Commitments and Contingencies (Details) (SL Green, USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
SL Green
Commitments and Contingencies
Cash-based compensation	$ 4.5
Grant date value of deferred compensation awards		$ 1.0

Represents the grant date value based on the entity's stock price of deferred compensation awards granted under agreements.

No definition available.

Name:	slgop_DeferredCompensationAwardsGrantDateValue
Namespace Prefix:	slgop_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant