ 912,470 $ (39,605 ) $ 1,422,702 $ (47,956 ) $ 2,335,172 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	3 Months Ended
	Dec. 31, 2015
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 $ 474,900,000 and $439,416,000 notional in interest rate swaps to hedge this exposure as of December 31, 2015 and September 30, 2015 , respectively. The interest rate swaps are derivatives under 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 three months ended December 31, 2015 as the changes in value for the asset and liability side of the swaps offset each other. The Bank has also entered into forward-starting interest rate swaps to convert future short-term borrowings to fixed rate payments. The primary purpose of this hedge 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 FASB ASC 815, which provides for matching 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 future short-term fixed rate borrowings over the term of the interest rate swap. Prior to the starting date, the change in the fair value of the interest rate swap is recorded in other comprehensive income. The Bank had $400,000,000 notional in forward starting interest rate swaps to hedge future borrowing rates as of December 31, 2015 and September 30, 2015 . The impact on accumulated other comprehensive income as of December 31, 2015 was an after-tax gain of $1,768,000 . 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 FASB ASC 815, which provides for matching of the recognition of gains and losses of the interest rate swap and the hedged item. The Bank had $54,155,000 and $54,815,000 notional in interest rate swap to hedge this loan as of December 31, 2015 and September 30, 2015 , respectively The following table presents the fair value and balance sheet classification of derivatives at December 31, 2015 and September 30, 2015 : Asset Derivatives Liability Derivatives December 31, 2015 September 30, 2015 December 31, 2015 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 $ 9,656 Other assets $ 11,879 Other liabilities $ 9,656 Other liabilities $ 11,879 Commercial loan hedge Other assets — Other assets — Other liabilities 565 Other liabilities 966 Long term borrowing hedge Other assets — Other assets — Other liabilities 11,759 Other liabilities 14,555 $ 9,656 $ 11,879 $ 21,980 $ 27,400

Summary of Significant Accoun15

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Dec. 31, 2015
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 January 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure . The new guidance clarifies that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either: (a) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure; or (b) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. ASU 2014-04 is effective for annual and interim reporting periods within those annual periods, beginning after December 15, 2014. The Company's adoption of this guidance did not have a material impact on its consolidated financial statements. In April 2015, the FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs . These amendments require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. These amendments are effective for interim and annual periods beginning after December 15, 2015 and early adoption is permitted. ASU 2015-03 may be applied retrospectively in previously issued financial statements for one or more years with a cumulative-effect adjustment to retained earnings. 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 . 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. On April 15, 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 are 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. On September 25, 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement-Period Adjustments . the amendments in ASU 2015-16 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.

Loans Receivable (Tables)

Loans Receivable (Tables)	3 Months Ended
	Dec. 31, 2015
Receivables [Abstract]
Schedule of Loans Receivable	The following table is a summary of loans receivable (including LIP, net of charge offs.) December 31, 2015 September 30, 2015 (In thousands) (In thousands) Non-Acquired loans Single-family residential $ 5,629,715 55.7 % $ 5,651,845 57.5 % Construction 660,238 6.5 200,509 2.0 Construction - custom 404,849 4.0 396,307 4.0 Land - acquisition & development 97,025 1.0 94,208 1.0 Land - consumer lot loans 102,376 1.0 103,989 1.1 Multi-family 997,696 9.9 1,125,722 11.5 Commercial real estate 839,157 8.3 986,270 10.0 Commercial & industrial 751,073 7.4 612,836 6.2 HELOC 127,919 1.3 127,646 1.3 Consumer 181,142 1.8 194,655 2.0 Total non-acquired loans 9,791,190 96.9 % 9,493,987 96.6 % Acquired loans 164,380 1.6 166,293 1.7 Credit impaired acquired loans 116,030 1.1 87,081 0.9 Covered loans 38,584 0.4 75,909 0.8 Total gross loans 10,110,184 100.0 % 9,823,270 100.0 % Less: Allowance for probable losses 107,901 106,829 Loans in process 535,850 476,796 Discount on acquired loans 25,040 30,095 Deferred net origination fees 38,663 38,916 Total loan contra accounts 707,454 652,636 Net Loans $ 9,402,730 $ 9,170,634
Summary of Information Regarding Non-Accrual Loans	The following table sets forth information regarding non-accrual loans. December 31, 2015 September 30, 2015 (In thousands) Non-accrual loans: Single-family residential $ 43,856 77.3 % $ 59,074 87.1 % Construction — — 754 1.1 % Construction - custom 2,518 4.4 732 1.1 % Land - acquisition & development 509 0.9 — — % Land - consumer lot loans 939 1.7 1,273 1.9 % Multi-family 1,538 2.7 2,558 3.8 % Commercial real estate 6,681 11.8 2,176 3.2 % Commercial & industrial 115 0.2 — — % HELOC 473 0.8 563 0.8 % Consumer 119 0.2 680 1.0 % Total non-accrual loans $ 56,748 100 % $ 67,810 100 %
Analysis of Age of Loans in Past Due Status	The following tables provide details regarding delinquent loans. December 31, 2015 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of LIP & Chg.-Offs Current 30 60 90 Total (In thousands) Non-acquired loans Single-Family Residential $ 5,644,009 $ 5,576,774 $ 17,285 $ 9,939 $ 40,010 $ 67,234 1.19 % Construction 325,485 324,619 560 306 — 866 0.27 Construction - Custom 221,327 218,773 28 9 2,518 2,554 1.15 Land - Acquisition & Development 85,830 84,805 387 — 638 1,025 1.19 Land - Consumer Lot Loans 102,887 100,224 828 897 938 2,663 2.59 Multi-Family 966,921 965,110 1,196 — 615 1,811 0.19 Commercial Real Estate 929,495 920,582 841 1,933 6,139 8,913 0.96 Commercial & Industrial 756,831 754,611 2,219 1 — 2,220 0.29 HELOC 125,479 124,883 19 19 558 595 0.47 Consumer 181,431 179,977 882 352 221 1,454 0.80 9,339,695 9,250,358 24,245 13,456 51,637 89,335 0.96 Acquired loans 140,995 140,137 193 16 649 858 0.61 Credit impaired acquired loans 55,060 52,806 854 — 1,400 2,254 4.09 Covered loans 38,584 37,062 501 295 726 1,522 3.94 Total Loans $ 9,574,334 $ 9,480,363 $ 25,793 $ 13,767 $ 54,412 $ 93,969 0.98 % Delinquency % 99.02% 0.27% 0.14% 0.57% 0.98% September 30, 2015 Amount of Loans Days Delinquent Based on $ Amount of Loans % based on $ Type of Loan Net of LIP & Chg.-Offs 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 table provides information related to loans that were restructured in at TDR during the periods presented: Quarter Ended December 31, 2015 2014 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 3 $ 729 $ 729 35 $ 9,600 $ 9,600 Construction — — — 2 718 718 Land - consumer lot loans — — — 2 532 532 Commercial real estate 5 965 965 — — — Consumer — — — 1 85 85 8 $ 1,694 $ 1,694 40 $ 10,935 $ 10,935
Schedule of Loan Modifications	The following table provides 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. Quarter Ended December 31, 2015 2014 Number of Recorded Number of Recorded Contracts Investment Contracts Investment (In thousands) (In thousands) TDRs That Subsequently Defaulted: Single-family residential 5 $ 668 8 $ 1,431 Land - consumer lot loans 1 148 3 389 6 $ 816 11 $ 1,820
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). Quarter Ended December 31, 2015 Fiscal 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 nonaccretable — — — — 6,307 — 346 — Accretion (5,526 ) 5,526 (857 ) 857 (30,727 ) 30,727 (7,655 ) 7,655 Transfers to REO — — — — — (2,975 ) — (150 ) Payments received, net — (7,680 ) — (3,790 ) — (52,278 ) — (96,287 ) Ending Balance $ 67,179 $ 109,146 $ 6,347 $ 184,147 $ 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: Three Months Ended December 31, 2015 Fiscal Year Ended September 30, 2015 (In thousands) Balance at beginning of period $ 16,275 $ 36,860 Additions — (1,795 ) Payments received (1,974 ) (720 ) Amortization (287 ) (18,588 ) Accretion 62 518 Balance at end of period $ 14,076 $ 16,275

