Stockholders' Equity - Share Repurchase Program (Narrative) (Details)	12 Months Ended
Dec. 31, 2016
Stockholders' Equity Note [Abstract]
Threshold period to repurchase shares (less than)	1 year

Represents the minimum holding period of shares for stockholders to be eligible for repurchase under the share repurchase program.

No definition available.

Name:	rxr_ShareRepurchaseProgramHoldingPeriodOfSharesRequiredForRepurchase
Namespace Prefix:	rxr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration