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Employee Benefit Plans (Fair Value of Plan Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets $ 24,051 $ 15,716 $ 13,306
Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,311 506  
Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 13,192 8,038  
Mutual and other exchange traded funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 9,548 7,172  
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 24,051 15,716  
Level 1 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 1,311 506  
Level 1 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 13,192 8,038  
Level 1 | Mutual and other exchange traded funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 9,548 7,172  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Level 2 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Level 2 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Level 2 | Mutual and other exchange traded funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Level 3 | Cash and cash equivalents      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Level 3 | Equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets 0 0  
Level 3 | Mutual and other exchange traded funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of pension plan assets $ 0 $ 0