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Basis of Presentation and Summary of Significant Accounting Policies (Summary of Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Supplemental information:
Cash paid for interest	$ 23,533	$ 28,672
Cash paid for income taxes	5,656	8,666
Noncash investing and financing activities:
Real estate and other assets acquired in settlement of loans	2,966	159
Accrued and declared unpaid dividends	$ 4,534	4,363
Increase in net unsettled security purchases		(2,650)
Common stock issued for Courier Capital contingent earn-out		$ 1,151

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