Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income (loss)	$ (39,125)	$ 54,366	$ (16,396)	$ 123,135
Other comprehensive income:
Net unrealized gain (loss) on derivative instruments for interest rate swaps	(1,353)	(2,913)	(126)	(9,253)
Comprehensive income (loss)	(40,478)	51,453	(16,522)	113,882
Comprehensive (income) loss attributable to noncontrolling interest in consolidated joint ventures	181	(311)	418	395
Comprehensive (income) loss attributable to redeemable noncontrolling interest	(2,682)		(3,474)
Comprehensive (income) loss attributable to noncontrolling interest in Operating Partnership	4,436	(5,357)	2,014	(11,976)
Comprehensive income (loss) attributable to common shareholders	(38,543)	45,785	(17,564)	102,301
Mack-Cali Realty LP [Member]
Net income (loss)	(39,125)	54,366	(16,396)	123,135
Other comprehensive income:
Net unrealized gain (loss) on derivative instruments for interest rate swaps	(1,353)	(2,913)	(126)	(9,253)
Comprehensive income (loss)	(40,478)	51,453	(16,522)	113,882
Comprehensive (income) loss attributable to noncontrolling interest in consolidated joint ventures	181	(311)	418	395
Comprehensive (income) loss attributable to redeemable noncontrolling interest	(2,682)		(3,474)
Comprehensive income (loss) attributable to common shareholders	$ (42,979)	$ 51,142	$ (19,578)	$ 114,277