General (Details) - USD ($)	1 Months Ended		9 Months Ended
General (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2014	Sep. 30, 2017	Oct. 01, 2017	May 02, 2017	Dec. 31, 2016	Jun. 30, 2015	Dec. 29, 2014
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Distribution made upon execution of limited partnership agreement by BFP/JMB, BFP, LP to 245 Park Holdings		$ 2,530,000
Distribution made by 245 Park Holding to JMB/245 Park Avenue Associates, Ltd.		2,500,000
Distribution made by 245 Park Holdings to BFP Property GP Corp.		300,000
Amount of capital contribution and investment for Class J shares deemed to have been made by 245 Park Holdings		$ 7,500,000
Class J shares accrued cumulative annual preferred return rate		5.00%
Additional payment that can be triggered with respect to a redemption on or following December 29, 2016 and prior to December 29, 2017	$ 3,939,394		$ 3,939,394
Additional payment that can be triggered with respect to a redemption on or following December 29, 2017 and prior to December 29, 2018	2,626,263		2,626,263
Additional payment that can be triggered with respect to a redemption on or following December 29, 2018 and prior to December 29, 2019	1,313,131		1,313,131
Additional payment that can be triggered with respect to a redemption on or following December 29, 2019
Number of Class J units redeemed per Partnership Agreement					7,481,180
Value of Class J units redeemed per Partnership Agreement					$ 7,481,180
Additional redemption amount received by Partnership from Class J units					3,939,394
Total redemption amount received by Partnership from Class J units					$ 11,420,574
Partnership distribution per unit	$ 2,500		$ 2,500
Reserve for estimated tax payments	$ 237,022		$ 237,022
Payment of estimated taxes to the state of New York recorded as distribution	$ 725,205
Subsequent Event [Member] \| Scenario, Forecast [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Partnership distribution per unit				$ 2,000
Brookfield Financial Properties, L.P. [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
General partner, ownership interest			0.50%
Number of units owned by general partnership							567.375
Partnership ownership percentage member							99.00%
Percentage of ownership in BFP 245 Park Co., LLC, transferred by Brookfield Financial Properties, L.P. to BFP-JMB 245, L.P., a Delaware limited partnership								48.50%

JMB 245 PARK AVENUE ASSOCIATES LTD 10-Q