Great Western Bancorp (GWB) 10-Q 14 Aug 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2015	Aug. 10, 2015
Document Information [Abstract]
Entity Registrant Name	Great Western Bancorp, Inc.
Entity Central Index Key	1,613,665
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		55,219,596

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Assets
Cash and due from banks	$ 187,171	$ 256,639
Securities available for sale	1,410,475	1,341,242
Investment in affiliates	1,683	1,683
Loans, net of allowance for loan losses of $55,930 and $47,518 at June 30, 2015 and September 30, 2014, respectively (includes $102,203 and $234,036 of loans covered by FDIC loss share agreements at June 30, 2015 and September 30, 2014, respectively, $1,063,665 and $985,411 of loans and written loan commitments carried at fair value under the fair value option at June 30, 2015 and September 30, 2014, respectively, and $9,173 and $10,381 of loans held for sale at June 30, 2015 and September 30, 2014, respe	7,189,309	6,739,949
Premises and equipment	98,235	103,707
Accrued interest receivable	39,528	42,609
Other repossessed property (includes $205 and $10,628 of property covered under FDIC loss share agreements at June 30, 2015 and September 30, 2014, respectively)	21,969	49,580
FDIC indemnification asset	16,979	26,678
Goodwill	697,807	697,807
Core deposits and other intangibles	7,827	14,229
Net deferred tax assets	38,884	44,703
Other assets	54,292	52,603
Total assets	9,764,159	9,371,429
Deposits:
Noninterest-bearing	1,360,722	1,303,015
Interest-bearing	5,996,966	5,749,165
Total deposits	7,357,688	7,052,180
Securities sold under agreements to repurchase	161,559	161,687
FHLB advances and other borrowings	590,520	575,094
Related party notes payable	41,295	41,295
Subordinated debentures	56,083	56,083
Fair value of derivatives	24,426	13,092
Accrued interest payable	4,211	5,273
Income tax payable	0	4,915
Accrued expenses and other liabilities	40,526	40,720
Total liabilities	8,276,308	7,950,339
Stockholders' equity
Common stock, $0.01 par value, authorized 500,000,000 shares; issued and outstanding at June 30, 2015 and September 30, 2014 - 57,886,114 shares	579	579
Additional paid-in capital	1,261,102	1,260,124
Retained earnings	227,904	166,544
Accumulated other comprehensive loss	(1,734)	(6,157)
Total stockholders' equity	1,487,851	1,421,090
Total liabilities and stockholders' equity	$ 9,764,159	$ 9,371,429

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 55,930	$ 47,518
Loans covered by FDIC loss share agreements	102,203	234,036
Loans and written loan commitments at fair value under the fair value option	1,063,665	985,411
Loan held for sale	9,173	10,381
Property covered under FDIC loss share agreements	$ 205	$ 10,628
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	57,886,114	57,886,114
Common stock, shares outstanding	57,886,114	57,886,114

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest and Fee Income, Loans and Leases [Abstract]
Loans	$ 85,240	$ 80,797	$ 251,978	$ 240,133
Taxable securities	5,984	6,598	17,050	20,190
Nontaxable securities	10	33	36	61
Dividends on securities	489	351	997	751
Federal funds sold and other	155	99	599	400
Total interest and dividend income	91,878	87,878	270,660	261,535
Interest expense
Deposits	5,776	6,319	17,775	19,629
Securities sold under agreements to repurchase	134	153	430	442
FHLB advances and other borrowings	867	751	2,706	2,591
Related party notes payable	233	230	692	690
Subordinated debentures and other	330	325	985	985
Total interest expense	7,340	7,778	22,588	24,337
Net interest income	84,538	80,100	248,072	237,198
Provision (recovery) for loan losses	4,410	1,500	17,408	(2,065)
Net interest income after provision for loan losses	80,128	78,600	230,664	239,263
Noninterest income
Service charges and other fees	9,627	9,695	28,896	29,728
Net gain on sale of loans	1,903	1,322	5,027	3,885
Casualty insurance commissions	333	320	882	877
Investment center income	742	578	1,969	1,757
Net gain on sale of securities	0	0	51	6
Trust department income	897	942	2,903	2,847
Net increase (decrease) in fair value of loans at fair value	(24,394)	13,886	7,914	13,506
Net realized and unrealized gain (loss) on derivatives	18,946	(17,797)	(27,357)	(25,396)
Other	1,951	1,368	4,556	4,070
Total noninterest income	10,005	10,314	24,841	31,280
Noninterest expense
Salaries and employee benefits	26,612	24,126	75,373	71,176
Occupancy expenses, net	3,161	4,894	11,169	13,613
Data processing	4,657	4,354	14,193	14,105
Equipment expenses	1,075	1,077	2,956	3,099
Advertising	1,196	1,213	2,870	3,385
Communication expenses	1,031	1,046	3,429	3,402
Professional fees	3,289	3,620	10,464	9,623
Net (gain) from sale of repossessed property and other assets	(1,452)	(1,564)	(1,836)	(2,413)
Amortization of core deposits and other intangibles	1,776	4,069	6,402	13,448
Other	5,085	11,443	16,939	22,466
Total noninterest expense	46,430	54,278	141,959	151,904
Income before income taxes	43,703	34,636	113,546	118,639
Provision for income taxes	14,871	12,134	38,293	41,562
Net income	28,832	22,502	75,253	77,077
Other comprehensive income (loss) - change in net unrealized gain (loss) on securities available-for-sale (net of deferred income tax (expense) benefit of $2,254 and $(2,946) for the three months ended June 30, 2015 and 2014, respectively and $(2,712) and ($2,684) for the nine months ended June 30, 2015 and 2014, respectively)	(3,845)	4,806	4,423	4,673
Comprehensive income	$ 24,987	$ 27,308	$ 79,676	$ 81,750
Earnings per common share
Weighted average shares outstanding	57,898,335	57,886,114	57,897,484	57,886,114
Earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Diluted earnings per common share
Weighted average shares outstanding	57,959,202	57,886,114	57,929,188	57,886,114
Diluted earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Dividends per share
Dividends issued	$ 6,946	$ 34,000	$ 13,893	$ 68,000
Dividends per share (in dollars per share)	$ 0.12	$ 0.59	$ 0.24	$ 1.17

Consolidated Statements of Com5

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Income tax (expense) benefit	$ 2,254	$ (2,946)	$ (2,712)	$ (2,684)

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Comprehensive Income	Common Stock Par Value	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Sep. 30, 2013	$ 1,417,214		$ 579	$ 1,260,124	$ 163,592	$ (7,081)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	77,077	$ 77,077			77,077
Other comprehensive income, net of tax:
Net change in net unrealized gain on securities available for sale	4,673	4,673				4,673
Comprehensive income	81,750	81,750
Common stock, $1.17 and $0.24 in FY 2014 and FY 2015, respectively	(68,000)				(68,000)
Ending balance at Jun. 30, 2014	1,430,964		579	1,260,124	172,669	(2,408)
Beginning balance at Sep. 30, 2014	1,421,090		579	1,260,124	166,544	(6,157)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	75,253	75,253			75,253
Other comprehensive income, net of tax:
Net change in net unrealized gain on securities available for sale	4,423	4,423				4,423
Comprehensive income	79,676	$ 79,676
Stock-based compensation	978			978
Common stock, $1.17 and $0.24 in FY 2014 and FY 2015, respectively	(13,893)				(13,893)
Ending balance at Jun. 30, 2015	$ 1,487,851		$ 579	$ 1,261,102	$ 227,904	$ (1,734)

Consolidated Statement of Stoc7

Consolidated Statement of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends paid on common stock (in USD per share)	$ 0.24	$ 1.17

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 75,253	$ 77,077
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,046	27,790
Net gain on sale of securities	(51)	(6)
Net gain on sale of loans	(5,027)	(3,885)
Net (gain) loss on sale of premises and equipment	(1,681)	1,417
Net gain from sale of repossessed property and other assets	(1,836)	(2,413)
Provision (recovery) for loan losses	17,408	(2,065)
Provision for repossessed assets	5,564	8,997
Proceeds from FDIC indemnification claims	1,666	5,330
Stock-based compensation	978	0
Originations of residential real estate loans held-for-sale	(212,144)	(149,001)
Proceeds from sales of residential real estate loans held-for-sale	218,379	150,163
Net deferred income taxes	3,107	(8,743)
Changes in:
Accrued interest receivable	3,081	4,010
Other assets	(1,324)	1,175
FDIC indemnification asset	8,033	8,128
FDIC clawback liability	708	682
Accrued interest payable and other liabilities	4,456	12,145
Net cash provided by operating activities	134,616	130,801
Investing activities
Purchase of securities available for sale	(327,955)	(148,670)
Proceeds from sales of securities available for sale	55,149	4,450
Proceeds from maturities of securities available for sale	205,609	229,275
Net increase in loans	(475,421)	(351,360)
Purchase of premises and equipment	(2,108)	(2,263)
Proceeds from sale of premises and equipment	2,765	743
Proceeds from sale of other assets	31,329	28,141
Purchase of FHLB stock	(365)	(1,649)
Net cash used in investing activities	(510,997)	(241,333)
Financing activities
Net increase in deposits	305,508	118,904
Net decrease in securities sold under agreements to repurchase	(128)	(31,942)
Net increase in FHLB advances and other borrowings	15,426	44,490
Dividends paid	(13,893)	(68,000)
Net cash provided by financing activities	306,913	63,452
Net decrease in cash and due from banks	(69,468)	(47,080)
Cash and due from banks, beginning of period	256,639	282,157
Cash and due from banks, end of period	187,171	235,077
Supplemental disclosures of cash flows information
Cash payments for interest	23,650	25,484
Cash payments for income taxes	42,088	45,520
Supplemental schedules of noncash investing and financing activities
Loans transferred to repossessed assets and other assets	$ 7,447	$ 31,493

Basis of Presentation

Basis of Presentation	9 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Great Western Bancorp, Inc. (the “Company”) is a bank holding company organized under the laws of Delaware. The primary business of the Company is ownership of its wholly owned subsidiary, Great Western Bank (the “Bank”). The Bank is a full-service regional bank focused on relationship-based business and agribusiness banking in Arizona, Colorado, Iowa, Kansas, Missouri, Nebraska, and South Dakota. The Company and the Bank are subject to the regulation of certain federal and/or state agencies and undergo periodic examinations by those regulatory authorities. Substantially all of the Company’s income is generated from banking operations. The accompanying unaudited consolidated interim financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) and reflect all adjustments that are, in the opinion of management, necessary for the fair presentation of the financial position and results of operations for the periods presented. All such adjustments are of a normal recurring nature other than the reclassifications outlined below. We have also reclassified certain prior year amounts to conform to prior periods, which did not have a material impact on our consolidated financial condition or results of operations. The unaudited interim consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ending September 30, 2014 , which includes a description of significant accounting policies. The results of operations for interim periods are not necessarily indicative of the results that may be expected for the year or any other period. The accompanying unaudited consolidated financial statements include the accounts and results of operations of the Company and its subsidiaries after elimination of all significant intercompany accounts and transactions. The preparation of unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates. The Company has evaluated all events or transactions that occurred through the date the Company issued these financial statements. During this period, the Company did not have any material recognizable or non-recognizable subsequent events other than outlined below. Prior to the initial public offering of shares of its common stock in October 2014, the Company was an indirect wholly-owned subsidiary of NAB. NAB sold 18.4 million shares, representing 31.8% of the Company's common stock, in the initial public offering. On May 6, 2015, NAB sold 23.0 million shares of the Company's common stock, representing 39.7% of the Company's common stock, in the second stage of its planned divestment. After completion of the May 6, 2015 offering, NAB beneficially owned 28.5% of the Company's outstanding common stock. On July 31, 2015, NAB sold all of its remaining shares of the Company's common stock in a secondary public offering of 13,819,596 shares and a concurrent share repurchase transaction in which the Company acquired 2,666,518 shares from NAB to fully divest its ownership. On July 27, 2015, the board of directors of the Company declared a dividend of $0.12 per common share payable on August 28, 2015 to owners of record as of close of business on August 14, 2015. On July 31, 2015, we repaid $41.3 million of outstanding subordinated capital notes and revolving lines of credit with NAB with a combination of available cash and the proceeds of a $35 million private placement of subordinated debt. Changes in the Presentation of Results for Loans at Fair Value and Related Derivatives In the normal course of business, the Company manages interest rate risk by entering into fixed-to-floating interest rate swaps related to all fixed-rate loans with original terms longer than five years. The Company has elected to account for these loans using the Fair Value Option. During the first quarter of fiscal year 2015, the Company identified an immaterial error in its reporting of one aspect of the derivatives related to these loans and also elected to change the presentation of the reported changes in fair value of these loans and related derivatives, each as discussed below. The Company's previous consolidated financial statements have been corrected or reclassified, as appropriate, to be consistent with the accompanying unaudited consolidated financial statements. During the first quarter of fiscal year 2015, the Company identified that the current realized gain (loss) on the derivatives related to fair value loans has been improperly recorded as loan interest income instead of being presented in the same line item as the unrealized gain (loss) on the derivatives. As such, the realized gain (loss) on the derivatives related to fair value loans has been moved from loan interest income to "Net realized and unrealized gain (loss) on derivatives" within noninterest income. The Company has determined these corrections to be immaterial to the prior period financial statements and there was no effect on net income, equity or cash flows. The following table reflects the impact of the matter described above on previously filed financial statements: Previously Reported Currently Reported Interest Income Noninterest Income Nine months ended June 30, 2014 Realized (loss) on derivatives $ (13,277 ) $ (13,277 ) Nine months ended June 30, 2013 Realized (loss) on derivatives $ (10,207 ) $ (10,207 ) Twelve months ended September 30, 2014 Realized (loss) on derivatives $ (18,255 ) $ (18,255 ) Twelve months ended September 30, 2013 Realized (loss) on derivatives $ (14,217 ) $ (14,217 ) Twelve months ended September 30, 2012 Realized (loss) on derivatives $ (9,931 ) $ (9,931 ) Additionally, the Company previously reported the changes in fair value of these loans related to both interest rates and credit quality in interest income and the Company presented the changes in fair value of the derivatives in noninterest expense. Changes in fair value related to interest rates on the loans and changes in fair value of the derivatives were completely offset in any reporting period. To improve the clarity and comparability of its financial statements, the Company has elected to change its presentation of the changes in fair value related to these loans and derivatives by presenting these changes in two separate line items in noninterest income. As such, changes in fair value related to these loans, both related to interest rates and credit quality, is presented in "Net increase (decrease) in fair value of loans at fair value" within noninterest income, and changes in fair value related to these derivatives is presented in "Net realized and unrealized gain (loss) on derivatives" within noninterest income. The following table reflects the impact of the matter described above on previously filed financial statements: Previously Reported Currently Reported Interest Income Noninterest Expense Noninterest Income Nine months ended June 30, 2014 Unrealized loss on derivatives $ — $ 12,119 $ — $ 12,119 Loan fair value change related to interest rates (12,119 ) — (12,119 ) — Loan fair value change related to credit quality (1,387 ) — (1,387 ) — $ (13,506 ) $ 12,119 $ (13,506 ) $ 12,119 Nine months ended June 30, 2013 Unrealized (gain) on derivatives $ — $ (41,635 ) $ — $ (41,635 ) Loan fair value change related to interest rates 41,635 — 41,635 — Loan fair value change related to credit quality 141 — 141 — $ 41,776 $ (41,635 ) $ 41,776 $ (41,635 ) Twelve months ended September 30, 2014 Unrealized loss on derivatives $ — $ 11,922 $ — $ 11,922 Loan fair value change related to interest rates (11,922 ) — (11,922 ) — Loan fair value change related to credit quality 18 — 18 — $ (11,904 ) $ 11,922 $ (11,904 ) $ 11,922 Twelve months ended September 30, 2013 Unrealized (gain) on derivatives $ — $ (40,305 ) $ — $ (40,305 ) Loan fair value change related to interest rates 40,305 — 40,305 — Loan fair value change related to credit quality 855 — 855 — $ 41,160 $ (40,305 ) $ 41,160 $ (40,305 ) Twelve months ended September 30, 2012 Unrealized loss on derivatives $ — $ 19,369 $ — $ 19,369 Loan fair value change related to interest rates (19,369 ) — (19,369 ) — Loan fair value change related to credit quality 4,276 — 4,276 — $ (15,093 ) $ 19,369 $ (15,093 ) $ 19,369

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Jun. 30, 2015
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements There have been no new applicable accounting pronouncements issued during the nine months ended June 30, 2015 .

Restrictions on Cash and Due fr

Restrictions on Cash and Due from Banks	9 Months Ended
	Jun. 30, 2015
Cash and Cash Equivalents [Abstract]
Restrictions on Cash and Due from Banks	Restrictions on Cash and Due from Banks The Company is required to maintain reserve balances in cash and on deposit with the Federal Reserve based on a percentage of deposits. The total requirement was approximately $42.9 million and $50.4 million at June 30, 2015 and September 30, 2014 , respectively.

Securities Available for Sale

Securities Available for Sale	9 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Securities Available for Sale	Securities Available for Sale The amortized cost and approximate fair value of investments in securities, all of which are classified as available for sale according to management’s intent, are summarized as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value As of June 30, 2015 U.S. Treasury securities $ 300,501 $ 2,744 $ (113 ) $ 303,132 U.S. Agency securities 74,379 53 (57 ) 74,375 Mortgage-backed securities: Government National Mortgage Association 905,660 2,952 (7,055 ) 901,557 Federal National Mortgage Association 47,727 — (377 ) 47,350 Small Business Assistance Program 77,122 — (1,003 ) 76,119 States and political subdivision securities 1,864 — — 1,864 Corporate debt securities 4,996 34 — 5,030 Other 1,006 42 — 1,048 $ 1,413,255 $ 5,825 $ (8,605 ) $ 1,410,475 Amortized Cost Gross Gross Fair Value As of September 30, 2014 U.S. Treasury securities $ 222,868 $ 31 $ (174 ) $ 222,725 U.S. Agency securities — — — — Mortgage-backed securities: Government National Mortgage Association 1,113,363 4,639 (14,587 ) 1,103,415 Federal National Mortgage Association — — — — Small Business Assistance Program — — — — States and political subdivision securities 2,188 1 — 2,189 Corporate debt securities 11,732 141 — 11,873 Other 1,006 34 — 1,040 $ 1,351,157 $ 4,846 $ (14,761 ) $ 1,341,242 The amortized cost and approximate fair value of debt securities available for sale as of June 30, 2015 and September 30, 2014 , by contractual maturity, are shown below. Maturities of mortgage-backed securities may differ from contractual maturities because the mortgages underlying the securities may be called or repaid without any penalties. June 30, 2015 September 30, 2014 (In Thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 75,053 $ 75,050 $ 7,207 $ 7,218 Due after one year through five years 305,648 308,312 223,282 223,140 Due after five years through ten years 1,039 1,039 6,299 6,429 381,740 384,401 236,788 236,787 Mortgage-backed securities 1,030,509 1,025,026 1,113,363 1,103,415 Securities without contractual maturities 1,006 1,048 1,006 1,040 $ 1,413,255 $ 1,410,475 $ 1,351,157 $ 1,341,242 Proceeds from sales of securities available for sale were $0.0 million and $0.0 million for the three months ended June 30, 2015 and 2014 , respectively, and $55.1 million and $4.5 million for the nine months ended June 30, 2015 and 2014 , respectively. There were no sales of available for sale securities for the three months ended June 30, 2015 and 2014 , and no gross gains or gross losses were realized. Gross gains of $0.6 million and $0.0 million and gross losses of $0.5 million and $0.0 million were realized on the sales for the nine months ended June 30, 2015 and 2014 , respectively, using the specific identification method. Securities with a carrying value of approximately $974.2 million and $1,132.3 million at June 30, 2015 and September 30, 2014 , respectively, were pledged as collateral on public deposits, securities sold under agreements to repurchase, and for other purposes as required or permitted by law. The counterparties do not have the right to sell or pledge the securities the Company has pledged as collateral. As detailed in the following tables, certain investments in debt securities, which are approximately 52% and 64% of the Company’s investment portfolio at June 30, 2015 and September 30, 2014 , respectively, are reported in the consolidated financial statements at an amount less than their amortized cost. Based on evaluation of available evidence, including recent changes in market interest rates, credit rating information, implicit or explicit government guarantees, and information obtained from regulatory filings, management believes the declines in fair value of these securities are temporary. As the Company does not intend to sell the securities and it is not more likely than not that the Company will be required to sell the securities before the recovery of their amortized cost basis, which may be maturity, the Company does not consider the securities to be other than temporarily impaired at June 30, 2015 or September 30, 2014 . The Company did not recognize any other-than-temporary impairment for the three and nine months ended June 30, 2015 and 2014 . The following table presents the Company’s gross unrealized losses and approximate fair value in investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands): Less than 12 months June 30, 2015 Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 18,364 $ (113 ) $ — $ — $ 18,364 $ (113 ) U. S. Agency securities 49,577 (57 ) — — 49,577 (57 ) Mortgage-backed securities 161,004 (1,607 ) 507,944 (6,828 ) 668,948 (8,435 ) $ 228,945 $ (1,777 ) $ 507,944 $ (6,828 ) $ 736,889 $ (8,605 ) Less than 12 months September 30, 2014 Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 98,344 $ (174 ) $ — $ — $ 98,344 $ (174 ) U.S. Agency securities — — — — — — Mortgage-backed securities 24,625 (125 ) 730,171 (14,462 ) 754,796 (14,587 ) $ 122,969 $ (299 ) $ 730,171 $ (14,462 ) $ 853,140 $ (14,761 ) As of June 30, 2015 and September 30, 2014, the Company had 47 and 49 securities, respectively, in an unrealized loss position. The Company’s investments in nonmarketable equity securities are all stock of the Federal Home Loan Bank ("FHLB"). The carrying value of Federal Home Loan Bank stock was $36.3 million and $35.9 million as of June 30, 2015 and September 30, 2014 , respectively, and is reported in other assets on the consolidated balance sheets. No indicators of impairment related to FHLB stock were identified during the three and nine months ended June 30, 2015 and 2014 . The components of other comprehensive income from net unrealized gains (losses) on securities available for sale for the three and nine months ended June 30, 2015 and 2014 , respectively are as follows (in thousands): Three Months Ended Nine Months Ended June 30, 2015 2014 2015 2014 Beginning balance accumulated other comprehensive income (loss) $ 2,111 $ (7,214 ) $ (6,157 ) $ (7,081 ) Net unrealized holding gain (loss) arising during the period (6,099 ) 7,752 7,186 7,363 Reclassification adjustment for net gain realized in net income — — (51 ) (6 ) Net change in unrealized gain (loss) before income taxes (6,099 ) 7,752 7,135 7,357 Income tax (expense) benefit 2,254 (2,946 ) (2,712 ) (2,684 ) Net change in unrealized gain (loss) on securities after taxes (3,845 ) 4,806 4,423 4,673 Ending balance accumulated other comprehensive income (loss) $ (1,734 ) $ (2,408 ) $ (1,734 ) $ (2,408 )

