Decommissioning Obligations - Additional Information (Details))	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Decommissioning Obligations
Decommissioning obligations using an average discount rate	1.61%	1.98%

Average discount rate percentage of decommissioning obligations.

No definition available.

Name:	srl_DecommissioningObligationsAverageDiscountRate
Namespace Prefix:	srl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration