CONSOLIDATED STATEMENTS OF CASH FLOWS - Summary of Assets Acquired and Liabilities Assumed Through Acquisition (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Summary of assets acquired and liabilities assumed through acquisitions:
Cash and cash equivalents, net of cash paid	$ 117,988,000	$ 36,028,000
Securities available-for-sale	45,069,000	63,723,000
Securities held-to-maturity	463,000
Net loans	685,964,000	336,446,000
Premises and equipment	1,756,000	350,000
Goodwill	83,878,000	38,039,000
Other intangible assets	11,147,000	8,361,000
Company owned life insurance	12,764,000
Other assets, net	29,397,000	14,736,000
Deposits	(774,259,000)	(416,628,000)
Subordinated debt	(10,000,000)
Other borrowings	(442,000)	(62,000)
Other liabilities	(18,127,000)	(3,038,000)
Presidio bank
Summary of assets acquired and liabilities assumed through acquisitions:
Common stock issued in acquisitions	$ 185,598,000
Tri Valley Bank and United American Bank
Summary of assets acquired and liabilities assumed through acquisitions:
Common stock issued in acquisitions		$ 78,005,000