Employee Benefit Plans - Schedule of Multi-Employer Pension Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Multiemployer Plans [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment			$ 5,800
Local 807 Pension Plan
Multiemployer Plans [Line Items]
Other Commitment	$ 182			$ 182
Multiemployer Plan
Multiemployer Plans [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	272	$ 240		809	$ 1,120
Other Postretirement Benefit Plan
Multiemployer Plans [Line Items]
Service cost	5	147		14	441
Interest cost	73	214		220	641
Defined Benefit Plan, Amortization of Gain (Loss)	(80)	125		5,376	374
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0	5,750		0	5,750
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	(395)		(8,961)	(1,186)
Net periodic benefit cost	$ 158	$ (5,909)		$ (14,103)	$ (6,228)
Postretirement Health Coverage
Multiemployer Plans [Line Items]
Discount rate				0.06%	3.62%
Postretirement Life Insurance
Multiemployer Plans [Line Items]
Discount rate				2.87%	3.64%