Acquisitions - Allocations of Total Purchase Price (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Aug. 03, 2020	Jul. 20, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 38.6	$ 38.7			$ 33.1
CON-E-CO
Business Acquisition [Line Items]
Accounts receivable				$ 2.3
Inventories				8.1
Other assets				6.3
Intangible assets				4.3
Total assets acquired				21.0
Accounts payable and other				(4.4)
Advance customer deposits				(2.8)
Total liabilities assumed				(7.2)
Total purchase price				$ 13.8
BMH Systems
Business Acquisition [Line Items]
Cash			$ 1.2
Accounts receivable			6.4
Inventories			2.0
Goodwill			6.3
Other assets			3.8
Intangible assets			5.7
Total assets acquired			25.4
Total liabilities assumed			(9.8)
Total purchase price			$ 15.6