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Long-Term Debt (Details 2)
$ in Thousands
Dec. 31, 2016
USD ($)
Aggregate annual maturities of long-term debt  
2016 $ 56,506
2017 33,434
2018 80,133
2019 41,683
2020 52,481
Thereafter 1,008,935
Total Debt $ 1,273,172