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Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Recorded Investment in Loans Held-for-Investment and Related Allowance for Loan Losses by Loan Type (Detail) $ in Thousands | Sep. 30, 2019 USD ($)
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Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | $ 9,780
Recorded Investment in Loans, Collectively Evaluated for Impairment | 7,488,537
Allowance for Loan Losses, Individually Evaluated for Impairment | 540
Allowance for Loan Losses, Collectively Evaluated for Impairment | 68,132
Commercial and Industrial [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 1,638
Recorded Investment in Loans, Collectively Evaluated for Impairment | 920,040
Allowance for Loan Losses, Individually Evaluated for Impairment | 254
Allowance for Loan Losses, Collectively Evaluated for Impairment | 7,984
Small Business Administration [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 3,248
Recorded Investment in Loans, Collectively Evaluated for Impairment | 316,323
Allowance for Loan Losses, Individually Evaluated for Impairment | 286
Allowance for Loan Losses, Collectively Evaluated for Impairment | 1,180
Commercial Real Estate [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 1,500
Recorded Investment in Loans, Collectively Evaluated for Impairment | 5,374,168
Allowance for Loan Losses, Individually Evaluated for Impairment | 0
Allowance for Loan Losses, Collectively Evaluated for Impairment | 48,911
Construction [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 0
Recorded Investment in Loans, Collectively Evaluated for Impairment | 119,931
Allowance for Loan Losses, Individually Evaluated for Impairment | 0
Allowance for Loan Losses, Collectively Evaluated for Impairment | 929
SFR Mortgage [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 3,009
Recorded Investment in Loans, Collectively Evaluated for Impairment | 275,635
Allowance for Loan Losses, Individually Evaluated for Impairment | 0
Allowance for Loan Losses, Collectively Evaluated for Impairment | 2,375
Dairy & Livestock and Agribusiness [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 0
Recorded Investment in Loans, Collectively Evaluated for Impairment | 311,229
Allowance for Loan Losses, Individually Evaluated for Impairment | 0
Allowance for Loan Losses, Collectively Evaluated for Impairment | 5,429
Municipal Lease Finance Receivables [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 0
Recorded Investment in Loans, Collectively Evaluated for Impairment | 54,468
Allowance for Loan Losses, Individually Evaluated for Impairment | 0
Allowance for Loan Losses, Collectively Evaluated for Impairment | 662
Consumer and Other Loans [Member] |
Financing Receivable, Allowance for Credit Losses [Line Items] |
Recorded Investment in Loans, Individually Evaluated for Impairment | 385
Recorded Investment in Loans, Collectively Evaluated for Impairment | 116,743
Allowance for Loan Losses, Individually Evaluated for Impairment | 0
Allowance for Loan Losses, Collectively Evaluated for Impairment | $ 662

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + 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 (h) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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