Loans

Loans	9 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Loans	Loans The composition of net loans as of June 30, 2015 and September 30, 2014 , is as follows (in thousands): June 30, 2015 September 30, 2014 Residential real estate $ 922,481 $ 901,605 Commercial real estate 2,720,993 2,541,194 Commercial non real estate 1,701,024 1,571,640 Agriculture 1,813,330 1,681,209 Consumer 75,311 90,086 Other 38,901 34,243 7,272,040 6,819,977 Less: Allowance for loan losses (55,930 ) (47,518 ) Unamortized discount on acquired loans (20,356 ) (25,638 ) Unearned net deferred fees and costs and loans in process (6,445 ) (6,872 ) $ 7,189,309 $ 6,739,949 The loan breakouts above include loans covered by FDIC loss sharing agreements totaling $102.2 million and $234.0 million as of June 30, 2015 and September 30, 2014 , respectively, residential real estate loans held for sale totaling $9.2 million and $10.4 million at June 30, 2015 and September 30, 2014 , respectively, and $1,063.7 million and $985.4 million of loans and written loan commitments accounted for at fair value as of June 30, 2015 and September 30, 2014 , respectively. Unamortized net deferred fees and costs totaled $6.8 million and $6.3 million as of June 30, 2015 and September 30, 2014 , respectively. Loans in process represent loans that have been funded as of the balance sheet dates but not classified into a loan category and loan payments received as of the balance sheet dates that have not been applied to individual loan accounts. Loans in process totaled $(0.4) million and $0.6 million as of June 30, 2015 and September 30, 2014 , respectively. Loans guaranteed by agencies of the U.S. government totaled $108.6 million and $106.5 million at June 30, 2015 and September 30, 2014 , respectively. Principal balances of residential real estate loans sold totaled $79.5 million and $58.4 million for the three months ended June 30, 2015 and 2014 , respectively and $213.4 million and $146.3 million for the nine months ended June 30, 2015 and 2014 , respectively. The following table presents the Company’s nonaccrual loans at June 30, 2015 and September 30, 2014 (in thousands), excluding loans covered under the FDIC loss-sharing agreements. Loans greater than 90 days past due and still accruing interest as of June 30, 2015 and September 30, 2014 , were not significant. Nonaccrual loans June 30, 2015 September 30, 2014 Residential real estate $ 7,846 $ 6,671 Commercial real estate 22,000 20,767 Commercial non real estate 8,198 4,908 Agriculture 21,709 11,453 Consumer 90 146 Total $ 59,843 $ 43,945 The following table (in thousands) presents the Company’s past due loans at June 30, 2015 and September 30, 2014 . This table is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014 . As of June 30, 2015 30-59 Days Past Due 60-89 Days Past Due Greater Than 90 Days Total Past Due Current Total Financing Receivables Residential real estate $ 734 $ 644 $ 3,484 $ 4,862 $ 806,716 $ 811,578 Commercial real estate 5,194 1,313 4,327 10,834 2,402,342 2,413,176 Commercial non real estate 1,867 121 5,213 7,201 1,257,382 1,264,583 Agriculture 1,650 221 7,470 9,341 1,472,970 1,482,311 Consumer 128 196 37 361 74,903 75,264 Other — — — — 38,901 38,901 9,573 2,495 20,531 32,599 6,053,214 6,085,813 Loans covered by FDIC loss sharing agreements 1,267 371 1,012 2,650 99,553 102,203 Total $ 10,840 $ 2,866 $ 21,543 $ 35,249 $ 6,152,767 $ 6,188,016 As of September 30, 2014 30-59 Days 60-89 Days 90 Days or Greater Past Due Total Current Total Residential real estate $ 675 $ 611 $ 2,581 $ 3,867 $ 760,887 $ 764,754 Commercial real estate 11,050 819 3,384 15,253 1,988,585 2,003,838 Commercial non real estate 1,761 6,228 744 8,733 1,303,925 1,312,658 Agriculture 16 368 4,205 4,589 1,364,960 1,369,549 Consumer 244 18 49 311 89,528 89,839 Other — — — — 34,243 34,243 13,746 8,044 10,963 32,753 5,542,128 5,574,881 Loans covered by FDIC loss sharing agreements 1,960 1,252 3,728 6,940 227,096 234,036 Total $ 15,706 $ 9,296 $ 14,691 $ 39,693 $ 5,769,224 $ 5,808,917 The composition of the loan portfolio by internally assigned grade is as follows as of June 30, 2015 and September 30, 2014 . This table (in thousands) is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014 : As of June 30, 2015 Residential Real Estate Commercial Real Estate Commercial Non Real Estate Agriculture Consumer Other Total Credit Risk Profile by Internally Assigned Grade Grade: Pass $ 794,153 $ 2,260,026 $ 1,147,017 $ 1,262,624 $ 74,951 $ 38,901 $ 5,577,672 Watchlist 5,142 98,836 51,606 166,583 89 — 322,256 Substandard 11,895 54,109 64,768 51,761 223 — 182,756 Doubtful 384 205 1,192 1,112 1 — 2,894 Loss 4 — — 231 — — 235 Ending balance 811,578 2,413,176 1,264,583 1,482,311 75,264 38,901 6,085,813 Loans covered by FDIC loss sharing agreements 102,203 — — — — — 102,203 Total $ 913,781 $ 2,413,176 $ 1,264,583 $ 1,482,311 $ 75,264 $ 38,901 $ 6,188,016 As of September 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Credit Risk Profile by Internally Assigned Grade Grade: Pass $ 747,485 $ 1,867,866 $ 1,218,558 $ 1,202,145 $ 89,197 $ 34,243 $ 5,159,494 Watchlist 5,320 84,132 65,628 132,262 381 — 287,723 Substandard 11,290 51,692 27,499 35,107 242 — 125,830 Doubtful 659 148 798 35 19 — 1,659 Loss — — 175 — — — 175 Ending balance 764,754 2,003,838 1,312,658 1,369,549 89,839 34,243 5,574,881 Loans covered by FDIC loss sharing agreements 127,115 95,467 9,390 2,004 60 — 234,036 Total $ 891,869 $ 2,099,305 $ 1,322,048 $ 1,371,553 $ 89,899 $ 34,243 $ 5,808,917 Impaired Loans The following table presents the Company’s impaired loans (in thousands). This table excludes loans covered by FDIC loss sharing agreements: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment As of June 30, 2015 Impaired loans: With an allowance recorded: Residential real estate $ 12,481 $ 12,678 $ 2,582 $ 12,294 Commercial real estate 77,015 78,947 3,006 69,585 Commercial non real estate 68,694 78,557 6,733 50,608 Agriculture 53,104 53,541 3,743 44,316 Consumer 224 312 45 252 $ 211,518 $ 224,035 $ 16,109 $ 177,055 Recorded Unpaid Related Average As of September 30, 2014 Impaired loans: With an allowance recorded: Residential real estate $ 12,107 $ 12,737 $ 2,529 $ 13,572 Commercial real estate 62,155 64,597 2,017 84,490 Commercial non real estate 35,522 37,882 3,927 31,827 Agriculture 35,528 37,958 1,155 30,546 Consumer 280 491 51 346 $ 145,592 $ 153,665 $ 9,679 $ 160,781 There are no impaired loans without a valuation allowance, other than those loans for which the Company has claim to collateral with value(s) in excess of the outstanding loan amount, after allowing for the cost of liquidating the collateral as of June 30, 2015 and September 30, 2014 . The average recorded investment on impaired loans for the three months ended June 30, 2015 and 2014 totaled $192.6 million and $165.2 million , respectively, and $177.0 million and $170.5 million for the nine months ended June 30, 2015 and 2014, respectively. Interest income recognized on impaired loans for the three months ended June 30, 2015 and 2014 totaled $2.3 million and $1.2 million , respectively and $7.1 million and $4.6 million for the nine months ended June 30, 2015 and 2014 , respectively. Valuation adjustments made to repossessed properties for the three months ended June 30, 2015 and 2014 , totaled $1.2 million and $8.2 million , respectively, and $5.6 million and $9.3 million for the nine months ended June 30, 2015 and 2014 , respectively. The adjustments are included in other noninterest expense. Troubled Debt Restructured Loans Included in certain loan categories in the impaired loans are troubled debt restructurings (“TDRs”) that were classified as impaired. These TDRs do not include purchased impaired loans. When the Company grants concessions to borrowers such as reduced interest rates or extensions of loan periods that would not be considered other than because of borrowers’ financial difficulties, the modification is considered a TDR. Specific reserves included in the allowance for loan losses for TDRs were $3.0 million and $3.2 million at June 30, 2015 and September 30, 2014 , respectively. Commitments to lend additional funds to borrowers whose loans were modified in a TDR were not significant as of June 30, 2015 or September 30, 2014 . The following table presents the recorded value of the Company’s TDR balances as of June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Accruing Nonaccrual Accruing Nonaccrual Residential real estate $ 668 $ 1,536 $ 1,112 $ 1,730 Commercial real estate 44,170 4,680 25,177 6,884 Commercial non real estate 9,961 1,101 6,753 1,785 Agriculture 80 7,440 3,780 9,994 Consumer 37 7 35 22 Total $ 54,916 $ 14,764 $ 36,857 $ 20,415 The following table presents a summary of all accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014 , respectively: Three Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Modification Post- Modification Number Pre- Modification Post- Modification Residential real estate Rate modification — $ — $ — — $ — $ — Term extension 1 35 35 — — — Payment modification — — — 1 35 35 Bankruptcy — — — — — — Other — — — — — — Total residential real estate 1 35 35 1 35 35 Commercial real estate Rate modification — — — — — — Term extension 1 574 574 — — — Payment modification — — — 1 1,841 1,841 Bankruptcy — — — — — — Other — — — — — — Total commercial real estate 1 574 574 1 1,841 1,841 Commercial non real estate Rate modification — — — — — — Term extension — — — 1 79 79 Payment modification — — — 1 2,182 2,182 Bankruptcy — — — — — — Other — — — 1 2 2 Total commercial non real estate — — — 3 2,263 2,263 Agriculture Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — — — — Consumer Rate modification — — — — — — Term extension — — — — — — Payment modification 1 18 18 1 11 11 Bankruptcy — — — — — — Other — — — — — — Total consumer 1 18 18 1 11 11 Total accruing 3 $ 627 $ 627 6 $ 4,150 $ 4,150 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification — $ — $ — — $ — $ — The following table presents a summary of all accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014 : Nine Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Post- Number Pre- Post- Residential real estate Rate modification 1 $ 15 $ 15 — $ — $ — Term extension 1 35 35 2 74 74 Payment modification — — — 2 50 50 Bankruptcy — — — 1 130 130 Other 1 21 21 — — — Total residential real estate 3 71 71 5 254 254 Commercial real estate Rate modification — — — — — — Term extension 2 664 574 — — — Payment modification 6 22,542 22,542 2 2,911 2,911 Bankruptcy 1 498 498 — — — Other — — — — — — Total commercial real estate 9 23,704 23,614 2 2,911 2,911 Commercial non real estate Rate modification 1 32 32 — — — Term extension 3 2,879 2,879 5 1,813 1,813 Payment modification 2 1,874 1,874 5 2,917 2,917 Bankruptcy — — — — — — Other — — — 2 329 329 Total commercial non real estate 6 4,785 4,785 12 5,059 5,059 Agriculture Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — — — — Consumer Rate modification — — — — — — Term extension — — — — — — Payment modification 1 18 18 3 15 15 Bankruptcy 1 6 6 — — — Other — — — 2 28 28 Total consumer 2 24 24 5 43 43 Total accruing 20 $ 28,584 $ 28,494 24 $ 8,267 $ 8,267 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification 1 $ 90 $ — — $ — $ — The following table presents a summary of all non-accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014 : Three Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Modification Post- Modification Number Pre- Modification Post- Modification Residential real estate Rate modification — $ — $ — — $ — $ — Term extension 1 — — 1 8 8 Payment modification 1 19 19 1 11 11 Bankruptcy — — — — — — Other 1 25 10 — — — Total residential real estate 3 44 29 2 19 19 Commercial real estate Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total commercial real estate — — — — — — Commercial Non Real Estate Rate modification — — — — — — Term extension 1 77 — — — — Payment modification 1 4 4 1 36 36 Bankruptcy — — — — — — Other — — — — — — Total commercial non real estate 2 81 4 1 36 36 Agriculture Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — — — — Consumer Rate modification — — — — — — Term extension 1 1 1 — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total consumer 1 1 1 — — — Total non-accruing 6 $ 126 $ 34 3 $ 55 $ 55 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification 2 $ 92 $ — — $ — $ — The following table presents a summary of all non-accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014 : Nine Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Post- Number Pre- Post- Residential real estate Rate modification 2 $ 104 $ 104 4 $ 98 $ 98 Term extension 2 77 77 3 26 26 Payment modification 1 19 19 1 11 11 Bankruptcy 1 43 43 1 4 4 Other 1 25 10 1 38 38 Total residential real estate 7 268 253 10 177 177 Commercial real estate Rate modification — — — 2 500 500 Term extension — — — 2 4,031 4,031 Payment modification — — — — — — Bankruptcy — — — — — — Other — — — 1 87 87 Total commercial real estate — — — 5 4,618 4,618 Commercial Non Real Estate Rate modification — — — — — — Term extension 5 294 217 8 125 125 Payment modification 1 4 4 1 36 36 Bankruptcy — — — 1 10 10 Other — — — — — — Total commercial non real estate 6 298 221 10 171 171 Agriculture Rate modification — — — — — — Term extension — — — 2 260 260 Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — 2 260 260 Consumer Rate modification — — — — — — Term extension 2 2 2 1 11 11 Payment modification — — — — — — Bankruptcy — — — — — — Other — — — 1 1 1 Total consumer 2 2 2 2 12 12 Total non-accruing 15 $ 568 $ 476 29 $ 5,238 $ 5,238 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification 2 $ 92 $ — — $ — $ — The tables below represent defaults on loans that were first modified during the respective past 12 months, that became 90 days or more delinquent or were charged-off during the three and nine months ended June 30, 2015 and 2014 , respectively. Three Months Ended 2015 2014 ($ in thousands) Number of Loans Recorded Investment Number of Loans Recorded Investment Residential real estate 1 $ 10 — $ — Commercial real estate — — — — Commercial non real estate 2 32 1 15 Agriculture 3 782 — — Consumer — — — — 6 $ 824 1 $ 15 Nine Months Ended 2015 2014 ($ in thousands) Number of Recorded Number of Recorded Residential real estate 4 $ 353 2 $ 337 Commercial real estate — — 2 7,053 Commercial non real estate 4 32 4 537 Agriculture 3 782 7 7,361 Consumer — — — — 11 $ 1,167 15 $ 15,288 The majority of loans that were modified and subsequently became 90 days or more delinquent have remained on nonaccrual status since the time of modification.

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses The following tables presents the Company’s allowance for loan losses roll forward for the three and nine month periods ended June 30, 2015 and 2014 . Three Months Ended June 30, 2015 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance April 1, $ 7,495 $ 15,736 $ 15,957 $ 12,222 $ 189 $ 827 $ 52,426 Charge-offs (77 ) (280 ) (1,337 ) (411 ) (31 ) (356 ) (2,492 ) Recoveries 84 205 949 10 32 306 1,586 Provision (325 ) 2,130 1,381 1,545 164 96 4,991 (Impairment) improvement of (625 ) 45 — — (1 ) — (581 ) Ending balance June 30, 2015 $ 6,552 $ 17,836 $ 16,950 $ 13,366 $ 353 $ 873 $ 55,930 Three Months Ended June 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance April 1, 2014 $ 10,277 $ 17,603 $ 10,275 $ 7,903 $ 430 $ 665 $ 47,153 Charge-offs (144 ) (539 ) (1,884 ) (566 ) (39 ) (198 ) (3,370 ) Recoveries 94 497 469 14 69 612 1,755 Provision 187 494 727 389 (68 ) (229 ) 1,500 (Impairment) improvement of — — — — — — — Ending balance June 30, 2014 $ 10,414 $ 18,055 $ 9,587 $ 7,740 $ 392 $ 850 $ 47,038 Nine Months Ended June 30, 2015 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance October 1, $ 8,342 $ 16,884 $ 10,550 $ 10,655 $ 264 $ 823 $ 47,518 Charge-offs (197 ) (1,932 ) (9,861 ) (438 ) (88 ) (1,187 ) (13,703 ) Recoveries 197 300 3,092 89 79 950 4,707 Provision (515 ) 2,476 13,169 3,060 123 287 18,600 (Impairment) improvement of (1,275 ) 108 — — (25 ) — (1,192 ) Ending balance June 30, 2015 $ 6,552 $ 17,836 $ 16,950 $ 13,366 $ 353 $ 873 $ 55,930 Nine Months Ended June 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance October 1, $ 11,779 $ 22,562 $ 11,222 $ 9,296 $ 312 $ 693 $ 55,864 Charge-offs (581 ) (3,733 ) (2,883 ) (2,652 ) (191 ) (1,154 ) (11,194 ) Recoveries 190 1,521 1,228 29 136 1,329 4,433 Provision 201 (2,903 ) 1,461 1,067 67 (18 ) (125 ) (Impairment) improvement of (1,175 ) 608 (1,441 ) — 68 — (1,940 ) Ending balance June 30, 2014 $ 10,414 $ 18,055 $ 9,587 $ 7,740 $ 392 $ 850 $ 47,038 The following tables provide details regarding the allowance for loan and lease losses and balance by type of allowance. These tables (in thousands) are presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million , loans held for sale of $9.2 million , and guaranteed loans of $108.6 million for June 30, 2015 and loans measured at fair value with changes in fair value reported in earnings of $985.4 million , loans held for sale of $10.4 million , and guaranteed loans of $106.5 million for September 30, 2014 . As of June 30, 2015 Residential Commercial Commercial Agriculture Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ 2,581 $ 2,879 $ 6,712 $ 3,743 $ 45 $ — $ 15,960 Collectively evaluated for impairment 2,461 11,952 10,238 9,623 308 873 35,455 Loans acquired with deteriorated credit quality 1,510 1,255 — — — — 2,765 Loans acquired without deteriorated credit quality — 1,750 — — — — 1,750 Total allowance $ 6,552 $ 17,836 $ 16,950 $ 13,366 $ 353 $ 873 $ 55,930 Financing Receivables Individually evaluated for impairment $ 9,125 $ 47,069 $ 67,369 $ 43,113 $ 165 $ — $ 166,841 Collectively evaluated for impairment 709,265 2,225,924 1,140,921 1,411,741 72,421 38,901 5,599,173 Loans acquired with deteriorated credit quality 86,569 23,402 2,889 1,567 1,374 — 115,801 Loans acquired without deteriorated credit quality 98,071 65,918 5,445 17,683 1,304 — 188,421 Loans Outstanding $ 903,030 $ 2,362,313 $ 1,216,624 $ 1,474,104 $ 75,264 $ 38,901 $ 6,070,236 As of September 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ 2,528 $ 1,953 $ 3,909 $ 1,152 $ 51 $ — $ 9,593 Collectively evaluated for impairment 3,030 12,034 6,641 9,503 188 823 32,219 Loans acquired with deteriorated credit quality 2,784 645 — — 25 — 3,454 Loans acquired without deteriorated credit quality — 2,252 — — — — 2,252 Total allowance $ 8,342 $ 16,884 $ 10,550 $ 10,655 $ 264 $ 823 $ 47,518 Financing Receivables Individually evaluated for impairment $ 9,384 $ 38,457 $ 28,298 $ 25,655 $ 166 $ — $ 101,960 Collectively evaluated for impairment 649,970 1,874,474 1,224,035 1,319,343 85,065 34,243 5,187,130 Loans acquired with deteriorated credit quality 102,987 49,202 6,361 1,746 1,843 — 162,139 Loans acquired without deteriorated credit quality 117,630 95,323 7,409 17,655 2,825 — 240,842 Loans Outstanding $ 879,971 $ 2,057,456 $ 1,266,103 $ 1,364,399 $ 89,899 $ 34,243 $ 5,692,071 The reserve for unfunded loan commitments was $0.4 million at both June 30, 2015 and September 30, 2014 .

