Supplemental Guarantor Information (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income from continuing operations	$ 6,049		$ (9,801)		$ 3,028		$ (27,240)
Adjustments to reconcile net (loss) income from continuing operations to net cash (used for) provided by operating activities					13,373		36,070
Changes in assets and liabilities					(70,740)		(103,816)
Other operating activities, net					(784)		(371)
Net cash used for operating activities from continuing operations					(55,123)		(95,357)
CASH FLOWS FROM INVESTING ACTIVITIES
(Contributions to) return of investment in unconsolidated joint ventures, net					1,871		1,062
Additions to property, plant and equipment					(5,434)		(5,595)
Purchases of marketable securities, available-for-sale					(469,690)		(700,135)
Proceeds from sales and maturities of marketable securities, available-for-sale					508,687		780,594
Other investing activities, net					(10)		30
Net cash provided by investing activities from continuing operations					35,424		75,956
CASH FLOWS FROM FINANCING ACTIVITIES
Increase (decrease) in debt					223,721		(28,443)
Increase in borrowings against revolving credit facilities, net					338
Common stock dividends and stock-based compensation					1,750		829
(Increase) decrease in restricted cash					(10,261)		2,691
Intercompany balances					0		0
Net cash provided by (used for) financing activities from continuing operations					215,548		(24,923)
Net increase (decrease) in cash and cash equivalents from continuing operations					195,849		(44,324)
Cash flows from operating activities-discontinued operations					363		341
Cash flows from investing activities-discontinued operations					79		(316)
Cash flows from financing activities-discontinued operations					0		0
Cash and cash equivalents at beginning of period					159,419	[1]	226,647	[1]
CASH AND CASH EQUIVALENTS AT END OF PERIOD	355,710	[2]	182,348	[2]	355,710	[2]	182,348	[2]
TRG, INC.
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income from continuing operations	6,049		(9,801)		3,028		(27,240)
Adjustments to reconcile net (loss) income from continuing operations to net cash (used for) provided by operating activities					8,687		31,864
Changes in assets and liabilities					(70,561)		(48,919)
Other operating activities, net					(784)		(158)
Net cash used for operating activities from continuing operations					(59,630)		(44,453)
CASH FLOWS FROM INVESTING ACTIVITIES
(Contributions to) return of investment in unconsolidated joint ventures, net					539		(453)
Additions to property, plant and equipment					(3,503)		(3,483)
Purchases of marketable securities, available-for-sale					(468,012)		(697,208)
Proceeds from sales and maturities of marketable securities, available-for-sale					506,783		778,063
Other investing activities, net					0		0
Net cash provided by investing activities from continuing operations					35,807		76,919
CASH FLOWS FROM FINANCING ACTIVITIES
Increase (decrease) in debt					224,909		(28,160)
Increase in borrowings against revolving credit facilities, net					0
Common stock dividends and stock-based compensation					1,750		829
(Increase) decrease in restricted cash					(14,175)		3,197
Intercompany balances					(194,164)		(35,068)
Net cash provided by (used for) financing activities from continuing operations					18,320		(59,202)
Net increase (decrease) in cash and cash equivalents from continuing operations					(5,503)		(26,736)
Cash flows from operating activities-discontinued operations					436		191
Cash flows from investing activities-discontinued operations					6		(166)
Cash flows from financing activities-discontinued operations					0		0
Cash and cash equivalents at beginning of period					25,430		26,711
CASH AND CASH EQUIVALENTS AT END OF PERIOD	20,369		0		20,369		0
GUARANTOR SUBSIDIARIES
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income from continuing operations	441		(192)		(1,745)		(5,216)
Adjustments to reconcile net (loss) income from continuing operations to net cash (used for) provided by operating activities					4,418		3,882
Changes in assets and liabilities					(13,597)		(46,436)
Other operating activities, net					0		(213)
Net cash used for operating activities from continuing operations					(10,924)		(47,983)
CASH FLOWS FROM INVESTING ACTIVITIES
(Contributions to) return of investment in unconsolidated joint ventures, net					1,332		1,515
Additions to property, plant and equipment					(1,915)		(2,057)
Purchases of marketable securities, available-for-sale					0		0
Proceeds from sales and maturities of marketable securities, available-for-sale					0		0
Other investing activities, net					0		0
Net cash provided by investing activities from continuing operations					(583)		(542)
