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LONG-TERM DEBT AND LINES OF CREDIT - Schedule of maturities of long term debt (Details)
$ in Thousands
Jun. 30, 2017
USD ($)
Debt Disclosure [Abstract]  
2017 $ 47,644
2018 108,979
2019 141,912
2020 161,144
2021 180,376
2022 2,580,390
2023 and thereafter 1,083,875
Total $ 4,304,320