Related Party Transactions - Additional Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Related Party Transaction [Line Items]
Reimbursement Agreements termination period by either party	90 days
Insurance program renewal period	5 years
Insurance program renewal term period	January 31, 2012 through January 31, 2017
Reimbursements Received
Related Party Transaction [Line Items]
Reimbursements from (to) related party		$ 1.8
Reimbursement Agreement
Related Party Transaction [Line Items]
Reimbursements from (to) related party	3.8	4.4
Due from Related Parties	$ 0		$ 0