Partners' Capital of the Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Unit

The Operating Partnership's earnings per unit for the years ended December 31, 2020, 2019, and 2018 respectively are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2020		2019		2018
Basic Earnings:
Income attributable to SLGOP common unitholders	$	376,121	$	268,785	$	244,528
Less: distributed earnings allocated to participating securities	(1,687)		$	(1,702)	$	(1,042)
Less: undistributed earnings allocated to participating securities	(83)		—		—
Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit)	$	374,351	$	267,083	$	243,486
Add back: Dilutive effect of earnings allocated to participating securities	1,770		1,702		1,042
Income attributable to SLGOP common unitholders	$	376,121	$	268,785	$	244,528

	Year Ended December 31,
Denominator	2020	2019	2018
Basic units:
Weighted average common units outstanding	76,647	83,690	88,652
Effect of Dilutive Securities:
Stock-based compensation plans	441	544	419
Contingently issuable units from special dividend declared December 4, 2020	155	—	—
Diluted weighted average common units outstanding	77,243	84,234	89,071