Allowance for Losses on Loans (

Allowance for Losses on Loans (Tables)	3 Months Ended
	Dec. 31, 2015
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 December 31, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 47,347 $ (1,139 ) $ 2,466 $ (918 ) $ 47,756 Construction 6,680 — 155 179 7,014 Construction - custom 990 (60 ) — 132 1,062 Land - acquisition & development 5,781 — 35 962 6,778 Land - consumer lot loans 2,946 (408 ) — 463 3,001 Multi-family 5,304 — — (257 ) 5,047 Commercial real estate 8,960 (23 ) 123 1,284 10,344 Commercial & industrial 24,980 (248 ) 1 (637 ) 24,096 HELOC 902 (1 ) 21 (102 ) 820 Consumer 2,939 (242 ) 392 (1,106 ) 1,983 $ 106,829 $ (2,121 ) $ 3,193 $ — $ 107,901 Fiscal Year Ended September 30, 2015 Beginning Allowance Charge-offs Recoveries Provision & Transfers Ending Allowance (In thousands) Single-family residential $ 62,763 $ (5,524 ) $ 13,403 $ (23,295 ) $ 47,347 Construction 6,742 (388 ) $ 120 206 6,680 Construction - custom 1,695 — — (705 ) 990 Land - acquisition & development 5,592 (38 ) 207 20 5,781 Land - consumer lot loans 3,077 (459 ) 221 107 2,946 Multi-family 4,248 — 220 836 5,304 Commercial real estate 7,548 (1,711 ) 735 2,388 8,960 Commercial & industrial 16,527 (3,354 ) 1,374 10,433 24,980 HELOC 928 (66 ) 2 38 902 Consumer 3,227 (3,060 ) 3,688 (916 ) 2,939 Covered loans 2,244 — — (2,244 ) — $ 114,591 $ (14,600 ) $ 19,970 $ (13,132 ) $ 106,829
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. December 31, 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 $ 47,625 $ 5,614,580 0.8 % $ 130 $ 14,206 0.9 % Construction 7,014 121,689 5.8 — — — Construction - custom 1,062 218,749 0.5 — 2,578 — Land - acquisition & development 6,778 77,223 8.8 — 6,649 — Land - consumer lot loans 3,001 91,664 3.3 — 10,658 — Multi-family 5,048 1,085,243 0.5 — 3,500 — Commercial real estate 10,344 939,248 1.1 — 9,811 — Commercial & industrial 24,096 776,240 3.1 — 27 — HELOC 820 126,596 0.6 — 1,310 — Consumer 1,983 180,814 1.1 — 328 — $ 107,771 $ 9,232,046 1.2 % $ 130 $ 49,067 0.3 % (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. December 31, 2015 Internally Assigned Grade Pass Special mention Substandard Doubtful Loss Total Gross Loans (In thousands) Non-acquired loans Single-family residential $ 5,551,785 $ — $ 77,930 $ — $ — $ 5,629,715 Construction 655,964 4,274 — — — 660,238 Construction - custom 402,000 — 2,849 — — 404,849 Land - acquisition & development 87,772 5,627 3,626 — — 97,025 Land - consumer lot loans 100,125 — 2,251 — — 102,376 Multi-family 997,696 — — — — 997,696 Commercial real estate 813,974 8,111 17,073 — — 839,157 Commercial & industrial 713,240 3,058 34,775 — — 751,073 HELOC 127,198 — 721 — — 127,919 Consumer 180,892 — 250 — — 181,142 9,630,645 21,070 139,475 — — 9,791,190 Non-impaired acquired loans 152,761 — 11,619 — — 164,380 Credit-impaired acquired loans 79,555 199 36,276 — — 116,030 Covered loans 37,555 — 1,029 — — 38,584 Total gross loans $ 9,900,516 $ 21,269 $ 188,399 $ — $ — $ 10,110,184 Total grade as a % of total gross loans 97.9 % 0.2 % 1.9 % — % — % 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. December 31, 2015 Performing Loans Non-Performing Loans Amount % of Total Gross Loans Amount % of Total Gross Loans (In thousands) Single-family residential $ 5,585,859 99.2 % $ 43,856 0.8 % Construction 660,238 100.0 — — Construction - custom 402,331 99.4 2,518 0.6 Land - acquisition & development 96,516 99.5 509 0.5 Land - consumer lot loans 101,437 99.1 939 0.9 Multi-family 996,158 99.8 1,538 0.2 Commercial real estate 832,476 99.2 6,681 0.8 Commercial & industrial 750,958 100.0 115 — HELOC 127,446 99.6 473 0.4 Consumer 181,023 99.9 119 0.1 $ 9,734,442 99.4 % $ 56,748 0.6 % 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. December 31, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) With no related allowance recorded: Single-family residential $ 14,791 $ 16,304 $ — $ 12,837 Construction — — — — Construction - custom 1,182 1,182 — 868 Land - acquisition & development 542 8,630 — 1,327 Land - consumer lot loans 510 527 — 427 Multi-family 761 4,754 — 1,117 Commercial real estate 7,331 8,671 — 4,686 Commercial & industrial 953 6,687 — 948 HELOC 262 631 — 245 Consumer 479 479 — 385 26,811 47,865 — 22,840 With an allowance recorded: Single-family residential 246,210 249,530 6,339 246,922 Construction — — — — Construction - custom — — — — Land - acquisition & development 2,101 3,303 — 2,294 Land - consumer lot loans 11,080 11,345 — 11,120 Multi-family 2,430 2,435 — 2,437 Commercial real estate 23,802 27,168 — 24,042 Commercial & industrial — — — — HELOC 1,393 1,393 — 1,393 Consumer 97 286 — 98 287,113 295,460 6,339 (1) 288,306 Total: Single-family residential 261,001 265,834 6,339 259,759 Construction — — — — Construction - custom 1,182 1,182 — 868 Land - acquisition & development 2,643 11,933 — 3,621 Land - consumer lot loans 11,590 11,872 — 11,547 Multi-family 3,191 7,189 — 3,554 Commercial real estate 31,133 35,839 — 28,728 Commercial & industrial 953 6,687 — 948 HELOC 1,655 2,024 — 1,638 Consumer 576 765 — 483 $ 313,924 $ 343,325 $ 6,339 (1) $ 311,146 (1) Includes $130,000 of specific reserves and $6,209,000 included in the general reserves. September 30, 2015 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment (In thousands) 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 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: 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 reser

