Common and Preferred Stock and Equity of TRG	12 Months Ended
Dec. 31, 2016
Equity [Abstract]
Common and Preferred Stock and Equity of TRG [Text Block]	Common and Preferred Stock and Equity of TRG Common Stock The Company's Board of Directors authorized a share repurchase program under which the Company may repurchase up to $450 million of its outstanding common stock. The Company plans to repurchase shares from time to time on the open market or in privately negotiated transactions or otherwise, depending on market prices and other conditions. No shares were repurchased in 2016. As of December 31, 2016, the Company cumulatively repurchased 4,247,867 shares of its common stock at an average price of $71.79 per share, for a total of $304.9 million under the authorization. As of December 31, 2016, $145.1 million remained available under the repurchase program. All shares repurchased have been cancelled. For each share of the Company’s common stock repurchased, one of the Company’s Operating Partnership units was redeemed. Repurchases of common stock were financed through general corporate funds, including borrowings under existing revolving lines of credit. Preferred Stock The Company is obligated to issue to the noncontrolling partners of TRG, upon subscription, one share of Series B Non-Participating Convertible Preferred Stock (Series B Preferred Stock) for each of the Operating Partnership units held by the noncontrolling partners. Each share of Series B Preferred Stock entitles the holder to one vote on all matters submitted to the Company's shareowners. The holders of Series B Preferred Stock, voting as a class, have the right to designate up to four nominees for election as directors of the Company. On all other matters, including the election of directors, the holders of Series B Preferred Stock will vote with the holders of common stock. The holders of Series B Preferred Stock are not entitled to dividends or earnings of the Company. The Series B Preferred Stock is convertible into common stock at a ratio of 14,000 shares of Series B Preferred Stock for one share of common stock. During the years ended December 31, 2016, 2015, and 2014, 15,880 shares, 72,061 shares, and 35,500 shares of Series B Preferred Stock, respectively, were converted to zero shares, four shares, and one share of the Company’s common stock, respectively, as a result of tenders of units under the Continuing Offer (Note 15).

Common and Preferred Stock and Equity of TRG

Common Stock

The Company's Board of Directors authorized a share repurchase program under which the Company may repurchase up to $450 million of its outstanding common stock. The Company plans to repurchase shares from time to time on the open market or in privately negotiated transactions or otherwise, depending on market prices and other conditions. No shares were repurchased in 2016. As of December 31, 2016, the Company cumulatively repurchased 4,247,867 shares of its common stock at an average price of $71.79 per share, for a total of $304.9 million under the authorization. As of December 31, 2016, $145.1 million remained available under the repurchase program. All shares repurchased have been cancelled. For each share of the Company’s common stock repurchased, one of the Company’s Operating Partnership units was redeemed. Repurchases of common stock were financed through general corporate funds, including borrowings under existing revolving lines of credit.

Preferred Stock

The Company is obligated to issue to the noncontrolling partners of TRG, upon subscription, one share of Series B Non-Participating Convertible Preferred Stock (Series B Preferred Stock) for each of the Operating Partnership units held by the noncontrolling partners. Each share of Series B Preferred Stock entitles the holder to one vote on all matters submitted to the Company's shareowners. The holders of Series B Preferred Stock, voting as a class, have the right to designate up to four nominees for election as directors of the Company. On all other matters, including the election of directors, the holders of Series B Preferred Stock will vote with the holders of common stock. The holders of Series B Preferred Stock are not entitled to dividends or earnings of the Company. The Series B Preferred Stock is convertible into common stock at a ratio of 14,000 shares of Series B Preferred Stock for one share of common stock. During the years ended December 31, 2016, 2015, and 2014, 15,880 shares, 72,061 shares, and 35,500 shares of Series B Preferred Stock, respectively, were converted to zero shares, four shares, and one share of the Company’s common stock, respectively, as a result of tenders of units under the Continuing Offer (Note 15).