Employee Benefit Plans - Narrative (Details)	3 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) plan	Sep. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2012 USD ($) quarter	Jan. 05, 2015 USD ($)	Nov. 18, 2014 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, 401(k) Plan, Employer Matching Contribution, Amount	$ 400,000	$ 400,000
Number of non-pension multiemployer plans that the Company participates in	10
Labor Management Pension Fund [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Withdrawal obligation				$ 4,300,000	$ 4,900,000	$ 4,400,000
Quarterly installment payments on estimated withdrawal liability			$ 91,000	$ 100,000
Number of quarters relating to installment payments on estimated withdrawal liability | quarter				80
Multiemployer Plans, Pension [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of non-pension multiemployer plans that the Company participates in | plan	2