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Loans and Lease Receivables - Summary of Balances for Each Respective Loan and Lease Category (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 3,785,661	$ 3,501,626	$ 2,277,492
Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	2,835,652	2,237,798
Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	258,668	277,542
Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	691,341	986,286
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,276,542	1,261,607	891,693
Commercial Real Estate | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	792,263	652,234
Commercial Real Estate | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	135,914	146,808
Commercial Real Estate | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	348,365	462,565
Residential Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	711,822	704,902	577,218
Residential Real Estate | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	483,072	466,309
Residential Real Estate | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	100,223	113,934
Residential Real Estate | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	128,527	124,659
Construction, Land Development, and Other Land
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	278,657	185,349	105,429
Construction, Land Development, and Other Land | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	235,794	144,128
Construction, Land Development, and Other Land | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	5,373	3,779
Construction, Land Development, and Other Land | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	37,490	37,442
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,331,565	1,144,797	521,238
Commercial and Industrial | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	1,160,996	803,508
Commercial and Industrial | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	16,909	12,617
Commercial and Industrial | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	153,660	328,672
Installment and Other
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	6,565	13,718	4,228
Installment and Other | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	5,372	11,718
Installment and Other | Acquired Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	249	404
Installment and Other | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	944	1,596
Lease Financing Receivables
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	180,510	191,253	$ 177,686
Lease Financing Receivables | Originated
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	158,155	159,901
Lease Financing Receivables | Acquired Non-Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans and leases	$ 22,355	$ 31,352

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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=118952595&loc=d3e4428-111522

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