Supplemental Cash Flow (Details) - USD ($)		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Supplemental financial data:
Cash paid for: interest		$ 8,866,000	$ 10,753,000
Cash paid for: income taxes		5,938,000	5,671,000
Cash paid for: lease liability		643,000	576,000
Supplemental schedule of non-cash activity:
Net purchases of investment securities not yet settled		10,119,000	2,950,000
Transfer from loans to other real estate owned		0	255,000
ROU lease assets: operating leases(1)	[1]	$ 0	$ 19,635,000

[1] This represents the right of use ("ROU") lease asset that was recorded upon adoption of ASC 842 in 2019 and new leases added in the periods indicated