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INDEBTEDNESS (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Long-term debt    
Long-term debt $ 235,000 $ 220,000
Less: Current maturities of long-term debt 10,000 10,000
Less: Deferred financing fees, net 1,284 1,617
Long-term debt 223,716 208,383
Revolving credit facility    
Long-term debt    
Long-term debt 65,000 45,000
Term loan    
Long-term debt    
Long-term debt $ 170,000 $ 175,000