Acquisition of Business (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
REVENUES	$ 409,872	$ 377,794	$ 785,960	$ 767,071
Goodwill	395,974		395,974		$ 395,974
Long-term Debt	1,399,092		1,399,092		1,479,077
Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Long-term Debt	$ 464,000		$ 464,000		$ 140,000