Leases (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Right-of-use asset recognized as non-cash asset addition	$ 8.7	$ 8.2	$ 2.8	$ 6.1
Right-of-use assets obtained from business acquisitions		15.6
Cash paid for amounts included in measurement of operating lease liability		4.6	3.9	3.8
Total operating lease expense		15.7	10.1	8.5
Operating lease expense		4.8	3.8	3.8
Operating lease revenues		$ 11.7	$ 12.6	$ 13.9
Minimum
Lessee, Lease, Description [Line Items]
Operating leases, remaining term, lessee		1 year
Operating lease remaining term, lessor		2 years
Maximum
Lessee, Lease, Description [Line Items]
Operating leases, remaining term, lessee		18 years
Operating lease remaining term, lessor		10 years