Other Non-Operating Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			1 Months Ended			6 Months Ended
	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013 Senior secured credit facility - revolving loan due 2018	Jun. 30, 2013 Term loan	Jun. 30, 2013 Revolving credit line	Jun. 30, 2012 6.75% senior subordinated notes due 2015
Other non-operating expense
Pre-tax charge incurred on call premium	$ 1.0						$ 1.1
Maximum borrowing capacity				600
Debt maturity period				5 years
Face value					82.5	360.0
Senior subordinated notes redeemed							$ 73.5
Interest rate (as a percent)		6.75%	6.75%				6.75%
Call premium (as a percent)							1.125%