Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 09, 2020 USD ($)
Accounting Standards and Supplemental Information [Line Items]
Number of operating segments | segment	4
Number of reportable segments | segment	1
Accounts receivable, customary payment terms	30 days
Accounts receivable, days beyond which terms are considered extended payment terms	30 days
Percentage of LIFO inventory	67.00%	93.00%
Goodwill impairment	$ 0		$ 0
Goodwill	81,962,000	$ 11,160,000
Amortization	6,683,000	2,402,000	1,777,000
Future amortization expense, year one	9,438,000
Future amortization expense, year two	8,604,000
Future amortization expense, year three	7,999,000
Future amortization expense, year four	7,762,000
Future amortization expense, year five	7,408,000
Future amortization expense, after year five	23,267,000
Indefinite-lived intangible assets	0
Research and development costs	10,000,000	5,000,000	6,000,000
Advertising costs	4,900,000	4,100,000	$ 4,900,000
Notes receivable, unpaid balance	$ 1,000,000	1,300,000
Capitalized Software | Minimum
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	2 years
Capitalized Software | Maximum
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	10 years
Customer Relationships | Minimum
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	10 years
Customer Relationships | Maximum
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	20 years
Trade Names
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	10 years
Non-Compete Agreements
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	5 years
Patents
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	14 years
Trademarks
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	15 years
Technology | Maximum
Accounting Standards and Supplemental Information [Line Items]
Useful life (in years)	7 years
Poppin, Inc.
Accounting Standards and Supplemental Information [Line Items]
Goodwill	$ 70,801,000	$ 0		$ 70,801,000