Employee Benefit Plans (Summary of the Fair Value Measurements by Type of Asset) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Total	$ 94,634	$ 74,580	$ 81,427
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	462	423
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	94,172	74,157
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	462	423
Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	462	423
Cash [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
U.S. Small/Mid Cap Growth [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	4,491	3,405
U.S. Small/Mid Cap Growth [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
U.S. Small/Mid Cap Growth [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	4,491	3,405
Non-U.S. Core [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	23,975	18,398
Non-U.S. Core [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
Non-U.S. Core [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	23,975	18,398
U.S. Large Cap Passive [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	13,523	10,471
U.S. Large Cap Passive [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
U.S. Large Cap Passive [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	13,523	10,471
Emerging Markets [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	4,559	3,217
Emerging Markets [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
Emerging Markets [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	4,559	3,217
U.S. Core Opportunistic [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	27,046	10,609
U.S. Core Opportunistic [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
U.S. Core Opportunistic [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	27,046	10,609
U.S. Passive [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	15,255	23,827
U.S. Passive [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
U.S. Passive [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	15,255	23,827
Opportunistic [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	5,323	4,230
Opportunistic [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total
Opportunistic [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	$ 5,323	$ 4,230