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Loan and Lease Receivables - Schedule of Unpaid Principal Balance and Carrying Value for Acquired Non-impaired Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	$ 4,609,228	$ 4,340,535	$ 4,374,517
Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	358,792	481,612
Loans and leases	351,152	470,258
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	1,618,378	1,421,670	1,347,855
Commercial Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	240,271	302,091
Loans and leases	235,103	295,599
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	507,754	572,271	633,396
Residential Real Estate | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	58,858	80,104
Loans and leases	58,283	79,211
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	338,412	230,733	239,034
Construction, Land Development, and Other Land | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	271	278
Loans and leases	206	212
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	1,536,405	1,368,900	1,328,809
Commercial and Industrial | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	51,468	84,608
Loans and leases	49,678	82,195
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	1,442	2,005	3,143
Installment and Other | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	286	553
Loans and leases	275	536
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Loans and leases	338,756	227,141	$ 200,089
Lease Financing Receivables | Acquired Non-impaired Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Unpaid Principal Balance	7,638	13,978
Loans and leases	$ 7,607	$ 12,505

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- Definition

Loans and leases receivable unpaid principal balance.

+ References

No definition available.

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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