Allowance for Credit Losses - Schedule of Loan Portfolio, Excluding PCI Loans and Related Allowance (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Recorded Investment
Individually Evaluated	$ 37,637	$ 39,863
Collectively Evaluated	6,413,580	5,885,166
Total	6,451,217	5,925,029
Associated Allowance
Individually Evaluated	4,560	4,754
Collectively Evaluated	85,278	78,561
Total	89,838	83,315	$ 86,643	$ 92,733
Construction and land development
Recorded Investment
Individually Evaluated	248	271
Collectively Evaluated	259,173	230,553
Total	259,421	230,824
Associated Allowance
Individually Evaluated	89	92
Collectively Evaluated	2,179	2,659
Total	2,268	2,751	4,428	4,920
Commercial real estate - owner-occupied
Recorded Investment
Individually Evaluated	4,996	5,131
Collectively Evaluated	1,279,519	1,192,643
Total	1,284,515	1,197,774
Associated Allowance
Individually Evaluated	380	419
Collectively Evaluated	8,914	8,160
Total	9,294	8,579	9,792	9,868
Commercial real estate - non owner-occupied
Recorded Investment
Individually Evaluated	5,527	5,905
Collectively Evaluated	1,960,623	1,730,534
Total	1,966,150	1,736,439
Associated Allowance
Individually Evaluated	787	27
Collectively Evaluated	43,135	36,590
Total	43,922	36,617	36,229	38,266
Residential real estate
Recorded Investment
Individually Evaluated	13,154	16,345
Collectively Evaluated	1,586,491	1,409,009
Total	1,599,645	1,425,354
Associated Allowance
Individually Evaluated	312	646
Collectively Evaluated	13,763	12,165
Total	14,075	12,811	14,353	17,500
Commercial and financial
Recorded Investment
Individually Evaluated	13,172	11,470
Collectively Evaluated	1,119,334	1,057,886
Total	1,132,506	1,069,356
Associated Allowance
Individually Evaluated	2,511	2,885
Collectively Evaluated	15,216	16,859
Total	17,727	19,744	18,916	18,690
Consumer
Recorded Investment
Individually Evaluated	540	741
Collectively Evaluated	169,184	173,434
Total	169,724	174,175
Associated Allowance
Individually Evaluated	481	685
Collectively Evaluated	2,071	2,128
Total	2,552	2,813	2,925	3,489
Paycheck Protection Program
Recorded Investment
Individually Evaluated	0	0
Collectively Evaluated	39,256	91,107
Total	39,256	91,107
Associated Allowance
Individually Evaluated	0	0
Collectively Evaluated	0	0
Total	$ 0	$ 0	$ 0	$ 0

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

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-Topic 310
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