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Covered Assets - Acquired Impaired and Non-impaired Loans (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Covered assets | $ 200,558 | $ 326,927
Gross covered loans | 213,203 | 362,248
Covered loans, allowance for losses | (2,244) | 0
Loans and Leases Receivable, Covered Loans | 210,959 | 362,248
Discount balance related to acquired loans | (34,483) | (66,301)
Covered loans, net | 176,476 | 295,947
Acquired loans classified as non-performing | 0 |
Commercial loans, term | 5 years |
Residential loans, term | 10 years |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] |  |
Accretion | 802 | 1,086
FDIC Indemnification Asset Movement Analysis [Roll Forward] |  |
Balance at beginning of period | 64,615 | 87,571
Additions | 1,795 | 18,101
Payments received | (2,502) | (13,421)
Amortization | (27,850) | (28,722)
Accretion | 802 | 1,086
Balance at end of period | 36,860 | 64,615
Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 45,467 | 56,888
Construction - speculative |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 181 | 440
Construction - custom |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 0 | 1,197
Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 6,953 | 22,763
Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 569 | 741
Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 8,823 | 25,785
Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 121,209 | 210,604
Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 14,386 | 24,365
HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 15,062 | 18,619
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 553 | 846
Credit-impaired acquired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 113,042 | 195,612
Covered loans, allowance for losses | (2,244) | 0
Loans and Leases Receivable, Covered Loans | 110,798 | 195,612
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] |  |
Accretable yield, balance at beginning of period | 37,236 | 16,928
Carrying amount, balance at beginning of period | 69,718 | 77,613
Accretable yield, additions | 7,300 | 0
Accretable yield, reclassifications from nonaccretable balance, net | 0 | 30,026
Carrying amount, reclassifications from nonaccretable balance, net | 0 | 0
Accretable yield, accretion | (11,945) | (9,718)
Accretion | 11,945 | 9,718
Carrying amount, transfers to real estate owned | (1,188) | (3,975)
Carrying amount, payments received, net | (22,704) | (23,503)
Accretable yield, balance at end of period | 32,591 | 37,236
Carrying amount, balance at end of period | 57,771 | 69,718
FDIC Indemnification Asset Movement Analysis [Roll Forward] |  |
Accretion | 11,945 | 9,718
Credit-impaired acquired loans | Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 22,400 | 28,428
Credit-impaired acquired loans | Construction - speculative |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 181 | 440
Credit-impaired acquired loans | Construction - custom |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 0 | 1,197
Credit-impaired acquired loans | Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 5,589 | 17,953
Credit-impaired acquired loans | Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 496 | 496
Credit-impaired acquired loans | Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 2,225 | 6,933
Credit-impaired acquired loans | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 69,873 | 121,105
Credit-impaired acquired loans | Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 8,894 | 14,949
Credit-impaired acquired loans | HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 3,285 | 3,869
Credit-impaired acquired loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 99 | 242
Acquired non-impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 100,161 | 166,636
Covered loans, allowance for losses | 0 | 0
Loans and Leases Receivable, Covered Loans | 100,161 | 166,636
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] |  |
Accretable yield, balance at beginning of period | 4,977 | 0
Carrying amount, balance at beginning of period | 245,373 | 0
Accretable yield, additions | 0 | 10,804
Accretable yield, reclassifications from nonaccretable balance, net | 0 | 0
Carrying amount, reclassifications from nonaccretable balance, net | 0 | 0
Accretable yield, accretion | (723) | (5,827)
Accretion | 723 | 5,827
Carrying amount, transfers to real estate owned | (4,710) | (7,755)
Carrying amount, payments received, net | (63,946) | (104,034)
Accretable yield, balance at end of period | 4,254 | 4,977
Carrying amount, balance at end of period | 177,440 | 245,373
FDIC Indemnification Asset Movement Analysis [Roll Forward] |  |
Accretion | 723 | 5,827
Acquired non-impaired loans | Single-family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 23,067 | 28,460
Loans and Leases Receivable, Covered Loans | 23,067 |
Acquired non-impaired loans | Construction - speculative |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 0 | 0
Loans and Leases Receivable, Covered Loans | 0 |
Acquired non-impaired loans | Construction - custom |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 0 | 0
Loans and Leases Receivable, Covered Loans | 0 |
Acquired non-impaired loans | Land - acquisition & development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 1,364 | 4,810
Loans and Leases Receivable, Covered Loans | 1,364 |
Acquired non-impaired loans | Land - consumer lot loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 73 | 245
Loans and Leases Receivable, Covered Loans | 73 |
Acquired non-impaired loans | Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 6,598 | 18,852
Loans and Leases Receivable, Covered Loans | 6,598 |
Acquired non-impaired loans | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 51,336 | 89,499
Loans and Leases Receivable, Covered Loans | 51,336 |
Acquired non-impaired loans | Commercial & industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 5,492 | 9,416
Loans and Leases Receivable, Covered Loans | 5,492 |
Acquired non-impaired loans | HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 11,777 | 14,750
Loans and Leases Receivable, Covered Loans | 11,777 |
Acquired non-impaired loans | Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Gross covered loans | 454 | 604
Loans and Leases Receivable, Covered Loans | 454 |
Acquired impaired loans |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] |  |
Accretable yield, balance at beginning of period | 78,277 | 50,902
Carrying amount, balance at beginning of period | 138,091 | 74,953
Accretable yield, additions | 0 | 43,299
Carrying amount, additions | 0 | 107,946
Accretable yield, reclassifications from nonaccretable balance, net | 10,186 | 17,850
Carrying amount, reclassifications from nonaccretable balance, net | (2,069) | 0
Accretable yield, accretion | (23,929) | (33,774)
Accretion | 23,929 | 33,774
Carrying amount, transfers to real estate owned | (8,943) | (11,196)
Carrying amount, payments received, net | (72,953) | (67,386)
Accretable yield, balance at end of period | 64,534 | 78,277
Carrying amount, balance at end of period | 78,055 | 138,091
FDIC Indemnification Asset Movement Analysis [Roll Forward] |  |
Accretion | 23,929 | 33,774
Acquired Non-impaired |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] |  |
Accretable yield, balance at beginning of period | 17,263 | 23,789
Carrying amount, balance at beginning of period | 157,856 | 213,423
Accretable yield, additions | 0 | 0
Carrying amount, additions | 0 | 0
Accretable yield, reclassifications from nonaccretable balance, net | 0 | 0
Carrying amount, reclassifications from nonaccretable balance, net | 0 | 0
Accretable yield, accretion | (7,004) | (6,526)
Accretion | 7,004 | 6,526
Carrying amount, transfers to real estate owned | 0 | 0
Carrying amount, payments received, net | (66,438) | (62,093)
Accretable yield, balance at end of period | 10,259 | 17,263
Carrying amount, balance at end of period | 98,422 | 157,856
FDIC Indemnification Asset Movement Analysis [Roll Forward] |  |
Accretion | $ 7,004 | $ 6,526

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- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of decrease from accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of additions to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of increase of reclassification from nonaccretable difference to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Disclosure of the unamortized amount of the discount on the note or receivable which is deducted from the face amount of the receivable or loan. The discount or premium is the difference between the present value and the face amount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 + Details
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- Definition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Transfers to Real Estate Owned + References No definition available. + Details
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- Definition Covered assets include loans and real estate held for sale participating in loss share with the FDIC. + References No definition available. + Details
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- Definition Covered Loans, Allowance for Losses + References No definition available. + Details
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