Employee Benefit Plans (Funded Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 28,088	$ 31,381	$ 65,108
Plan assets at fair value at end of year	0	0	25,225
RELS Pension Plan, SERPS and Restoration Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	28,088	31,381	65,108
Accumulated benefit obligation	28,088	31,381	65,108
Plan assets at fair value at end of year	$ 0	$ 0	$ 25,225