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LONG-TERM OBLIGATIONS (Detail Textuals) - First Tennessee Bank National Association - Revolving Credit Facility - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Feb. 29, 2016
Jun. 11, 2015
Dec. 21, 2011
Apr. 06, 2010
Line of Credit Facility [Line Items]          
Revolving credit facility     $ 30.0 $ 25.0 $ 20.0
Description of reference rate basis LIBOR Market Index Rate plus        
Variable interest rate in addition to reference rate 1.50%        
Interest rate 1.93%        
Subsequent Event          
Line of Credit Facility [Line Items]          
Outstanding borrowings credit facility   $ 10.0      
Minimum          
Line of Credit Facility [Line Items]          
Non-usage fee for current loan agreement in annual amount percentage 0.15%        
Maximum          
Line of Credit Facility [Line Items]          
Non-usage fee for current loan agreement in annual amount percentage 0.35%