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Notes Receivable-Related Party (Details) - USD ($)
$ in Thousands
12 Months Ended 39 Months Ended 54 Months Ended
Dec. 31, 2015
Jun. 30, 2012
Dec. 31, 2011
Mar. 31, 2016
Mar. 31, 2015
Jun. 25, 2007
Receivables [Abstract]            
Notes Receivable, Related Parties, Noncurrent $ 2,990     $ 2,903 $ 3,244 $ 3,000
Related Party Transaction, Rate   6.00%        
Interest income related party -in dollars     $ 1,090      
Debt Instrument, Decrease, Forgiveness $ 409