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Loans and Allowance for Credit Losses - Nonaccrual and Past Due Greater than 90 Days (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	$ 53,105	$ 73,836
Financing Receivable, Nonaccrual, No Allowance	23,750	36,537
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,810	2,362
Commercial real estate - Owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	2,503	10,231
Financing Receivable, Nonaccrual, No Allowance	0	5,985
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Commercial real estate - Non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	2,711	5,219
Financing Receivable, Nonaccrual, No Allowance	0	1,522
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Consumer real estate – mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	17,474	22,191
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	273
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	947	1,953
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	135	0
Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	29,443	34,238
Financing Receivable, Nonaccrual, No Allowance	23,750	29,030
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,390	1,785
Consumer and other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	27	4
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, 90 Days or More Past Due, Still Accruing	$ 285	$ 304

X

- Definition

Amount of financing receivable on nonaccrual status with no allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

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+ References

No definition available.

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- Definition

Amount of financing receivable 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

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-Publisher FASB
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