Acquisitions - Narrative (Details) - USD ($)			3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired					$ 172,300,000	$ 0
Acquisition-related and integration charges			$ 2,300,000	$ 2,400,000	$ 7,500,000	3,500,000
Cummins-Allison
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue				$ 888,900,000		$ 1,769,000,000.0
Payments to Acquire Businesses, Gross		$ 160,000,000
Payments to Acquire Businesses, Net of Cash Acquired		156,200,000
Debt instrument, face amount		$ 150,000,000					$ 150,000,000
I&S (acquisition)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 172,300,000
Debt instrument, face amount	100,000,000
Proceeds from Lines of Credit	$ 67,000,000
Trade Names | Cummins-Allison
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Remaining Amortization Period					7 years
Trade Names | I&S (acquisition)
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Remaining Amortization Period					13 years
Customer Relationships | Cummins-Allison
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Remaining Amortization Period					18 years
Customer Relationships | I&S (acquisition)
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Remaining Amortization Period							14 years
Technology-Based Intangible Assets | Cummins-Allison
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Remaining Amortization Period					10 years