Allowance for Loan and Lease Losses and Reserve for Unfunded Commitments - Summary of Contractual Delinquency Information (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	$ 4,454,620	$ 4,340,535	$ 3,860,259
Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	1,431,668	1,421,670	1,294,959
Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	545,279	572,271	693,997
Construction, Land Development, and Other Land
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	240,324	230,733	277,776
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	1,364,396	1,368,900	1,414,559
Paycheck Protection Program
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	617,006	517,815
Installment and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	1,616	2,005	5,721
Lease Financing Receivables
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans and leases	254,331	227,141	$ 173,247
Acquired Non-Impaired and Originated Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	64,827	55,716
Non-accrual	37,084	41,103
Current	4,208,426	4,083,002
Total loans and leases	4,273,253	4,138,718
Acquired Non-Impaired and Originated Loans | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	25,634	8,753
Acquired Non-Impaired and Originated Loans | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,109	5,860
Acquired Non-Impaired and Originated Loans | Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	33,827	21,707
Non-accrual	16,198	15,969
Current	1,301,782	1,291,479
Total loans and leases	1,335,609	1,313,186
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	17,629	1,544
Acquired Non-Impaired and Originated Loans | Commercial Real Estate | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,194
Acquired Non-Impaired and Originated Loans | Residential Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	4,388	3,615
Non-accrual	2,078	1,929
Current	466,608	489,816
Total loans and leases	470,996	493,431
Acquired Non-Impaired and Originated Loans | Residential Real Estate | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,310	1,686
Acquired Non-Impaired and Originated Loans | Residential Real Estate | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,000
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,760
Current	236,572	226,620
Total loans and leases	238,332	226,620
Acquired Non-Impaired and Originated Loans | Construction, Land Development, and Other Land | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,760
Acquired Non-Impaired and Originated Loans | Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	21,229	27,747
Non-accrual	17,565	21,936
Current	1,334,325	1,330,975
Total loans and leases	1,355,554	1,358,722
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	3,076	4,521
Acquired Non-Impaired and Originated Loans | Commercial and Industrial | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	588	1,290
Acquired Non-Impaired and Originated Loans | Paycheck Protection Program
Financing Receivable Recorded Investment Past Due [Line Items]
Current	617,006	517,815
Total loans and leases	617,006	517,815
Acquired Non-Impaired and Originated Loans | Installment and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		7
Non-accrual		1
Current	1,425	1,796
Total loans and leases	1,425	1,803
Acquired Non-Impaired and Originated Loans | Installment and Other | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	3,623	2,640
Non-accrual	1,243	1,268
Current	250,708	224,501
Total loans and leases	254,331	227,141
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 30-59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,859	996
Acquired Non-Impaired and Originated Loans | Lease Financing Receivables | 60-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 521	$ 376