Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Long-term Purchase Commitment [Line Items]
Commitment To Contribute Capital	$ 26.6	$ 19.2
Private Equity Funds [Member]
Long-term Purchase Commitment [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	2.8	$ 2.8
Student Loan [Member]
Long-term Purchase Commitment [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	$ 12.6