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Loan and Lease Receivables - Schedule of Outstanding Loan and Lease Receivables (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019
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Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | $ 4,610,440 |  | $ 4,342,453 |  |  |
Net unamortized deferred fees and costs | (5,484) |  | (5,764) |  |  |
Initial direct costs | 4,272 |  | 3,846 |  |  |
Allowance for loan and lease losses | (60,598) | $ (61,719) | (66,347) | $ (61,258) | $ (51,300) | $ (31,936)
Net loans and leases | 4,548,630 |  | 4,274,188 |  |  |
Net minimum lease payments | 337,512 |  | 234,472 |  |  |
Unguaranteed residual values | 22,338 |  | 8,690 |  |  |
Unearned income | (25,366) |  | (19,867) |  |  |
Total lease financing receivables | 334,484 |  | 223,295 |  |  |
Initial direct costs | 4,272 |  | 3,846 |  |  |
Lease financial receivables before allowance for lease losses | 338,756 |  | 227,141 |  |  |
Commercial Real Estate |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | 1,615,875 |  | 1,416,731 |  |  |
Allowance for loan and lease losses | (20,372) | (19,541) | (19,584) | (18,984) | (14,110) | (7,965)
Residential Real Estate |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | 507,226 |  | 569,387 |  |  |
Allowance for loan and lease losses | (1,076) | (1,364) | (2,400) | (3,790) | (3,741) | (1,990)
Construction, Land Development, and Other Land |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | 340,428 |  | 231,602 |  |  |
Allowance for loan and lease losses | (558) | (619) | (1,352) | (1,872) | (1,491) | (610)
Commercial and Industrial |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | 1,535,412 |  | 1,372,452 |  |  |
Allowance for loan and lease losses | (35,990) | (38,284) | (41,183) | (34,540) | (30,108) | (19,377)
Paycheck Protection Program |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | 275,619 |  | 527,044 |  |  |
Allowance for loan and lease losses | 0 | 0 | 0 | 0 | 0 | 0
Installment and Other |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | 1,396 |  | 1,942 |  |  |
Allowance for loan and lease losses | (7) | (9) | (15) | (37) | (36) | (50)
Lease Financing Receivables |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Total loans and leases | 334,484 |  | 223,295 |  |  |
Allowance for loan and lease losses | $ (2,595) | $ (1,902) | $ (1,813) | $ (2,035) | $ (1,814) | $ (1,944)

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- Definition The net investment in direct financing leases as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121568338&loc=d3e45377-112738 + Details
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- Definition Remaining unamortized costs as of the balance sheet date that were essential to acquiring the lease, and that would not otherwise have been incurred without the lease agreement, including evaluating the lessee's credit condition, guarantees, and collateral and costs incurred negotiating, processing, and closing the lease agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=121585684&loc=d3e40246-112709 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121568338&loc=d3e45377-112738 + Details
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