Debt (Details 1) (Recourse, Convertible Subordinated Notes, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Recourse | Convertible Subordinated Notes
Total interest expense recognized on the Convertible Subordinated Notes
Coupon rate interest	$ 4.4	$ 4.4
Amortized debt discount	3.5	3.3
Total interest expense recognized on the Convertible Subordinated Notes	$ 7.9	$ 7.7