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Dec. 31, 2015
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. December 31, 2015 Level 1 Level 2 Level 3 Total (In thousands) Financial Assets Available-for-sale securities: Equity securities $ 101,558 — — $ 101,558 Obligations of U.S. government — 425,814 — 425,814 Obligations of states and political subdivisions — 27,232 — 27,232 Corporate debt securities — 505,406 — 505,406 Mortgage-backed securities — Agency pass-through certificates — 1,149,087 — 1,149,087 Other Commercial MBS — 95,691 — 95,691 Total available-for-sale securities 101,558 2,203,230 — 2,304,788 Interest rate contracts — 9,656 — 9,656 Total financial assets $ 101,558 $ 2,212,886 $ — $ 2,314,444 Financial Liabilities Interest rate contracts $ — $ 9,656 $ — $ 9,656 Commercial loan hedge — 565 — 565 Long term borrowing hedge — 11,759 — 11,759 Total financial liabilities $ — $ 21,980 $ — $ 21,980 There were no transfers between, into and/or out of Levels 1, 2 or 3 during the quarter ended December 31, 2015 . 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 Other 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 December 31, 2015 and December 31, 2014 , and the total losses (gains) resulting from those fair value adjustments for the three months ended December 31, 2015 and December 31, 2014 . The estimated fair value measurements are shown gross of estimated selling costs. Three Months Ended December 31, 2015 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 8,524 $ 8,524 $ (1,681 ) Real estate owned (2) — — 7,145 7,145 (1,755 ) Balance at end of period $ — $ — $ 15,669 $ 15,669 $ (3,436 ) (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate held for sale. Three Months Ended December 31, 2014 Level 1 Level 2 Level 3 Total Total Gains (Losses) (In thousands) Impaired loans (1) $ — $ — $ 146 $ 146 $ (64 ) Real estate owned (2) — — 37,942 37,942 8,237 Balance at end of period $ — $ — $ 38,088 $ 38,088 $ 8,173 (1) The gains (losses) represent remeasurements of collateral-dependent loans. (2) The gains (losses) represent aggregate writedowns and charge-offs on real estate held for sale.
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. December 31, 2015 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 $ 305,959 $ 305,959 $ 284,049 $ 284,049 Available-for-sale securities Equity securities 1 101,558 101,558 101,952 101,952 Obligations of U.S. government 2 425,814 425,814 482,464 482,464 Obligations of states and political subdivisions 2 27,232 27,232 27,123 27,123 Corporate debt securities 2 505,406 505,406 505,800 505,800 Mortgage-backed securities Agency pass-through certificates 2 1,149,087 1,149,087 1,160,518 1,160,518 Other commercial MBS 2 95,691 95,691 102,706 102,706 Total available-for-sale securities 2,304,788 2,304,788 2,380,563 2,380,563 Held-to-maturity securities 2 Mortgage-backed securities Agency pass-through certificates 2 1,598,370 1,571,288 1,643,216 1,637,420 Total held-to-maturity securities 1,598,370 1,571,288 1,643,216 1,637,420 Loans receivable 3 9,402,730 9,901,403 9,170,634 9,667,750 FDIC indemnification asset 3 14,076 13,271 16,275 15,522 FHLB and FRB stock 2 111,107 111,107 107,198 107,198 Other assets - interest rate contracts 2 9,656 9,656 11,879 11,879 Financial liabilities Customer accounts 2 10,651,119 9,920,280 10,631,703 10,004,290 FHLB advances 2 1,928,000 2,012,603 1,830,000 1,938,384 Other liabilities - interest rate contracts 2 9,656 9,656 11,879 11,879 Other liabilities - commercial loan hedge 2 565 565 966 966 Other liabilities - long term borrowing hedge 2 11,759 11,759 14,555 14,555 The following table presents the fair value and balance sheet classification of derivatives at December 31, 2015 and September 30, 2015 : Asset Derivatives Liability Derivatives December 31, 2015 September 30, 2015 December 31, 2015 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 $ 9,656 Other assets $ 11,879 Other liabilities $ 9,656 Other liabilities $ 11,879 Commercial loan hedge Other assets — Other assets — Other liabilities 565 Other liabilities 966 Long term borrowing hedge Other assets — Other assets — Other liabilities 11,759 Other liabilities 14,555 $ 9,656 $ 11,879 $ 21,980 $ 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. December 31, 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 $ 99,907 $ 1,600 $ (593 ) $ 100,914 1.89 % 5 to 10 years 76,604 — (1,852 ) 74,752 1.35 Over 10 years 254,886 100 (4,838 ) 250,148 1.34 Equity Securities Within 1 year 500 11 — 511 1.80 1 to 5 years 99,922 1,124 — 101,046 1.90 5 to 10 years — — — — — Corporate bonds due Within 1 year 24,872 103 — 24,975 0.57 1 to 5 years 341,470 839 (108 ) 342,201 1.20 5 to 10 years 89,952 558 (3,030 ) 87,480 1.80 Over 10 years 50,000 750 — 50,750 3.00 Municipal bonds due 1 to 5 years 2,292 3 — 2,295 1.23 5 to 10 years 1,311 18 — 1,329 2.05 Over 10 years 20,377 3,230 — 23,607 6.45 Mortgage-backed securities Agency pass-through certificates 1,141,558 11,636 (4,105 ) 1,149,089 2.56 Other Commercial MBS 96,383 18 (710 ) 95,691 1.58 2,300,034 19,990 (15,236 ) 2,304,788 2.07 Held-to-maturity securities Mortgage-backed securities Agency pass-through certificates 1,598,370 5,638 (32,719 ) 1,571,289 3.19 $ 3,898,404 $ 25,628 $ (47,955 ) $ 3,876,077 2.53 % 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 Other 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 December 31, 2015 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. December 31, 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 $ (108 ) $ 32,986 $ (3,030 ) $ 46,970 $ (3,138 ) $ 79,956 U.S. government and agency securities due (5,062 ) 243,329 (2,221 ) 109,611 (7,283 ) 352,940 Agency pass-through certificates (3,181 ) 636,155 (34,354 ) 1,266,121 (37,535 ) 1,902,276 $ (8,351 ) $ 912,470 $ (39,605 ) $ 1,422,702 $ (47,956 ) $ 2,335,172 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)	3 Months Ended
	Dec. 31, 2015
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. December 31, 2015 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 $ 305,959 $ 305,959 $ 284,049 $ 284,049 Available-for-sale securities Equity securities 1 101,558 101,558 101,952 101,952 Obligations of U.S. government 2 425,814 425,814 482,464 482,464 Obligations of states and political subdivisions 2 27,232 27,232 27,123 27,123 Corporate debt securities 2 505,406 505,406 505,800 505,800 Mortgage-backed securities Agency pass-through certificates 2 1,149,087 1,149,087 1,160,518 1,160,518 Other commercial MBS 2 95,691 95,691 102,706 102,706 Total available-for-sale securities 2,304,788 2,304,788 2,380,563 2,380,563 Held-to-maturity securities 2 Mortgage-backed securities Agency pass-through certificates 2 1,598,370 1,571,288 1,643,216 1,637,420 Total held-to-maturity securities 1,598,370 1,571,288 1,643,216 1,637,420 Loans receivable 3 9,402,730 9,901,403 9,170,634 9,667,750 FDIC indemnification asset 3 14,076 13,271 16,275 15,522 FHLB and FRB stock 2 111,107 111,107 107,198 107,198 Other assets - interest rate contracts 2 9,656 9,656 11,879 11,879 Financial liabilities Customer accounts 2 10,651,119 9,920,280 10,631,703 10,004,290 FHLB advances 2 1,928,000 2,012,603 1,830,000 1,938,384 Other liabilities - interest rate contracts 2 9,656 9,656 11,879 11,879 Other liabilities - commercial loan hedge 2 565 565 966 966 Other liabilities - long term borrowing hedge 2 11,759 11,759 14,555 14,555 The following table presents the fair value and balance sheet classification of derivatives at December 31, 2015 and September 30, 2015 : Asset Derivatives Liability Derivatives December 31, 2015 September 30, 2015 December 31, 2015 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 $ 9,656 Other assets $ 11,879 Other liabilities $ 9,656 Other liabilities $ 11,879 Commercial loan hedge Other assets — Other assets — Other liabilities 565 Other liabilities 966 Long term borrowing hedge Other assets — Other assets — Other liabilities 11,759 Other liabilities 14,555 $ 9,656 $ 11,879 $ 21,980 $ 27,400

Summary of Significant Accoun20

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans in process	$ 535,850	$ 476,796
Loans and Leases Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans in process	$ 923,891	$ 816,014