CASH FLOWS FROM FINANCING ACTIVITIES
Increase (decrease) in debt					(1,188)		(283)
Increase in borrowings against revolving credit facilities, net					0
Common stock dividends and stock-based compensation					0		0
(Increase) decrease in restricted cash					0		0
Intercompany balances					210,429		36,811
Net cash provided by (used for) financing activities from continuing operations					209,241		36,528
Net increase (decrease) in cash and cash equivalents from continuing operations					197,734		(11,997)
Cash flows from operating activities-discontinued operations					(73)		150
Cash flows from investing activities-discontinued operations					73		(150)
Cash flows from financing activities-discontinued operations					0		0
Cash and cash equivalents at beginning of period					117,101		177,191
CASH AND CASH EQUIVALENTS AT END OF PERIOD	314,835		165,194		314,835		165,194
NON-GUARANTOR SUBSIDIARIES
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income from continuing operations	2,732		1,956		3,377		3,033
Adjustments to reconcile net (loss) income from continuing operations to net cash (used for) provided by operating activities					268		324
Changes in assets and liabilities					11,786		(6,278)
Other operating activities, net					0		0
Net cash used for operating activities from continuing operations					15,431		(2,921)
CASH FLOWS FROM INVESTING ACTIVITIES
(Contributions to) return of investment in unconsolidated joint ventures, net					0		0
Additions to property, plant and equipment					(16)		(55)
Purchases of marketable securities, available-for-sale					(1,678)		(2,927)
Proceeds from sales and maturities of marketable securities, available-for-sale					1,904		2,531
Other investing activities, net					(10)		30
Net cash provided by investing activities from continuing operations					200		(421)
CASH FLOWS FROM FINANCING ACTIVITIES
Increase (decrease) in debt					0		0
Increase in borrowings against revolving credit facilities, net					338
Common stock dividends and stock-based compensation					0		0
(Increase) decrease in restricted cash					3,914		(506)
Intercompany balances					(16,265)		(1,743)
Net cash provided by (used for) financing activities from continuing operations					(12,013)		(2,249)
Net increase (decrease) in cash and cash equivalents from continuing operations					3,618		(5,591)
Cash flows from operating activities-discontinued operations					0		0
Cash flows from investing activities-discontinued operations					0		0
Cash flows from financing activities-discontinued operations					0		0
Cash and cash equivalents at beginning of period					16,888		22,745
CASH AND CASH EQUIVALENTS AT END OF PERIOD	20,506		17,154		20,506		17,154
CONSOLIDATING ELIMINATIONS
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income from continuing operations	(3,173)		(1,764)		(1,632)		2,183
Adjustments to reconcile net (loss) income from continuing operations to net cash (used for) provided by operating activities					0		0
Changes in assets and liabilities					1,632		(2,183)
Other operating activities, net					0		0
Net cash used for operating activities from continuing operations					0		0
CASH FLOWS FROM INVESTING ACTIVITIES
(Contributions to) return of investment in unconsolidated joint ventures, net					0		0
Additions to property, plant and equipment					0		0
Purchases of marketable securities, available-for-sale					0		0
Proceeds from sales and maturities of marketable securities, available-for-sale					0		0
Other investing activities, net					0		0
Net cash provided by investing activities from continuing operations					0		0
CASH FLOWS FROM FINANCING ACTIVITIES
Increase (decrease) in debt					0		0
Increase in borrowings against revolving credit facilities, net					0
Common stock dividends and stock-based compensation					0		0
(Increase) decrease in restricted cash					0		0
Intercompany balances					0		0
Net cash provided by (used for) financing activities from continuing operations					0		0
Net increase (decrease) in cash and cash equivalents from continuing operations					0		0
Cash flows from operating activities-discontinued operations					0		0
Cash flows from investing activities-discontinued operations					0		0
Cash flows from financing activities-discontinued operations					0		0
Cash and cash equivalents at beginning of period					0		0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 0		$ 0		$ 0		$ 0

[1] Includes cash and cash equivalents of $56,000 and $39,000 associated with discontinued operations at December 31, 2011 and 2010, respectively.

[2] Includes cash and cash equivalents of $498,000 and $64,000 associated with discontinued operations at June 30, 2012 and 2011, respectively.