Debt and Credit Agreements - Schedule of Long Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Long-term Debt	$ 778,164	$ 592,151
Long-term Debt, Gross	795,015	605,394
Debt Issuance Costs, Noncurrent, Net	16,851	13,243
Current maturities of long-term debt	2,666	6,489
Long-term debt	775,498	585,662
Revolving Credit Facility
Line of Credit Facility [Line Items]
Long-term Debt	67,000	62,000
Senior Secured Credit Facilities
Line of Credit Facility [Line Items]
Current maturities of long-term debt		5,400
Term Loan
Line of Credit Facility [Line Items]
Long-term Debt	218,188	541,788
Notes Payable, Other Payables [Member]
Line of Credit Facility [Line Items]
Long-term Debt	9,827	1,606
5.75% notes due May 15,2018 | Senior Notes
Line of Credit Facility [Line Items]
Long-term Debt	$ 500,000	$ 0