Accounting for Certain Loans Ac

Accounting for Certain Loans Acquired with Deteriorated Credit Quality	9 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Accounting for Certain Loans Acquired with Deteriorated Credit Quality	Accounting for Certain Loans Acquired with Deteriorated Credit Quality In June 2010 , the Company acquired certain loans that had deteriorated credit quality. Loan accounting specific to these purchased impaired loans addresses differences between contractual cash flows expected to be collected from the initial investment in loans if those differences are attributable, at least in part, to credit quality. Several factors were considered when evaluating whether a loan was considered a purchased impaired loan, including the delinquency status of the loan, updated borrower credit status, geographic information, and updated loan-to-values (“LTV”). U.S. GAAP allows purchasers to aggregate purchased impaired loans acquired in the same fiscal quarter in one or more pools, provided that the loans have common risk characteristics. A pool is then accounted for as a single asset with a single composite interest rate and an aggregate expectation of cash flows. Loan pools are periodically reassessed to determine expected cash flows. In determining the expected cash flows, the timing of cash flows and prepayment assumptions for smaller, homogenous loans are based on statistical models that take into account factors such as the loan interest rate, credit profile of the borrowers, the years in which the loans were originated, and whether the loans are fixed or variable rate loans. Prepayments may be assumed on large individual loans that consider similar prepayment factors listed above for smaller homogenous loans. The re-assessment of purchased impaired loans resulted in the following changes in the accretable yield during the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Balance at beginning of period $ 43,431 $ 56,415 $ 50,889 $ 67,660 Accretion (3,240 ) (4,642 ) (11,249 ) (14,016 ) Reclassification from nonaccretable difference 7,736 227 8,367 3,175 Disposals (1,038 ) (185 ) (1,118 ) (5,004 ) Balance at end of period $ 46,889 $ 51,815 $ 46,889 $ 51,815 The reclassifications from nonaccretable difference noted in the table above represent instances where specific pools of loans are expected to perform better over the remaining lives of the loans than expected at the prior re-assessment date. The following table provides purchased impaired loans at June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Outstanding Balance 1 Recorded Investment 2 Carrying Value 3 Outstanding 1 Recorded 2 Carrying 3 Residential real estate $ 98,677 $ 86,569 $ 85,059 $ 115,863 $ 102,987 $ 100,203 Commercial real estate 100,075 23,402 22,147 130,825 49,202 48,557 Commercial non real estate 11,092 2,889 2,889 16,697 6,361 6,361 Agriculture 1,567 1,567 1,567 1,747 1,746 1,746 Consumer 1,474 1,374 1,374 2,019 1,843 1,818 Total lending $ 212,885 $ 115,801 $ 113,036 $ 267,151 $ 162,139 $ 158,685 1 Represents the legal balance of loans acquired with deteriorated credit quality. 2 Represents the book balance of loans acquired with deteriorated credit quality. 3 Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses. Due to improved cash flows of the purchased impaired loans, the reductions to allowance recognized on previous impairments were $0.9 million and $0.0 million for the three months ended June 30, 2015 and 2014 , respectively and $1.9 million and $3.6 million for the nine months ended June 30, 2015 and 2014 , respectively.

FDIC Indemnification Asset

FDIC Indemnification Asset	9 Months Ended
	Jun. 30, 2015
Banking and Thrift [Abstract]
FDIC Indemnification Asset	FDIC Indemnification Asset Under the terms of the purchase and assumption agreement with the FDIC with regard to the TierOne Bank acquisition, the Company is reimbursed for a portion of the losses incurred on covered assets. As covered assets are resolved, whether it be through repayment, short sale of the underlying collateral, the foreclosure on or sale of collateral, or the sale or charge-off of loans or OREO, any differences between the carrying value of the covered assets versus the payments received during the resolution process, that are reimbursable by the FDIC, are recognized as reductions in the FDIC indemnification asset. Any gains or losses realized from the resolution of covered assets reduce or increase, respectively, the amount recoverable from the FDIC. The following table represents a summary of the activity related to the FDIC indemnification asset for the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Balance at beginning of period $ 19,895 $ 37,775 $ 26,678 $ 45,690 Amortization (1,754 ) (3,256 ) (6,347 ) (11,203 ) Changes in expected reimbursements from FDIC for changes in expected credit losses 15 958 (175 ) 550 Changes in reimbursable expenses (1,148 ) (280 ) (1,511 ) 2,525 Payments to/(from) the FDIC (29 ) (2,965 ) (1,666 ) (5,330 ) Balance at end of period $ 16,979 $ 32,232 $ 16,979 $ 32,232 The loss claims filed are subject to review, approval, and annual audits by the FDIC or its assigned agents for compliance with the terms in the loss sharing agreements. The commercial loss share agreement claim period ended on June 4, 2015. The non-commerical loss share agreement ends June 4, 2020.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments In the normal course of business, the Company uses interest rate swaps to manage its interest rate risk and market risk in accommodating the needs of its customers. Also, the Company enters into interest rate lock commitments on mortgage loans to be held for sale, with corresponding forward sales contracts related to these interest rate lock commitments. Derivative instruments are recognized as either assets or liabilities in the accompanying consolidated financial statements and are measured at fair value. The following table summarizes the notional amounts and estimated fair values of the Company’s derivative instruments at June 30, 2015 and September 30, 2014 (in thousands). June 30, 2015 Notional Balance Sheet Positive Fair Negative Fair Derivatives not designated as hedging instruments: Interest rate swaps $ 1,065,703 Liabilities $ 2,867 $ (27,292 ) Mortgage loan commitments 33,626 Assets 1 — Mortgage loan forward sale contracts 38,882 Liabilities — (1 ) September 30, 2014 Notional Balance Sheet Positive Fair Negative Fair Derivatives not designated as hedging instruments: Interest rate swaps $ 986,440 Liabilities $ 6,213 $ (19,286 ) Mortgage loan commitments 22,563 Assets 19 — Mortgage loan forward sale contracts 28,459 Liabilities — (19 ) As with any financial instrument, derivative financial instruments have inherent risk including adverse changes in interest rates. The Company’s exposure to derivative credit risk is defined as the possibility of sustaining a loss due to the failure of the counterparty to perform in accordance with the terms of the contract. Credit risks associated with interest rate swaps are similar to those relating to traditional on-balance sheet financial instruments. The Company manages interest rate swap credit risk with the same standards and procedures applied to its commercial lending activities. Amounts due from swap counterparties to reclaim cash collateral under the interest rate swap master netting arrangements have not been offset against the derivative balances. The effect of derivatives on the consolidated statements of comprehensive income for the three and nine months ended June 30, 2015 and 2014 (in thousands) was as follows: Amount of Gain (Loss) Recognized in Income Three Months Ended Nine Months Ended Location of 2015 2014 2015 2014 Derivatives not designated as hedging instruments: Interest rate swaps Noninterest income $ 18,946 $ (17,797 ) $ (27,357 ) $ (25,396 ) Mortgage loan commitments Noninterest income (26 ) 6 1 40 Mortgage loan forward sale contracts Noninterest income 26 (6 ) (1 ) (40 ) Netting of Derivatives The Company has various financial assets and financial liabilities that are subject to enforceable master netting agreements or similar agreements. The Company has entered into an ISDA master netting arrangement with various swap counterparties. Under the terms of the master netting arrangements, all transactions between the Company and the counterparty constitute a single business relationship such that in the event of default, the non-defaulting party is entitled to set off claims and apply property held by that party in respect of any transaction against obligations owed. Any payments, deliveries, or other transfers may be applied against each other and netted. The table below shows total gross derivative assets and liabilities which are adjusted on an aggregate basis, where applicable to take into consideration the effects of legally enforceable master netting agreements for the net reported amount in the consolidated balance sheets. These amounts are offset on the consolidated balance sheets. The following tables (in thousands) present the Company's gross derivative financial assets and liabilities at June 30, 2015 and September 30, 2014 , and the related impact of enforceable master netting arrangements and cash collateral, where applicable: Gross Amount Amount Offset Net Amount Presented in Consolidated Balance Sheets Held/Pledged Financial Instruments 1 Net Amount June 30, 2015 Derivative financial assets: Derivatives subject to master netting arrangement or similar arrangement $ 2,867 $ (2,867 ) $ — $ — $ — Derivative financial liabilities: Derivatives subject to master netting arrangement or similar arrangement (27,292 ) 2,867 (24,425 ) 24,425 — Total derivative financial liabilities $ (24,425 ) $ — $ (24,425 ) $ 24,425 $ — 1 The actual amount of collateral exceeds the fair value exposure, at the individual counterparty level, as of the date presented. Gross Amount Net Amount Held/Pledged Net September 30, 2014 Derivative financial assets: Derivatives subject to master netting arrangement or similar arrangement $ 6,213 $ (6,213 ) $ — $ — $ — Derivative financial liabilities: Derivatives subject to master netting arrangement or similar arrangement (19,286 ) 6,213 (13,073 ) 13,073 — Total derivative financial liabilities $ (13,073 ) $ — $ (13,073 ) $ 13,073 $ —

The Fair Value Option

The Fair Value Option	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
The Fair Value Option	The Fair Value Option The Company has elected to measure certain long-term loans and written loan commitments at fair value to assist in managing the interest rate risk for longer-term loans. This fair value option was elected upon the origination of these loans. Interest income is recognized in the same manner as interest on non-fair value loans. See Note 17 for additional disclosures regarding the fair value of the fair value option loans and written loan commitments. Long-term loans and written loan commitments for which the fair value option has been elected had a net favorable difference between the aggregate fair value and the aggregate unpaid loan principal balance and written loan commitment amount of approximately $18.9 million and $7.1 million at June 30, 2015 and September 30, 2014 , respectively. The total unpaid principal balance of these long-term loans was approximately $1,044.7 million and $978.3 million at June 30, 2015 and September 30, 2014 , respectively. The fair value of these loans and written loan commitments is included in total loans in the consolidated balance sheets and are grouped with commercial non real estate, commercial real estate, and agricultural loans in Note 5. The fair value of these written loan commitments was not material at June 30, 2015 and September 30, 2014 , respectively. None of the noted loans were greater than 90 days past due or in nonaccrual status as of June 30, 2015 or September 30, 2014 . Changes in fair value for items for which the fair value option has been elected and the line items in which these changes are reported are as follows for the three and nine months ended June 30, 2015 and 2014 (in thousands): For the Three Months Ended For the Nine Months Ended June 30, 2015 June 30, 2014 June 30, 2015 June 30, 2014 Noninterest Total Changes Noninterest Total Changes Noninterest Total Changes Noninterest Total Changes Long-term loans and written loan commitments $ (24,394 ) $ (24,394 ) $ 13,886 $ 13,886 $ 7,914 $ 7,914 $ 13,506 $ 13,506 Of the total change in fair value of long-term loans and written loan commitments, $0.0 million and $0.7 million for the three months ended June 30, 2015 and 2014 , respectively, and $0.5 million and $1.4 million for the nine months ended June 30, 2015 and 2014 , respectively is attributable to changes in specific credit risk. The gains or losses attributable to changes in instrument-specific credit risk were determined based on an assessment of existing market conditions and credit quality of the underlying loan for the specific portfolio of loans.

Core Deposits and Other Intangi

Core Deposits and Other Intangibles	9 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Core Deposits and Other Intangibles	Core Deposits and Other Intangibles A summary of intangible assets subject to amortization is as follows (in thousands): Core Deposit Intangible Brand Intangible Customer Relationships Intangible Total As of June 30, 2015 Gross carrying amount $ 92,679 $ 8,464 $ 16,089 $ 117,232 Accumulated amortization (91,980 ) (3,995 ) (13,430 ) (109,405 ) Net intangible assets $ 699 $ 4,469 $ 2,659 $ 7,827 As of September 30, 2014 Gross carrying amount $ 92,679 $ 8,464 $ 16,089 $ 117,232 Accumulated amortization (87,423 ) (3,572 ) (12,008 ) (103,003 ) Net intangible assets $ 5,256 $ 4,892 $ 4,081 $ 14,229 Amortization expense of intangible assets was $1.8 million and $4.1 million for the three months ended June 30, 2015 and 2014 , respectively and $6.4 million and $13.4 million for the nine months ended June 30, 2015 and 2014 , respectively. The estimated amortization expense of intangible assets assumes no activities, such as acquisitions, which would result in additional amortizable intangible assets. Estimated amortization expense of intangible assets in subsequent fiscal years is as follows (in thousands): Remaining in 2015 $ 709 2016 2,822 2017 1,097 2018 564 2019 564 2020 and thereafter 2,071 $ 7,827

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Jun. 30, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase generally mature within one to four days from the transaction date. Securities underlying the agreements had an amortized cost of approximately $170.5 million and $190.6 million and fair value of approximately $170.5 million and $188.6 million at June 30, 2015 and September 30, 2014 , respectively. The Company over-collateralizes the repurchase agreements at 102% of total funds borrowed to protect the purchaser from changes in market value. Additionally, the Company utilizes held-in-custody procedures to ensure the securities sold under repurchase agreements are unencumbered. The following tables present the gross obligation by the class of collateral pledged and the remaining contractual maturity of the agreements at June 30, 2015 and September 30, 2014 (in thousands). June 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Repurchase agreements US Treasury and agency $ 52,402 $ — $ — $ — $ 52,402 Mortgage-backed securities 106,209 — — 2,948 109,157 Total repurchase agreements $ 158,611 $ — $ — $ 2,948 $ 161,559 September 30, 2014 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Repurchase agreements US Treasury and agency $ 8,469 $ — $ — $ — $ 8,469 Mortgage-backed securities 149,511 — — 3,707 153,218 Total repurchase agreements $ 157,980 $ — $ — $ 3,707 $ 161,687

FHLB Advances, Related Party No

FHLB Advances, Related Party Notes Payable and Other Borrowings	9 Months Ended
	Jun. 30, 2015
Federal Home Loan Banks [Abstract]
FHLB Advances, Related Party Notes Payable and Other Borrowings	FHLB Advances, Related Party Notes Payable and Other Borrowings FHLB advances, related party notes payable, and other borrowings consist of the following at June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Subordinated capital note to NAB New York (a branch of NAB), due June 2018, interest paid quarterly based on LIBOR plus 205 basis points, unsecured $ 35,795 $ 35,795 $10,000 revolving line of credit to NAB due on demand, interest paid monthly based on LIBOR plus 125 basis points, unsecured 5,500 5,500 Total related party notes payable 41,295 41,295 Notes payable to Federal Home Loan Bank (FHLB), interest rates from 0.21% to 3.66% and maturity dates from February 2016 to July 2023, collateralized by real estate loans and FHLB stock, with various call dates at the option of the FHLB 590,000 575,000 Other 520 94 Total FHLB advances and other borrowings 590,520 575,094 Total borrowings $ 631,815 $ 616,389 As of June 30, 2015 , based on its Federal Home Loan Bank stock holdings, the combined aggregate additional borrowing capacity of the Company with the Federal Home Loan Bank was $676.8 million . Principal balances of loans pledged to the Federal Home Loan Bank to collateralize notes payable totaled $2,232.8 million and $2,145.5 million at June 30, 2015 and September 30, 2014 , respectively. As of June 30, 2015 , FHLB advances, related party notes payable and other borrowings are due or callable (whichever is earlier) in subsequent fiscal years as follows (in thousands): Remaining in 2015 $ 6,020 2016 90,000 2017 25,000 2018 60,795 2019 50,000 2020 and thereafter 400,000 $ 631,815

Income Taxes

Income Taxes	9 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes charged to operations consists of the following for the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Currently paid or payable Federal $ 5,600 $ 16,800 $ 29,611 $ 43,760 State 2,098 2,588 5,575 6,545 7,698 19,388 35,186 50,305 Deferred tax (benefit) expense 7,173 (7,254 ) 3,107 (8,743 ) Income tax expense $ 14,871 $ 12,134 $ 38,293 $ 41,562 The income tax provision differs from the amount of income tax determined by applying the U.S. federal income tax rate to pretax income due to the following for the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Computed “expected” tax expense (35%) $ 15,296 $ 12,122 $ 39,741 $ 41,523 Increase (decrease) in income taxes resulting from: Tax exempt interest income (1,573 ) (1,263 ) (4,789 ) (3,539 ) State income taxes, net of federal benefit 1,363 1,682 3,623 4,254 Other (215 ) (407 ) (282 ) (676 ) Actual tax expense $ 14,871 $ 12,134 $ 38,293 $ 41,562 Net deferred tax assets (liabilities) consist of the following components at June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Deferred tax assets: Allowance for loan losses $ 22,796 $ 19,683 Compensation 705 329 Net operating loss carryforward 81 119 Securities available for sale 1,046 3,758 Other real estate owned 8,880 13,721 Core deposit intangible and other fair value adjustments 11,351 10,573 Excess tax basis of loans acquired over carrying value 4,630 9,595 Other 6,023 6,272 Total deferred tax assets 55,512 64,050 Deferred tax liabilities: Goodwill and other intangibles (11,995 ) (9,099 ) Premises and equipment (3,131 ) (4,390 ) Excess carrying value of FDIC indemnification asset and clawback liability (326 ) (4,280 ) Other (1,176 ) (1,578 ) Total deferred tax liabilities (16,628 ) (19,347 ) Net deferred tax assets $ 38,884 $ 44,703 At June 30, 2015 , the Company had income tax receivable of $1.4 million from the Internal Revenue Service and at September 30, 2014 , had income tax payable of $4.9 million to National Americas Investment, Inc., which was subsequently dissolved (included in income tax payable). Management has determined a valuation reserve is not required for the deferred tax assets because it is more likely than not these assets could be realized through carry back to taxable income in prior years, future reversals of existing taxable temporary differences, and future taxable income. Uncertain tax positions were not significant at June 30, 2015 or September 30, 2014 . The Company is no longer subject to U.S. federal, state and local or non-U.S. income tax examinations by tax authorities for years before 2009. In July 2014, the IRS issued the final report on their examination of federal income tax returns for the periods ended September 30, 2010 and 2011. The results of the examination did not have a material effect on our financial condition or results of operations.

