Leases (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessee, Lease, Description [Line Items]
Lease expiration date	December 2026
Rent expense		$ 9.4	$ 9.9
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	6 years
Operating lease, renewal term option	5 years
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	1 year