Outstanding Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Credit Commitments and Contingencies
Adoption of CECL, reserve for unfunded commitments	$ 7,100	$ 7,100	$ 5,500
Adoption of CECL, additional provision	600	1,600
Commitments to extend credit
Credit Commitments and Contingencies
Financial instruments whose contract amounts represent credit risk:	1,705,344	1,705,344		$ 1,649,565
Standby letters of credit
Credit Commitments and Contingencies
Financial instruments whose contract amounts represent credit risk:	$ 47,886	$ 47,886		$ 42,581