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Employee Benefit Plans (Schedule of Projected Benefit Obligation) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Projected benefit obligation:    
Balance, January 1 $ 96,401 $ 98,790
Service cost 3,554 4,017
Interest cost 4,103 3,703
Actuarial loss (gain) 18,334 (7,768)
Benefits paid (2,565) (2,341)
Balance, December 31 119,827 96,401
Plan assets:    
Fair value, January 1 74,580 81,427
Actual return 15,719 (4,506)
Employer contribution 6,900
Benefits paid (2,565) (2,341)
Fair value, December 31 94,634 74,580
Funded status:    
Accrued pension liability $ (25,192) $ (21,821)