Employee Benefit Plans (Schedule of Fair Value of Pension Plan Assets) (Details) - Pension Benefit Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair value of plan assets	$ 80,380	$ 66,771	$ 69,215
Fair Value, Level 1 [Member]
Fair value of plan assets	80,380	66,771
Fair Value, Level 2 [Member]
Fair value of plan assets
Fair Value, Level 3 [Member]
Fair value of plan assets
Equity Securities [Member]
Fair value of plan assets	10,418	8,683
Equity Securities [Member] | Fair Value, Level 3 [Member]
Fair value of plan assets
Mutual Funds [Member]
Fair value of plan assets	69,565	57,014
Mutual Funds [Member] | Fair Value, Level 1 [Member]
Fair value of plan assets	69,565	57,014
Mutual Funds [Member] | Fair Value, Level 2 [Member]
Fair value of plan assets
Mutual Funds [Member] | Fair Value, Level 3 [Member]
Fair value of plan assets
Money Market Funds [Member]
Fair value of plan assets	397	1,074
Money Market Funds [Member] | Fair Value, Level 1 [Member]
Fair value of plan assets	397	1,074
Money Market Funds [Member] | Fair Value, Level 2 [Member]
Fair value of plan assets
Money Market Funds [Member] | Fair Value, Level 3 [Member]
Fair value of plan assets
Equity Securities [Member] | Fair Value, Level 1 [Member]
Fair value of plan assets	10,418	8,683
Equity Securities [Member] | Fair Value, Level 2 [Member]
Fair value of plan assets