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Loans and Allowance for Credit Losses - Impaired loans, by class of loan (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2019
Unpaid Contractual Principal Balance		$ 54,883		$ 54,883
Recorded Investment With No Allowance		35,235		35,235
Recorded Investment With Allowance		19,648		19,648
Total Recorded Investment		54,883		54,883
Related Allowance		9,124		9,124
Average Recorded Investment		54,258
Interest Income Recognized	$ 717		$ 701	941
Commercial
Unpaid Contractual Principal Balance		15,814		15,814
Recorded Investment With No Allowance		11,858		11,858
Recorded Investment With Allowance		3,956		3,956
Total Recorded Investment		15,814		15,814
Related Allowance		5,714		5,714
Average Recorded Investment		15,682
Interest Income Recognized				270
Income Producing - Commercial Real Estate
Unpaid Contractual Principal Balance		14,093		14,093
Recorded Investment With No Allowance		2,713		2,713
Recorded Investment With Allowance		11,380		11,380
Total Recorded Investment		14,093		14,093
Related Allowance		2,145		2,145
Average Recorded Investment		18,133
Interest Income Recognized				382
Owner Occupied - Commercial Real Estate
Unpaid Contractual Principal Balance		7,349		7,349
Recorded Investment With No Allowance		6,388		6,388
Recorded Investment With Allowance		961		961
Total Recorded Investment		7,349		7,349
Related Allowance		415		415
Average Recorded Investment		6,107
Interest Income Recognized				197
Real Estate Mortgage Residential
Unpaid Contractual Principal Balance		5,631		5,631
Recorded Investment With No Allowance		3,175		3,175
Recorded Investment With Allowance		2,456		2,456
Total Recorded Investment		5,631		5,631
Related Allowance		650		650
Average Recorded Investment		5,638
Construction - Commercial and Residential
Unpaid Contractual Principal Balance		11,509		11,509
Recorded Investment With No Allowance		11,101		11,101
Recorded Investment With Allowance		408		408
Total Recorded Investment		11,509		11,509
Related Allowance		100		100
Average Recorded Investment		8,211
Interest Income Recognized				92
Home Equity
Unpaid Contractual Principal Balance		487		487
Recorded Investment With Allowance		487		487
Total Recorded Investment		487		487
Related Allowance		100		$ 100
Average Recorded Investment		$ 487

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524

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