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Allowance for Losses on Loans - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | $ 118,456 | $ 107,901 | $ 113,494 | $ 106,829
Charge-offs | (1,093) | (1,938) | (1,497) | (4,059)
Recoveries | 6,309 | 5,456 | 12,009 | 8,649
Provision & Transfers | (1,750) | (1,500) | (2,084) | (1,500)
Ending Allowance | 121,922 | 109,919 | 121,922 | 109,919
Single-family residential |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 38,206 | 47,756 | 37,796 | 47,347
Charge-offs | (381) | (1,026) | (496) | (2,165)
Recoveries | 223 | 111 | 374 | 2,577
Provision & Transfers | (884) | (5,013) | (510) | (5,931)
Ending Allowance | 37,164 | 41,828 | 37,164 | 41,828
Construction |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 21,934 | 7,014 | 19,838 | 6,680
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | (5) | 0 | 150
Provision & Transfers | 3,127 | 8,717 | 5,223 | 8,896
Ending Allowance | 25,061 | 15,726 | 25,061 | 15,726
Construction - custom |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 1,110 | 1,062 | 1,080 | 990
Charge-offs | (3) | 0 | (3) | (60)
Recoveries | 0 | 0 | 0 | 0
Provision & Transfers | 69 | (40) | 99 | 92
Ending Allowance | 1,176 | 1,022 | 1,176 | 1,022
Land - acquisition & development |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 6,665 | 6,778 | 6,023 | 5,781
Charge-offs | (43) | 0 | (63) | 0
Recoveries | 4,211 | 3,371 | 8,229 | 3,406
Provision & Transfers | (4,164) | (2,897) | (7,520) | (1,935)
Ending Allowance | 6,669 | 7,252 | 6,669 | 7,252
Land - consumer lot loans |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 2,501 | 3,001 | 2,535 | 2,946
Charge-offs | 0 | (268) | (17) | (676)
Recoveries | 180 | 0 | 250 | 0
Provision & Transfers | (168) | (267) | (255) | 196
Ending Allowance | 2,513 | 2,466 | 2,513 | 2,466
Multi-family |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 7,629 | 5,047 | 6,925 | 5,304
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision & Transfers | 300 | 1,737 | 1,004 | 1,480
Ending Allowance | 7,929 | 6,784 | 7,929 | 6,784
Commercial real estate |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 10,168 | 10,344 | 8,588 | 8,960
Charge-offs | 0 | (9) | (11) | (32)
Recoveries | 1,164 | 992 | 1,520 | 1,115
Provision & Transfers | (560) | (3,544) | 675 | (2,260)
Ending Allowance | 10,772 | 7,783 | 10,772 | 7,783
Commercial & industrial |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 27,736 | 24,096 | 28,008 | 24,980
Charge-offs | (105) | (331) | (163) | (579)
Recoveries | 217 | 590 | 942 | 591
Provision & Transfers | 517 | (531) | (422) | (1,168)
Ending Allowance | 28,365 | 23,824 | 28,365 | 23,824
HELOC |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 832 | 820 | 813 | 902
Charge-offs | (53) | (26) | (90) | (27)
Recoveries | 0 | 0 | 1 | 21
Provision & Transfers | 47 | 34 | 102 | (68)
Ending Allowance | 826 | 828 | 826 | 828
Consumer |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Beginning Allowance | 1,675 | 1,983 | 1,888 | 2,939
Charge-offs | (508) | (278) | (654) | (520)
Recoveries | 314 | 397 | 693 | 789
Provision & Transfers | (34) | 304 | (480) | (802)
Ending Allowance | $ 1,447 | $ 2,406 | $ 1,447 | $ 2,406

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=66008989&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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