Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income (loss)	$ (56,021)	$ 1,689	$ 199,244	$ 53,878
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments for interest rate swaps	(878)	354	(9,953)	7,287
Comprehensive income (loss)	(56,899)	2,043	189,291	61,165
Comprehensive (income) loss attributable to noncontrolling interests in consolidated joint ventures	405	451	2,500	576
Comprehensive (income) loss attributable to redeemable noncontrolling interests	(6,471)	(3,785)	(16,144)	(9,573)
Comprehensive (income) loss attributable to noncontrolling interests in Operating Partnership	6,246	131	(18,127)	(5,316)
Comprehensive income (loss) attributable to common shareholders	(56,719)	(1,160)	157,520	46,852
Mack-Cali Realty LP [Member]
Net income (loss)	(56,021)	1,689	199,244	53,878
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments for interest rate swaps	(878)	354	(9,953)	7,287
Comprehensive income (loss)	(56,899)	2,043	189,291	61,165
Comprehensive (income) loss attributable to noncontrolling interests in consolidated joint ventures	405	451	2,500	576
Comprehensive (income) loss attributable to redeemable noncontrolling interests	(6,471)	(3,785)	(16,144)	(9,573)
Comprehensive income (loss) attributable to common shareholders	$ (62,965)	$ (1,291)	$ 175,647	$ 52,168