Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Rental revenue, net	$ 621,121	$ 574,150	$ 535,969
Escalation and reimbursement	95,894	92,850	86,366
Investment income	182,648	176,901	194,612
Other income	25,570	3,621	4,875
Total revenues	925,233	847,522	821,822
Expenses
Operating expenses, including $26,728 in 2015, $25,094 in 2014, and $24,302 in 2013 of related party expenses	163,969	154,374	146,548
Real estate taxes	143,873	133,567	118,699
Ground rent	20,941	20,941	21,139
Interest expense, net of interest income	119,342	129,356	133,845
Amortization of deferred financing costs	7,519	7,810	8,460
Depreciation and amortization	202,474	196,505	181,619
Transaction related costs	2,871	3,599	3,070
Marketing, general and administrative	464	372	362
Total expenses	661,453	646,524	613,742
Income from continuing operations before equity in net income (loss) from unconsolidated joint ventures, equity in net gain on sale of interest in unconsolidated joint venture, gain on sale of real estate, depreciable real estate reserves and loss on early extinguishment of debt	263,780	200,998	208,080
Equity in net income (loss) from unconsolidated joint ventures	8,841	4,491	(17,108)
Equity in net gain on sale of interest in unconsolidated joint venture	0	85,559	2,056
Gain on sale of real estate	100,190	0	0
Depreciable real estate reserves	(9,998)	0	0
Loss on early extinguishment of debt	(49)	(7,385)	(76)
Income from continuing operations	362,764	283,663	192,952
Net income from discontinued operations	0	1,996	5,907
Gain on sale of discontinued operations	0	117,579	13,756
Net income	362,764	403,238	212,615
Net income attributable to noncontrolling interests in other partnerships	(9,169)	(2,641)	(5,200)
Preferred units dividend	(1,698)	0	0
Net income attributable to ROP common unitholder	351,897	400,597	207,415
Amounts attributable to ROP common unitholder:
Income from continuing operations	351,897	281,022	187,752
Discontinued operations	$ 0	$ 119,575	$ 19,663