Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Unit Tables - Basic Computation Of EPU) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Mack-Cali Realty, L.P.'s Partners' Capital [Abstract]
Net income (loss)	$ 68,769	$ (3,325)
Add: Noncontrolling interest in consolidated joint ventures	706	490
Net income (loss) available to common unitholders	$ 69,475	$ (2,835)
Weighted average common units	100,230	100,266
Net income (loss) available to common unitholders	$ 0.69	$ (0.03)