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Other Intangible Assets, Other than Goodwill (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]      
Amortization $ 852 $ 953 $ 2,909
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 991    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 991    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 991    
Finite-Lived Intangible Assets, Amortization Expense, Year Four 602    
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 214