Leases - Additional Information (Details) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)	Jul. 01, 2007 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 24.9		$ 0.0	$ 27.1
Operating lease liabilities	$ 27.2			$ 29.5
Deferred gain on sale-leaseback transactions			8.7		$ 29.0
Deferred tax impact of remaining deferred gain associated with the sale-leaseback transactions			2.2
Sale-leaseback transaction lease period	15 years
Deferred gain	$ 0.0	$ 0.9	$ 1.9
Number of principal manufacturing plants leased	8
Number of principal manufacturing plants	14
Weighted-average remaining lease term – operating leases	4 years
Weighted-average discount rate – operating leases	4.00%
Joe Johnson Equipment
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 0.6
Number of facility operating leases with affiliates	2
Initial lease term for two facilities owned by affiliates of the sellers of JJE	5 years