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Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 794,171 | $ 456,900
Financing leases | 420 | 0
Less: Current portion | 13,482 | 18,336
Total long-term debt | 780,689 | 438,564
Revolving line of credit |  |
Debt Instrument [Line Items] |  |
Total debt | 247,000 | 312,000
Term loan, net of deferred debt issuance costs of $1,627 and $311 in 2019 and 2018, respectively |  |
Debt Instrument [Line Items] |  |
Total debt | 256,748 | 144,064
Unamortized debt issuance cost | 1,627 | 311
2.625% convertible notes, net of deferred debt issuance costs of $9,421 and unamortized discount of $45,576 in 2019 |  |
Debt Instrument [Line Items] |  |
Convertible Debt | 290,003 | 0
Unamortized debt issuance cost | 9,421 | 0
Unamortized discount | 45,576 | 0
Mortgage notes |  |
Debt Instrument [Line Items] |  |
Total debt | $ 0 | $ 836

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