Earnings Per Share - Summary of Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Numerator:
Net income (loss) attributable to Paramount Group, Inc. - basic and diluted	$ 1,116	$ (13,324)
Denominator:
Denominator for basic income (loss) per share - weighted average shares	212,106,718	212,106,718
Effect of dilutive employee stock options and restricted share awards	1,000
Denominator for diluted income (loss) per share - weighted average shares	212,108,079	212,106,718
Income (loss) per share - basic and diluted	$ 0.01	$ (0.06)