Commitments and Contingencies, Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leases [Abstract]
Total expenses under operating lease obligations	$ 1.1	$ 1.3	$ 1.4
Office Space and Other Equipment
Operating Leases, Future Minimum Payments Due [Abstract]
2016	0.9
2017	1.0
2018	0.9
2019	0.9
2020	0.8
Thereafter	7.0
Total	$ 11.5