Subsequent Events d (Details)		3 Months Ended
	May 06, 2020 USD ($)	Mar. 31, 2020	Sep. 28, 2018 USD ($)
First Amendment | Subsequent Event
Subsequent Event [Line Items]
Maximum unsecured indebtedness	$ 350,000,000
Revolving Credit Facility | Citibank, N.A.
Subsequent Event [Line Items]
Credit facility borrowing capacity			$ 400,000,000
Revolving Credit Facility | First Amendment | Citibank, N.A.
Subsequent Event [Line Items]
Maximum net leverage ratio		3.5
Revolving Credit Facility | First Amendment | Citibank, N.A. | Subsequent Event
Subsequent Event [Line Items]
Maximum net leverage ratio	6.0
Credit facility borrowing capacity	$ 325,000,000