Summary of Significant Accounting Policies - Self Insurance (Details) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015
Accounting Policies [Abstract]
Workers' Compensation Liability	$ 13.2	$ 13.4
Loss Contingency, Estimated Recovery from Third Party, Amount	2.5	2.5
Letters of credit outstanding, amount	7.0	7.0
Medical insurance, reserve	0.9	1.0
Liability for Unpaid Claims and Claims Adjustment Expense, Gross	$ 1.1	$ 0.8