Litigation (Details) $ in Millions				5 Months Ended
	Aug. 05, 2015 USD ($)	Nov. 19, 2014 USD ($)	Sep. 14, 2010 USD ($)	Mar. 31, 2016 lawsuit	Oct. 28, 2015 USD ($)
Income Tax Contingency [Line Items]
Number of lawsuits challenging merger | lawsuit				6
Contract termination fee					$ 69.5
Tax Years 2006 Through 2008
Income Tax Contingency [Line Items]
Alleged tax deficiency			$ 13.3
Tax Years 2009 Through 2010
Income Tax Contingency [Line Items]
Alleged tax deficiency		$ 6.1
Tax Years 2011 Through 2013
Income Tax Contingency [Line Items]
Alleged tax deficiency	$ 2.1