Virginia Partners Transaction - Consideration Paid and Fair Value of Identifiable Assets Acquired and Liabilities Assumed (Details) $ in Thousands	Nov. 15, 2019 USD ($) item shares	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Liabilities assumed:
Goodwill		$ 9,391	$ 9,391	$ 5,237
Virginia Partners Bank
Business combination
Conversion of common stock | shares	1.7179
Number of new branches added | item	3
Consideration paid:
Cash consideration	$ 2
Common stock issued in acquisition	52,282
Stock options issued in acquisition (replacement awards)	350
Total consideration paid	52,634
Assets acquired:
Cash and cash equivalents	6,743
Investment securities	65,373
Investments in correspondent bank stock	3,670
Loans	357,127
Premises and equipment	6,969
Accrued interest receivable	1,155
Intangible assets	2,650
Deferred tax asset	1,239
Other assets	9,242
Total assets acquired	454,168
Liabilities assumed:
Deposits	348,552
Other liabilities	56,408
Total liabilities assumed	404,960
Net assets acquired	49,208
Noncontrolling interest in consolidated subsidiaries	728
Goodwill	$ 4,154