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Schedule of Debt Maturities (Details) - April 2017 term debt
$ in Thousands
Dec. 31, 2017
USD ($)
Debt Instrument [Line Items]  
2018 $ 0
2019 5,625
2020 7,500
2021 7,500
2022 7,500
2023 & Beyond 706,875
Long-term Debt $ 735,000