Dividends and Share Repurchas21

Dividends and Share Repurchases (Details) - $ / shares	Jan. 20, 2016	Dec. 31, 2015	Dec. 31, 2014
Dividends Payable [Line Items]
Cash dividends per share (in dollars per share)		$ 0.13	$ 0.15
Stock repurchased (in shares)		423,082	1,116,147
Average cost per share (in dollars per share)		$ 23.49	$ 21.79
Remaining shares authorized to be repurchased (in shares)		3,778,148
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	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 10,110,184	$ 9,823,270
Ratio of type of loan to total loans receivable	100.00%	100.00%
Allowance for probable losses	$ 107,901	$ 106,829	$ 114,591
Loans in process	535,850	476,796
Discount on acquired loans	25,040	30,095
Deferred net origination fees	38,663	38,916
Charges against loans receivable	707,454	652,636
Loans receivable, net	9,402,730	9,170,634
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	47,756	47,347	62,763
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	7,014	6,680	6,742
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	1,062	990	1,695
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	6,778	5,781	5,592
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	3,001	2,946	3,077
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	5,047	5,304	4,248
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	10,344	8,960	7,548
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	24,096	24,980	16,527
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	820	902	928
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	1,983	2,939	$ 3,227
Non-Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 9,791,190	$ 9,493,987
Ratio of type of loan to total loans receivable	96.90%	96.60%
Non-Acquired loans | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 5,629,715	$ 5,651,845
Ratio of type of loan to total loans receivable	55.70%	57.50%
Non-Acquired loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 660,238	$ 200,509
Ratio of type of loan to total loans receivable	6.50%	2.00%
Non-Acquired loans | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 404,849	$ 396,307
Ratio of type of loan to total loans receivable	4.00%	4.00%
Non-Acquired loans | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 97,025	$ 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	$ 102,376	$ 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	$ 997,696	$ 1,125,722
Ratio of type of loan to total loans receivable	9.90%	11.50%
Non-Acquired loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 839,157	$ 986,270
Ratio of type of loan to total loans receivable	8.30%	10.00%
Non-Acquired loans | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 751,073	$ 612,836
Ratio of type of loan to total loans receivable	7.40%	6.20%
Non-Acquired loans | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 127,919	$ 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	$ 181,142	$ 194,655
Ratio of type of loan to total loans receivable	1.80%	2.00%
Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 164,380	$ 166,293
Ratio of type of loan to total loans receivable	1.60%	1.70%
Credit impaired acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 116,030	$ 87,081
Ratio of type of loan to total loans receivable	1.10%	0.90%
Covered loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 38,584	$ 75,909
Ratio of type of loan to total loans receivable	0.40%	0.80%

Loans Receivable - Loans on No

Loans Receivable - Loans on Non-accrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 56,748	$ 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	$ 43,856	$ 59,074
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	77.30%	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	$ 2,518	$ 732
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	4.40%	1.10%
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 509	$ 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	$ 939	$ 1,273
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	1.70%	1.90%
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 1,538	$ 2,558
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	2.70%	3.80%
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 6,681	$ 2,176
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	11.80%	3.20%
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 115	$ 0
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.20%	0.00%
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 473	$ 563
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.80%	0.80%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 119	$ 680
Ratio of nonaccrual loan by portfolio segment to total loans on nonaccrual status	0.20%	1.00%

Loans Receivable - Additional

Loans Receivable - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans by portfolio segment	$ 1,257
Impaired, interest lost on nonaccrual loans	$ 687
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.98%	1.47%	0.88%
Percent of TDRs classified as performing	96.60%
Troubled debt restructuring, amount	$ 1,694	$ 10,935
Basis point reduction, minimum	1.00%
Basis point reduction, maximum	2.00%
Loans receivable, gross	$ 10,110,184		$ 9,823,270
Single family residential loans as percentage of restructured loans	86.10%
South Valley Bancorp, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value of loans acquired	$ 1,700
Covered loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of past due loans to total loans, net of charge-offs and LIPs	3.94%		6.80%
Loans receivable, gross	$ 38,584		$ 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	12 months
Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructuring, amount	$ 282,723

Loans Receivable - Loans Recei

Loans Receivable - Loans Receivable, Analysis of Age of Loans in Past Due Status (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 9,574,334	$ 9,346,474
Current	9,480,363	9,263,876
Past due	$ 93,969	$ 82,598
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.98%	0.88%	1.47%
Ratio of total past due loans to total loans receivable, current	99.02%	99.12%
Ratio of total past due loans to total loans receivable, past due	0.98%	0.88%
Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 25,793	$ 21,212
Ratio of total past due loans to total loans receivable, past due	0.27%	0.23%
Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 13,767	$ 9,198
Ratio of total past due loans to total loans receivable, past due	0.14%	0.10%
Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 54,412	$ 52,188
Ratio of total past due loans to total loans receivable, past due	0.57%	0.56%
Non-Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 9,339,695	$ 9,073,176
Current	9,250,358	8,997,648
Past due	$ 89,335	$ 75,528
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.96%	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	$ 5,644,009	$ 5,655,928
Current	5,576,774	5,590,673
Past due	$ 67,234	$ 65,255
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.19%	1.15%
Non-Acquired loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 325,485	$ 130,121
Current	324,619	130,121
Past due	$ 866	$ 0
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.27%	0.00%
Non-Acquired loans | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 221,327	$ 205,692
Current	218,773	204,168
Past due	$ 2,554	$ 1,524
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.15%	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	$ 85,830	$ 75,661
Current	84,805	74,737
Past due	$ 1,025	$ 924
Ratio of past due loans to total loans, net of charge-offs and LIPs	1.19%	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	$ 102,887	$ 104,494
Current	100,224	102,045
Past due	$ 2,663	$ 2,449
Ratio of past due loans to total loans, net of charge-offs and LIPs	2.59%	2.34%
Non-Acquired loans | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 966,921	$ 1,068,038
Current	965,110	1,065,667
Past due	$ 1,811	$ 2,371
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.19%	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	$ 929,495	$ 893,072
Current	920,582	892,180
Past due	$ 8,913	$ 892
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.96%	0.10%
Non-Acquired loans | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 756,831	$ 617,545
Current	754,611	616,602
Past due	$ 2,220	$ 943
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.29%	0.15%
Non-Acquired loans | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 125,479	$ 127,648
Current	124,883	127,196
Past due	$ 595	$ 452
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.47%	0.35%
Non-Acquired loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	$ 181,431	$ 194,977
Current	179,977	194,259
Past due	$ 1,454	$ 718
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.80%	0.37%
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 24,245	$ 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	17,285	17,305
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	560	0
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	28	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	387	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	828	689
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1,196	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	841	131
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	2,219	93
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	19	174
Non-Acquired loans | Financing Receivables, 1 to 29 Days Past Due | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	882	493
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	13,456	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	9,939	7,757
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	306	0
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	9	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	897	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	1,933	0
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	1	27
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	19	27
Non-Acquired loans | Financing Receivables, 30 to 59 Days Past Due | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	352	170
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	51,637	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	40,010	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	2,518	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	638	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	938	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	615	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	6,139	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	558	251
Non-Acquired loans | Financing Receivables, 60 to 89 Days Past Due | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	221	55
Acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	140,995	57,682
Current	140,137	56,559
Past due	$ 858	$ 1,123
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.61%	1.95%
Acquired loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 193	$ 356
Acquired loans | Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	16	0
Acquired loans | Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	649	767
Credit impaired acquired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	55,060	139,726
Current	52,806	138,940
Past due	$ 2,254	$ 786
Ratio of past due loans to total loans, net of charge-offs and LIPs	4.09%	0.56%
Credit impaired acquired loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 854	$ 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	1,400	539
Covered loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans, net of charge-offs and LIP	38,584	75,890
Current	37,062	70,729
Past due	$ 1,522	$ 5,161
Ratio of past due loans to total loans, net of charge-offs and LIPs	3.94%	6.80%
Covered loans | Financing Receivables, 1 to 29 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 501	$ 272
Covered loans | Financing Receivables, 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	295	90
Covered loans | Financing Receivables, 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past due	$ 726	$ 4,799

Loans Receivable - Troubled De

Loans Receivable - Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2015USD ($)contract	Dec. 31, 2014USD ($)contract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	8	40
Pre-Modification Outstanding Recorded Investment	$ 1,694	$ 10,935
Troubled debt restructuring, amount	$ 1,694	$ 10,935
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	3	35
Pre-Modification Outstanding Recorded Investment	$ 729	$ 9,600
Troubled debt restructuring, amount	$ 729	$ 9,600
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	0	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 718
Troubled debt restructuring, amount	$ 0	$ 718
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	0	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 532
Troubled debt restructuring, amount	$ 0	$ 532
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	5	0
Pre-Modification Outstanding Recorded Investment	$ 965	$ 0
Troubled debt restructuring, amount	$ 965	$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts | contract	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 85
Troubled debt restructuring, amount	$ 0	$ 85

