Stockholders' Equity of the Company (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Class of Treasury Stock

At December 31, 2018 repurchases executed under the plan were as follows:

Period	Shares repurchased	Average price paid per share	Cumulative number of shares repurchased as part of the repurchase plan or programs
Year ended 2017	8,342,411	$101.64	8,342,411
First quarter 2018	3,653,928	$97.07	11,996,339
Second quarter 2018	3,479,552	$97.22	15,475,891
Third quarter 2018	252,947	$99.75	15,728,838
Fourth quarter 2018	2,358,484	$93.04	18,087,322

Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments

The following table summarizes SL Green common stock issued, and proceeds received from dividend reinvestments and/or stock purchases under the DRSPP for the years ended December 31, 2018, 2017, and 2016, respectively (dollars in thousands):

	Year Ended December 31,
	2018		2017		2016
Shares of common stock issued	1,399		2,141		2,687
Dividend reinvestments/stock purchases under the DRSPP	$	136	$	223	$	277

Schedule of Earnings Per Share

SL Green's earnings per share for the years ended December 31, 2018, 2017, and 2016 are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SL Green common stockholders	$	232,312		$	86,424		$	234,946
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)	$	231,760		$	85,953		$	234,312
Add back: undistributed earnings allocated to participating securities	552			471			634
Add back: Effect of dilutive securities (redemption of units to common shares)	12,216			3,995			10,136
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic Shares:
Weighted average common stock outstanding	86,753	98,571	100,185
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares	4,562	4,556	4,323
Stock-based compensation plans	215	276	373
Diluted weighted average common stock outstanding	91,530	103,403	104,881

The Operating Partnership's earnings per unit for the years ended December 31, 2018, 2017, and 2016 respectively are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2018			2017			2016
Basic Earnings:
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082
Less: distributed earnings allocated to participating securities	(552		)	$	(471	)	$	(634	)
Net Income attributable to SLGOP common unitholders (numerator for basic earnings per unit)	$	243,976		$	89,948		$	244,448
Add back: undistributed earnings allocated to participating securities	552			471			634
Income attributable to SLGOP common unitholders	$	244,528		$	90,419		$	245,082

	Year Ended December 31,
Denominator	2018	2017	2016
Basic units:
Weighted average common units outstanding	91,315	103,127	104,508
Effect of Dilutive Securities:
Stock-based compensation plans	215	276	373
Diluted weighted average common units outstanding	91,530	103,403	104,881