Acquisition of Business (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
REVENUES	$ 465,955	$ 404,146	$ 1,251,915	$ 1,171,217
Goodwill	395,974		395,974		$ 395,974
Long-term Debt	1,369,194		1,369,194		1,479,077
Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Long-term Debt	$ 432,000		$ 432,000		$ 140,000