Employee Benefit Plans (Summary Of Fair Value Of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 186,964	$ 206,570	$ 175,644
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	186,964	206,570
Level 1 [Member] | Fixed Maturities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	102,047	110,936
Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	84,909	95,452
Level 1 [Member] | Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 8	$ 182