Employee Benefit Plans - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) plan shares	Dec. 31, 2018 USD ($) shares
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Amount	$ 0.6	$ 0.4	$ 1.3	$ 0.9
Other Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Multiemployer plans, number of plans | plan			9
Restated and Amended 401K Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer matching contribution, percent of eligible income			4.00%
Defined Contribution Plan, Number of Shares Contributed | shares			54,025	109,648.7
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 0.6	$ 1.4