Allowance for Credit Losses - Schedule of Loan Portfolio, Excluding PCI Loans and Related Allowance (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Recorded Investment
Individually Evaluated	$ 39,863	$ 49,196
Collectively Evaluated	5,885,166	5,686,153
Total	5,925,029	5,735,349
Associated Allowance
Individually Evaluated	4,754	7,708
Collectively Evaluated	78,561	85,025
Total	83,315	92,733	$ 35,154	$ 32,423
Construction and land development
Recorded Investment
Individually Evaluated	271	276
Collectively Evaluated	230,553	244,832
Total	230,824	245,108
Associated Allowance
Individually Evaluated	92	13
Collectively Evaluated	2,659	4,907
Total	2,751	4,920	1,842	2,233
Commercial real estate - owner occupied
Recorded Investment
Individually Evaluated	5,131	10,243
Collectively Evaluated	1,192,643	1,131,067
Total	1,197,774	1,141,310
Associated Allowance
Individually Evaluated	419	402
Collectively Evaluated	8,160	9,466
Total	8,579	9,868	5,361
Commercial real estate - non-owner occupied
Recorded Investment
Individually Evaluated	5,905	8,083
Collectively Evaluated	1,730,534	1,387,771
Total	1,736,439	1,395,854
Associated Allowance
Individually Evaluated	27	1,640
Collectively Evaluated	36,590	36,626
Total	36,617	38,266	7,863
Residential real estate
Recorded Investment
Individually Evaluated	16,345	16,506
Collectively Evaluated	1,409,009	1,326,122
Total	1,425,354	1,342,628
Associated Allowance
Individually Evaluated	646	2,064
Collectively Evaluated	12,165	15,436
Total	12,811	17,500	7,667	7,775
Commercial and financial
Recorded Investment
Individually Evaluated	11,470	13,281
Collectively Evaluated	1,057,886	841,472
Total	1,069,356	854,753
Associated Allowance
Individually Evaluated	2,885	3,498
Collectively Evaluated	16,859	15,192
Total	19,744	18,690	9,716	8,585
Consumer
Recorded Investment
Individually Evaluated	741	807
Collectively Evaluated	173,434	187,928
Total	174,175	188,735
Associated Allowance
Individually Evaluated	685	91
Collectively Evaluated	2,128	3,398
Total	2,813	3,489	2,705	$ 2,718
Paycheck Protection Program
Recorded Investment
Individually Evaluated	0	0
Collectively Evaluated	91,107	566,961
Total	91,107	566,961
Associated Allowance
Individually Evaluated	0	0
Collectively Evaluated	0	0
Total	$ 0	$ 0	$ 0

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- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
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-Publisher FASB
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The balance of financing receivables that were individually evaluated for impairment.

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-Publisher FASB
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-Topic 310
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