Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended						12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018	Jul. 01, 2019
Property, Plant and Equipment
Defined contribution plan, employer matching contribution, percent of eligible income							6.00%
Selling expenses	$ 21,274		$ 31,968		$ 34,906	$ 33,614	$ 121,762	$ 139,647	$ 153,391
Concentration risk (percent)							100.00%	100.00%	100.00%
Undiscounted workers' compensation liability	5,200	$ 5,400					$ 5,200	$ 5,400
Reinsurance recoveries	800	900					800	900
Liability for claims and claims adjustment expense	1,600	1,800					1,600	1,800
Right-of-use operating lease assets	21,117						21,117			$ 16,300
Operating lease, liability	21,482						$ 21,482			$ 16,300
Operating Lease, Remaining Contractual Term							8 years
Operating Lease, Extension Term							10 years
Cash
Property, Plant and Equipment
Letter of credit posted as security deposit	1,500							1,400
Security Deposit - Letter of Credit
Property, Plant and Equipment
Letter of credit posted as security deposit	2,300							$ 2,300
Workforce Subject to Collective Bargaining Arrangements
Property, Plant and Equipment
Concentration risk (percent)							19.00%
Health Insurance Product Line
Property, Plant and Equipment
Self Insurance Reserve	900						$ 900
Shipping and Handling
Property, Plant and Equipment
Selling expenses	$ 9,800	$ 11,400		$ 11,900
Building and Facilities | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life							30 years
Building and Facilities | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life							10 years
Machinery and Equipment | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life							15 years
Machinery and Equipment | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life							3 years
Office Furniture and Equipment | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life							7 years
Office Furniture and Equipment | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life							5 years
Capitalized Software Costs | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life							5 years
Capitalized Software Costs | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life							3 years
Five Customers [Member]
Property, Plant and Equipment
Concentration risk (percent)							39.00%	28.00%