Variable Interest Entities (Details) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Noncontrolling Interest in Variable Interest Entity	$ 71.2	$ 70.5
Variable Interest Entity, Consolidated, Carrying Amount, Assets	178.5	175.8
New Ocean Capital Management Ltd [Member]
Variable Interest Entity [Line Items]
Noncontrolling Interest in Variable Interest Entity	$ 0.7	$ 0.4