Profit-Sharing Plan

Profit-Sharing Plan	9 Months Ended
	Jun. 30, 2015
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Profit-Sharing Plan	Profit-Sharing Plan The Company participates in a multiple employer 401(k) profit sharing plan (the Plan). All employees are eligible to participate, beginning with the first day of the month coincident with or immediately following the completion of one year of service and having reached the age of 21 . In addition to employee contributions, the Company may contribute discretionary amounts for eligible participants. Contribution rates for participating employees must be equal. The Company contributed $1.1 million and $1.3 million to the Plan for the three months ended June 30, 2015 and 2014 , respectively and $2.9 million and $2.5 million for the nine months ended June 30, 2015 and 2014 , respectively.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation On September 26, 2014, the Board of Directors adopted, and on October 10, 2014 NAB, at that time our controlling shareholder, approved the Great Western Bancorp, Inc. 2014 Omnibus Incentive Compensation Plan (the “2014 Plan”), the Great Western Bancorp, Inc. 2014 Non-Employee Director Plan (the “2014 Director Plan”), and the Great Western Bancorp, Inc. Executive Incentive Compensation Plan (the “Bonus Plan”), collectively ("the Plans"), which provide for the issuance of restricted share units and performance based share units to certain officers, employees and directors of the Company. The Plans were primarily established to enhance the Company’s ability to attract, retain and motivate employees. The Company’s Board of Directors, the Compensation Committee of the Board of Directors ("Compensation Committee"), or executive management upon delegation of the Compensation Committee has exclusive authority to select the employees and others, including directors, to receive the awards and to establish the terms and conditions of each award made pursuant to the Company’s stock-based compensation plans. Stock units issued under the Company’s restricted and performance based stock plans may not be sold or otherwise transferred until the vesting period (typically 3 years) has been met and/or performance objectives have been obtained. During the vesting periods, participants do not have voting rights and dividends are accumulated until the time upon which the award vests. Upon specified events, as defined in the Plans, stock unit awards that have not vested and/or performance hurdles that have not been met will be forfeited. Based on the substantive terms of each award, restricted and performance-based awards are classified as equity awards and accounted for under the Treasury method. The fair value of equity-classified awards is based on the market price of the stock on the measurement date and is amortized as compensation expense on a straight-line basis over the vesting or performance period. Stock based compensation is recognized based on the number of awards that are ultimately expected to vest. Forfeitures are estimated based on historical turnover experience of qualified employees. For performance-based stock awards, an estimate is made of the number of shares expected to vest as a result of actual performance against the performance targets to determine the amount of compensation expense to be recognized. The estimate is reevaluated quarterly and total compensation expense is adjusted for any change in the current period. Stock-based compensation expense is included in salaries and employee benefits expense in the consolidated statements of comprehensive income. For the three months ended June 30, 2015 and 2014 , stock compensation expense was $0.3 million and $0.0 million , respectively. For the nine months ended June 30, 2015 and 2014 , stock compensation expense was $1.0 million and $0.0 million , respectively. Related income tax benefits recognized for the three months ended June 30, 2015 and 2014 were $0.1 million and $0.0 million , respectively and $0.4 million and $0.0 million for the nine months ended June 30, 2015 and 2014 , respectively. The following is a summary of the Plans’ restricted share and performance-based stock award activity as of June 30, 2015 : Restricted Shares Common Shares Weighted-Average Restricted shares, October 1, 2014 — $ — Granted 81,419 18.18 Vested and issued — — Forfeited (556 ) 18.00 Canceled — — Restricted shares, June 30, 2015 80,863 $ 18.18 Vested, but not issuable at June 30, 2015 12,221 $ 18.00 Performance Shares Performance shares, October 1, 2014 — $ — Granted 221,294 18.00 Vested and issued — — Forfeited (7,761 ) 18.00 Canceled — — Performance shares, June 30, 2015 213,533 $ 18.00 The number of performance shares granted is reflected in the above table at the 100% target performance level. The actual performance-based award payouts will vary based on the achievement of the pre-established targets and can range from 0% to 150% of the target amount. The outstanding number of performance shares reflected in the table represents the number of shares expected to be awarded based on estimated achievement of the goals as of year end. However, at June 30, 2015 , the maximum number of performance-based shares that could be issued if performance is attained at 150% of target based on the grants made to date was approximately 320,300 shares. As of June 30, 2015 , there was $ 2.3 million of unrecognized compensation cost related to nonvested restricted stock awards expected to be recognized over a period of 2.25 years.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company measures, monitors and discloses certain of its assets and liabilities on a fair value basis. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value guidance also establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance describes three levels of inputs that may be used to measure fair value are as follows: Level 1 Quoted prices in active markets for identical assets or liabilities Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities Level 1 inputs are considered to be the most transparent and reliable and Level 3 inputs are considered to be the least transparent and reliable. The Company assumes the use of the principal market to conduct a transaction of each particular asset or liability being measured and then considers the assumptions that market participants would use when pricing the asset or liability. Whenever possible, the Company first looks for quoted prices for identical assets or liabilities in active markets (Level 1 inputs) to value each asset or liability. However, when inputs from identical assets or liabilities on active markets are not available, the Company utilizes market observable data for similar assets and liabilities. The Company maximizes the use of observable inputs and limits the use of unobservable inputs to occasions when observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity of the actual financial instrument or of the underlying collateral. Although in some instances, third party price indications may be available, limited trading activity can challenge the observability of these quotations. Assets and Liabilities Measured at Fair Value on a Recurring Basis Following is a description of the valuation methodologies and inputs used for assets and liabilities measured at fair value on a recurring basis and recognized in the accompanying consolidated balance sheets, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy. Securities Available for Sale Where quoted market prices are available in an active market, securities are classified within Level 1 of the valuation hierarchy. Level 1 securities include U.S. Treasury securities and U.S. Agency securities. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of securities with similar characteristics, or discounted cash flows and classified as Level 2 securities. Level 2 securities include agency mortgage-backed, states and political subdivisions, corporate debt, and other securities. Where Level 1 or Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy. Interest Rate Swaps and Loans Interest rate swaps are valued using the system used to value all traded securities and derivatives with swap counterparties using LIBOR rates. The fair value of loans accounted for under the fair value option represents the net carrying value of the loan, plus the equal and opposite amount of the value of the swap needed to hedge the interest rate risk and an adjustment for credit risk based on our assessment of existing market conditions for the specific portfolio of loans. This is used due to the strict prepayment penalties put in the loan terms to cover the cost of exiting the hedge of the loans in the case of early prepayment or termination. The adjustment for credit risk on loans accounted for under the fair value option is not significant to the overall fair value of the loans. The fair values estimated by swap counterparties use interest rates that are observable or that can be corroborated by observable market data and, therefore, are classified within Level 2 of the valuation hierarchy. The Company is required to post cash collateral to swap counterparties for interest rate derivative contracts that are in a liability position, thus a credit risk adjustment on interest rate swaps is not warranted. The following table presents the fair value measurements of assets and liabilities recognized in the accompanying consolidated balance sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands): Fair Value Level 1 Level 2 Level 3 As of June 30, 2015 U.S. Treasury securities $ 303,132 $ 303,132 $ — $ — U.S. Agency securities 74,375 74,375 — — Mortgage-backed securities 1,025,026 — 1,025,026 — States and political subdivision securities 1,864 — 30 1,834 Corporate debt securities 5,030 — 5,030 — Other 1,048 — 1,048 — Securities available for sale $ 1,410,475 $ 377,507 $ 1,031,134 $ 1,834 Derivatives-assets $ 1 $ — $ 1 $ — Derivatives-liabilities 24,426 — 24,426 — Fair value loans and written loan commitments 1,063,665 — 1,063,665 — Fair Value Level 1 Level 2 Level 3 As of September 30, 2014 U.S. Treasury securities $ 222,725 $ 222,725 $ — $ — U.S. Agency securities — — — — Mortgage-backed securities 1,103,415 — 1,103,415 — States and political subdivision securities 2,189 — 160 2,029 Corporate debt securities 11,873 — 11,873 — Other 1,040 — 1,040 — Securities available for sale $ 1,341,242 $ 222,725 $ 1,116,488 $ 2,029 Derivatives-assets $ 19 $ — $ 19 $ — Derivatives-liabilities 13,092 — 13,092 — Fair value loans and written loan 985,411 — 985,411 — The following table presents the changes in Level 3 financial instruments for the three months ended June 30, 2015 and 2014 (in thousands): Other Securities Available for Sale Balance as of March 31, 2015 $ 1,958 Principal paydown (124 ) Balance as of June 30, 2015 $ 1,834 Balance as of March 31, 2014 $ 2,243 Principal paydown — Balance as of June 30, 2014 $ 2,243 The following table presents the changes in Level 3 financial instruments for the nine months ended June 30, 2015 and 2014 (in thousands): Other Securities Available for Sale Balance as of September 30, 2014 $ 2,029 Principal paydown (195 ) Balance as of June 30, 2015 $ 1,834 Balance as of September 30, 2013 $ 2,243 Principal paydown — Balance as of June 30, 2014 $ 2,243 Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Following is a description of the valuation methodologies used for assets and liabilities measured at fair value on a nonrecurring basis and recognized in the accompanying consolidated balance sheets, as well as the general classification of such assets and liabilities pursuant to the valuation hierarchy. Impaired Loans (Collateral Dependent) Loans for which it is probable that the Company will not collect all principal and interest due according to contractual terms are measured for impairment. Allowable methods for estimating fair value include using the fair value of the collateral for collateral dependent loans or, where a loan is determined not to be collateral dependent, using the discounted cash flow method. If the impaired loan is identified as collateral dependent, then the fair value method of measuring the amount of the impairment is utilized. This method requires obtaining a current independent appraisal of the collateral and applying a discount factor, if necessary, to the appraised value and including costs to sell. Because many of these inputs are not observable, the measurements are classified as Level 3. Other Real Estate Owned (OREO) Other real estate owned consists of loan collateral that has been repossessed through foreclosure. This collateral is comprised of commercial and residential real estate. OREO is recorded initially at fair value of the collateral less estimated selling costs. Subsequent to foreclosure, valuations are updated periodically, and the assets may be marked down further to fair value less selling costs, reflecting a valuation allowance. Fair value measurements may be based upon appraisals, third-party price opinions, or internally developed pricing methods. These measurements are classified as Level 3. Mortgage Loans Held for Sale Fair value of mortgage loans held for sale is based on either quoted prices for the same or similar loans, or values obtained from third parties, or are estimated for portfolios of loans with similar financial characteristics and are therefore considered a Level 2 valuation. The following tables present the fair value measurement of assets and liabilities measured at fair value on a nonrecurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands): Fair Value Level 1 Level 2 Level 3 As of June 30, 2015 Other real estate owned $ 13,051 $ — $ — $ 13,051 Impaired loans 166,841 — — 166,841 Loans held for sale, at lower of cost or fair value 9,173 — 9,173 — As of September 30, 2014 Other real estate owned $ 36,879 $ — $ — $ 36,879 Impaired loans 111,265 — — 111,265 Loans held for sale, at lower of cost or fair 10,381 — 10,381 — The valuation techniques and significant unobservable inputs used to measure Level 3 fair value measurements at June 30, 2015 were as follows (in thousands): Financial Instrument Fair Value of Assets / (Liabilities) at June 30, 2015 Valuation Technique(s) Unobservable Input Range Weighted Average Other real estate owned $ 13,051 Appraisal value Property specific adjustment N/A N/A Impaired loans $ 166,841 Appraisal value Property N/A N/A Disclosures about Fair Value of Financial Instruments For financial instruments that have quoted market prices, those quotes are used to determine fair value. Financial instruments that have no defined maturity, have a remaining maturity of 180 days or less, or reprice frequently to a market rate are assumed to have a fair value that approximates carrying value, after taking into consideration any applicable credit risk. If no market quotes are available, financial instruments are valued by discounting the expected cash flows using an estimated current market interest rate for the financial instrument. The short maturity of the Company’s assets and liabilities results in having a significant number of financial instruments whose fair value equals or closely approximates carrying value. Such financial instruments are reported in the following consolidated balance sheet categories: cash and due from banks, securities sold under agreements to repurchase, and accrued interest. Fair value estimates are based on existing on and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Significant assets and liabilities that are not considered financial instruments include premises and equipment, deferred income taxes, goodwill, and core deposit and other intangibles. In addition, the tax ramifications related to the realization of unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates. Off-balance sheet instruments (commitments to extend credit and standby letters of credit) are generally short-term and at variable rates. Therefore, both the carrying amount and the estimated fair value associated with these instruments are immaterial. Fair values for balance sheet instruments as of June 30, 2015 and September 30, 2014 , are as follows (in thousands): June 30, 2015 September 30, 2014 Level in Fair Value Hierarchy Carrying Fair Value Carrying Fair Value Assets Cash and due from banks Level 1 $ 187,171 $ 187,171 $ 256,639 $ 256,639 Loans, net excluding fair valued loans and loans held for sale Level 3 6,116,471 6,099,234 5,744,157 5,734,274 Accrued interest receivable Level 2 39,528 39,528 42,609 42,609 Federal Home Loan Bank stock Level 2 36,287 36,287 35,922 35,922 Liabilities Deposits Level 3 $ 7,357,688 $ 7,384,060 $ 7,052,180 $ 7,057,591 FHLB advances, related party notes payable, and other borrowings Level 2 631,815 624,431 616,389 604,615 Securities sold under repurchase agreements Level 2 161,559 161,559 161,687 161,687 Accrued interest payable Level 2 4,211 4,211 5,273 5,273 Subordinated debentures Level 2 56,083 56,071 56,083 56,084 The following methods and assumptions were used in estimating the fair value of financial instruments that were not previously disclosed: Cash and cash due from banks: Due to the short term nature of cash and cash equivalents, the estimated fair value is equal to the carrying value and they are categorized as a Level 1 fair value measurement. Loans, net excluding fair valued loans and loans held for sale: The fair value of the loan portfolio is estimated using observable inputs including estimated cash flows, and discount rates based on interest rates currently being offered for loans with similar terms, to borrowers of similar credit quality. Loans held for investment are categorized as a Level 3 fair value measurement. Accrued interest receivable: Due to the nature of accrued interest receivable, the estimated fair value is equal to the carrying value and they are categorized as a Level 2 fair value measurement. Federal Home Loan Bank stock: The carrying amount of FHLB stock approximates its fair value as it can only be redeemed with the FHLB at par value. Federal Home Loan Bank stock has been categorized as a Level 2 fair value measurement. Deposits: The estimated fair value of deposits with no stated maturity, such as non-interest bearing demand deposits, savings, NOW, and money market accounts, is equal to the amount payable on demand. The fair value of interest-bearing time deposits is based on the discounted value of contractual cash flows of such deposits, taking into account the option for early withdrawal. The discount rate is estimated using the rates offered by the Company, at the respective measurement dates, for deposits of similar maturities. Deposits have been categorized as a Level 3 fair value measurement. FHLB advances, related party notes payable, and other borrowings: The fair value of FHLB advances, related party notes payable, and other borrowings is estimated using discounted cash flow analysis, based on current incremental borrowing rates for similar types of borrowing arrangements. In the absence of a reasonably precise methodology to determine the fair value of the credit agreement, carrying value has been used to represent fair value. FHLB advances, related party notes payable, and other borrowings have been categorized as a Level 2 fair value measurement. Securities sold under repurchase agreements: The Company’s repurchase agreements are overnight transactions that mature the day after the transaction, and as a result of this short-term nature, the estimated fair value equals the carrying value. Securities sold under repurchase agreements have been categorized as a Level 2 fair value measurement. Accrued interest payable: Due to the nature of accrued interest payable, the estimated fair value is equal to the carrying value and they are categorized as a Level 2 fair value measurement. Subordinated Debentures: The fair value of subordinated debentures is estimated using discounted cash flow analysis, based on current incremental debt rates. Subordinated debentures have been categorized as a Level 2 fair value measurement.

Earnings per Share

Earnings per Share	9 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share Basic earnings per common share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period, excluding outstanding non-vested restricted stock awards. Diluted earnings per common share is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding determined for the basic earnings per share calculation plus the dilutive effect of stock compensation using the treasury stock method. The following information was used in the computation of basic earnings per share (EPS) for the three and nine months ended June 30, 2015 and 2014 (in thousands except share data). Three Months Ended Nine Months Ended 2015 2014 2015 2014 Net income $ 28,832 $ 22,502 $ 75,253 $ 77,077 Weighted average common shares outstanding 57,898,335 57,886,114 57,897,484 57,886,114 Dilutive effect of stock based compensation 60,867 — 31,704 — Weighted average common shares outstanding for diluted earnings per share calculation 57,959,202 57,886,114 57,929,188 57,886,114 Basic earnings per share $ 0.50 $ 0.39 $ 1.30 $ 1.33 Diluted earnings per share $ 0.50 $ 0.39 $ 1.30 $ 1.33 The Company had 60,543 and 0 shares of unvested performance stock as of June 30, 2015 and 2014 , respectively, that were not included in the computation of diluted earnings per common share because performance conditions for vesting had not been met. The Company had 1,244 and 0 shares of anti-dilutive stock awards outstanding as of June 30, 2015 and 2014 , respectively.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Error Corrections and Prior Period Adjustments	The following table reflects the impact of the matter described above on previously filed financial statements: Previously Reported Currently Reported Interest Income Noninterest Income Nine months ended June 30, 2014 Realized (loss) on derivatives $ (13,277 ) $ (13,277 ) Nine months ended June 30, 2013 Realized (loss) on derivatives $ (10,207 ) $ (10,207 ) Twelve months ended September 30, 2014 Realized (loss) on derivatives $ (18,255 ) $ (18,255 ) Twelve months ended September 30, 2013 Realized (loss) on derivatives $ (14,217 ) $ (14,217 ) Twelve months ended September 30, 2012 Realized (loss) on derivatives $ (9,931 ) $ (9,931 ) The following table reflects the impact of the matter described above on previously filed financial statements: Previously Reported Currently Reported Interest Income Noninterest Expense Noninterest Income Nine months ended June 30, 2014 Unrealized loss on derivatives $ — $ 12,119 $ — $ 12,119 Loan fair value change related to interest rates (12,119 ) — (12,119 ) — Loan fair value change related to credit quality (1,387 ) — (1,387 ) — $ (13,506 ) $ 12,119 $ (13,506 ) $ 12,119 Nine months ended June 30, 2013 Unrealized (gain) on derivatives $ — $ (41,635 ) $ — $ (41,635 ) Loan fair value change related to interest rates 41,635 — 41,635 — Loan fair value change related to credit quality 141 — 141 — $ 41,776 $ (41,635 ) $ 41,776 $ (41,635 ) Twelve months ended September 30, 2014 Unrealized loss on derivatives $ — $ 11,922 $ — $ 11,922 Loan fair value change related to interest rates (11,922 ) — (11,922 ) — Loan fair value change related to credit quality 18 — 18 — $ (11,904 ) $ 11,922 $ (11,904 ) $ 11,922 Twelve months ended September 30, 2013 Unrealized (gain) on derivatives $ — $ (40,305 ) $ — $ (40,305 ) Loan fair value change related to interest rates 40,305 — 40,305 — Loan fair value change related to credit quality 855 — 855 — $ 41,160 $ (40,305 ) $ 41,160 $ (40,305 ) Twelve months ended September 30, 2012 Unrealized loss on derivatives $ — $ 19,369 $ — $ 19,369 Loan fair value change related to interest rates (19,369 ) — (19,369 ) — Loan fair value change related to credit quality 4,276 — 4,276 — $ (15,093 ) $ 19,369 $ (15,093 ) $ 19,369

Securities Available for Sale (

Securities Available for Sale (Tables)	9 Months Ended
	Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Fair Value	The amortized cost and approximate fair value of investments in securities, all of which are classified as available for sale according to management’s intent, are summarized as follows (in thousands): Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value As of June 30, 2015 U.S. Treasury securities $ 300,501 $ 2,744 $ (113 ) $ 303,132 U.S. Agency securities 74,379 53 (57 ) 74,375 Mortgage-backed securities: Government National Mortgage Association 905,660 2,952 (7,055 ) 901,557 Federal National Mortgage Association 47,727 — (377 ) 47,350 Small Business Assistance Program 77,122 — (1,003 ) 76,119 States and political subdivision securities 1,864 — — 1,864 Corporate debt securities 4,996 34 — 5,030 Other 1,006 42 — 1,048 $ 1,413,255 $ 5,825 $ (8,605 ) $ 1,410,475 Amortized Cost Gross Gross Fair Value As of September 30, 2014 U.S. Treasury securities $ 222,868 $ 31 $ (174 ) $ 222,725 U.S. Agency securities — — — — Mortgage-backed securities: Government National Mortgage Association 1,113,363 4,639 (14,587 ) 1,103,415 Federal National Mortgage Association — — — — Small Business Assistance Program — — — — States and political subdivision securities 2,188 1 — 2,189 Corporate debt securities 11,732 141 — 11,873 Other 1,006 34 — 1,040 $ 1,351,157 $ 4,846 $ (14,761 ) $ 1,341,242
Marketable Securities	The amortized cost and approximate fair value of debt securities available for sale as of June 30, 2015 and September 30, 2014 , by contractual maturity, are shown below. Maturities of mortgage-backed securities may differ from contractual maturities because the mortgages underlying the securities may be called or repaid without any penalties. June 30, 2015 September 30, 2014 (In Thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 75,053 $ 75,050 $ 7,207 $ 7,218 Due after one year through five years 305,648 308,312 223,282 223,140 Due after five years through ten years 1,039 1,039 6,299 6,429 381,740 384,401 236,788 236,787 Mortgage-backed securities 1,030,509 1,025,026 1,113,363 1,103,415 Securities without contractual maturities 1,006 1,048 1,006 1,040 $ 1,413,255 $ 1,410,475 $ 1,351,157 $ 1,341,242
Schedule of Unrealized Loss on Investments	The following table presents the Company’s gross unrealized losses and approximate fair value in investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands): Less than 12 months June 30, 2015 Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 18,364 $ (113 ) $ — $ — $ 18,364 $ (113 ) U. S. Agency securities 49,577 (57 ) — — 49,577 (57 ) Mortgage-backed securities 161,004 (1,607 ) 507,944 (6,828 ) 668,948 (8,435 ) $ 228,945 $ (1,777 ) $ 507,944 $ (6,828 ) $ 736,889 $ (8,605 ) Less than 12 months September 30, 2014 Total Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 98,344 $ (174 ) $ — $ — $ 98,344 $ (174 ) U.S. Agency securities — — — — — — Mortgage-backed securities 24,625 (125 ) 730,171 (14,462 ) 754,796 (14,587 ) $ 122,969 $ (299 ) $ 730,171 $ (14,462 ) $ 853,140 $ (14,761 )
Unrealized Gain (Loss) on Investments	The components of other comprehensive income from net unrealized gains (losses) on securities available for sale for the three and nine months ended June 30, 2015 and 2014 , respectively are as follows (in thousands): Three Months Ended Nine Months Ended June 30, 2015 2014 2015 2014 Beginning balance accumulated other comprehensive income (loss) $ 2,111 $ (7,214 ) $ (6,157 ) $ (7,081 ) Net unrealized holding gain (loss) arising during the period (6,099 ) 7,752 7,186 7,363 Reclassification adjustment for net gain realized in net income — — (51 ) (6 ) Net change in unrealized gain (loss) before income taxes (6,099 ) 7,752 7,135 7,357 Income tax (expense) benefit 2,254 (2,946 ) (2,712 ) (2,684 ) Net change in unrealized gain (loss) on securities after taxes (3,845 ) 4,806 4,423 4,673 Ending balance accumulated other comprehensive income (loss) $ (1,734 ) $ (2,408 ) $ (1,734 ) $ (2,408 )

Loans (Tables)

