Finance Receivables (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Provisions charged to income	$ 1,659	$ 10,848
Life Science Term Loans [Member]
Beginning Balance	7,082
Provisions charged to income		10,848
Charge-Offs	(7,082)	(3,766)
Recoveries
Ending Balance		7,082
Life Science Royalty Purchases [Member]
Beginning Balance
Provisions charged to income	1,659
Charge-Offs
Recoveries
Ending Balance	$ 1,659