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LONG-TERM DEBT - Interest Rate Swaps (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2016
USD ($)
Interest rate swaps  
Interest rate swaps  
Notional Amount $ 170,000
Interest Rate Swap - April 2016  
Interest rate swaps  
Notional Amount $ 90,000
Fixed Rate 2.355%
Benchmark Interest Rate 30 year - LIBOR
Effective Date Apr. 01, 2019
Maturity Date Apr. 01, 2049
Interest Rate Swap - June 2016  
Interest rate swaps  
Notional Amount $ 80,000
Fixed Rate 2.304%
Benchmark Interest Rate 30 year - LIBOR
Effective Date Jun. 01, 2019
Maturity Date Jun. 01, 2049