Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 121,167	$ 117,623
Less: Accumulated depreciation	33,279	36,523
Premises and equipment, net	87,888	81,100
Depreciation	4,700	4,400	$ 3,900
Land
Property, Plant and Equipment [Line Items]
Total premises and equipment	22,003	22,954
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Total premises and equipment	72,810	69,315
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 26,354	$ 25,354