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Debt and Credit Agreements - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Debt Obligation | $ 1,355,645 | $ 1,300,532
Less: deferred financing costs | (19,543) | (15,767)
Total debt obligations, net of deferred financing costs | 1,336,102 | 1,284,765
Current maturities of long-term debt | (8,514) | (13,576)
Long-term debt | 1,327,588 | 1,271,189
Other financing payable (including finance leases) in varying amounts |  |
Debt Instrument [Line Items] |  |
Debt Obligation | 22,645 | 21,344
Term Loan Facility | New Term Loan |  |
Debt Instrument [Line Items] |  |
Debt Obligation | 500,000 | 0
Term Loan Facility | Term Loan A |  |
Debt Instrument [Line Items] |  |
Debt Obligation | 0 | 280,000
Term Loan Facility | Term Loan B |  |
Debt Instrument [Line Items] |  |
Debt Obligation | 0 | 218,188
Line of Credit | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Debt Obligation | 333,000 | 281,000
Senior Notes | 5.75% Notes, due July 31, 2027 |  |
Debt Instrument [Line Items] |  |
Debt Obligation | $ 500,000 | $ 500,000

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