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Loans and Allowance for Loan Losses, Impaired Financing Receivable (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 58,144,000	$ 83,146,000	$ 58,979,000
Unpaid principal balance	64,556,000	83,337,000	59,354,000
Related allowance	3,281,000	3,964,000	2,198,000
Average balance of impaired loans	76,919,000	75,257,000	40,830,000
Interest income recognized	176,000	469,000	95,000
Impaired loans with an allowance
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	35,758,000	44,794,000	24,921,000
Unpaid principal balance	40,305,000	44,914,000	25,114,000
Related allowance	3,281,000	3,964,000	2,198,000
Average balance of impaired loans	44,458,000	34,615,000	17,191,000
Interest income recognized	0	0	0
Impaired loans with an allowance | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	9,998,000	14,114,000	1,850,000
Unpaid principal balance	10,983,000	14,124,000	1,863,000
Related allowance	1,235,000	724,000	95,000
Average balance of impaired loans	13,750,000	10,260,000	650,000
Interest income recognized	0	0	0
Impaired loans with an allowance | Consumer Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	20,996,000	19,864,000	8,028,000
Unpaid principal balance	23,105,000	19,991,000	8,079,000
Related allowance	1,293,000	1,443,000	410,000
Average balance of impaired loans	20,909,000	13,154,000	4,990,000
Interest income recognized	0	0	0
Impaired loans with an allowance | Construction and Land Development
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	542,000	581,000	2,522,000
Unpaid principal balance	654,000	579,000	2,528,000
Related allowance	33,000	28,000	66,000
Average balance of impaired loans	578,000	1,157,000	567,000
Interest income recognized	0	0	0
Impaired loans with an allowance | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	4,074,000	9,252,000	12,521,000
Unpaid principal balance	5,381,000	9,215,000	12,644,000
Related allowance	711,000	1,441,000	1,627,000
Average balance of impaired loans	8,871,000	9,326,000	10,559,000
Interest income recognized	0	0	0
Impaired loans with an allowance | Consumer and Other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	148,000	983,000	0
Unpaid principal balance	182,000	1,005,000	0
Related allowance	9,000	328,000	0
Average balance of impaired loans	350,000	718,000	425,000
Interest income recognized	0	0	0
Impaired loans without an allowance
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	22,386,000	38,352,000	34,058,000
Unpaid principal balance	24,251,000	38,423,000	34,240,000
Related allowance	0	0	0
Average balance of impaired loans	32,461,000	40,642,000	23,639,000
Interest income recognized	176,000	469,000	95,000
Impaired loans without an allowance | Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	8,124,000	14,724,000	16,364,000
Unpaid principal balance	8,891,000	14,739,000	16,514,000
Related allowance	0	0	0
Average balance of impaired loans	11,642,000	17,906,000	6,983,000
Interest income recognized	176,000	469,000	0
Impaired loans without an allowance | Consumer Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	4,022,000	7,247,000	4,144,000
Unpaid principal balance	4,021,000	7,271,000	4,174,000
Related allowance	0	0	0
Average balance of impaired loans	7,509,000	5,477,000	5,727,000
Interest income recognized	0	0	0
Impaired loans without an allowance | Construction and Land Development
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	19,000	1,786,000	2,645,000
Unpaid principal balance	17,000	1,786,000	2,650,000
Related allowance	0	0	0
Average balance of impaired loans	365,000	1,463,000	1,890,000
Interest income recognized	0	0	95,000
Impaired loans without an allowance | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	10,221,000	14,595,000	10,905,000
Unpaid principal balance	11,322,000	14,627,000	10,902,000
Related allowance	0	0	0
Average balance of impaired loans	12,945,000	15,796,000	9,039,000
Interest income recognized	0	0	0
Impaired loans without an allowance | Consumer and Other
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	0	0	0
Unpaid principal balance	0	0	0
Related allowance	0	0	0
Average balance of impaired loans	0	0	0
Interest income recognized	$ 0	$ 0	$ 0

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
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