Acquisitions - Narrative (Details) - USD ($)			3 Months Ended		12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 172,000,000.0	$ 0
Acquisition-related and integration charges			$ 5,200,000	1,100,000
Cummins-Allison
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue				$ 880,100,000
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	$ 172,000,000
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