Corporate Indebtedness (Details) - USD ($)	3 Months Ended
Corporate Indebtedness (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Corporate Indebtedness
Carrying value	$ 2,917,642,000
Debt disclosures by scheduled maturity date
Accreted Balance	1,179,861,000		$ 1,179,521,000
Scheduled amortization and principal repayments
Remaining 2017	0
2018	434,642,000
2019	1,183,000,000
2020	250,000,000
2021	0
Thereafter	1,050,000,000
Total amortization of debt and principal repayments	2,917,642,000
Interest expense
Interest expense	29,851,000	$ 32,314,000
Interest capitalized	(380,000)	(109,000)
Interest income	(4,000)	(4,000)
Interest expense, net	29,467,000	$ 32,201,000
Senior Unsecured Notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	800,000,000
Accreted Balance	799,898,000		799,880,000
Deferred financing costs, net	(4,296,000)		(4,620,000)
Total	795,602,000		795,260,000
Revolving credit facility
Corporate Indebtedness
Maximum borrowing capacity	1,600,000,000.0
Maximum borrowing capacity, optional expansion	$ 3,000,000,000
Facility fee on total commitments, payable quarterly in arrears (as a percent)	0.25%
Revolving credit facility, net	$ 0
Carrying value	$ 0
Debt disclosures by scheduled maturity date
Effective Rate (as a percent)	2.03%
Scheduled amortization and principal repayments
Remaining 2017	$ 0
2018	0
2019	0
2020	0
2021	0
Thereafter	0
Total amortization of debt and principal repayments	$ 0
Revolving credit facility \| Minimum
Corporate Indebtedness
Facility fee on total commitments, payable quarterly in arrears (as a percent)	0.125%
Revolving credit facility \| Maximum
Corporate Indebtedness
Facility fee on total commitments, payable quarterly in arrears (as a percent)	0.30%
Revolving credit facility \| LIBOR
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.25%
Revolving credit facility \| LIBOR \| Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.875%
Revolving credit facility \| LIBOR \| Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.55%
Term loan
Corporate Indebtedness
Maximum borrowing capacity	$ 1,183,000,000.0
Carrying value	$ 1,183,000,000
Debt disclosures by scheduled maturity date
Effective Rate (as a percent)	2.18%
Scheduled amortization and principal repayments
Remaining 2017	$ 0
2018	0
2019	1,183,000,000
2020	0
2021	0
Thereafter	0
Total amortization of debt and principal repayments	1,183,000,000
Term loan \| Line of Credit
Corporate Indebtedness
Carrying value	1,200,000,000		1,200,000,000
Scheduled amortization and principal repayments
Total amortization of debt and principal repayments	$ 1,200,000,000		1,200,000,000
Term loan \| LIBOR
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.40%
Term loan \| LIBOR \| Minimum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	0.95%
Term loan \| LIBOR \| Maximum
Corporate Indebtedness
Interest rate added to base rate (as a percent)	1.90%
Credit Facility 2012
Corporate Indebtedness
Letters of credit	$ 84,800,000
Ability to borrow under line of credit facility	1,500,000,000
Credit Facility 2012 \| Line of Credit
Corporate Indebtedness
Carrying value	(5,600,000)		(6,300,000)
Scheduled amortization and principal repayments
Total amortization of debt and principal repayments	(5,600,000)		(6,300,000)
5.00% senior unsecured notes maturing on August 15, 2018 \| Senior Unsecured Notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	250,000,000
Accreted Balance	$ 249,898,000		249,880,000
Coupon Rate (as a percent)	5.00%
Effective Rate (as a percent)	5.00%
Term (in Years)	7 years
7.75% senior unsecured notes maturing on March 15, 2020 \| Senior Unsecured Notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	$ 250,000,000
Accreted Balance	$ 250,000,000		250,000,000
Coupon Rate (as a percent)	7.75%
Effective Rate (as a percent)	7.75%
Term (in Years)	10 years
4.50% senior unsecured notes maturing on December 01, 2022 \| Senior Unsecured Notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	$ 200,000,000
Accreted Balance	$ 200,000,000		200,000,000
Coupon Rate (as a percent)	4.50%
Effective Rate (as a percent)	4.50%
Term (in Years)	10 years
4.27% senior unsecured notes maturing December 17, 2025 \| Senior Unsecured Notes
Debt disclosures by scheduled maturity date
Unpaid Principal Balance	$ 100,000,000
Accreted Balance	$ 100,000,000		$ 100,000,000
Coupon Rate (as a percent)	4.27%
Effective Rate (as a percent)	4.27%
Term (in Years)	10 years
Exchangeable Senior Notes Due 2017 \| Senior Unsecured Notes
Debt disclosures by scheduled maturity date
Coupon Rate (as a percent)	3.00%
Mortgage and Other Loans Payable
Scheduled Amortization
Remaining 2017	$ 0
2018	0
2019	0
2020	0
2021	0
Thereafter	0
Total amortization of debt	0
Principal Repayments
Remaining 2017	0
2018	184,642,000
2019	0
2020	0
2021	0
Thereafter	750,000,000
Total principal repayments	934,642,000
Senior Unsecured Notes
Corporate Indebtedness
Carrying value	800,000,000
Scheduled amortization and principal repayments
Remaining 2017	0
2018	250,000,000
2019	0
2020	250,000,000
2021	0
Thereafter	300,000,000
Total amortization of debt and principal repayments	$ 800,000,000

RECKSON OPERATING PARTNERSHIP LP 10-Q