Loans Receivable - Loan Modifi

Loans Receivable - Loan Modifications (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2015USD ($)contract	Dec. 31, 2014USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	6	11
Recorded investment | $	$ 816	$ 1,820
Single-family residential
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	5	8
Recorded investment | $	$ 668	$ 1,431
Land - consumer lot loans
Financing Receivable, Modifications [Line Items]
Number of contracts (in contracts) | contract	1	3
Recorded investment | $	$ 148	$ 389

Loans Receivable - Schedule 28

Loans Receivable - Schedule of Changes in the Accretable Yield for Acquired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretion	$ 62		$ 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	97,125
Balance at beginning of period, carrying amount of loans	111,300	135,826	135,826
Additions, accretable yield	0	0
Additions, carrying amount of loans	0	0
Reclassification from nonaccretable balance, net, accretable yield	0	6,307
Reclassification from nonaccretable balance, net, carrying value of loans	0	0
Accretion, accretable yield	(5,526)	(30,727)
Accretion	5,526	30,727
Transfers to REO, accretable yield	0	0
Transfers to REO, carrying amount of loans	0	(2,975)
Payments received, net, accretable yield	0	0
Payments received, net, carrying amount of loans	(7,680)	(52,278)
Balance at end of period, accretable yield	67,179	72,705	72,705
Balance at end of period, carrying amount of loans	109,146	111,300	111,300
Acquired Non-Impaired Loans [Member]
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	14,513
Balance at beginning of period, carrying amount of loans	187,080	275,862	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	(857)	(7,655)
Accretion	857	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	(3,790)	(96,287)
Balance at end of period, accretable yield	6,347	7,204	7,204
Balance at end of period, carrying amount of loans	$ 184,147	$ 187,080	$ 187,080

Loans Receivable - FDIC Indemn

Loans Receivable - FDIC Indemnification Asset (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015
FDIC Indemnification Asset [Roll Forward]
Balance at beginning of period	$ 16,275	$ 36,860
Additions	0	(1,795)
Payments received	(1,974)	(720)
Amortization	(287)	(18,588)
Accretion	62	518
Balance at end of period	$ 14,076	$ 16,275

Allowance for Losses on Loans

Allowance for Losses on Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	$ 106,829	$ 114,591
Charge-offs	(2,121)	(14,600)
Recoveries	3,193	19,970
Provision & Transfers	0	(13,132)
Ending Allowance	107,901	106,829
Single-family residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	47,347	62,763
Charge-offs	(1,139)	(5,524)
Recoveries	2,466	13,403
Provision & Transfers	(918)	(23,295)
Ending Allowance	47,756	47,347
Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	6,680	6,742
Charge-offs	0	(388)
Recoveries	155	120
Provision & Transfers	179	206
Ending Allowance	7,014	6,680
Construction - custom
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	990	1,695
Charge-offs	(60)	0
Recoveries	0	0
Provision & Transfers	132	(705)
Ending Allowance	1,062	990
Land - acquisition & development
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	5,781	5,592
Charge-offs	0	(38)
Recoveries	35	207
Provision & Transfers	962	20
Ending Allowance	6,778	5,781
Land - consumer lot loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	2,946	3,077
Charge-offs	(408)	(459)
Recoveries	0	221
Provision & Transfers	463	107
Ending Allowance	3,001	2,946
Multi-family
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	5,304	4,248
Charge-offs	0	0
Recoveries	0	220
Provision & Transfers	(257)	836
Ending Allowance	5,047	5,304
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	8,960	7,548
Charge-offs	(23)	(1,711)
Recoveries	123	735
Provision & Transfers	1,284	2,388
Ending Allowance	10,344	8,960
Commercial & industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	24,980	16,527
Charge-offs	(248)	(3,354)
Recoveries	1	1,374
Provision & Transfers	(637)	10,433
Ending Allowance	24,096	24,980
HELOC
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	902	928
Charge-offs	(1)	(66)
Recoveries	21	2
Provision & Transfers	(102)	38
Ending Allowance	820	902
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	2,939	3,227
Charge-offs	(242)	(3,060)
Recoveries	392	3,688
Provision & Transfers	(1,106)	(916)
Ending Allowance	1,983	2,939
Covered loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance	$ 0	2,244
Charge-offs		0
Recoveries		0
Provision & Transfers		(2,244)
Ending Allowance		$ 0

Allowance for Losses on Loans31

Allowance for Losses on Loans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reversal of loan losses	$ 0	$ 5,500
Charge-offs, net of (recoveries)	(1,072)	$ (842)
Loans receivable, gross	10,110,184		$ 9,823,270
Nonaccrual of interest	$ 56,748		$ 67,810
Nonaccrual of interest, percent increase (decrease)	(42.30%)
Ratio of past due loans to total loans, net of charge-offs and LIPs	0.98%	1.47%	0.88%
Allowance for probable losses	$ 107,901		$ 106,829	$ 114,591
Allowance for credit losses and reserve for unfunded commitments	$ 110,986
Allowance for credit losses and reserve for unfunded commitments, percent of gross loans	1.10%
Acquired loans subject to general allowance	$ 25,223
Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	3,085		3,085
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	43,856		59,074
Allowance for probable losses	47,756		47,347	$ 62,763
Loans Collectively Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	9,232,046		8,963,453
Allowance for probable losses	107,771		106,554
Loans Collectively Evaluated for Impairment | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	5,614,580		5,595,752
Allowance for probable losses	47,625		47,073
Loans Individually Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	49,067		85,513
Allowance for probable losses	130		275
Loans Individually Evaluated for Impairment | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	14,206		51,718
Allowance for probable losses	130		275
Non-Performing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross	$ 98,846	$ 164,317
Ratio of non-performing assets to total assets	0.67%	1.13%
Nonaccrual of interest	$ 56,748	$ 98,353	67,810
Non-Performing Loans | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual of interest	$ 43,856		$ 59,074

Allowance for Losses on Loans32

Allowance for Losses on Loans - Loans Evaluated for Impairment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 107,901	$ 106,829	$ 114,591
Loans receivable, gross	10,110,184	9,823,270
Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	47,756	47,347	62,763
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	7,014	6,680	6,742
Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	1,062	990	1,695
Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	6,778	5,781	5,592
Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	3,001	2,946	3,077
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	5,047	5,304	4,248
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	10,344	8,960	7,548
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	24,096	24,980	16,527
HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	820	902	928
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	1,983	2,939	$ 3,227
Loans Collectively Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	107,771	106,554
Loans receivable, gross	$ 9,232,046	$ 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 probable losses	$ 47,625	$ 47,073
Loans receivable, gross	$ 5,614,580	$ 5,595,752
Ratio	0.80%	0.80%
Loans Collectively Evaluated for Impairment | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 7,014	$ 6,680
Loans receivable, gross	$ 121,689	$ 124,679
Ratio	5.80%	5.40%
Loans Collectively Evaluated for Impairment | Construction - custom
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 1,062	$ 990
Loans receivable, gross	$ 218,749	$ 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 probable losses	$ 6,778	$ 5,781
Loans receivable, gross	$ 77,223	$ 72,602
Ratio	8.80%	8.00%
Loans Collectively Evaluated for Impairment | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 3,001	$ 2,946
Loans receivable, gross	$ 91,664	$ 93,103
Ratio	3.30%	3.20%
Loans Collectively Evaluated for Impairment | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 5,048	$ 5,304
Loans receivable, gross	$ 1,085,243	$ 1,062,194
Ratio	0.50%	0.50%
Loans Collectively Evaluated for Impairment | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 10,344	$ 8,960
Loans receivable, gross	$ 939,248	$ 844,691
Ratio	1.10%	1.10%
Loans Collectively Evaluated for Impairment | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 24,096	$ 24,980
Loans receivable, gross	$ 776,240	$ 643,577
Ratio	3.10%	3.90%
Loans Collectively Evaluated for Impairment | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 820	$ 902
Loans receivable, gross	$ 126,596	$ 126,594
Ratio	0.60%	0.70%
Loans Collectively Evaluated for Impairment | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 1,983	$ 2,938
Loans receivable, gross	$ 180,814	$ 194,569
Ratio	1.10%	1.50%
Loans Individually Evaluated for Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 130	$ 275
Loans receivable, gross	$ 49,067	$ 85,513
Ratio	0.30%	0.30%
Loans Individually Evaluated for Impairment | Single-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 130	$ 275
Loans receivable, gross	$ 14,206	$ 51,718
Ratio	0.90%	0.50%
Loans Individually Evaluated for Impairment | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable 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 probable losses	$ 0	$ 0
Loans receivable, gross	$ 2,578	$ 0
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Land - acquisition & development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 0	$ 0
Loans receivable, gross	$ 6,649	$ 2,198
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Land - consumer lot loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 0	$ 0
Loans receivable, gross	$ 10,658	$ 10,824
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 0	$ 0
Loans receivable, gross	$ 3,500	$ 5,348
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 0	$ 0
Loans receivable, gross	$ 9,811	$ 8,826
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 0	$ 0
Loans receivable, gross	$ 27	$ 0
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | HELOC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 0	$ 0
Loans receivable, gross	$ 1,310	$ 1,072
Ratio	0.00%	0.00%
Loans Individually Evaluated for Impairment | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for probable losses	$ 0	$ 0
Loans receivable, gross	$ 328	$ 86
Ratio	0.00%	0.00%

