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
Mar. 31, 2021
Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current $ 2,417,162 $ 2,375,988
Recorded investment, Non-accrual 9,748 8,597
Recorded investment, Total 2,430,594 2,388,532
Financing Receivables, 30 to 59 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 3,162 3,622
Recorded investment, Non-accrual 842 930
Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due 386 325
Recorded investment, Non-accrual 116 545
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 136  
Recorded investment, Non-accrual 5,100 2,200
Commercial and Industrial Loans    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 693,533 567,491
Recorded investment, Non-accrual 5,989 4,929
Recorded investment, Total 699,896 574,986
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 374 2,295
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   271
Real Estate | 1-4 Single Family Residential Loans    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 346,360 362,505
Recorded investment, Non-accrual 839 1,507
Recorded investment, Total 348,908 364,139
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 1,459 99
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 250 28
Real Estate | Construction, Land and Development    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 344,204 415,135
Recorded investment, Non-accrual 217 217
Recorded investment, Total 344,557 415,488
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   136
Real Estate | Construction, Land and Development | 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 136  
Real Estate | Commercial Real Estate Loans (Including Multifamily)    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 960,352 953,823
Recorded investment, Non-accrual 2,578 1,836
Recorded investment, Total 964,342 956,743
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 1,276 1,084
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 136  
Consumer Loans and Leases    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 9,459 11,618
Recorded investment, Non-accrual 107 108
Recorded investment, Total 9,619 11,738
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 53 8
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   4
Municipal and Other Loans    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Current 63,254 65,416
Recorded investment, Non-accrual 18  
Recorded investment, Total $ 63,272 65,438
Municipal and Other Loans | Financing Receivables, 60 to 89 Days Past Due    
Financing Receivable Recorded Investment Past Due [Line Items]    
Recorded investment, Accruing, Past due   $ 22