Fair Value Measurements (Details Textual) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indefinite-Lived License Agreements	$ 86,762,000				$ 88,460,000				$ 86,762,000	$ 88,460,000	$ 90,361,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	1,936,000	0	0	0	2,033,000	0	0	0	1,936,000	2,033,000	0
Other Intangible Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Indefinite-Lived License Agreements	15,218,000				8,620,000				15,218,000	8,620,000
Assets, Fair Value Disclosure, Nonrecurring	$ 13,282,000				$ 6,587,000				$ 13,282,000	$ 6,587,000