Litigation, Claims, Contingencies and Other - Narrative (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) Agreement	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Environmental remediation liability	$ 2,400,000
Maximum potential amount of future payments	$ 19,300,000
Guarantees relate to facilities leased by the company	2027-10
Recourse provision to recover guarantees	$ 0
Bargaining agreements | Agreement	100
Self insurance reserve	$ 19,100,000
Workers' compensation liability	13,800,000
Self insurance reserve for general and auto	5,300,000
Self insurance reserve on discontinued operations	2,900,000
Payments for self insurance	5,500,000	$ 5,000,000	$ 5,600,000
Self insurance reserve in which company is the primary obligor	10,400,000
Self insurance reserve in which company is the primary obligor for workers compensation	6,900,000
Self insurance reserve in which company is the primary obligor for general liability	3,500,000
Minimum
Loss Contingencies [Line Items]
General range on claims	200,000
Maximum
Loss Contingencies [Line Items]
General range on claims	$ 500,000