Quarterly report pursuant to Section 13 or 15(d)

Long-Tem Debt - Maturities of Long-Term Debt (Details)

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Long-Tem Debt - Maturities of Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
2019 $ 3,293  
2020 3,293  
2021 3,293  
2022 3,293  
2023 469,896  
Total Debt $ 483,068 $ 412,682