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LONG-TERM DEBT - Schedule of Maturities of Long-term Debt (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
Debt Disclosure [Abstract]  
2019 $ 19,412
2020 76,956
2021 74,175
2022 376,123
2023 38,302
Thereafter 1,414,290
Long-term debt $ 1,999,258