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Miscellaneous Income, Net - Summary (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Income and Expenses [Abstract]      
Gains on sales of operating property and equipment $ 17,577 $ 2,478 $ 26,093
Insurance recoveries 1,033 1,155 1,734
Contract settlement 0 817 1,600
Foreign currency transaction gains (losses) 273 (459) 657
Rabbi trust investment income (loss) 11,221 (3,247) 10,522
Other, net 3,538 4,678 3,639
Total $ 33,642 $ 5,422 $ 44,245