Allowance for Losses on Loans33

Allowance for Losses on Loans - Internally Assigned Grade (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 10,110,184	$ 9,823,270
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 9,900,516	$ 9,605,919
Total grade as a % of total net loans	97.90%	97.80%
Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 21,269	$ 6,721
Total grade as a % of total net loans	0.20%	0.10%
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 188,399	$ 210,630
Total grade as a % of total net loans	1.90%	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	$ 0	$ 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	$ 9,791,190	$ 9,493,987
Non-Acquired loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	9,630,645	9,333,233
Non-Acquired loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	21,070	6,721
Non-Acquired loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	139,475	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	5,629,715	5,651,845
Non-Acquired loans | Single-family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	5,551,785	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	77,930	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	660,238	200,509
Non-Acquired loans | Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	655,964	197,935
Non-Acquired loans | Construction | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	4,274	0
Non-Acquired loans | Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	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	404,849	396,307
Non-Acquired loans | Construction - custom | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	402,000	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	2,849	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	97,025	94,208
Non-Acquired loans | Land - acquisition & development | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	87,772	89,656
Non-Acquired loans | Land - acquisition & development | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	5,627	0
Non-Acquired loans | Land - acquisition & development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,626	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	102,376	103,989
Non-Acquired loans | Land - consumer lot loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	100,125	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	2,251	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	997,696	1,125,722
Non-Acquired loans | Multi-family | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	997,696	1,118,673
Non-Acquired loans | Multi-family | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	865
Non-Acquired loans | Multi-family | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	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	839,157	986,270
Non-Acquired loans | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	813,974	971,510
Non-Acquired loans | Commercial real estate | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	8,111	4,360
Non-Acquired loans | Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	17,073	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	751,073	612,836
Non-Acquired loans | Commercial & industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	713,240	575,034
Non-Acquired loans | Commercial & industrial | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	3,058	1,496
Non-Acquired loans | Commercial & industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	34,775	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	127,919	127,646
Non-Acquired loans | HELOC | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	127,198	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	721	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	181,142	194,655
Non-Acquired loans | Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	180,892	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	250	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
Acquired loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	164,380	166,293
Acquired loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	152,761	149,891
Acquired loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
Acquired loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	11,619	16,402
Acquired loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	0	0
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	116,030	87,081
Credit impaired acquired loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	79,555	61,019
Credit impaired acquired loans | Special mention
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	199	0
Credit impaired acquired loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	36,276	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	0	0
Covered loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	38,584	75,909
Covered loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	37,555	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	1,029	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	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 10,110,184	$ 9,823,270
Nonaccrual loans by portfolio segment	56,748	67,810
Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 9,734,442	$ 9,426,177
Total grade as a % of total net loans	99.40%	99.30%
Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 98,846		$ 164,317
Nonaccrual loans by portfolio segment	$ 56,748	$ 67,810	$ 98,353
Grade as a percentage of total gross loans	0.60%	0.70%
Single-family residential
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 43,856	$ 59,074
Single-family residential | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 5,585,859	$ 5,592,771
Total grade as a % of total net loans	99.20%	99.00%
Single-family residential | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 43,856	$ 59,074
Grade as a percentage of total gross loans	0.80%	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	$ 660,238	$ 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	$ 2,518	$ 732
Construction - custom | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 402,331	$ 395,575
Total grade as a % of total net loans	99.40%	99.80%
Construction - custom | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 2,518	$ 732
Grade as a percentage of total gross loans	0.60%	0.20%
Land - acquisition & development
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 509	$ 0
Land - acquisition & development | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 96,516	$ 94,208
Total grade as a % of total net loans	99.50%	100.00%
Land - acquisition & development | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 509	$ 0
Grade as a percentage of total gross loans	0.50%	0.00%
Land - consumer lot loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 939	$ 1,273
Land - consumer lot loans | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 101,437	$ 102,716
Total grade as a % of total net loans	99.10%	98.80%
Land - consumer lot loans | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 939	$ 1,273
Grade as a percentage of total gross loans	0.90%	1.20%
Multi-family
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 1,538	$ 2,558
Multi-family | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 996,158	$ 1,123,165
Total grade as a % of total net loans	99.80%	99.80%
Multi-family | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 1,538	$ 2,558
Grade as a percentage of total gross loans	0.20%	0.20%
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 6,681	$ 2,176
Commercial real estate | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 832,476	$ 984,093
Total grade as a % of total net loans	99.20%	99.80%
Commercial real estate | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 6,681	$ 2,176
Grade as a percentage of total gross loans	0.80%	0.20%
Commercial & industrial
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 115	$ 0
Commercial & industrial | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 750,958	$ 612,836
Total grade as a % of total net loans	100.00%	100.00%
Commercial & industrial | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 115	$ 0
Grade as a percentage of total gross loans	0.00%	0.00%
HELOC
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 473	$ 563
HELOC | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 127,446	$ 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	$ 473	$ 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	$ 119	$ 680
Consumer | Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Loans receivable, gross	$ 181,023	$ 193,975
Total grade as a % of total net loans	99.90%	99.70%
Consumer | Non-Performing Loans
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual loans by portfolio segment	$ 119	$ 680
Grade as a percentage of total gross loans	0.10%	0.30%

