Deposits (Maturities Of Time Open And Certificates Of Deposit Detailed Breakdown By Size Category) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Deposits [Abstract]
Certificates Of Deposit under $100,000, Due in 3 months or less	$ 117,635
Certificates Of Deposit under $100,000, Due in over 3 through 6 months	144,309
Certificates Of Deposit under $100,000, Due in over 6 through 12 months	223,756
Certificates Of Deposit under $100,000, Due in over 12 months	140,457
Certificates Of Deposit under $100,000	626,157
Certificates Of Deposit over $100,000, Due in 3 months or less	632,064
Certificates Of Deposit over $100,000, Due in over 3 through 6 months	286,240
Certificates Of Deposit over $100,000, Due in over 6 through 12 months	323,038
Certificates Of Deposit over $100,000, Due in over 12 months	140,513
Certificates Of Deposit over $100,000	1,381,855
Due in 3 months or less, Total	749,699
Due in over 3 through 6 months, Total	430,549
Due in over 6 through 12 months, Total	546,794
Due in over 12 months, Total	280,970
Total	2,008,012
Aggregate amount of time open and certificates of deposit that exceed the $250,000 FDIC insurance limit	$ 1,100,000