Deposits (Maturities Of Time Open And Certificates Of Deposit Detailed Breakdown By Size Category) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Deposits [Abstract]
Certificates Of Deposit under $100,000, Due in 3 months or less	$ 116,068
Certificates Of Deposit under $100,000, Due in over 3 through 6 months	117,046
Certificates Of Deposit under $100,000, Due in over 6 through 12 months	176,591
Certificates Of Deposit under $100,000, Due in over 12 months	176,386
Certificates Of Deposit under $100,000	586,091
Certificates Of Deposit over $100,000, Due in 3 months or less	446,300
Certificates Of Deposit over $100,000, Due in over 3 through 6 months	245,994
Certificates Of Deposit over $100,000, Due in over 6 through 12 months	184,426
Certificates Of Deposit over $100,000, Due in over 12 months	195,311
Certificates Of Deposit over $100,000	1,072,031
Due in 3 months or less, Total	562,368
Due in over 3 through 6 months, Total	363,040
Due in over 6 through 12 months, Total	361,017
Due in over 12 months, Total	371,697
Total	1,658,122
Aggregate amount of time open and certificates of deposit that exceed the $250,000 FDIC insurance limit	$ 824,000