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Debt (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Maturities of Long-term Debt

As of December 31, 2017, future minimum principal payments for long-term debt, including the current portion, are summarized as follows (in thousands):



2018	$	34,451
2019	6,000
2020	6,000
2021	6,000
2022	6,000
Thereafter	535,549
Total	$	594,000