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10. DERIVATIVE INSTRUMENTS (Tables)
12 Months Ended
Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Fair value of derivatives
Derivatives  Balance Sheet Location Fair Value – Asset Derivatives
Interest rate contracts Current assets $818
Effect of derivative instruments on comprehensive income
Effective Interest Rate Cap Amount of Gain Recognized on Derivative Location of Gain Recognized in Income on Derivative
Interest rate contracts $818 Other Comprehensive Income