Supplemental Guarantor Information (Narrative) (Details) - USD ($)	1 Months Ended
	Oct. 31, 2015	Apr. 30, 2015	Feb. 28, 2015	May 31, 2014
Initial Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount				$ 200,000,000
Maturity year				2022
Initial Exchange Notes [Member]
Debt Instrument [Line Items]
Principal amount			$ 200,000,000
Interest rate			6.875%
Maturity year			2022
Additional Senior Notes [Member]
Debt Instrument [Line Items]
Principal amount		$ 60,000,000
Interest rate		6.875%
Maturity year		2022
Additional Exchange Notes [Member]
Debt Instrument [Line Items]
Principal amount	$ 60,000,000
Interest rate	6.875%
Maturity year	2022