Commitments and Contingencies (Details) - USD ($) $ in Millions	1 Months Ended
	Aug. 31, 2009	Dec. 31, 2016
Loss Contingencies [Line Items]
Contractual obligation		$ 85.4
Letters of credit, oustanding amount		2.5
Unconsolidated joint venture debt, pro rata portion, if not paid by joint venture		$ 165.7
Breach of Severance Agreement [Member]
Loss Contingencies [Line Items]
Damages sought after, value	$ 0.9