Allowance for Losses on Loans35

Allowance for Losses on Loans - Impaired Loans Based on Loan Types (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 313,924	$ 341,579
Unpaid Principal Balance	343,325	381,223
Related Allowance	6,339	6,678
Average Recorded Investment	311,146	333,815
Amount of related allowance included in specific reserves	130	275
Amount of related allowance included in general reserves	6,209	6,403
Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	26,811	38,866
Unpaid Principal Balance	47,865	70,564
Related Allowance	0	0
Average Recorded Investment	22,840	29,474
Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	287,113	302,713
Unpaid Principal Balance	295,460	310,659
Related Allowance	6,339	6,678
Average Recorded Investment	288,306	304,341
Single-family residential
Financing Receivable, Impaired [Line Items]
Recorded Investment	261,001	276,711
Unpaid Principal Balance	265,834	282,912
Related Allowance	6,339	6,678
Average Recorded Investment	259,759	274,097
Single-family residential | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	14,791	17,250
Unpaid Principal Balance	16,304	19,644
Related Allowance	0	0
Average Recorded Investment	12,837	14,069
Single-family residential | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	246,210	259,461
Unpaid Principal Balance	249,530	263,268
Related Allowance	6,339	6,678
Average Recorded Investment	246,922	260,028
Construction
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	5,441
Unpaid Principal Balance	0	7,929
Related Allowance	0	0
Average Recorded Investment	0	5,903
Construction | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	453
Unpaid Principal Balance	0	2,151
Related Allowance	0	0
Average Recorded Investment	0	471
Construction | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	0	4,988
Unpaid Principal Balance	0	5,778
Related Allowance	0	0
Average Recorded Investment	0	5,432
Construction - custom
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,182	554
Unpaid Principal Balance	1,182	554
Related Allowance	0	0
Average Recorded Investment	868	182
Construction - custom | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,182	554
Unpaid Principal Balance	1,182	554
Related Allowance	0	0
Average Recorded Investment	868	182
Construction - custom | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	0
Unpaid Principal Balance	0
Related Allowance	0
Average Recorded Investment	0
Land - acquisition & development
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,643	5,056
Unpaid Principal Balance	11,933	12,852
Related Allowance	0	0
Average Recorded Investment	3,621	4,404
Land - acquisition & development | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	542	2,570
Unpaid Principal Balance	8,630	9,426
Related Allowance	0	0
Average Recorded Investment	1,327	926
Land - acquisition & development | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,101	2,486
Unpaid Principal Balance	3,303	3,426
Related Allowance	0	0
Average Recorded Investment	2,294	3,478
Land - consumer lot loans
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,590	12,016
Unpaid Principal Balance	11,872	12,368
Related Allowance	0	0
Average Recorded Investment	11,547	11,868
Land - consumer lot loans | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	510	727
Unpaid Principal Balance	527	814
Related Allowance	0	0
Average Recorded Investment	427	544
Land - consumer lot loans | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,080	11,289
Unpaid Principal Balance	11,345	11,554
Related Allowance	0	0
Average Recorded Investment	11,120	11,324
Multi-family
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,191	7,593
Unpaid Principal Balance	7,189	10,877
Related Allowance	0	0
Average Recorded Investment	3,554	5,277
Multi-family | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	761	3,770
Unpaid Principal Balance	4,754	7,054
Related Allowance	0	0
Average Recorded Investment	1,117	1,545
Multi-family | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,430	3,823
Unpaid Principal Balance	2,435	3,823
Related Allowance	0	0
Average Recorded Investment	2,437	3,732
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	31,133	28,551
Unpaid Principal Balance	35,839	36,698
Related Allowance	0	0
Average Recorded Investment	28,728	27,016
Commercial real estate | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	7,331	9,427
Unpaid Principal Balance	8,671	15,620
Related Allowance	0	0
Average Recorded Investment	4,686	8,130
Commercial real estate | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	23,802	19,124
Unpaid Principal Balance	27,168	21,078
Related Allowance	0	0
Average Recorded Investment	24,042	18,886
Commercial & industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment	953	2,955
Unpaid Principal Balance	6,687	13,066
Related Allowance	0	0
Average Recorded Investment	948	2,681
Commercial & industrial | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	953	2,955
Unpaid Principal Balance	6,687	13,066
Related Allowance	0	0
Average Recorded Investment	948	2,681
Commercial & industrial | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	0
Unpaid Principal Balance	0
Related Allowance	0
Average Recorded Investment	0
HELOC
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,655	2,126
Unpaid Principal Balance	2,024	2,975
Related Allowance	0	0
Average Recorded Investment	1,638	1,895
HELOC | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	262	683
Unpaid Principal Balance	631	1,532
Related Allowance	0	0
Average Recorded Investment	245	536
HELOC | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,393	1,443
Unpaid Principal Balance	1,393	1,443
Related Allowance	0	0
Average Recorded Investment	1,393	1,359
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	576	576
Unpaid Principal Balance	765	992
Related Allowance	0	0
Average Recorded Investment	483	492
Consumer | Financing Receivable, Impairment, No Related Allowance
Financing Receivable, Impaired [Line Items]
Recorded Investment	479	477
Unpaid Principal Balance	479	703
Related Allowance	0	0
Average Recorded Investment	385	390
Consumer | Financing Receivable, Impairment, Allowance Recorded
Financing Receivable, Impaired [Line Items]
Recorded Investment	97	99
Unpaid Principal Balance	286	289
Related Allowance	0	0
Average Recorded Investment	$ 98	$ 102

Fair Value Measurements - Recu

Fair Value Measurements - Recurring and Nonrecurring (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	$ 2,304,788		$ 2,380,563
Total financial assets	3,876,077		4,017,983
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	2,304,788		2,380,563
Interest rate contracts	9,656		11,879
Total financial assets	2,314,444		2,392,442
Total financial liabilities	21,980		27,400
Recurring | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	9,656		11,879
Recurring | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	565		966
Recurring | Long term borrowing hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	11,759		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	101,558		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	425,814		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	27,232		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	505,406		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	1,149,087		1,160,518
Recurring | Other Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	95,691		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	101,558		101,952
Interest rate contracts	0		0
Total financial assets	101,558		101,952
Total financial liabilities	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
Recurring | Level 1 | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	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
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	101,558		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
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
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
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
Recurring | Level 1 | Other Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	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	2,203,230		2,278,611
Interest rate contracts	9,656		11,879
Total financial assets	2,212,886		2,290,490
Total financial liabilities	21,980		27,400
Recurring | Level 2 | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	9,656		11,879
Recurring | Level 2 | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	565		966
Recurring | Level 2 | Long term borrowing hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	11,759		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
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	425,814		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	27,232		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	505,406		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	1,149,087		1,160,518
Recurring | Level 2 | Other Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	95,691		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
Interest rate contracts	0		0
Total financial assets	0		0
Total financial liabilities	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
Recurring | Level 3 | Commercial loan hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contracts	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
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
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
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
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
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
Recurring | Level 3 | Other Commercial MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, at fair value	0		$ 0
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	15,669	$ 38,088
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	(3,436)	8,173
Nonrecurring | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	8,524	146
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	(1,681)	(64)
Nonrecurring | Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	7,145	37,942
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	(1,755)	8,237
Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0
Nonrecurring | Level 1 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	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
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	0	0
Nonrecurring | Level 2 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	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
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	15,669	38,088
Nonrecurring | Level 3 | Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	8,524	146
Nonrecurring | Level 3 | Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, nonrecurring	$ 7,145	$ 37,942

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	$ 2,304,788	$ 2,380,563
FHLB and FRB stock	111,107	107,198
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	2,304,788	2,380,563
Held-to-maturity securities	1,598,370	1,643,216
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	2,304,788	2,380,563
Held-to-maturity securities	1,571,288	1,637,420
Level 1 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	305,959	284,049
Level 1 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	305,959	284,049
Level 1 | Equity securities | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	101,558	101,952
Level 1 | Equity securities | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	101,558	101,952
Level 2 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
FHLB and FRB stock	111,107	107,198
Other assets - interest rate contracts	9,656	11,879
Customer accounts	10,651,119	10,631,703
FHLB advances	1,928,000	1,830,000
Level 2 | Carrying Amount | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	9,656	11,879
Level 2 | Carrying Amount | Commercial loan hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	565	966
Level 2 | Carrying Amount | Long term borrowing hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	11,759	14,555
Level 2 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
FHLB and FRB stock	111,107	107,198
Other assets - interest rate contracts	9,656	11,879
Customer accounts	9,920,280	10,004,290
FHLB advances	2,012,603	1,938,384
Level 2 | Estimated Fair Value | Interest rate contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	9,656	11,879
Level 2 | Estimated Fair Value | Commercial loan hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	565	966
Level 2 | Estimated Fair Value | Long term borrowing hedge
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other liabilities	11,759	14,555
Level 2 | Agency pass-through certificates | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	1,598,370	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	1,571,288	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	425,814	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	425,814	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	27,232	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	27,232	27,123
Level 2 | Corporate debt securities | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	505,406	505,800
Level 2 | Corporate debt securities | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	505,406	505,800
Level 2 | Agency pass-through certificates | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	1,149,087	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	1,149,087	1,160,518
Level 2 | Other Commercial MBS | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	95,691	102,706
Level 2 | Other Commercial MBS | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	95,691	102,706
Level 3 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	9,402,730	9,170,634
FDIC indemnification asset	14,076	16,275
Level 3 | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans receivable	9,901,403	9,667,750
FDIC indemnification asset	$ 13,271	$ 15,522

