Employee Benefit Plans (Schedule of Fair Value of Pension Plan Assets) (Details) - Pension Benefit Plan [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Level 1 [Member]
Fair value of plan assets	$ 88,921	$ 80,380
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	11,809	10,418
Equity Securities [Member] | Fair Value, Level 3 [Member]
Fair value of plan assets
Mutual Funds [Member]
Fair value of plan assets	76,026	69,565
Mutual Funds [Member] | Fair Value, Level 1 [Member]
Fair value of plan assets	76,026	69,565
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	1,086	397
Money Market Funds [Member] | Fair Value, Level 1 [Member]
Fair value of plan assets	1,086	397
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	11,809	10,418
Equity Securities [Member] | Fair Value, Level 2 [Member]
Fair value of plan assets