Debt Obligations (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended				0 Months Ended		1 Months Ended		0 Months Ended	1 Months Ended
	Aug. 31, 2013 Senior secured term notes due 2017, net	May 06, 2014 $10.0 million secured revolving credit facility due 2018	Feb. 28, 2013 $10.0 million secured revolving credit facility due 2018	May 06, 2014 $10.0 million secured revolving credit facility due 2018 Letters of credit	Feb. 28, 2013 Revolver Phase	Feb. 28, 2013 Revolver Phase Letters of credit	Aug. 31, 2013 $75.0 million unsecured revolving credit facility	May 06, 2014 $75.0 million unsecured revolving credit facility	Aug. 07, 2013 Senior notes due 2021	Aug. 31, 2013 Senior notes due 2021	Mar. 31, 2014 Senior notes due 2021
Debt obligations
Interest rate (as a percent)										6.875%
Principal amount of notes issued or redeemed	$ 125.0									$ 200.0
Debt instruments previously held by the second largest shareholder and one of its affiliates											10.0
Net proceeds from debt after deducting fees and expenses										195.5
Net proceeds from offering used to prepay the entire outstanding principal amount of debt	127.0
Redemption price (as a percent)	101.00%
Parent's ownership percentage of the Guarantors											100.00%
Minimum number of days after the date of notice of the registered exchange offer sent to holders of debt instrument for registered exchange offer to remain open									30 days
Debt issuance costs, Registration Rights Agreement											0.2
Term Of loan					36 months		4 years
Maximum borrowing capacity			10.0			5.0	75.0
Amount drawn				2.0
Borrowing capacity		$ 8.0						$ 75.0