Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS Estimated Fair Value Of Other Financial Assets And Liabilities (Details)

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FAIR VALUE MEASUREMENTS Estimated Fair Value Of Other Financial Assets And Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, including current portion $ 254,509 $ 266,976
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, including current portion 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, including current portion 236,663 243,817
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, including current portion $ 0 $ 0