Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Contingency [Line Items]
U.S. statutory rate (as a percent)	35.00%	35.00%	35.00%	35.00%
Income tax expense (benefit)	$ (1.0)	$ (4.0)	$ (1.3)	$ (5.6)
Effective income tax rate reconciliation, percent		15.90%		10.20%
Tax Year 2012
Income Tax Contingency [Line Items]
Deferred tax assets, gross		$ 0.6		$ 0.6
Operating loss carryforwards, valuation allowance		$ 0.6		$ 0.6
BAM
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ (1.7)		$ (2.3)