Fair Value Measurements - Inve

Fair Value Measurements - Investments by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Amortized Cost, Available-for-sale securities
Amortized Cost	$ 2,300,034	$ 2,365,450
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains	19,990	28,158
Gross unrealized loss	(15,236)	(13,045)
Fair Value, Available-for-sale securities
Available-for-sale securities, at fair value	$ 2,304,788	$ 2,380,563
Yield, Available-for-sale securities
Yield	2.07%	1.97%
Yield, Held-to-maturity securities
Investments	$ 3,898,404	$ 4,008,666
Gross unrealized gains on investments	25,628	38,674
Gross unrealized losses on investments	(47,955)	(29,357)
Total financial assets	$ 3,876,077	$ 4,017,983
Yield on investments	2.53%	2.46%
Obligations of U.S. government
Amortized Cost, Available-for-sale securities
1 to 5 years	$ 99,907	$ 105,065
5 to 10 years	76,604	119,071
Over 10 years	254,886	262,832
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, 1 to 5 years	1,600	1,923
Gross unrealized gains, 5 to 10 years	0	35
Gross unrealized gains, Over 10 years	100	0
Gross unrealized losses, 1 to 5 years	(593)	(274)
Gross unrealized losses, 5 to 10 years	(1,852)	(1,247)
Gross unrealized losses, Over 10 years	(4,838)	(4,941)
Fair Value, Available-for-sale securities
1 to 5 years	100,914	106,714
5 to 10 years	74,752	117,859
Over 10 years	$ 250,148	$ 257,891
Yield, Available-for-sale securities
1 to 5 years	1.89%	1.74%
5 to 10 years	1.35%	1.54%
Over 10 years	1.34%	1.23%
Equity securities
Amortized Cost, Available-for-sale securities
Within 1 year	$ 500	$ 500
1 to 5 years	99,922	99,922
5 to 10 years	0
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Within 1 year	11	17
Gross unrealized gains, 1 to 5 years	1,124	1,513
Gross unrealized gains, 5 to 10 years	0
Gross unrealized losses, Within 1 year	0	0
Gross unrealized losses, 1 to 5 years	0	0
Gross unrealized losses, 5 to 10 years	0
Fair Value, Available-for-sale securities
Within 1 year	511	517
1 to 5 years	101,046	$ 101,435
5 to 10 years	$ 0
Yield, Available-for-sale securities
Within 1 year	1.80%	1.80%
1 to 5 years	1.90%	1.90%
5 to 10 years	0.00%
Corporate debt securities
Amortized Cost, Available-for-sale securities
Within 1 year	$ 24,872	$ 24,787
1 to 5 years	341,470	311,435
5 to 10 years	89,952	100,000
Over 10 years	50,000	69,950
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Within 1 year	103	191
Gross unrealized gains, 1 to 5 years	839	1,190
Gross unrealized gains, 5 to 10 years	558	876
Gross unrealized gains, Over 10 years	750	953
Gross unrealized losses, Within 1 year	0	0
Gross unrealized losses, 1 to 5 years	(108)	(58)
Gross unrealized losses, 5 to 10 years	(3,030)	(3,524)
Gross unrealized losses, Over 10 years	0	0
Fair Value, Available-for-sale securities
Within 1 year	24,975	24,978
1 to 5 years	342,201	312,567
5 to 10 years	87,480	97,352
Over 10 years	$ 50,750	$ 70,903
Yield, Available-for-sale securities
Within 1 year	0.57%	0.53%
1 to 5 years	1.20%	0.88%
5 to 10 years	1.80%	1.47%
Over 10 years	3.00%	3.00%
Municipal bonds due
Amortized Cost, Available-for-sale securities
1 to 5 years	$ 2,292	$ 2,285
5 to 10 years	1,311	1,303
Over 10 years	20,377	20,382
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, 1 to 5 years	3	8
Gross unrealized gains, 5 to 10 years	18	7
Gross unrealized gains, Over 10 years	3,230	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	2,295	2,293
5 to 10 years	1,329	1,310
Over 10 years	$ 23,607	$ 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	$ 1,141,558	$ 1,144,787
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Without single maturity date	11,636	18,222
Gross unrealized losses, Without single maturity date	(4,105)	(2,491)
Fair Value, Available-for-sale securities
Without single maturity date	$ 1,149,089	$ 1,160,518
Yield, Available-for-sale securities
Without single maturity date	2.56%	2.48%
Amortized Cost, Held-to-maturity securities
Without single maturity date	$ 1,598,370	$ 1,643,216
Gross Unrealized Gains / Losses, Held-to-maturity securities
Gross unrealized gains, Without single maturity date	5,638	10,516
Gross unrealized losses, Without single maturity date	(32,719)	(16,312)
Fair Value, Held-to-maturity securities
Without single maturity date	$ 1,571,289	$ 1,637,420
Yield, Held-to-maturity securities
Without a single maturity date	3.19%	3.19%
Other Commercial MBS
Amortized Cost, Available-for-sale securities
Without single maturity date	$ 96,383	$ 103,131
Gross Unrealized Gains / Losses, Available-for-sale securities
Gross unrealized gains, Without single maturity date	18	85
Gross unrealized losses, Without single maturity date	(710)	(510)
Fair Value, Available-for-sale securities
Without single maturity date	$ 95,691	$ 102,706
Yield, Available-for-sale securities
Without single maturity date	1.58%	1.51%

Fair Value Measurements - Addi

Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Proceeds on available-for-sale securities sold	$ 0	$ 0
Term of contractual due dates of substantially all mortgage-backed securities	10 years

Fair Value Measurements - Secu

Fair Value Measurements - Securities in Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	$ (8,351)	$ (6,229)
Less than 12 months, fair value	912,470	578,646
12 months or more, unrealized gross losses	(39,605)	(23,128)
12 months or more, fair value	1,422,702	1,297,408
Total unrealized gross losses	(47,956)	(29,357)
Total, fair value	2,335,172	1,876,054
Corporate bonds due
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	(108)	(183)
Less than 12 months, fair value	32,986	72,862
12 months or more, unrealized gross losses	(3,030)	(3,399)
12 months or more, fair value	46,970	46,601
Total unrealized gross losses	(3,138)	(3,582)
Total, fair value	79,956	119,463
U.S. government and agency securities due
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	(5,062)	(5,010)
Less than 12 months, fair value	243,329	336,243
12 months or more, unrealized gross losses	(2,221)	(1,452)
12 months or more, fair value	109,611	57,344
Total unrealized gross losses	(7,283)	(6,462)
Total, fair value	352,940	393,587
Agency pass-through certificates
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, unrealized gross losses	(3,181)	(1,036)
Less than 12 months, fair value	636,155	169,541
12 months or more, unrealized gross losses	(34,354)	(18,277)
12 months or more, fair value	1,266,121	1,193,463
Total unrealized gross losses	(37,535)	(19,313)
Total, fair value	$ 1,902,276	$ 1,363,004

Derivatives and Hedging Activ41

Derivatives and Hedging Activities (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Derivative [Line Items]
Gain (loss) on derivative instruments	$ 0
Other comprehensive income (loss) on long term borrowing hedge, net of tax	1,768,000	$ (2,687,000)
Derivative asset, fair value, gross asset	9,656,000		$ 11,879,000
Derivative liability, fair value, gross liability	21,980,000		27,400,000
Interest rate swap agreements
Derivative [Line Items]
Customer derivatives program	474,900,000		439,416,000
Notional amount	54,155,000		54,815,000
Interest rate contracts | Other assets
Derivative [Line Items]
Derivative asset, fair value, gross asset	9,656,000		11,879,000
Interest rate contracts | Other liabilities
Derivative [Line Items]
Derivative liability, fair value, gross liability	9,656,000		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	565,000		966,000
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	11,759,000		14,555,000
Forward Contracts | Interest rate swap agreements
Derivative [Line Items]
Notional amount	$ 400,000,000		$ 400,000,000