Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Arthur J.Gallagher & Co.
Related Party Transaction [Line Items]
Print procurement services	$ 0.3	$ 0.4	$ 1.2	$ 1.1
Amount billed to the Company for consideration of services	0.2		0.2
Net amount receivable from related parties	0.3		0.3		$ 0.3
Enova Inc.
Related Party Transaction [Line Items]
Print procurement services	4.8	$ 2.9	10.8	$ 6.9
Net amount receivable from related parties	$ 4.6		$ 4.6		$ 2.0