Quarterly report pursuant to Section 13 or 15(d)

Allowance for Loan and Lease Losses - Summary of Aging Analysis of Recorded Investment for Delinquent Loans by Portfolio and Segment (Details)

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Allowance for Loan and Lease Losses - Summary of Aging Analysis of Recorded Investment for Delinquent Loans by Portfolio and Segment (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current $ 2,441,610 $ 1,755,867
Recorded investment, Non-accrual 8,730 6,459
Recorded investment, Total 2,452,353 1,767,182
Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 1,010 3,759
Recorded investment, Non-accrual 730 308
Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 1,003 1,095
Recorded investment, Non-accrual 370 1,200
Financing Receivables, Past Due Greater Than 90 Days or More and Still Accruing    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due   2
Recorded investment, Non-accrual 2,100 2,600
Commercial and Industrial Loans    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 685,416 278,922
Recorded investment, Non-accrual 4,359 2,579
Recorded investment, Total 690,009 282,949
Commercial and Industrial Loans | Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 195 760
Commercial and Industrial Loans | Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 39 688
Real Estate | 1-4 Single Family Residential Loans    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 369,983 372,828
Recorded investment, Non-accrual 1,941 1,897
Recorded investment, Total 373,220 375,743
Real Estate | 1-4 Single Family Residential Loans | Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 733 1,018
Real Estate | 1-4 Single Family Residential Loans | Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 563  
Real Estate | Construction, Land and Development    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 402,259 258,497
Recorded investment, Non-accrual 217 216
Recorded investment, Total 402,476 259,384
Real Estate | Construction, Land and Development | Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due   671
Real Estate | Commercial Real Estate Loans (Including Multifamily)    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 903,602 750,432
Recorded investment, Non-accrual 2,151 1,693
Recorded investment, Total 906,134 753,812
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due   1,283
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 381 404
Consumer Loans and Leases    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 12,813 22,663
Recorded investment, Non-accrual 62 74
Recorded investment, Total 12,977 22,769
Consumer Loans and Leases | Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 82 27
Consumer Loans and Leases | Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 20 3
Consumer Loans and Leases | Financing Receivables, Past Due Greater Than 90 Days or More and Still Accruing    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due   2
Municipal and Other Loans    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 67,537 72,525
Recorded investment, Total $ 67,537 $ 72,525