Loans (Tables)	9 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Schedule of Loans Receivable	The composition of net loans as of June 30, 2015 and September 30, 2014 , is as follows (in thousands): June 30, 2015 September 30, 2014 Residential real estate $ 922,481 $ 901,605 Commercial real estate 2,720,993 2,541,194 Commercial non real estate 1,701,024 1,571,640 Agriculture 1,813,330 1,681,209 Consumer 75,311 90,086 Other 38,901 34,243 7,272,040 6,819,977 Less: Allowance for loan losses (55,930 ) (47,518 ) Unamortized discount on acquired loans (20,356 ) (25,638 ) Unearned net deferred fees and costs and loans in process (6,445 ) (6,872 ) $ 7,189,309 $ 6,739,949
Schedule of Company's Nonaccrual Loans	The following table presents the Company’s nonaccrual loans at June 30, 2015 and September 30, 2014 (in thousands), excluding loans covered under the FDIC loss-sharing agreements. Loans greater than 90 days past due and still accruing interest as of June 30, 2015 and September 30, 2014 , were not significant. Nonaccrual loans June 30, 2015 September 30, 2014 Residential real estate $ 7,846 $ 6,671 Commercial real estate 22,000 20,767 Commercial non real estate 8,198 4,908 Agriculture 21,709 11,453 Consumer 90 146 Total $ 59,843 $ 43,945
Past Due Financing Receivables	The following table (in thousands) presents the Company’s past due loans at June 30, 2015 and September 30, 2014 . This table is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014 . As of June 30, 2015 30-59 Days Past Due 60-89 Days Past Due Greater Than 90 Days Total Past Due Current Total Financing Receivables Residential real estate $ 734 $ 644 $ 3,484 $ 4,862 $ 806,716 $ 811,578 Commercial real estate 5,194 1,313 4,327 10,834 2,402,342 2,413,176 Commercial non real estate 1,867 121 5,213 7,201 1,257,382 1,264,583 Agriculture 1,650 221 7,470 9,341 1,472,970 1,482,311 Consumer 128 196 37 361 74,903 75,264 Other — — — — 38,901 38,901 9,573 2,495 20,531 32,599 6,053,214 6,085,813 Loans covered by FDIC loss sharing agreements 1,267 371 1,012 2,650 99,553 102,203 Total $ 10,840 $ 2,866 $ 21,543 $ 35,249 $ 6,152,767 $ 6,188,016 As of September 30, 2014 30-59 Days 60-89 Days 90 Days or Greater Past Due Total Current Total Residential real estate $ 675 $ 611 $ 2,581 $ 3,867 $ 760,887 $ 764,754 Commercial real estate 11,050 819 3,384 15,253 1,988,585 2,003,838 Commercial non real estate 1,761 6,228 744 8,733 1,303,925 1,312,658 Agriculture 16 368 4,205 4,589 1,364,960 1,369,549 Consumer 244 18 49 311 89,528 89,839 Other — — — — 34,243 34,243 13,746 8,044 10,963 32,753 5,542,128 5,574,881 Loans covered by FDIC loss sharing agreements 1,960 1,252 3,728 6,940 227,096 234,036 Total $ 15,706 $ 9,296 $ 14,691 $ 39,693 $ 5,769,224 $ 5,808,917
Composition of Loan Portfolio by Internal Risk Rating	The composition of the loan portfolio by internally assigned grade is as follows as of June 30, 2015 and September 30, 2014 . This table (in thousands) is presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million for June 30, 2015 and $985.4 million for September 30, 2014 : As of June 30, 2015 Residential Real Estate Commercial Real Estate Commercial Non Real Estate Agriculture Consumer Other Total Credit Risk Profile by Internally Assigned Grade Grade: Pass $ 794,153 $ 2,260,026 $ 1,147,017 $ 1,262,624 $ 74,951 $ 38,901 $ 5,577,672 Watchlist 5,142 98,836 51,606 166,583 89 — 322,256 Substandard 11,895 54,109 64,768 51,761 223 — 182,756 Doubtful 384 205 1,192 1,112 1 — 2,894 Loss 4 — — 231 — — 235 Ending balance 811,578 2,413,176 1,264,583 1,482,311 75,264 38,901 6,085,813 Loans covered by FDIC loss sharing agreements 102,203 — — — — — 102,203 Total $ 913,781 $ 2,413,176 $ 1,264,583 $ 1,482,311 $ 75,264 $ 38,901 $ 6,188,016 As of September 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Credit Risk Profile by Internally Assigned Grade Grade: Pass $ 747,485 $ 1,867,866 $ 1,218,558 $ 1,202,145 $ 89,197 $ 34,243 $ 5,159,494 Watchlist 5,320 84,132 65,628 132,262 381 — 287,723 Substandard 11,290 51,692 27,499 35,107 242 — 125,830 Doubtful 659 148 798 35 19 — 1,659 Loss — — 175 — — — 175 Ending balance 764,754 2,003,838 1,312,658 1,369,549 89,839 34,243 5,574,881 Loans covered by FDIC loss sharing agreements 127,115 95,467 9,390 2,004 60 — 234,036 Total $ 891,869 $ 2,099,305 $ 1,322,048 $ 1,371,553 $ 89,899 $ 34,243 $ 5,808,917
Impaired Financing Receivables	The following table presents the Company’s impaired loans (in thousands). This table excludes loans covered by FDIC loss sharing agreements: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment As of June 30, 2015 Impaired loans: With an allowance recorded: Residential real estate $ 12,481 $ 12,678 $ 2,582 $ 12,294 Commercial real estate 77,015 78,947 3,006 69,585 Commercial non real estate 68,694 78,557 6,733 50,608 Agriculture 53,104 53,541 3,743 44,316 Consumer 224 312 45 252 $ 211,518 $ 224,035 $ 16,109 $ 177,055 Recorded Unpaid Related Average As of September 30, 2014 Impaired loans: With an allowance recorded: Residential real estate $ 12,107 $ 12,737 $ 2,529 $ 13,572 Commercial real estate 62,155 64,597 2,017 84,490 Commercial non real estate 35,522 37,882 3,927 31,827 Agriculture 35,528 37,958 1,155 30,546 Consumer 280 491 51 346 $ 145,592 $ 153,665 $ 9,679 $ 160,781 The following table provides purchased impaired loans at June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Outstanding Balance 1 Recorded Investment 2 Carrying Value 3 Outstanding 1 Recorded 2 Carrying 3 Residential real estate $ 98,677 $ 86,569 $ 85,059 $ 115,863 $ 102,987 $ 100,203 Commercial real estate 100,075 23,402 22,147 130,825 49,202 48,557 Commercial non real estate 11,092 2,889 2,889 16,697 6,361 6,361 Agriculture 1,567 1,567 1,567 1,747 1,746 1,746 Consumer 1,474 1,374 1,374 2,019 1,843 1,818 Total lending $ 212,885 $ 115,801 $ 113,036 $ 267,151 $ 162,139 $ 158,685 1 Represents the legal balance of loans acquired with deteriorated credit quality. 2 Represents the book balance of loans acquired with deteriorated credit quality. 3 Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.
Troubled Debt Restructurings on Financing Receivables	The following table presents the recorded value of the Company’s TDR balances as of June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Accruing Nonaccrual Accruing Nonaccrual Residential real estate $ 668 $ 1,536 $ 1,112 $ 1,730 Commercial real estate 44,170 4,680 25,177 6,884 Commercial non real estate 9,961 1,101 6,753 1,785 Agriculture 80 7,440 3,780 9,994 Consumer 37 7 35 22 Total $ 54,916 $ 14,764 $ 36,857 $ 20,415 The following table presents a summary of all accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014 , respectively: Three Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Modification Post- Modification Number Pre- Modification Post- Modification Residential real estate Rate modification — $ — $ — — $ — $ — Term extension 1 35 35 — — — Payment modification — — — 1 35 35 Bankruptcy — — — — — — Other — — — — — — Total residential real estate 1 35 35 1 35 35 Commercial real estate Rate modification — — — — — — Term extension 1 574 574 — — — Payment modification — — — 1 1,841 1,841 Bankruptcy — — — — — — Other — — — — — — Total commercial real estate 1 574 574 1 1,841 1,841 Commercial non real estate Rate modification — — — — — — Term extension — — — 1 79 79 Payment modification — — — 1 2,182 2,182 Bankruptcy — — — — — — Other — — — 1 2 2 Total commercial non real estate — — — 3 2,263 2,263 Agriculture Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — — — — Consumer Rate modification — — — — — — Term extension — — — — — — Payment modification 1 18 18 1 11 11 Bankruptcy — — — — — — Other — — — — — — Total consumer 1 18 18 1 11 11 Total accruing 3 $ 627 $ 627 6 $ 4,150 $ 4,150 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification — $ — $ — — $ — $ — The following table presents a summary of all accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014 : Nine Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Post- Number Pre- Post- Residential real estate Rate modification 1 $ 15 $ 15 — $ — $ — Term extension 1 35 35 2 74 74 Payment modification — — — 2 50 50 Bankruptcy — — — 1 130 130 Other 1 21 21 — — — Total residential real estate 3 71 71 5 254 254 Commercial real estate Rate modification — — — — — — Term extension 2 664 574 — — — Payment modification 6 22,542 22,542 2 2,911 2,911 Bankruptcy 1 498 498 — — — Other — — — — — — Total commercial real estate 9 23,704 23,614 2 2,911 2,911 Commercial non real estate Rate modification 1 32 32 — — — Term extension 3 2,879 2,879 5 1,813 1,813 Payment modification 2 1,874 1,874 5 2,917 2,917 Bankruptcy — — — — — — Other — — — 2 329 329 Total commercial non real estate 6 4,785 4,785 12 5,059 5,059 Agriculture Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — — — — Consumer Rate modification — — — — — — Term extension — — — — — — Payment modification 1 18 18 3 15 15 Bankruptcy 1 6 6 — — — Other — — — 2 28 28 Total consumer 2 24 24 5 43 43 Total accruing 20 $ 28,584 $ 28,494 24 $ 8,267 $ 8,267 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification 1 $ 90 $ — — $ — $ — The following table presents a summary of all non-accruing loans restructured in TDRs during the three months ended June 30, 2015 and 2014 : Three Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Modification Post- Modification Number Pre- Modification Post- Modification Residential real estate Rate modification — $ — $ — — $ — $ — Term extension 1 — — 1 8 8 Payment modification 1 19 19 1 11 11 Bankruptcy — — — — — — Other 1 25 10 — — — Total residential real estate 3 44 29 2 19 19 Commercial real estate Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total commercial real estate — — — — — — Commercial Non Real Estate Rate modification — — — — — — Term extension 1 77 — — — — Payment modification 1 4 4 1 36 36 Bankruptcy — — — — — — Other — — — — — — Total commercial non real estate 2 81 4 1 36 36 Agriculture Rate modification — — — — — — Term extension — — — — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — — — — Consumer Rate modification — — — — — — Term extension 1 1 1 — — — Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total consumer 1 1 1 — — — Total non-accruing 6 $ 126 $ 34 3 $ 55 $ 55 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification 2 $ 92 $ — — $ — $ — The following table presents a summary of all non-accruing loans restructured in TDRs during the nine months ended June 30, 2015 and 2014 : Nine Months Ended June 30, 2015 2014 Recorded Investment Recorded Investment ($ in thousands) Number Pre- Post- Number Pre- Post- Residential real estate Rate modification 2 $ 104 $ 104 4 $ 98 $ 98 Term extension 2 77 77 3 26 26 Payment modification 1 19 19 1 11 11 Bankruptcy 1 43 43 1 4 4 Other 1 25 10 1 38 38 Total residential real estate 7 268 253 10 177 177 Commercial real estate Rate modification — — — 2 500 500 Term extension — — — 2 4,031 4,031 Payment modification — — — — — — Bankruptcy — — — — — — Other — — — 1 87 87 Total commercial real estate — — — 5 4,618 4,618 Commercial Non Real Estate Rate modification — — — — — — Term extension 5 294 217 8 125 125 Payment modification 1 4 4 1 36 36 Bankruptcy — — — 1 10 10 Other — — — — — — Total commercial non real estate 6 298 221 10 171 171 Agriculture Rate modification — — — — — — Term extension — — — 2 260 260 Payment modification — — — — — — Bankruptcy — — — — — — Other — — — — — — Total agriculture — — — 2 260 260 Consumer Rate modification — — — — — — Term extension 2 2 2 1 11 11 Payment modification — — — — — — Bankruptcy — — — — — — Other — — — 1 1 1 Total consumer 2 2 2 2 12 12 Total non-accruing 15 $ 568 $ 476 29 $ 5,238 $ 5,238 Change in recorded investment due to principal paydown at time of modification — $ — $ — — $ — $ — Change in recorded investment due to chargeoffs at time of modification 2 $ 92 $ — — $ — $ — The tables below represent defaults on loans that were first modified during the respective past 12 months, that became 90 days or more delinquent or were charged-off during the three and nine months ended June 30, 2015 and 2014 , respectively. Three Months Ended 2015 2014 ($ in thousands) Number of Loans Recorded Investment Number of Loans Recorded Investment Residential real estate 1 $ 10 — $ — Commercial real estate — — — — Commercial non real estate 2 32 1 15 Agriculture 3 782 — — Consumer — — — — 6 $ 824 1 $ 15 Nine Months Ended 2015 2014 ($ in thousands) Number of Recorded Number of Recorded Residential real estate 4 $ 353 2 $ 337 Commercial real estate — — 2 7,053 Commercial non real estate 4 32 4 537 Agriculture 3 782 7 7,361 Consumer — — — — 11 $ 1,167 15 $ 15,288

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Allowance for credit losses on financing receivables	The following tables presents the Company’s allowance for loan losses roll forward for the three and nine month periods ended June 30, 2015 and 2014 . Three Months Ended June 30, 2015 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance April 1, $ 7,495 $ 15,736 $ 15,957 $ 12,222 $ 189 $ 827 $ 52,426 Charge-offs (77 ) (280 ) (1,337 ) (411 ) (31 ) (356 ) (2,492 ) Recoveries 84 205 949 10 32 306 1,586 Provision (325 ) 2,130 1,381 1,545 164 96 4,991 (Impairment) improvement of (625 ) 45 — — (1 ) — (581 ) Ending balance June 30, 2015 $ 6,552 $ 17,836 $ 16,950 $ 13,366 $ 353 $ 873 $ 55,930 Three Months Ended June 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance April 1, 2014 $ 10,277 $ 17,603 $ 10,275 $ 7,903 $ 430 $ 665 $ 47,153 Charge-offs (144 ) (539 ) (1,884 ) (566 ) (39 ) (198 ) (3,370 ) Recoveries 94 497 469 14 69 612 1,755 Provision 187 494 727 389 (68 ) (229 ) 1,500 (Impairment) improvement of — — — — — — — Ending balance June 30, 2014 $ 10,414 $ 18,055 $ 9,587 $ 7,740 $ 392 $ 850 $ 47,038 Nine Months Ended June 30, 2015 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance October 1, $ 8,342 $ 16,884 $ 10,550 $ 10,655 $ 264 $ 823 $ 47,518 Charge-offs (197 ) (1,932 ) (9,861 ) (438 ) (88 ) (1,187 ) (13,703 ) Recoveries 197 300 3,092 89 79 950 4,707 Provision (515 ) 2,476 13,169 3,060 123 287 18,600 (Impairment) improvement of (1,275 ) 108 — — (25 ) — (1,192 ) Ending balance June 30, 2015 $ 6,552 $ 17,836 $ 16,950 $ 13,366 $ 353 $ 873 $ 55,930 Nine Months Ended June 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Beginning balance October 1, $ 11,779 $ 22,562 $ 11,222 $ 9,296 $ 312 $ 693 $ 55,864 Charge-offs (581 ) (3,733 ) (2,883 ) (2,652 ) (191 ) (1,154 ) (11,194 ) Recoveries 190 1,521 1,228 29 136 1,329 4,433 Provision 201 (2,903 ) 1,461 1,067 67 (18 ) (125 ) (Impairment) improvement of (1,175 ) 608 (1,441 ) — 68 — (1,940 ) Ending balance June 30, 2014 $ 10,414 $ 18,055 $ 9,587 $ 7,740 $ 392 $ 850 $ 47,038 The following tables provide details regarding the allowance for loan and lease losses and balance by type of allowance. These tables (in thousands) are presented net of unamortized discount on acquired loans and excludes loans measured at fair value with changes in fair value reported in earnings of $1,063.7 million , loans held for sale of $9.2 million , and guaranteed loans of $108.6 million for June 30, 2015 and loans measured at fair value with changes in fair value reported in earnings of $985.4 million , loans held for sale of $10.4 million , and guaranteed loans of $106.5 million for September 30, 2014 . As of June 30, 2015 Residential Commercial Commercial Agriculture Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ 2,581 $ 2,879 $ 6,712 $ 3,743 $ 45 $ — $ 15,960 Collectively evaluated for impairment 2,461 11,952 10,238 9,623 308 873 35,455 Loans acquired with deteriorated credit quality 1,510 1,255 — — — — 2,765 Loans acquired without deteriorated credit quality — 1,750 — — — — 1,750 Total allowance $ 6,552 $ 17,836 $ 16,950 $ 13,366 $ 353 $ 873 $ 55,930 Financing Receivables Individually evaluated for impairment $ 9,125 $ 47,069 $ 67,369 $ 43,113 $ 165 $ — $ 166,841 Collectively evaluated for impairment 709,265 2,225,924 1,140,921 1,411,741 72,421 38,901 5,599,173 Loans acquired with deteriorated credit quality 86,569 23,402 2,889 1,567 1,374 — 115,801 Loans acquired without deteriorated credit quality 98,071 65,918 5,445 17,683 1,304 — 188,421 Loans Outstanding $ 903,030 $ 2,362,313 $ 1,216,624 $ 1,474,104 $ 75,264 $ 38,901 $ 6,070,236 As of September 30, 2014 Residential Commercial Commercial Agriculture Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ 2,528 $ 1,953 $ 3,909 $ 1,152 $ 51 $ — $ 9,593 Collectively evaluated for impairment 3,030 12,034 6,641 9,503 188 823 32,219 Loans acquired with deteriorated credit quality 2,784 645 — — 25 — 3,454 Loans acquired without deteriorated credit quality — 2,252 — — — — 2,252 Total allowance $ 8,342 $ 16,884 $ 10,550 $ 10,655 $ 264 $ 823 $ 47,518 Financing Receivables Individually evaluated for impairment $ 9,384 $ 38,457 $ 28,298 $ 25,655 $ 166 $ — $ 101,960 Collectively evaluated for impairment 649,970 1,874,474 1,224,035 1,319,343 85,065 34,243 5,187,130 Loans acquired with deteriorated credit quality 102,987 49,202 6,361 1,746 1,843 — 162,139 Loans acquired without deteriorated credit quality 117,630 95,323 7,409 17,655 2,825 — 240,842 Loans Outstanding $ 879,971 $ 2,057,456 $ 1,266,103 $ 1,364,399 $ 89,899 $ 34,243 $ 5,692,071

Accounting for Certain Loans 31

Accounting for Certain Loans Acquired with Deteriorated Credit Quality (Tables)	9 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Troubled Debt Restructurings on Financing Receivables	The re-assessment of purchased impaired loans resulted in the following changes in the accretable yield during the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Balance at beginning of period $ 43,431 $ 56,415 $ 50,889 $ 67,660 Accretion (3,240 ) (4,642 ) (11,249 ) (14,016 ) Reclassification from nonaccretable difference 7,736 227 8,367 3,175 Disposals (1,038 ) (185 ) (1,118 ) (5,004 ) Balance at end of period $ 46,889 $ 51,815 $ 46,889 $ 51,815
Impaired Financing Receivables	The following table presents the Company’s impaired loans (in thousands). This table excludes loans covered by FDIC loss sharing agreements: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment As of June 30, 2015 Impaired loans: With an allowance recorded: Residential real estate $ 12,481 $ 12,678 $ 2,582 $ 12,294 Commercial real estate 77,015 78,947 3,006 69,585 Commercial non real estate 68,694 78,557 6,733 50,608 Agriculture 53,104 53,541 3,743 44,316 Consumer 224 312 45 252 $ 211,518 $ 224,035 $ 16,109 $ 177,055 Recorded Unpaid Related Average As of September 30, 2014 Impaired loans: With an allowance recorded: Residential real estate $ 12,107 $ 12,737 $ 2,529 $ 13,572 Commercial real estate 62,155 64,597 2,017 84,490 Commercial non real estate 35,522 37,882 3,927 31,827 Agriculture 35,528 37,958 1,155 30,546 Consumer 280 491 51 346 $ 145,592 $ 153,665 $ 9,679 $ 160,781 The following table provides purchased impaired loans at June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Outstanding Balance 1 Recorded Investment 2 Carrying Value 3 Outstanding 1 Recorded 2 Carrying 3 Residential real estate $ 98,677 $ 86,569 $ 85,059 $ 115,863 $ 102,987 $ 100,203 Commercial real estate 100,075 23,402 22,147 130,825 49,202 48,557 Commercial non real estate 11,092 2,889 2,889 16,697 6,361 6,361 Agriculture 1,567 1,567 1,567 1,747 1,746 1,746 Consumer 1,474 1,374 1,374 2,019 1,843 1,818 Total lending $ 212,885 $ 115,801 $ 113,036 $ 267,151 $ 162,139 $ 158,685 1 Represents the legal balance of loans acquired with deteriorated credit quality. 2 Represents the book balance of loans acquired with deteriorated credit quality. 3 Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.

FDIC Indemnification Asset (Tab

FDIC Indemnification Asset (Tables)	9 Months Ended
	Jun. 30, 2015
Banking and Thrift [Abstract]
FDIC indemnification asset roll forward	The following table represents a summary of the activity related to the FDIC indemnification asset for the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Balance at beginning of period $ 19,895 $ 37,775 $ 26,678 $ 45,690 Amortization (1,754 ) (3,256 ) (6,347 ) (11,203 ) Changes in expected reimbursements from FDIC for changes in expected credit losses 15 958 (175 ) 550 Changes in reimbursable expenses (1,148 ) (280 ) (1,511 ) 2,525 Payments to/(from) the FDIC (29 ) (2,965 ) (1,666 ) (5,330 ) Balance at end of period $ 16,979 $ 32,232 $ 16,979 $ 32,232

Derivative Financial Instrume33

Derivative Financial Instruments (Tables)	9 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Positions, Notional Amounts	The following table summarizes the notional amounts and estimated fair values of the Company’s derivative instruments at June 30, 2015 and September 30, 2014 (in thousands). June 30, 2015 Notional Balance Sheet Positive Fair Negative Fair Derivatives not designated as hedging instruments: Interest rate swaps $ 1,065,703 Liabilities $ 2,867 $ (27,292 ) Mortgage loan commitments 33,626 Assets 1 — Mortgage loan forward sale contracts 38,882 Liabilities — (1 ) September 30, 2014 Notional Balance Sheet Positive Fair Negative Fair Derivatives not designated as hedging instruments: Interest rate swaps $ 986,440 Liabilities $ 6,213 $ (19,286 ) Mortgage loan commitments 22,563 Assets 19 — Mortgage loan forward sale contracts 28,459 Liabilities — (19 )
Schedule of Derivative Instruments, Effect on Other Comprehensive Income	The effect of derivatives on the consolidated statements of comprehensive income for the three and nine months ended June 30, 2015 and 2014 (in thousands) was as follows: Amount of Gain (Loss) Recognized in Income Three Months Ended Nine Months Ended Location of 2015 2014 2015 2014 Derivatives not designated as hedging instruments: Interest rate swaps Noninterest income $ 18,946 $ (17,797 ) $ (27,357 ) $ (25,396 ) Mortgage loan commitments Noninterest income (26 ) 6 1 40 Mortgage loan forward sale contracts Noninterest income 26 (6 ) (1 ) (40 )
Summary of Offsetting Assets	The following tables (in thousands) present the Company's gross derivative financial assets and liabilities at June 30, 2015 and September 30, 2014 , and the related impact of enforceable master netting arrangements and cash collateral, where applicable: Gross Amount Amount Offset Net Amount Presented in Consolidated Balance Sheets Held/Pledged Financial Instruments 1 Net Amount June 30, 2015 Derivative financial assets: Derivatives subject to master netting arrangement or similar arrangement $ 2,867 $ (2,867 ) $ — $ — $ — Derivative financial liabilities: Derivatives subject to master netting arrangement or similar arrangement (27,292 ) 2,867 (24,425 ) 24,425 — Total derivative financial liabilities $ (24,425 ) $ — $ (24,425 ) $ 24,425 $ — 1 The actual amount of collateral exceeds the fair value exposure, at the individual counterparty level, as of the date presented. Gross Amount Net Amount Held/Pledged Net September 30, 2014 Derivative financial assets: Derivatives subject to master netting arrangement or similar arrangement $ 6,213 $ (6,213 ) $ — $ — $ — Derivative financial liabilities: Derivatives subject to master netting arrangement or similar arrangement (19,286 ) 6,213 (13,073 ) 13,073 — Total derivative financial liabilities $ (13,073 ) $ — $ (13,073 ) $ 13,073 $ —
Summary of Offsetting Liabilities	The following tables (in thousands) present the Company's gross derivative financial assets and liabilities at June 30, 2015 and September 30, 2014 , and the related impact of enforceable master netting arrangements and cash collateral, where applicable: Gross Amount Amount Offset Net Amount Presented in Consolidated Balance Sheets Held/Pledged Financial Instruments 1 Net Amount June 30, 2015 Derivative financial assets: Derivatives subject to master netting arrangement or similar arrangement $ 2,867 $ (2,867 ) $ — $ — $ — Derivative financial liabilities: Derivatives subject to master netting arrangement or similar arrangement (27,292 ) 2,867 (24,425 ) 24,425 — Total derivative financial liabilities $ (24,425 ) $ — $ (24,425 ) $ 24,425 $ — 1 The actual amount of collateral exceeds the fair value exposure, at the individual counterparty level, as of the date presented. Gross Amount Net Amount Held/Pledged Net September 30, 2014 Derivative financial assets: Derivatives subject to master netting arrangement or similar arrangement $ 6,213 $ (6,213 ) $ — $ — $ — Derivative financial liabilities: Derivatives subject to master netting arrangement or similar arrangement (19,286 ) 6,213 (13,073 ) 13,073 — Total derivative financial liabilities $ (13,073 ) $ — $ (13,073 ) $ 13,073 $ —

