Acquisition, Restructuring and Integration Costs - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Accrual for restructuring, merger and integration costs	$ 1.2	$ 3.3
Compensation and Payroll Withholdings
Business Acquisition [Line Items]
Accrual for restructuring, merger and integration costs	0.9	1.0
Accrued Expenses
Business Acquisition [Line Items]
Accrual for restructuring, merger and integration costs	$ 0.3	2.1
Other long-term Liabilities
Business Acquisition [Line Items]
Accrual for restructuring, merger and integration costs		$ 0.2