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Allowance for Losses on Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | $ 127,576 | $ 121,922 | $ 123,073 | $ 113,494
Charge-offs | (3,674) | (411) | (4,865) | (1,908)
Recoveries | 3,764 | 1,663 | 9,408 | 13,672
Provision & Transfers | 1,000 | (945) | 1,050 | (3,029)
Ending Allowance | 128,666 | 122,229 | 128,666 | 122,229
Single-family residential |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 34,144 | 37,164 | 36,892 | 37,796
Charge-offs | (299) | (267) | (1,049) | (763)
Recoveries | 283 | 81 | 615 | 455
Provision & Transfers | 273 | 1,133 | (2,057) | 623
Ending Allowance | 34,401 | 38,111 | 34,401 | 38,111
Construction |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 27,389 | 25,061 | 24,556 | 19,838
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision & Transfers | 2,744 | (3,195) | 5,577 | 2,028
Ending Allowance | 30,133 | 21,866 | 30,133 | 21,866
Construction - custom |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 2,081 | 1,176 | 1,944 | 1,080
Charge-offs | 0 | 0 | (50) | (3)
Recoveries | 0 | 0 | 0 | 0
Provision & Transfers | (67) | 714 | 120 | 813
Ending Allowance | 2,014 | 1,890 | 2,014 | 1,890
Land - acquisition & development |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 7,622 | 6,669 | 6,829 | 6,023
Charge-offs | (12) | 0 | (12) | (63)
Recoveries | 2,699 | 863 | 7,278 | 9,092
Provision & Transfers | (2,609) | (315) | (6,395) | (7,835)
Ending Allowance | 7,700 | 7,217 | 7,700 | 7,217
Land - consumer lot loans |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 2,853 | 2,513 | 2,649 | 2,535
Charge-offs | (1) | 0 | (67) | (17)
Recoveries | 35 | 118 | 35 | 368
Provision & Transfers | 20 | (83) | 290 | (338)
Ending Allowance | 2,907 | 2,548 | 2,907 | 2,548
Multi-family |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 7,982 | 7,929 | 7,862 | 6,925
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision & Transfers | 109 | (17) | 229 | 987
Ending Allowance | 8,091 | 7,912 | 8,091 | 7,912
Commercial real estate |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 11,588 | 10,772 | 11,818 | 8,588
Charge-offs | 0 | 0 | (36) | (11)
Recoveries | 91 | 164 | 92 | 1,684
Provision & Transfers | (100) | 411 | (295) | 1,086
Ending Allowance | 11,579 | 11,347 | 11,579 | 11,347
Commercial & industrial |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 29,330 | 28,365 | 28,524 | 28,008
Charge-offs | (3,317) | 0 | (3,433) | (163)
Recoveries | 433 | 154 | 603 | 1,096
Provision & Transfers | 1,069 | 653 | 1,821 | 231
Ending Allowance | 27,515 | 29,172 | 27,515 | 29,172
HELOC |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 802 | 826 | 855 | 813
Charge-offs | 0 | 0 | (1) | (90)
Recoveries | 0 | 1 | 0 | 2
Provision & Transfers | 9 | 50 | (43) | 152
Ending Allowance | 811 | 877 | 811 | 877
Consumer |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 3,785 | 1,447 | 1,144 | 1,888
Charge-offs | (45) | (144) | (217) | (798)
Recoveries | 223 | 282 | 785 | 975
Provision & Transfers | (448) | (296) | 1,803 | (776)
Ending Allowance | $ 3,515 | $ 1,289 | $ 3,515 | $ 1,289

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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