The Fair Value Option (Tables)

The Fair Value Option (Tables)	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Summary of Fair Value Option	Changes in fair value for items for which the fair value option has been elected and the line items in which these changes are reported are as follows for the three and nine months ended June 30, 2015 and 2014 (in thousands): For the Three Months Ended For the Nine Months Ended June 30, 2015 June 30, 2014 June 30, 2015 June 30, 2014 Noninterest Total Changes Noninterest Total Changes Noninterest Total Changes Noninterest Total Changes Long-term loans and written loan commitments $ (24,394 ) $ (24,394 ) $ 13,886 $ 13,886 $ 7,914 $ 7,914 $ 13,506 $ 13,506

Core Deposits and Other Intan35

Core Deposits and Other Intangibles (Tables)	9 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-lived Intangible Assets	A summary of intangible assets subject to amortization is as follows (in thousands): Core Deposit Intangible Brand Intangible Customer Relationships Intangible Total As of June 30, 2015 Gross carrying amount $ 92,679 $ 8,464 $ 16,089 $ 117,232 Accumulated amortization (91,980 ) (3,995 ) (13,430 ) (109,405 ) Net intangible assets $ 699 $ 4,469 $ 2,659 $ 7,827 As of September 30, 2014 Gross carrying amount $ 92,679 $ 8,464 $ 16,089 $ 117,232 Accumulated amortization (87,423 ) (3,572 ) (12,008 ) (103,003 ) Net intangible assets $ 5,256 $ 4,892 $ 4,081 $ 14,229
Schedule of Finite-lived Intangible Assets, Future Amortization Expense	Estimated amortization expense of intangible assets in subsequent fiscal years is as follows (in thousands): Remaining in 2015 $ 709 2016 2,822 2017 1,097 2018 564 2019 564 2020 and thereafter 2,071 $ 7,827

Securities Sold Under Agreeme36

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Jun. 30, 2015
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]
Schedule of Repurchase Agreements	The following tables present the gross obligation by the class of collateral pledged and the remaining contractual maturity of the agreements at June 30, 2015 and September 30, 2014 (in thousands). June 30, 2015 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Repurchase agreements US Treasury and agency $ 52,402 $ — $ — $ — $ 52,402 Mortgage-backed securities 106,209 — — 2,948 109,157 Total repurchase agreements $ 158,611 $ — $ — $ 2,948 $ 161,559 September 30, 2014 Remaining Contractual Maturity of the Agreements Overnight and Continuous Up to 30 Days 30-90 Days Greater than 90 Days Total Repurchase agreements US Treasury and agency $ 8,469 $ — $ — $ — $ 8,469 Mortgage-backed securities 149,511 — — 3,707 153,218 Total repurchase agreements $ 157,980 $ — $ — $ 3,707 $ 161,687

FHLB Advances, Related Party 37

FHLB Advances, Related Party Notes Payable and Other Borrowings (Tables)	9 Months Ended
	Jun. 30, 2015
Federal Home Loan Banks [Abstract]
Schedule of FHLB Advances and Other Borrowings	FHLB advances, related party notes payable, and other borrowings consist of the following at June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Subordinated capital note to NAB New York (a branch of NAB), due June 2018, interest paid quarterly based on LIBOR plus 205 basis points, unsecured $ 35,795 $ 35,795 $10,000 revolving line of credit to NAB due on demand, interest paid monthly based on LIBOR plus 125 basis points, unsecured 5,500 5,500 Total related party notes payable 41,295 41,295 Notes payable to Federal Home Loan Bank (FHLB), interest rates from 0.21% to 3.66% and maturity dates from February 2016 to July 2023, collateralized by real estate loans and FHLB stock, with various call dates at the option of the FHLB 590,000 575,000 Other 520 94 Total FHLB advances and other borrowings 590,520 575,094 Total borrowings $ 631,815 $ 616,389
Schedule of FHLB Advances and Other Borrowings by Maturity Date	As of June 30, 2015 , FHLB advances, related party notes payable and other borrowings are due or callable (whichever is earlier) in subsequent fiscal years as follows (in thousands): Remaining in 2015 $ 6,020 2016 90,000 2017 25,000 2018 60,795 2019 50,000 2020 and thereafter 400,000 $ 631,815

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense (Benefit) Components	The provision for income taxes charged to operations consists of the following for the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Currently paid or payable Federal $ 5,600 $ 16,800 $ 29,611 $ 43,760 State 2,098 2,588 5,575 6,545 7,698 19,388 35,186 50,305 Deferred tax (benefit) expense 7,173 (7,254 ) 3,107 (8,743 ) Income tax expense $ 14,871 $ 12,134 $ 38,293 $ 41,562
Schedule of Effective Income Tax Rate Reconciliation	The income tax provision differs from the amount of income tax determined by applying the U.S. federal income tax rate to pretax income due to the following for the three and nine months ended June 30, 2015 and 2014 (in thousands): Three Months Ended Nine Months Ended 2015 2014 2015 2014 Computed “expected” tax expense (35%) $ 15,296 $ 12,122 $ 39,741 $ 41,523 Increase (decrease) in income taxes resulting from: Tax exempt interest income (1,573 ) (1,263 ) (4,789 ) (3,539 ) State income taxes, net of federal benefit 1,363 1,682 3,623 4,254 Other (215 ) (407 ) (282 ) (676 ) Actual tax expense $ 14,871 $ 12,134 $ 38,293 $ 41,562
Schedule of Deferred Tax Assets and Liabilities	Net deferred tax assets (liabilities) consist of the following components at June 30, 2015 and September 30, 2014 (in thousands): June 30, 2015 September 30, 2014 Deferred tax assets: Allowance for loan losses $ 22,796 $ 19,683 Compensation 705 329 Net operating loss carryforward 81 119 Securities available for sale 1,046 3,758 Other real estate owned 8,880 13,721 Core deposit intangible and other fair value adjustments 11,351 10,573 Excess tax basis of loans acquired over carrying value 4,630 9,595 Other 6,023 6,272 Total deferred tax assets 55,512 64,050 Deferred tax liabilities: Goodwill and other intangibles (11,995 ) (9,099 ) Premises and equipment (3,131 ) (4,390 ) Excess carrying value of FDIC indemnification asset and clawback liability (326 ) (4,280 ) Other (1,176 ) (1,578 ) Total deferred tax liabilities (16,628 ) (19,347 ) Net deferred tax assets $ 38,884 $ 44,703

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-Based Compensation, Restricted Stock Units Award Activity	The following is a summary of the Plans’ restricted share and performance-based stock award activity as of June 30, 2015 : Restricted Shares Common Shares Weighted-Average Restricted shares, October 1, 2014 — $ — Granted 81,419 18.18 Vested and issued — — Forfeited (556 ) 18.00 Canceled — — Restricted shares, June 30, 2015 80,863 $ 18.18 Vested, but not issuable at June 30, 2015 12,221 $ 18.00 Performance Shares Performance shares, October 1, 2014 — $ — Granted 221,294 18.00 Vested and issued — — Forfeited (7,761 ) 18.00 Canceled — — Performance shares, June 30, 2015 213,533 $ 18.00

Fair Value of Financial Instr40

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Fair Value Measurements, Assets and Liabilities	The following table presents the fair value measurements of assets and liabilities recognized in the accompanying consolidated balance sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands): Fair Value Level 1 Level 2 Level 3 As of June 30, 2015 U.S. Treasury securities $ 303,132 $ 303,132 $ — $ — U.S. Agency securities 74,375 74,375 — — Mortgage-backed securities 1,025,026 — 1,025,026 — States and political subdivision securities 1,864 — 30 1,834 Corporate debt securities 5,030 — 5,030 — Other 1,048 — 1,048 — Securities available for sale $ 1,410,475 $ 377,507 $ 1,031,134 $ 1,834 Derivatives-assets $ 1 $ — $ 1 $ — Derivatives-liabilities 24,426 — 24,426 — Fair value loans and written loan commitments 1,063,665 — 1,063,665 — Fair Value Level 1 Level 2 Level 3 As of September 30, 2014 U.S. Treasury securities $ 222,725 $ 222,725 $ — $ — U.S. Agency securities — — — — Mortgage-backed securities 1,103,415 — 1,103,415 — States and political subdivision securities 2,189 — 160 2,029 Corporate debt securities 11,873 — 11,873 — Other 1,040 — 1,040 — Securities available for sale $ 1,341,242 $ 222,725 $ 1,116,488 $ 2,029 Derivatives-assets $ 19 $ — $ 19 $ — Derivatives-liabilities 13,092 — 13,092 — Fair value loans and written loan 985,411 — 985,411 —
Schedule of Available-for-Sale Securities Reconciliation	The following table presents the changes in Level 3 financial instruments for the three months ended June 30, 2015 and 2014 (in thousands): Other Securities Available for Sale Balance as of March 31, 2015 $ 1,958 Principal paydown (124 ) Balance as of June 30, 2015 $ 1,834 Balance as of March 31, 2014 $ 2,243 Principal paydown — Balance as of June 30, 2014 $ 2,243 The following table presents the changes in Level 3 financial instruments for the nine months ended June 30, 2015 and 2014 (in thousands): Other Securities Available for Sale Balance as of September 30, 2014 $ 2,029 Principal paydown (195 ) Balance as of June 30, 2015 $ 1,834 Balance as of September 30, 2013 $ 2,243 Principal paydown — Balance as of June 30, 2014 $ 2,243
Mortgage Loans Held-for-Sale, Fair Value Measurement	The following tables present the fair value measurement of assets and liabilities measured at fair value on a nonrecurring basis and the level within the fair value hierarchy in which the fair value measurements fall at June 30, 2015 and September 30, 2014 (in thousands): Fair Value Level 1 Level 2 Level 3 As of June 30, 2015 Other real estate owned $ 13,051 $ — $ — $ 13,051 Impaired loans 166,841 — — 166,841 Loans held for sale, at lower of cost or fair value 9,173 — 9,173 — As of September 30, 2014 Other real estate owned $ 36,879 $ — $ — $ 36,879 Impaired loans 111,265 — — 111,265 Loans held for sale, at lower of cost or fair 10,381 — 10,381 —
Mortgage Loans Held-for-Sale, Recurring and Nonrecurring Fair Value Measurements	The valuation techniques and significant unobservable inputs used to measure Level 3 fair value measurements at June 30, 2015 were as follows (in thousands): Financial Instrument Fair Value of Assets / (Liabilities) at June 30, 2015 Valuation Technique(s) Unobservable Input Range Weighted Average Other real estate owned $ 13,051 Appraisal value Property specific adjustment N/A N/A Impaired loans $ 166,841 Appraisal value Property N/A N/A
Fair Value, by Balance Sheet Grouping	Fair values for balance sheet instruments as of June 30, 2015 and September 30, 2014 , are as follows (in thousands): June 30, 2015 September 30, 2014 Level in Fair Value Hierarchy Carrying Fair Value Carrying Fair Value Assets Cash and due from banks Level 1 $ 187,171 $ 187,171 $ 256,639 $ 256,639 Loans, net excluding fair valued loans and loans held for sale Level 3 6,116,471 6,099,234 5,744,157 5,734,274 Accrued interest receivable Level 2 39,528 39,528 42,609 42,609 Federal Home Loan Bank stock Level 2 36,287 36,287 35,922 35,922 Liabilities Deposits Level 3 $ 7,357,688 $ 7,384,060 $ 7,052,180 $ 7,057,591 FHLB advances, related party notes payable, and other borrowings Level 2 631,815 624,431 616,389 604,615 Securities sold under repurchase agreements Level 2 161,559 161,559 161,687 161,687 Accrued interest payable Level 2 4,211 4,211 5,273 5,273 Subordinated debentures Level 2 56,083 56,071 56,083 56,084

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings per Share	The following information was used in the computation of basic earnings per share (EPS) for the three and nine months ended June 30, 2015 and 2014 (in thousands except share data). Three Months Ended Nine Months Ended 2015 2014 2015 2014 Net income $ 28,832 $ 22,502 $ 75,253 $ 77,077 Weighted average common shares outstanding 57,898,335 57,886,114 57,897,484 57,886,114 Dilutive effect of stock based compensation 60,867 — 31,704 — Weighted average common shares outstanding for diluted earnings per share calculation 57,959,202 57,886,114 57,929,188 57,886,114 Basic earnings per share $ 0.50 $ 0.39 $ 1.30 $ 1.33 Diluted earnings per share $ 0.50 $ 0.39 $ 1.30 $ 1.33

Basis of Presentation - Schedul

Basis of Presentation - Schedule of Error Correction on Realized Gain (Loss) on Derivatives (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Noninterest income
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Realized (loss) on derivatives	$ (13,277)	$ (10,207)	$ (18,255)	$ (14,217)	$ (9,931)
Immaterial error correction | Interest income
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Realized (loss) on derivatives	$ (13,277)	$ (10,207)	$ (18,255)	$ (14,217)	$ (9,931)

Basis of Presentation - Sched43

Basis of Presentation - Schedule of Fair Value of Loans, Correction (Details) - USD ($)	Jul. 31, 2015	Jul. 27, 2015	May. 06, 2015	Oct. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Dividends declared per share (in dollars per share)					$ 0.12	$ 0.59	$ 0.24	$ 1.17
Change in fair value of loans					$ (24,394,000)	$ 13,886,000	$ 7,914,000	$ 13,506,000
Net increase (decrease) in fair value of loans at fair value | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Loan fair value change related to interest rates								(12,119,000)	$ 41,635,000	$ (11,922,000)	$ 40,305,000	$ (19,369,000)
Loan fair value change related to credit quality								(1,387,000)	141,000	18,000	855,000	4,276,000
Reclassification adjustment								(13,506,000)	41,776,000	(11,904,000)	41,160,000	(15,093,000)
Derivatives, net realized and unrealized gain (loss) | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Reclassification adjustment								12,119,000	(41,635,000)	11,922,000	(40,305,000)	19,369,000
Change in presentation of changes in fair value of fair value loans | Interest income | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Loan fair value change related to interest rates								(12,119,000)	41,635,000	(11,922,000)	40,305,000	(19,369,000)
Loan fair value change related to credit quality								(1,387,000)	141,000	18,000	855,000	4,276,000
Change in fair value of loans								(13,506,000)	41,776,000	(11,904,000)	41,160,000	(15,093,000)
Change in presentation of gain (loss) for derivatives related to fair value loans | Noninterest expense | Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Unrealized loss on derivatives								$ 12,119,000	$ (41,635,000)	$ 11,922,000	$ (40,305,000)	$ 19,369,000
National Australia Bank Limited
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of shares sold by company			23,000,000	18,400,000
Shares sold by parent, percentage of company stock			39.70%	31.80%
Ownership percentage by parent			28.50%
Subsequent event
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Stock repurchased during period (shares)	2,666,518
Dividends declared per share (in dollars per share)		$ 0.12
Repayments of subordinated capital notes and revolving line of credit	$ 41,300,000
Subsequent event | National Australia Bank Limited
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of shares sold by company	13,819,596
Subordinated debt | Subsequent event
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Issuance of debt	$ 35,000,000

Restrictions on Cash and Due 44

Restrictions on Cash and Due from Banks (Details) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Cash and Cash Equivalents [Abstract]
Reserve balances	$ 42.9	$ 50.4

Securities Available for Sale -

Securities Available for Sale - (Narrative) (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2015USD ($)security	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)security	Jun. 30, 2014USD ($)	Sep. 30, 2014USD ($)security
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales of securities available for sale	$ 0	$ 0	$ 55,149,000	$ 4,450,000
Available-for-sale securities, gross realized gains	0	0	600,000	0
Available-for-sale securities, gross realized losses	0	$ 0	500,000	$ 0
Securities pledged as collateral	$ 974,200,000		$ 974,200,000		$ 1,132,300,000
Percentage of investment portfolio in continuous loss position	52.00%		52.00%		64.00%
Number of securities in an unrealized loss position (securities) | security	47		47		49
Federal home loan bank stock	$ 36,300,000		$ 36,300,000		$ 35,900,000

Securities Available for Sale46

Securities Available for Sale - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	$ 1,413,255	$ 1,351,157
Gross Unrealized Gains	5,825	4,846
Gross Unrealized Losses	(8,605)	(14,761)
Fair Value	1,410,475	1,341,242
U.S. Treasury securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	300,501	222,868
Gross Unrealized Gains	2,744	31
Gross Unrealized Losses	(113)	(174)
Fair Value	303,132	222,725
U.S. Agency securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	74,379	0
Gross Unrealized Gains	53	0
Gross Unrealized Losses	(57)	0
Fair Value	74,375	0
States and political subdivision securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	1,864	2,188
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Fair Value	1,864	2,189
Corporate debt securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	4,996	11,732
Gross Unrealized Gains	34	141
Gross Unrealized Losses	0	0
Fair Value	5,030	11,873
Other
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	1,006	1,006
Gross Unrealized Gains	42	34
Gross Unrealized Losses	0	0
Fair Value	1,048	1,040
Government National Mortgage Association | Mortgage backed-securities, Issued by US Government
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	905,660	1,113,363
Gross Unrealized Gains	2,952	4,639
Gross Unrealized Losses	(7,055)	(14,587)
Fair Value	901,557	1,103,415
Federal National Mortgage Association | Mortgage backed-securities, Issued by US Government
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	47,727	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(377)	0
Fair Value	47,350	0
Small Business Assistance Program | Mortgage backed-securities, Issued by US Government
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized Cost	77,122	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,003)	0
Fair Value	$ 76,119	$ 0

Securities Available for Sale47

Securities Available for Sale - Schedule of Available For Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Amortized Cost
Due in one year or less	$ 75,053	$ 7,207
Due after one year through five years	305,648	223,282
Due after five years through ten years	1,039	6,299
Amortized Cost	381,740	236,788
Fair Value
Due in one year or less	75,050	7,218
Due after one year through five years	308,312	223,140
Due after five years through ten years	1,039	6,429
Fair Value	384,401	236,787
Amortized Cost	1,413,255	1,351,157
Fair Value	1,410,475	1,341,242
Securities without contractual maturities, Amortized Cost	1,006	1,006
Securities without contractual maturities, Fair Value	1,048	1,040
Mortgage-backed securities
Fair Value
Amortized Cost	1,030,509	1,113,363
Fair Value	$ 1,025,026	$ 1,103,415

Securities Available for Sale48

Securities Available for Sale - Schedule of Gross Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	$ 228,945	$ 122,969
12 months or more, Fair Value	507,944	730,171
Fair Value	736,889	853,140
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(1,777)	(299)
12 months or more, Unrealized	(6,828)	(14,462)
Unrealized	(8,605)	(14,761)
U.S. Treasury securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	18,364	98,344
12 months or more, Fair Value	0	0
Fair Value	18,364	98,344
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(113)	(174)
12 months or more, Unrealized	0	0
Unrealized	(113)	(174)
U.S. Agency securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	49,577	0
12 months or more, Fair Value	0	0
Fair Value	49,577	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(57)	0
12 months or more, Unrealized	0	0
Unrealized	(57)	0
Mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months, Fair Value	161,004	24,625
12 months or more, Fair Value	507,944	730,171
Fair Value	668,948	754,796
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 months, Unrealized	(1,607)	(125)
12 months or more, Unrealized	(6,828)	(14,462)
Unrealized	$ (8,435)	$ (14,587)

Securities Available for Sale49

Securities Available for Sale - Unrealized Gain (Loss) On Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Beginning balance accumulated other comprehensive income (loss)	$ 2,111	$ (7,214)	$ (6,157)	$ (7,081)
Net unrealized holding gain (loss) arising during the period	(6,099)	7,752	7,186	7,363
Reclassification adjustment for net gain realized in net income	0	0	(51)	(6)
Net change in unrealized gain (loss) before income taxes	(6,099)	7,752	7,135	7,357
Income tax (expense) benefit	2,254	(2,946)	(2,712)	(2,684)
Net change in unrealized gain (loss) on securities after taxes	(3,845)	4,806	4,423	4,673
Ending balance accumulated other comprehensive income (loss)	$ (1,734)	$ (2,408)	$ (1,734)	$ (2,408)

Loans - Narrative (Details)

Loans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans covered by FDIC loss share agreements	$ 102,203		$ 102,203			$ 234,036
Loan held for sale	9,173		9,173			10,381
Loans and written loan commitments at fair value under the fair value option	1,063,665		1,063,665			985,411
Unamortized discount on acquired loans	6,800		6,800			6,300
Loans in process	(400)		(400)			600
Loans guaranteed by U.S. Government Agencies	6,070,236		6,070,236			5,692,071
Principal balances of residential real estate loans sold	79,500	$ 58,400	213,400	$ 146,300
Average recorded investment	192,600	165,200	177,000	170,500
Interest income recognized on impaired loans	2,300	1,200	7,100	4,600
Valuation adjustments made to repossessed properties	1,200	$ 8,200	5,600	$ 9,300
Specific reserves included in the allowance for loan losses for TDRs	3,000		3,000			3,200
Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and written loan commitments at fair value under the fair value option	1,063,700		1,063,700		$ 985,400
Loans Guaranteed by US Government Authorities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans guaranteed by U.S. Government Agencies	$ 108,600		$ 108,600			$ 106,500

