Business Combination (Details) $ in Thousands		12 Months Ended
	Oct. 30, 2020 USD ($) item shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Cash payment		$ 54,836	$ 0	$ 0
Goodwill		$ 17,636	$ 16,127
Increase in assets through acquisition	$ 982,700
New branches through acquisition | item	4
Empire
Business Acquisition [Line Items]
Voting interest acquired (as a percent)	100.00%
Total consideration paid	$ 87,541
Cash payment	$ 54,836
Shares | shares	2,557,028
Goodwill	$ 1,509
Merger cost	$ 6,900
Empire | Core deposits
Business Acquisition [Line Items]
Amortization period	10 years