Interest Bearing Deposits (Remaining Maturities Of Time Deposits of $100,000 Or More) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Three months or less	$ 731,819
Over three months through six months	450,689
Over six months through twelve months	841,269
Over twelve months	923,307
Time, $100,000 and over	$ 2,947,084	$ 1,684,498