Basis of Presentation and Summary of Significant Accounting Policies - Real Estate Held For Sale (Details) € in Thousands	Dec. 31, 2019 EUR (€)
Basis of Presentation and Summary of Significant Accounting Policies
Real Estate Held for Sale Included in Principal Amount of Bonds	€ 25,000

Amount of real estate held for sale included in principal amount of sale.

No definition available.

Name:	srl_RealEstateHeldForSaleIncludedInPrincipalAmountOfBonds
Namespace Prefix:	srl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant