Leases Supplemental Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($) Rate
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Cash paid for operating lease liabilities	$ 15.9
Operating lease right of use assets obtained in exchange for new operating leases	$ 7.6
Operating Lease, Weighted Average Remaining Lease Term	4 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent | Rate	4.60%