Stockholders' Equity of the Company (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

Class of Treasury Stock

At December 31, 2019 repurchases executed under the program 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
Year ended 2018	9,744,911	$96.22	18,087,322
Year ended 2019	4,596,171	$83.62	22,683,493

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, 2019, 2018, and 2017, respectively (dollars in thousands):

	Year Ended December 31,
	2019		2018		2017
Shares of common stock issued	3,867		1,399		2,141
Dividend reinvestments/stock purchases under the DRSPP	$	334	$	136	$	223

Schedule of Earnings Per Share

SL Green's earnings per share for the years ended December 31, 2019, 2018, and 2017 are computed as follows (in thousands):

	Year Ended December 31,
Numerator	2019			2018			2017
Basic Earnings:
Income attributable to SL Green common stockholders	$	255,484		$	232,312		$	86,424
Less: distributed earnings allocated to participating securities	(1,739		)	$	(552	)	$	(471	)
Net income attributable to SL Green common stockholders (numerator for basic earnings per share)	$	253,745		$	231,760		$	85,953
Add back: Dilutive effect of earnings allocated to participating securities	1,719			552			471
Add back: Effect of dilutive securities (redemption of units to common shares)	13,301			12,216			3,995
Income attributable to SL Green common stockholders (numerator for diluted earnings per share)	$	268,765		$	244,528		$	90,419

	Year Ended December 31,
Denominator	2019	2018	2017
Basic Shares:
Weighted average common stock outstanding	81,733	86,753	98,571
Effect of Dilutive Securities:
Operating Partnership units redeemable for common shares	4,275	4,562	4,556
Stock-based compensation plans	554	215	276
Diluted weighted average common stock outstanding	86,562	91,530	103,403