Loans - Schedule of Financing R

Loans - Schedule of Financing Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	$ 7,272,040		$ 6,819,977
Allowance for loan losses	(55,930)	$ (52,426)	(47,518)	$ (47,038)	$ (47,153)	$ (55,864)
Unamortized discount on acquired loans	(20,356)		(25,638)
Unearned net deferred fees and costs and loans in process	(6,445)		(6,872)
Total financing receivables, net	7,189,309		6,739,949
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	922,481		901,605
Allowance for loan losses	(6,552)	(7,495)	(8,342)	(10,414)	(10,277)	(11,779)
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	2,720,993		2,541,194
Allowance for loan losses	(17,836)	(15,736)	(16,884)	(18,055)	(17,603)	(22,562)
Commercial non real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	1,701,024		1,571,640
Allowance for loan losses	(16,950)	(15,957)	(10,550)	(9,587)	(10,275)	(11,222)
Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	1,813,330		1,681,209
Allowance for loan losses	(13,366)	(12,222)	(10,655)	(7,740)	(7,903)	(9,296)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	75,311		90,086
Allowance for loan losses	(353)	(189)	(264)	(392)	(430)	(312)
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total financing receivables, gross	38,901		34,243
Allowance for loan losses	$ (873)	$ (827)	$ (823)	$ (850)	$ (665)	$ (693)

Loans - Past Due Loans (Details

Loans - Past Due Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	$ 59,843	$ 43,945
Financing receivables, net of unamortized discount on acquired loans	6,085,813	5,574,881
Loans covered by FDIC loss sharing agreements	102,203	234,036
Total	6,188,016	5,808,917
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	7,846	6,671
Financing receivables, net of unamortized discount on acquired loans	811,578	764,754
Loans covered by FDIC loss sharing agreements	102,203	127,115
Total	913,781	891,869
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	22,000	20,767
Financing receivables, net of unamortized discount on acquired loans	2,413,176	2,003,838
Loans covered by FDIC loss sharing agreements	0	95,467
Total	2,413,176	2,099,305
Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	8,198	4,908
Financing receivables, net of unamortized discount on acquired loans	1,264,583	1,312,658
Loans covered by FDIC loss sharing agreements	0	9,390
Total	1,264,583	1,322,048
Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	21,709	11,453
Financing receivables, net of unamortized discount on acquired loans	1,482,311	1,369,549
Loans covered by FDIC loss sharing agreements	0	2,004
Total	1,482,311	1,371,553
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans, excluding loans covered under FDIC loss-sharing arrangements	90	146
Financing receivables, net of unamortized discount on acquired loans	75,264	89,839
Loans covered by FDIC loss sharing agreements	0	60
Total	75,264	89,899
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	38,901	34,243
Loans covered by FDIC loss sharing agreements	0	0
Total	38,901	34,243
Current
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	6,053,214	5,542,128
Loans covered by FDIC loss sharing agreements	99,553	227,096
Total	6,152,767	5,769,224
Current | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	806,716	760,887
Current | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	2,402,342	1,988,585
Current | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,257,382	1,303,925
Current | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,472,970	1,364,960
Current | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	74,903	89,528
Current | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	38,901	34,243
Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	32,599	32,753
Loans covered by FDIC loss sharing agreements	2,650	6,940
Total	35,249	39,693
Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	4,862	3,867
Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	10,834	15,253
Past Due | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	7,201	8,733
Past Due | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	9,341	4,589
Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	361	311
Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	0	0
Past Due | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	9,573	13,746
Loans covered by FDIC loss sharing agreements	1,267	1,960
Total	10,840	15,706
Past Due | 30-59 Days Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	734	675
Past Due | 30-59 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	5,194	11,050
Past Due | 30-59 Days Past Due | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,867	1,761
Past Due | 30-59 Days Past Due | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,650	16
Past Due | 30-59 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	128	244
Past Due | 30-59 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	0	0
Past Due | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	2,495	8,044
Loans covered by FDIC loss sharing agreements	371	1,252
Total	2,866	9,296
Past Due | 60-89 Days Past Due | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	644	611
Past Due | 60-89 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	1,313	819
Past Due | 60-89 Days Past Due | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	121	6,228
Past Due | 60-89 Days Past Due | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	221	368
Past Due | 60-89 Days Past Due | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	196	18
Past Due | 60-89 Days Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	0	0
Past Due | Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	20,531	10,963
Loans covered by FDIC loss sharing agreements	1,012	3,728
Total	21,543	14,691
Past Due | Greater Than 90 Days | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	3,484	2,581
Past Due | Greater Than 90 Days | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	4,327	3,384
Past Due | Greater Than 90 Days | Commercial non real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	5,213	744
Past Due | Greater Than 90 Days | Agriculture
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	7,470	4,205
Past Due | Greater Than 90 Days | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	37	49
Past Due | Greater Than 90 Days | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivables, net of unamortized discount on acquired loans	$ 0	$ 0

Loans - Composition of the Loan

Loans - Composition of the Loan Portfolio by Internal Risk Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	$ 6,085,813	$ 5,574,881
Loans covered by FDIC loss share agreements	102,203	234,036
Total	6,188,016	5,808,917
Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	5,577,672	5,159,494
Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	322,256	287,723
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	182,756	125,830
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	2,894	1,659
Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	235	175
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	811,578	764,754
Loans covered by FDIC loss share agreements	102,203	127,115
Total	913,781	891,869
Residential real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	794,153	747,485
Residential real estate | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	5,142	5,320
Residential real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	11,895	11,290
Residential real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	384	659
Residential real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	4	0
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	2,413,176	2,003,838
Loans covered by FDIC loss share agreements	0	95,467
Total	2,413,176	2,099,305
Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	2,260,026	1,867,866
Commercial real estate | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	98,836	84,132
Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	54,109	51,692
Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	205	148
Commercial real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Commercial non real estate
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,264,583	1,312,658
Loans covered by FDIC loss share agreements	0	9,390
Total	1,264,583	1,322,048
Commercial non real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,147,017	1,218,558
Commercial non real estate | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	51,606	65,628
Commercial non real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	64,768	27,499
Commercial non real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,192	798
Commercial non real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	175
Agriculture
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,482,311	1,369,549
Loans covered by FDIC loss share agreements	0	2,004
Total	1,482,311	1,371,553
Agriculture | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,262,624	1,202,145
Agriculture | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	166,583	132,262
Agriculture | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	51,761	35,107
Agriculture | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1,112	35
Agriculture | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	231	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	75,264	89,839
Loans covered by FDIC loss share agreements	0	60
Total	75,264	89,899
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	74,951	89,197
Consumer | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	89	381
Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	223	242
Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	1	19
Consumer | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	38,901	34,243
Loans covered by FDIC loss share agreements	0	0
Total	38,901	34,243
Other | Pass
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	38,901	34,243
Other | Watchlist
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	0	0
Other | Loss
Financing Receivable, Recorded Investment [Line Items]
Total financing receivables	$ 0	$ 0

Loans - Impaired Financing Rece

Loans - Impaired Financing Receivables (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 211,518	$ 145,592
Unpaid Principal Balance	224,035	153,665
Related Allowance	16,109	9,679
Average Recorded Investment	177,055	160,781
Residential real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	12,481	12,107
Unpaid Principal Balance	12,678	12,737
Related Allowance	2,582	2,529
Average Recorded Investment	12,294	13,572
Commercial real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	77,015	62,155
Unpaid Principal Balance	78,947	64,597
Related Allowance	3,006	2,017
Average Recorded Investment	69,585	84,490
Commercial non real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	68,694	35,522
Unpaid Principal Balance	78,557	37,882
Related Allowance	6,733	3,927
Average Recorded Investment	50,608	31,827
Agriculture
Financing Receivable, Impaired [Line Items]
Recorded Investment	53,104	35,528
Unpaid Principal Balance	53,541	37,958
Related Allowance	3,743	1,155
Average Recorded Investment	44,316	30,546
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	224	280
Unpaid Principal Balance	312	491
Related Allowance	45	51
Average Recorded Investment	$ 252	$ 346

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructurings on Accruing and Nonaccrual Financing Receivables (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015USD ($)contract	Jun. 30, 2014USD ($)contract	Jun. 30, 2015USD ($)contract	Jun. 30, 2014USD ($)contract	Sep. 30, 2014USD ($)
Accruing
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 54,916		$ 54,916		$ 36,857
Financing receivable, modifications, number of contracts | contract	3	6	20	24
Financing receivable, modifications, pre-modification recorded investment	$ 627	$ 4,150	$ 28,584	$ 8,267
Financing receivable, modifications, post-modification recorded investment	$ 627	$ 4,150	$ 28,494	$ 8,267
Change in recorded investment due to principal paydown at time of modification, number of contracts | contract	0	0	0	0
Change in recorded investment due to principal paydown at time of modification, pre-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to principal paydown at time of modification, post-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to chargeoffs at time of modification, number of contracts | contract	0	0	1	0
Change in recorded investment due to chargeoffs at time of modification, pre-modification	$ 0	$ 0	$ 90	$ 0
Change in recorded investment due to chargeoffs at time of modification, post-modification	0	$ 0	0	$ 0
Accruing | Residential real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 668		$ 668		1,112
Financing receivable, modifications, number of contracts | contract	1	1	3	5
Financing receivable, modifications, pre-modification recorded investment	$ 35	$ 35	$ 71	$ 254
Financing receivable, modifications, post-modification recorded investment	35	$ 35	71	$ 254
Accruing | Commercial real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 44,170		$ 44,170		25,177
Financing receivable, modifications, number of contracts | contract	1	1	9	2
Financing receivable, modifications, pre-modification recorded investment	$ 574	$ 1,841	$ 23,704	$ 2,911
Financing receivable, modifications, post-modification recorded investment	574	$ 1,841	23,614	$ 2,911
Accruing | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 9,961		$ 9,961		6,753
Financing receivable, modifications, number of contracts | contract	0	3	6	12
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 2,263	$ 4,785	$ 5,059
Financing receivable, modifications, post-modification recorded investment	0	$ 2,263	4,785	$ 5,059
Accruing | Agriculture
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 80		$ 80		3,780
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 0
Accruing | Consumer
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 37		$ 37		35
Financing receivable, modifications, number of contracts | contract	1	1	2	5
Financing receivable, modifications, pre-modification recorded investment	$ 18	$ 11	$ 24	$ 43
Financing receivable, modifications, post-modification recorded investment	$ 18	$ 11	$ 24	$ 43
Accruing | Rate modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 15	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 15	$ 0
Accruing | Rate modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Rate modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 32	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 32	$ 0
Accruing | Rate modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Rate modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Term extension | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	1	2
Financing receivable, modifications, pre-modification recorded investment	$ 35	$ 0	$ 35	$ 74
Financing receivable, modifications, post-modification recorded investment	$ 35	$ 0	$ 35	$ 74
Accruing | Term extension | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	2	0
Financing receivable, modifications, pre-modification recorded investment	$ 574	$ 0	$ 664	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 574	$ 0	$ 574	$ 0
Accruing | Term extension | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	3	5
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 79	$ 2,879	$ 1,813
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 79	$ 2,879	$ 1,813
Accruing | Term extension | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Term extension | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Payment modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 35	$ 0	$ 50
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 35	$ 0	$ 50
Accruing | Payment modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	6	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 1,841	$ 22,542	$ 2,911
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 1,841	$ 22,542	$ 2,911
Accruing | Payment modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	2	5
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 2,182	$ 1,874	$ 2,917
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 2,182	$ 1,874	$ 2,917
Accruing | Payment modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Payment modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	1	3
Financing receivable, modifications, pre-modification recorded investment	$ 18	$ 11	$ 18	$ 15
Financing receivable, modifications, post-modification recorded investment	$ 18	$ 11	$ 18	$ 15
Accruing | Bankruptcy | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 130
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 130
Accruing | Bankruptcy | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 498	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 498	$ 0
Accruing | Bankruptcy | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Bankruptcy | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Bankruptcy | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 6	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 6	$ 0
Accruing | Other | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 21	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 21	$ 0
Accruing | Other | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Other | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	1	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 2	$ 0	$ 329
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 2	$ 0	$ 329
Accruing | Other | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Accruing | Other | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 28
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 28
Nonaccrual
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 14,764		$ 14,764		20,415
Financing receivable, modifications, number of contracts | contract	6	3	15	29
Financing receivable, modifications, pre-modification recorded investment	$ 126	$ 55	$ 568	$ 5,238
Financing receivable, modifications, post-modification recorded investment	$ 34	$ 55	$ 476	$ 5,238
Change in recorded investment due to principal paydown at time of modification, number of contracts | contract	0	0	0	0
Change in recorded investment due to principal paydown at time of modification, pre-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to principal paydown at time of modification, post-modification	$ 0	$ 0	$ 0	$ 0
Change in recorded investment due to chargeoffs at time of modification, number of contracts | contract	2	0	2	0
Change in recorded investment due to chargeoffs at time of modification, pre-modification	$ 92	$ 0	$ 92	$ 0
Change in recorded investment due to chargeoffs at time of modification, post-modification	0	$ 0	0	$ 0
Nonaccrual | Residential real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 1,536		$ 1,536		1,730
Financing receivable, modifications, number of contracts | contract	3	2	7	10
Financing receivable, modifications, pre-modification recorded investment	$ 44	$ 19	$ 268	$ 177
Financing receivable, modifications, post-modification recorded investment	29	$ 19	253	$ 177
Nonaccrual | Commercial real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 4,680		$ 4,680		6,884
Financing receivable, modifications, number of contracts | contract	0	0	0	5
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 4,618
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 4,618
Nonaccrual | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 1,101		$ 1,101		1,785
Financing receivable, modifications, number of contracts | contract	2	1	6	10
Financing receivable, modifications, pre-modification recorded investment	$ 81	$ 36	$ 298	$ 171
Financing receivable, modifications, post-modification recorded investment	4	$ 36	221	$ 171
Nonaccrual | Agriculture
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 7,440		$ 7,440		9,994
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 260
Financing receivable, modifications, post-modification recorded investment	0	$ 0	0	$ 260
Nonaccrual | Consumer
Financing Receivable, Modifications [Line Items]
Recorded value of TDR balance	$ 7		$ 7		$ 22
Financing receivable, modifications, number of contracts | contract	1	0	2	2
Financing receivable, modifications, pre-modification recorded investment	$ 1	$ 0	$ 2	$ 12
Financing receivable, modifications, post-modification recorded investment	$ 1	$ 0	$ 2	$ 12
Nonaccrual | Rate modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	2	4
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 104	$ 98
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 104	$ 98
Nonaccrual | Rate modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 500
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 500
Nonaccrual | Rate modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Rate modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Rate modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Term extension | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	2	3
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 8	$ 77	$ 26
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 8	$ 77	$ 26
Nonaccrual | Term extension | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 4,031
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 4,031
Nonaccrual | Term extension | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	5	8
Financing receivable, modifications, pre-modification recorded investment	$ 77	$ 0	$ 294	$ 125
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 217	$ 125
Nonaccrual | Term extension | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	2
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 260
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 260
Nonaccrual | Term extension | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	2	1
Financing receivable, modifications, pre-modification recorded investment	$ 1	$ 0	$ 2	$ 11
Financing receivable, modifications, post-modification recorded investment	$ 1	$ 0	$ 2	$ 11
Nonaccrual | Payment modification | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 19	$ 11	$ 19	$ 11
Financing receivable, modifications, post-modification recorded investment	$ 19	$ 11	$ 19	$ 11
Nonaccrual | Payment modification | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Payment modification | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	1	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 4	$ 36	$ 4	$ 36
Financing receivable, modifications, post-modification recorded investment	$ 4	$ 36	$ 4	$ 36
Nonaccrual | Payment modification | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Payment modification | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Bankruptcy | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 43	$ 4
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 43	$ 4
Nonaccrual | Bankruptcy | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Bankruptcy | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 10
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 10
Nonaccrual | Bankruptcy | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Bankruptcy | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Other | Residential real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	1	0	1	1
Financing receivable, modifications, pre-modification recorded investment	$ 25	$ 0	$ 25	$ 38
Financing receivable, modifications, post-modification recorded investment	$ 10	$ 0	$ 10	$ 38
Nonaccrual | Other | Commercial real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 87
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 87
Nonaccrual | Other | Commercial non real estate
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Other | Agriculture
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	0
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 0
Nonaccrual | Other | Consumer
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, number of contracts | contract	0	0	0	1
Financing receivable, modifications, pre-modification recorded investment	$ 0	$ 0	$ 0	$ 1
Financing receivable, modifications, post-modification recorded investment	$ 0	$ 0	$ 0	$ 1

Loans - Subsequent Defaults on

Loans - Subsequent Defaults on Modified Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015USD ($)contract	Jun. 30, 2014USD ($)contract	Jun. 30, 2015USD ($)contract	Jun. 30, 2014USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Loans	6	1	11	15
Recorded Investment | $	$ 824	$ 15	$ 1,167	$ 15,288
Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans	1	0	4	2
Recorded Investment | $	$ 10	$ 0	$ 353	$ 337
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0	0	2
Recorded Investment | $	$ 0	$ 0	$ 0	$ 7,053
Commercial non real estate
Financing Receivable, Modifications [Line Items]
Number of Loans	2	1	4	4
Recorded Investment | $	$ 32	$ 15	$ 32	$ 537
Agriculture
Financing Receivable, Modifications [Line Items]
Number of Loans	3	0	3	7
Recorded Investment | $	$ 782	$ 0	$ 782	$ 7,361
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0	0	0
Recorded Investment | $	$ 0	$ 0	$ 0	$ 0

Allowance for Loan Losses - (Na

Allowance for Loan Losses - (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and written loan commitments at fair value under the fair value option	$ 1,063,665	$ 985,411
Loan held for sale	9,173	10,381
Guaranteed loans	108,600	106,500
Unfunded loan commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 400	$ 400

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	$ 52,426	$ 47,153	$ 47,518	$ 55,864
Charge-offs	(2,492)	(3,370)	(13,703)	(11,194)
Recoveries	1,586	1,755	4,707	4,433
Provision	4,991	1,500	18,600	(125)
Allowance for loan losses, ending balance	55,930	47,038	55,930	47,038
Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	7,495	10,277	8,342	11,779
Charge-offs	(77)	(144)	(197)	(581)
Recoveries	84	94	197	190
Provision	(325)	187	(515)	201
Allowance for loan losses, ending balance	6,552	10,414	6,552	10,414
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	15,736	17,603	16,884	22,562
Charge-offs	(280)	(539)	(1,932)	(3,733)
Recoveries	205	497	300	1,521
Provision	2,130	494	2,476	(2,903)
Allowance for loan losses, ending balance	17,836	18,055	17,836	18,055
Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	15,957	10,275	10,550	11,222
Charge-offs	(1,337)	(1,884)	(9,861)	(2,883)
Recoveries	949	469	3,092	1,228
Provision	1,381	727	13,169	1,461
Allowance for loan losses, ending balance	16,950	9,587	16,950	9,587
Agriculture
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	12,222	7,903	10,655	9,296
Charge-offs	(411)	(566)	(438)	(2,652)
Recoveries	10	14	89	29
Provision	1,545	389	3,060	1,067
Allowance for loan losses, ending balance	13,366	7,740	13,366	7,740
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	189	430	264	312
Charge-offs	(31)	(39)	(88)	(191)
Recoveries	32	69	79	136
Provision	164	(68)	123	67
Allowance for loan losses, ending balance	353	392	353	392
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance	827	665	823	693
Charge-offs	(356)	(198)	(1,187)	(1,154)
Recoveries	306	612	950	1,329
Provision	96	(229)	287	(18)
Allowance for loan losses, ending balance	873	850	873	850
Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			3,454
(Impairment) improvement of loans acquired with deteriorated credit quality	(581)	0	(1,192)	(1,940)
Allowance for loan losses, ending balance	2,765		2,765
Receivables acquired with deteriorated credit quality | Residential real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			2,784
(Impairment) improvement of loans acquired with deteriorated credit quality	(625)	0	(1,275)	(1,175)
Allowance for loan losses, ending balance	1,510		1,510
Receivables acquired with deteriorated credit quality | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			645
(Impairment) improvement of loans acquired with deteriorated credit quality	45	0	108	608
Allowance for loan losses, ending balance	1,255		1,255
Receivables acquired with deteriorated credit quality | Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			0
(Impairment) improvement of loans acquired with deteriorated credit quality	0	0	0	(1,441)
Allowance for loan losses, ending balance	0		0
Receivables acquired with deteriorated credit quality | Agriculture
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			0
(Impairment) improvement of loans acquired with deteriorated credit quality	0	0	0	0
Allowance for loan losses, ending balance	0		0
Receivables acquired with deteriorated credit quality | Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			25
(Impairment) improvement of loans acquired with deteriorated credit quality	(1)	0	(25)	68
Allowance for loan losses, ending balance	0		0
Receivables acquired with deteriorated credit quality | Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for loan losses, beginning balance			0
(Impairment) improvement of loans acquired with deteriorated credit quality	0	$ 0	0	$ 0
Allowance for loan losses, ending balance	$ 0		$ 0

