Employee Benefit Plans - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Other Postretirement Benefit Plans, Defined Contribution [Member] plan	Jun. 30, 2012 Labor Management Pension Fund [Member] quarter	Sep. 30, 2014 Pension Plan, Defined Benefit [Member] plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Withdrawal obligation				$ 4.3
Quarterly installment payments on estimated withdrawal liability				0.1
Number of quarters relating to installment payments on estimated withdrawal liability				80
Number of non-pension multiemployer plans that the Company participates in			8		2
Percentage of employee contribution eligible for Company matching	50.00%
Company contribution, maximum percentage of employee's eligible income	6.00%
Plan periodic vesting percentage	20.00%
Plan, periodic vesting period	5 years
Automatic vesting age	65 years
Current employees, percent vested	100.00%
Employer match contribution amount	$ 0.4	$ 0.4