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Fair Value Measurements (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                        
Indefinite-Lived License Agreements $ 88,106,000       $ 86,762,000       $ 88,460,000 $ 88,106,000 $ 86,762,000 $ 88,460,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 874,000 $ 0 $ 0 $ 0 1,936,000 $ 0 $ 0 $ 0 2,033,000 874,000 1,936,000 2,033,000
Other Intangible Assets [Member]                        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                        
Indefinite-Lived License Agreements 13,282,000       15,218,000       8,620,000 13,282,000 15,218,000 8,620,000
Assets, Fair Value Disclosure, Nonrecurring $ 12,408,000       $ 13,282,000       $ 6,587,000 $ 12,408,000 $ 13,282,000 $ 6,587,000