Leases (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
Mar. 16, 2020	Oct. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Increase (decrease) in operating lease right-of-use assets	$ 0.3
Increase (decrease) in operating lease liabilities	$ 0.3
Rent expense		$ 24.5	$ 23.2

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration