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Debt - Summary of Balances for Long-term Debt and Finance Lease Obligations (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]    
Revolving credit facility $ 507,518 $ 519,000
Finance lease obligations 20,636 22,630
Total debt and finance lease obligations 528,154 541,630
Current portion 2,585 2,471
Noncurrent portion 525,569 539,159
Deferred financing costs, net 3,519 4,300
Noncurrent portion, net of deferred financing costs $ 522,050 $ 534,859