Long-Term Debt - 2019 Mortgage Facility (Details)	Sep. 30, 2020 $ / shares
6.125% Notes
Debt Instrument [Line Items]
Maximum dividend (usd per share)	$ 0.12
2019 Mortgage Facility [Member]
Debt Instrument [Line Items]
Maximum dividend (usd per share)	$ 0.10

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration