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Summary of Significant Accounting Policies - Self Insurance (Details)
$ in Millions
Mar. 31, 2016
USD ($)
Jul. 17, 2015
ft²
Jun. 30, 2015
USD ($)
Line of Credit Facility [Line Items]      
Area of Real Estate Property | ft²   538,000  
Workers' Compensation Liability $ 13.6   $ 13.4
Estimated recovery from third party 2.2   2.5
Letters of Credit Outstanding, Amount     4.3
Self Insurance Reserve, Medical Insurance 1.0   1.0
Liability for Unpaid Claims and Claims Adjustment Expense, Gross 1.4   0.8
Letter of credit, Sef-insurance, California [Member]      
Line of Credit Facility [Line Items]      
Letters of Credit Outstanding, Amount 7.0   $ 7.0
Letter of Credit, Self-insurance, Non-California [Member]      
Line of Credit Facility [Line Items]      
Letters of Credit Outstanding, Amount $ 4.3