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Acquisition of Business (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Business Acquisition [Line Items]          
REVENUES $ 377,794 $ 334,576 $ 767,071 $ 682,759  
Goodwill 395,974   395,974   $ 395,974
Business Combination, Acquisition Related Costs 0 $ 0 0 $ 373  
Long-term Debt 1,519,339   1,519,339   1,484,384
Revolving Credit Facility [Member]          
Business Acquisition [Line Items]          
Long-term Debt $ 177,900   $ 177,900   $ 632,900