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Basis of Presentation And Summary Of Significant Accounting Policies (Summary Of Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018
Supplemental information: |  |
Cash paid for interest | $ 18,818 | $ 13,187
Cash paid for income taxes | 5,220 | 1,916
Noncash investing and financing activities: |  |
Real estate and other assets acquired in settlement of loans | 68 | 414
Accrued and declared unpaid dividends | 4,361 | 4,184
Increase in net unsettled security purchases | 10,481 | 2,136
Common stock issued for Courier Capital contingent earn-out | $ 1,151 |
Assets acquired and liabilities assumed in business combinations: |  |
Fair value of assets acquired |  | 2,561
Fair value of liabilities assumed |  | $ 128

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