Allowance for Loan Losses - S59

Allowance for Loan Losses - Summary of Allowance for Loan Losses by Type (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 15,960		$ 9,593
Collectively evaluated for impairment	35,455		32,219
Total allowance	55,930	$ 52,426	47,518	$ 47,038	$ 47,153	$ 55,864
Financing Receivables
Individually evaluated for impairment	166,841		101,960
Collectively evaluated for impairment	5,599,173		5,187,130
Loans Outstanding	6,070,236		5,692,071
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,581		2,528
Collectively evaluated for impairment	2,461		3,030
Total allowance	6,552	7,495	8,342	10,414	10,277	11,779
Financing Receivables
Individually evaluated for impairment	9,125		9,384
Collectively evaluated for impairment	709,265		649,970
Loans Outstanding	903,030		879,971
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,879		1,953
Collectively evaluated for impairment	11,952		12,034
Total allowance	17,836	15,736	16,884	18,055	17,603	22,562
Financing Receivables
Individually evaluated for impairment	47,069		38,457
Collectively evaluated for impairment	2,225,924		1,874,474
Loans Outstanding	2,362,313		2,057,456
Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	6,712		3,909
Collectively evaluated for impairment	10,238		6,641
Total allowance	16,950	15,957	10,550	9,587	10,275	11,222
Financing Receivables
Individually evaluated for impairment	67,369		28,298
Collectively evaluated for impairment	1,140,921		1,224,035
Loans Outstanding	1,216,624		1,266,103
Agriculture
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	3,743		1,152
Collectively evaluated for impairment	9,623		9,503
Total allowance	13,366	12,222	10,655	7,740	7,903	9,296
Financing Receivables
Individually evaluated for impairment	43,113		25,655
Collectively evaluated for impairment	1,411,741		1,319,343
Loans Outstanding	1,474,104		1,364,399
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	45		51
Collectively evaluated for impairment	308		188
Total allowance	353	189	264	392	430	312
Financing Receivables
Individually evaluated for impairment	165		166
Collectively evaluated for impairment	72,421		85,065
Loans Outstanding	75,264		89,899
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	873		823
Total allowance	873	$ 827	823	$ 850	$ 665	$ 693
Financing Receivables
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	38,901		34,243
Loans Outstanding	38,901		34,243
Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	2,765		3,454
Financing Receivables
Loans Outstanding	115,801		162,139
Receivables acquired with deteriorated credit quality | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,510		2,784
Financing Receivables
Loans Outstanding	86,569		102,987
Receivables acquired with deteriorated credit quality | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,255		645
Financing Receivables
Loans Outstanding	23,402		49,202
Receivables acquired with deteriorated credit quality | Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	2,889		6,361
Receivables acquired with deteriorated credit quality | Agriculture
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	1,567		1,746
Receivables acquired with deteriorated credit quality | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		25
Financing Receivables
Loans Outstanding	1,374		1,843
Receivables acquired with deteriorated credit quality | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	0		0
Receivables acquired without deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,750		2,252
Financing Receivables
Loans Outstanding	188,421		240,842
Receivables acquired without deteriorated credit quality | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	98,071		117,630
Receivables acquired without deteriorated credit quality | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	1,750		2,252
Financing Receivables
Loans Outstanding	65,918		95,323
Receivables acquired without deteriorated credit quality | Commercial non real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	5,445		7,409
Receivables acquired without deteriorated credit quality | Agriculture
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	17,683		17,655
Receivables acquired without deteriorated credit quality | Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	1,304		2,825
Receivables acquired without deteriorated credit quality | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance	0		0
Financing Receivables
Loans Outstanding	$ 0		$ 0

Accounting for Certain Loans 60

Accounting for Certain Loans Acquired with Deteriorated Credit Quality - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Receivables [Abstract]
Allowance recognized on previous impairments	$ 0.9	$ 0	$ 1.9	$ 3.6

Accounting for Certain Loans 61

Accounting for Certain Loans Acquired with Deteriorated Credit Quality - Schedule of Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 43,431	$ 56,415	$ 50,889	$ 67,660
Accretion	(3,240)	(4,642)	(11,249)	(14,016)
Reclassification from nonaccretable difference	7,736	227	8,367	3,175
Disposals	(1,038)	(185)	(1,118)	(5,004)
Balance at end of period	$ 46,889	$ 51,815	$ 46,889	$ 51,815

Accounting for Certain Loans 62

Accounting for Certain Loans Acquired with Deteriorated Credit Quality - Schedule of Impaired Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	$ 212,885	$ 267,151
Recorded Investment	[2]	115,801	162,139
Carrying Value	[3]	113,036	158,685
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	98,677	115,863
Recorded Investment	[2]	86,569	102,987
Carrying Value	[3]	85,059	100,203
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	100,075	130,825
Recorded Investment	[2]	23,402	49,202
Carrying Value	[3]	22,147	48,557
Commercial non real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	11,092	16,697
Recorded Investment	[2]	2,889	6,361
Carrying Value	[3]	2,889	6,361
Agriculture
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	1,567	1,747
Recorded Investment	[2]	1,567	1,746
Carrying Value	[3]	1,567	1,746
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Balance	[1]	1,474	2,019
Recorded Investment	[2]	1,374	1,843
Carrying Value	[3]	$ 1,374	$ 1,818
[1]	Represents the legal balance of loans acquired with deteriorated credit quality
[2]	Represents the book balance of loans acquired with deteriorated credit quality
[3]	Represents the book balance of loans acquired with deteriorated credit quality net of the related allowance for loan losses.

FDIC Indemnification Asset - Sc

FDIC Indemnification Asset - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
FDIC Indemnification Asset [Roll Forward]
Balance at beginning of year	$ 19,895	$ 37,775	$ 26,678	$ 45,690
Amortization	(1,754)	(3,256)	(6,347)	(11,203)
Changes in expected reimbursements from FDIC for changes in expected credit losses	15	958	(175)	550
Changes in reimbursable expenses	(1,148)	(280)	(1,511)	2,525
Payments to/(from) the FDIC	(29)	(2,965)	(1,666)	(5,330)
Balance at end of year	$ 16,979	$ 32,232	$ 16,979	$ 32,232

Derivative Financial Instrume64

Derivative Financial Instruments - Notional Amounts and Estimated Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Positive Fair Value	$ 2,867	$ 6,213
Negative Fair Value	(27,292)	(19,286)
Assets | Not Designated as Hedging Instruments | Mortgage loan commitments
Derivative [Line Items]
Notional Amount	33,626	22,563
Positive Fair Value	1	19
Negative Fair Value	0	0
Liabilities | Not Designated as Hedging Instruments | Interest rate swaps
Derivative [Line Items]
Notional Amount	1,065,703	986,440
Positive Fair Value	2,867	6,213
Negative Fair Value	(27,292)	(19,286)
Liabilities | Not Designated as Hedging Instruments | Mortgage loan forward sale contracts
Derivative [Line Items]
Notional Amount	38,882	28,459
Positive Fair Value	0	0
Negative Fair Value	$ (1)	$ (19)

Derivative Financial Instrume65

Derivative Financial Instruments - Effect on the Consolidated Statement of Comprehensive Income (Details) - Noninterest income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest rate swaps
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 18,946	$ (17,797)	$ (27,357)	$ (25,396)
Mortgage loan commitments
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	(26)	6	1	40
Mortgage loan forward sale contracts
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 26	$ (6)	$ (1)	$ (40)

Derivative Financial Instrume66

Derivative Financial Instruments - Offsetting Liabilities and Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative financial assets, gross amount	$ 2,867	$ 6,213
Derivative financial liabilities, gross amount	(27,292)	(19,286)
Derivative financial assets (liabilities), gross amount	(24,425)	(13,073)
Derivative financial assets, amount offset	(2,867)	(6,213)
Derivative financial liabilities, amount offset	2,867	6,213
Derivative financial assets (liabilities), Net, amount offset	0	0
Derivative financial assets, net amount presented in Consolidated Balance Sheets	0	0
Derivative financial liabilities, net amount presented in Consolidated Balance Sheets	(24,425)	(13,073)
Derivative financial assets (liabilities), net amount presented in Consolidated Balance Sheets	(24,425)	(13,073)
Derivative financial assets, Held/pledged financial instruments	0	0
Derivative financial liabilities, Held/pledged financial instruments	24,425	13,073
Derivative liabilities (assets), Net, Held/pledged financial instruments	24,425	13,073
Derivative financial asset, net amount	0	0
Derivative financial liabilities, net amount	0	0
Derivative financial assets (liabilities), net, amount offset against collateral	$ 0	$ 0

The Fair Value Option - (Narrat

The Fair Value Option - (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Eligible item for the fair value option			$ 18.9		$ 7.1
Long-term loans and written loan commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Eligible item for the fair value option	$ 0	$ 0.7	0.5	$ 1.4
Fair value, option, aggregate differences, long-term debt instruments	$ 1,044.7		$ 1,044.7		$ 978.3

The Fair Value Option - Schedul

The Fair Value Option - Schedule of Fair Value Option (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net increase (decrease) in fair value of loans at fair value	$ (24,394)	$ 13,886	$ 7,914	$ 13,506
Long-term loans and written loan commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net increase (decrease) in fair value of loans at fair value	(24,394)	13,886	7,914	13,506
Noninterest Income (Loss) | Long-term loans and written loan commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net increase (decrease) in fair value of loans at fair value	$ (24,394)	$ 13,886	$ 7,914	$ 13,506

Core Deposits and Other Intan69

Core Deposits and Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$ 1.8	$ 4.1	$ 6.4	$ 13.4

Core Deposits and Other Intan70

Core Deposits and Other Intangibles - Intangible Assets Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 117,232	$ 117,232
Accumulated amortization	(109,405)	(103,003)
Core deposits and other intangibles	7,827	14,229
Core Deposit Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	92,679	92,679
Accumulated amortization	(91,980)	(87,423)
Core deposits and other intangibles	699	5,256
Brand Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	8,464	8,464
Accumulated amortization	(3,995)	(3,572)
Core deposits and other intangibles	4,469	4,892
Customer Relationships Intangible
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	16,089	16,089
Accumulated amortization	(13,430)	(12,008)
Core deposits and other intangibles	$ 2,659	$ 4,081

Core Deposits and Other Intan71

Core Deposits and Other Intangibles - Schedule of Future Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining in 2015	$ 709
2,016	2,822
2,017	1,097
2,018	564
2,019	564
2020 and thereafter	2,071
Core deposits and other intangibles	$ 7,827	$ 14,229

Securities Sold Under Agreeme72

Securities Sold Under Agreements to Repurchase - (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Offsetting Assets [Line Items]
Securities sold under agreements to repurchase	$ 170.5	$ 190.6
Securities sold under agreements to repurchase, fair value of collateral	$ 170.5	$ 188.6
Securities sold under agreements to repurchase, collateral, percentage of borrowed funds	102.00%
Minimum
Offsetting Assets [Line Items]
Securities sold under agreements to repurchase, maturity period	1 day
Maximum
Offsetting Assets [Line Items]
Securities sold under agreements to repurchase, maturity period	4 days

Securities Sold Under Agreeme73

Securities Sold Under Agreements to Repurchase - Maturity Schedule of Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 161,559	$ 161,687
US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	52,402	8,469
Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	109,157	153,218
Overnight and Continuous [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	158,611	157,980
Overnight and Continuous [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	52,402	8,469
Overnight and Continuous [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	106,209	149,511
Up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Up to 30 days [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Up to 30 days [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
30 to 90 Days [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
30 to 90 Days [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Greater than 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	2,948	3,707
Greater than 90 days [Member] | US Treasury and agency securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	0	0
Greater than 90 days [Member] | Mortgage-backed securities
Assets Sold under Agreements to Repurchase [Line Items]
Total repurchase agreements	$ 2,948	$ 3,707

FHLB Advances, Related Party 74

FHLB Advances, Related Party Notes Payable and Other Borrowings - (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Federal Home Loan Banks [Abstract]
Current borrowing capacity	$ 676.8
Loans pledged to the Federal Home Loan Bank	$ 2,232.8	$ 2,145.5

FHLB Advances, Related Party 75

FHLB Advances, Related Party Notes Payable and Other Borrowings - Schedule of Advances, Related Party Notes (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Debt Instrument [Line Items]
Related party notes payable	$ 41,295,000	$ 41,295,000
Notes payable	590,000,000	575,000,000
Other	520,000	94,000
Total FHLB advances and other borrowings	590,520,000	575,094,000
Total borrowings	631,815,000	616,389,000
Subordinated Capital Note to NAB New York due June 2018
Debt Instrument [Line Items]
Related party notes payable	35,795,000	35,795,000
Revolving line of credit to NAB
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	10,000,000	10,000,000
Related party notes payable	$ 5,500,000	$ 5,500,000
Subordinated debt | Subordinated Capital Note to NAB New York due June 2018 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	2.05%	2.05%
Subordinated debt | Notes Payable to FHLB collateralized by real estate loans, due 2023 | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Stated interest rate, percentage	0.21%	0.21%
Subordinated debt | Notes Payable to FHLB collateralized by real estate loans, due 2023 | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Stated interest rate, percentage	3.66%	3.66%
Line of credit | Revolving line of credit to NAB | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%	1.25%

FHLB Advances, Related Party 76

FHLB Advances, Related Party Notes Payable and Other Borrowings - Schedule of Due or Callable Notes (Details) - FHLB Advances and Related Party Notes Payable $ in Thousands	Jun. 30, 2015USD ($)
Debt Instrument [Line Items]
Remaining in 2015	$ 6,020
2,016	90,000
2,017	25,000
2,018	60,795
2,019	50,000
2020 and thereafter	400,000
Total	$ 631,815

Income Taxes - (Narrative) (Det

Income Taxes - (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Income Tax Contingency [Line Items]
Income tax payable	$ 0	$ 4,915
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Income taxes receivable	$ 1,400
National Americas Investment, Inc
Income Tax Contingency [Line Items]
Income tax payable		$ 4,900

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Federal	$ 5,600	$ 16,800	$ 29,611	$ 43,760
State	2,098	2,588	5,575	6,545
Current income tax expense (benefit)	7,698	19,388	35,186	50,305
Deferred tax (benefit) expense	7,173	(7,254)	3,107	(8,743)
Income tax expense	$ 14,871	$ 12,134	$ 38,293	$ 41,562

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income tax percentage	35.00%	35.00%	35.00%	35.00%
Computed “expected” tax expense (35%)	$ 15,296	$ 12,122	$ 39,741	$ 41,523
Tax exempt interest income	(1,573)	(1,263)	(4,789)	(3,539)
State income taxes, net of federal benefit	1,363	1,682	3,623	4,254
Other	(215)	(407)	(282)	(676)
Income tax expense	$ 14,871	$ 12,134	$ 38,293	$ 41,562

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Deferred tax assets:
Allowance for loan losses	$ 22,796	$ 19,683
Compensation	705	329
Net operating loss carryforward	81	119
Securities available for sale	1,046	3,758
Other real estate owned	8,880	13,721
Core deposit intangible and other fair value adjustments	11,351	10,573
Excess tax basis of loans acquired over carrying value	4,630	9,595
Other	6,023	6,272
Total deferred tax assets	55,512	64,050
Deferred tax liabilities:
Goodwill and other intangibles	(11,995)	(9,099)
Premises and equipment	(3,131)	(4,390)
Excess carrying value of FDIC indemnification asset and clawback liability	(326)	(4,280)
Other	(1,176)	(1,578)
Total deferred tax liabilities	(16,628)	(19,347)
Net deferred tax assets	$ 38,884	$ 44,703

Profit-Sharing Plan - (Details)

Profit-Sharing Plan - (Details) - Multiple employer 401(k) profit sharing plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, requisite service period			1 year
Defined contribution plan, minimum age requirement			21 years
Contributions by the Company	$ 1.1	$ 1.3	$ 2.9	$ 2.5

Stock-Based Compensation - (Nar

Stock-Based Compensation - (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, award vesting period			3 years
Share-based compensation expense	$ 0.3	$ 0	$ 1	$ 0
Tax benefit from compensation expense	0.1	$ 0	$ 0.4	$ 0
Target performance level			100.00%
Share-based compensation, compensation cost not yet recognized	$ 2.3		$ 2.3
Share-based compensation, compensation cost not yet recognized, recognition period			2 years 3 months
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-established target levels			0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target performance level			150.00%
Pre-established target levels			150.00%
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares to be issued (approximately)			320,300

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Restricted and Performance Stock (Details) - Jun. 30, 2015 - $ / shares	Total
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, October 1, 2014 (shares)	0
Granted (shares)	81,419
Vested and issued (shares)	0
Forfeited (shares)	(556)
Canceled (shares)	0
Shares, June 30, 2015 (shares)	80,863
Vested, but not issuable (shares)	12,221
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Shares, October 1, 2014 USD per share)	$ 0
Granted (in USD per share)	18.18
Vested and issued (in USD per share)	0
Forfeited (in USD per share)	18
Canceled (in USD per share)	0
Shares, June 30, 2015 (in USD per share)	18.18
Vested, but not issuable (in USD per share)	$ 18
Performance shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, October 1, 2014 (shares)	0
Granted (shares)	221,294
Vested and issued (shares)	0
Forfeited (shares)	(7,761)
Canceled (shares)	0
Shares, June 30, 2015 (shares)	213,533
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Shares, October 1, 2014 USD per share)	$ 0
Granted (in USD per share)	18
Vested and issued (in USD per share)	0
Forfeited (in USD per share)	18
Canceled (in USD per share)	0
Shares, June 30, 2015 (in USD per share)	$ 18

Fair Value of Financial Instr84

Fair Value of Financial Instruments - (Narrative) (Details)	9 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Derivative, remaining maturity (or less)	180 days

Fair Value of Financial Instr85

Fair Value of Financial Instruments - Schedule of Fair Value Measurements of Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 1,410,475	$ 1,341,242
Derivatives-liabilities	24,426	13,092
Fair value loans and written loan commitments	1,063,665	985,411
Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,410,475	1,341,242
Derivatives-assets	1	19
Derivatives-liabilities	24,426	13,092
Fair value loans and written loan commitments	1,063,665	985,411
Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	377,507	222,725
Derivatives-assets	0	0
Derivatives-liabilities	0	0
Fair value loans and written loan commitments	0	0
Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,031,134	1,116,488
Derivatives-assets	1	19
Derivatives-liabilities	24,426	13,092
Fair value loans and written loan commitments	1,063,665	985,411
Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,834	2,029
Derivatives-assets	0	0
Derivatives-liabilities	0	0
Fair value loans and written loan commitments	0	0
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	303,132	222,725
U.S. Treasury securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	303,132	222,725
U.S. Treasury securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	303,132	222,725
U.S. Treasury securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Treasury securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	74,375	0
U.S. Agency securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	74,375	0
U.S. Agency securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	74,375	0
U.S. Agency securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
U.S. Agency securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,025,026	1,103,415
Mortgage-backed securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,025,026	1,103,415
Mortgage-backed securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Mortgage-backed securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,025,026	1,103,415
Mortgage-backed securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
States and political subdivision securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,864	2,189
States and political subdivision securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,864	2,189
States and political subdivision securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
States and political subdivision securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	30	160
States and political subdivision securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,834	2,029
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,030	11,873
Corporate debt securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,030	11,873
Corporate debt securities | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Corporate debt securities | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	5,030	11,873
Corporate debt securities | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Other | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,048	1,040
Other | Fair value, measurements, recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Other | Fair value, measurements, recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,048	1,040
Other | Fair value, measurements, recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 0	$ 0

Fair Value of Financial Instr86

Fair Value of Financial Instruments - Schedule of Other Available-for-Sale (Details) - Available-for-sale securities - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 1,958	$ 2,243	$ 2,029	$ 2,243
Principal paydown	(124)	0	(195)	0
Ending Balance	$ 1,834	$ 2,243	$ 1,834	$ 2,243

Fair Value of Financial Instr87

Fair Value of Financial Instruments - Mortgage Loans Held for Sale (Details) - Fair value, measurements, nonrecurring - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	$ 13,051	$ 36,879
Impaired loans	166,841	111,265
Loans held for sale, at lower of cost or fair value	9,173	10,381
Level 1
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	0	0
Impaired loans	0	0
Loans held for sale, at lower of cost or fair value	0	0
Level 2
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	0	0
Impaired loans	0	0
Loans held for sale, at lower of cost or fair value	9,173	10,381
Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Other real estate owned	13,051	36,879
Impaired loans	166,841	111,265
Loans held for sale, at lower of cost or fair value	$ 0	$ 0

Fair Value of Financial Instr88

Fair Value of Financial Instruments - Level 3 Schedule (Details) - Fair value, measurements, nonrecurring - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other real estate owned	$ 13,051	$ 36,879
Impaired loans	166,841	111,265
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Other real estate owned	13,051	36,879
Impaired loans	$ 166,841	$ 111,265

Fair Value of Financial Instr89

Fair Value of Financial Instruments - Schedule of Balance Sheet Grouping Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Level 1 | Carrying Amount
Assets
Cash and due from banks	$ 187,171	$ 256,639
Level 1 | Fair Value
Assets
Cash and due from banks	187,171	256,639
Level 2 | Carrying Amount
Assets
Accrued interest receivable	39,528	42,609
Federal Home Loan Bank stock	36,287	35,922
Liabilities
FHLB advances, related party notes payable, and other borrowings	631,815	616,389
Securities sold under repurchase agreements	161,559	161,687
Accrued interest payable	4,211	5,273
Subordinated debentures	56,083	56,083
Level 2 | Fair Value
Assets
Accrued interest receivable	39,528	42,609
Federal Home Loan Bank stock	36,287	35,922
Liabilities
FHLB advances, related party notes payable, and other borrowings	624,431	604,615
Securities sold under repurchase agreements	161,559	161,687
Accrued interest payable	4,211	5,273
Subordinated debentures	56,071	56,084
Level 3 | Carrying Amount
Assets
Loans, net excluding fair valued loans and loans held for sale	6,116,471	5,744,157
Liabilities
Deposits	7,357,688	7,052,180
Level 3 | Fair Value
Assets
Loans, net excluding fair valued loans and loans held for sale	6,099,234	5,734,274
Liabilities
Deposits	$ 7,384,060	$ 7,057,591

Earnings per Share - Schedule o

Earnings per Share - Schedule of EPS, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 28,832	$ 22,502	$ 75,253	$ 77,077
Weighted average common shares outstanding	57,898,335	57,886,114	57,897,484	57,886,114
Dilutive effect of stock based compensation (in shares)	60,867	0	31,704	0
Weighted average common shares outstanding for diluted earnings per share calculation	57,959,202	57,886,114	57,929,188	57,886,114
Basic earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Diluted earnings per share (in dollars per share)	$ 0.50	$ 0.39	$ 1.30	$ 1.33
Performance shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share			60,543	0
Stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from computation of earnings per share			1,244	0

Uncategorized Items - gwb-20150

Label	Element	Value
Gain (Loss) on Sales of Loans, Net	us-gaap_GainLossOnSalesOfLoansNet	$ 1,322
Gain (Loss) on Sales of Loans, Net	us-gaap_GainLossOnSalesOfLoansNet	1,903
Net (gain) loss from sale of repossessed property and other assets	gwb_Netgainlossfromsaleofrepossessedpropertyandotherassets	(1,452)
Net (gain) loss from sale of repossessed property and other assets	gwb_Netgainlossfromsaleofrepossessedpropertyandotherassets	$ (1,564)