Fair Value Measurements (Schedule Of Estimates Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets:
Securities available-for-sale	$ 1,157,399	$ 810,106
Securities held-to-maturity	0	49,036
Other securities	26,548	28,490
Net loans	3,639,099	3,604,510
Accrued interest receivable	16,627	11,569
Liabilities:
Deposits	4,420,076	4,075,894
Carrying Amount
Assets:
Cash and cash equivalents	252,718	140,144
Securities available-for-sale	1,157,399	810,106
Securities held-to-maturity		49,036
Other securities	10,936	12,634
Net loans	3,639,099	3,604,510
Accrued interest receivable	16,627	11,569
Derivative assets	62,687	19,310
Liabilities:
Deposits	4,420,076	4,075,894
Short-term debt	279,866	211,255
Long-term debt		4,056
Accrued interest payable	2,047	2,849
Derivative liabilities	63,020	19,380
Fair Value
Assets:
Cash and cash equivalents	252,718	140,144
Securities available-for-sale	1,157,399	810,106
Securities held-to-maturity		50,598
Other securities	10,936	12,634
Net loans	3,626,632	3,574,435
Accrued interest receivable	16,627	11,569
Derivative assets	62,687	19,310
Liabilities:
Deposits	4,439,585	4,094,493
Short-term debt	279,866	211,255
Long-term debt		4,124
Accrued interest payable	2,047	2,849
Derivative liabilities	63,020	19,380
Level 1
Assets:
Cash and cash equivalents	252,718	140,144
Securities available-for-sale	0	0
Securities held-to-maturity		0
Other securities	5,955	7,787
Net loans	0	0
Accrued interest receivable	16,627	11,569
Derivative assets	0	0
Liabilities:
Deposits	3,119,785	2,711,323
Short-term debt	0	0
Long-term debt		0
Accrued interest payable	2,047	2,849
Derivative liabilities	0	0
Level 2
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	1,148,125	800,400
Securities held-to-maturity		50,598
Other securities	4,981	4,847
Net loans	0	0
Accrued interest receivable	0	0
Derivative assets	62,687	19,310
Liabilities:
Deposits	1,319,800	1,383,170
Short-term debt	279,866	211,255
Long-term debt		4,124
Accrued interest payable	0	0
Derivative liabilities	63,020	19,380
Level 3
Assets:
Cash and cash equivalents	0	0
Securities available-for-sale	9,274	9,706
Securities held-to-maturity		0
Other securities	0	0
Net loans	3,626,632	3,574,435
Accrued interest receivable	0	0
Derivative assets	0	0
Liabilities:
Deposits	0	0
Short-term debt	0	0
Long-term debt		0
Accrued interest payable	0	0
Derivative liabilities	$ 0	$ 0