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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowance for Doubtful Accounts [Member]      
Balance at Beginning of Period $ 755 $ 685 $ 1,748
Charged to Profit and Loss 416 411 124
Deduction from Reserves (420) (341) (1,187)
Balance at End of Period 751 755 685
Valuation Allowance of Deferred Tax Assets [Member]      
Balance at Beginning of Period 1,858 1,894 940
Charged to Profit and Loss 5,217 26 $ 954
Deduction from Reserves (18) (62)
Balance at End of Period $ 7,057 $ 1,858 $ 1,894