Legal Proceedings (Details) - USD ($) $ in Millions	1 Months Ended			12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Mar. 31, 2010	Dec. 31, 2016
Holten Settlement
Loss Contingencies [Line Items]
Amount alleged to be payable to indirect controlling shareholder (more than)			$ 3.8
Amount payable to indirect controlling shareholder		$ 3.4
Amount to be recovered by the company through insurance		$ 1.9
Expense recognized related to litigation settlement				$ 1.5
Settlement Agreement
Loss Contingencies [Line Items]
Amount payable to indirect controlling shareholder	$ 2.5
Expense recognized related to litigation settlement, net of tax	0.5
General and administrative expenses | Settlement Agreement
Loss Contingencies [Line Items]
Expense recognized related to litigation settlement	$ 0.8