Supplemental Guarantor Information (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidating statements of other comprehensive income
Net income (loss)	$ 231,194	$ 6,272	$ 253,311	$ 1,164
Other comprehensive (loss) income before tax:
Reduction of unrealized gain related to cash flow hedging instruments	0	(301)	0	(603)
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)	(662)	139	(634)	933
Less: reclassification adjustments for gains included in net income (loss)	(189)	(80)	(341)	(13)
Total unrealized (loss) gain on marketable securities, available-for-sale	(851)	59	(975)	920
Other comprehensive (loss) income before tax	(851)	(242)	(975)	317
Income tax benefit related to items of other comprehensive (loss) income	0	115	0	230
Other comprehensive (loss) income, net of tax	(851)	(127)	(975)	547
Comprehensive income	230,343	6,145	252,336	1,711
TRG, INC.
Consolidating statements of other comprehensive income
Net income (loss)	231,194	6,272	253,311	1,164
Other comprehensive (loss) income before tax:
Reduction of unrealized gain related to cash flow hedging instruments		(301)		(603)
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)	(662)	139	(634)	933
Less: reclassification adjustments for gains included in net income (loss)	(189)	(80)	(341)	(13)
Total unrealized (loss) gain on marketable securities, available-for-sale		59		920
Other comprehensive (loss) income before tax	(851)	(242)	(975)	317
Income tax benefit related to items of other comprehensive (loss) income	0	115	0	230
Other comprehensive (loss) income, net of tax	(851)	(127)	(975)	547
Comprehensive income	230,343	6,145	252,336	1,711
GUARANTOR SUBSIDIARIES
Consolidating statements of other comprehensive income
Net income (loss)	102,450	576	110,743	(2,586)
Other comprehensive (loss) income before tax:
Reduction of unrealized gain related to cash flow hedging instruments		0		0
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)	0	0	0	0
Less: reclassification adjustments for gains included in net income (loss)	0	0	0	0
Total unrealized (loss) gain on marketable securities, available-for-sale		0		0
Other comprehensive (loss) income before tax	0	0	0	0
Income tax benefit related to items of other comprehensive (loss) income	0	0	0	0
Other comprehensive (loss) income, net of tax	0	0	0	0
Comprehensive income	102,450	576	110,743	(2,586)
NON-GUARANTOR SUBSIDIARIES
Consolidating statements of other comprehensive income
Net income (loss)	7,536	2,732	11,818	3,377
Other comprehensive (loss) income before tax:
Reduction of unrealized gain related to cash flow hedging instruments		0		0
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)	0	0	0	0
Less: reclassification adjustments for gains included in net income (loss)	0	0	0	0
Total unrealized (loss) gain on marketable securities, available-for-sale		0		0
Other comprehensive (loss) income before tax	0	0	0	0
Income tax benefit related to items of other comprehensive (loss) income	0	0	0	0
Other comprehensive (loss) income, net of tax	0	0	0	0
Comprehensive income	7,536	2,732	11,818	3,377
CONSOLIDATING ELIMINATIONS
Consolidating statements of other comprehensive income
Net income (loss)	(109,986)	(3,308)	(122,561)	(791)
Other comprehensive (loss) income before tax:
Reduction of unrealized gain related to cash flow hedging instruments		0		0
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)	0	0	0	0
Less: reclassification adjustments for gains included in net income (loss)	0	0	0	0
Total unrealized (loss) gain on marketable securities, available-for-sale		0		0
Other comprehensive (loss) income before tax	0	0	0	0
Income tax benefit related to items of other comprehensive (loss) income	0	0	0	0
Other comprehensive (loss) income, net of tax	0	0	0	0
Comprehensive income	$ (109,986)	$ (3,308)	$ (122,561)	$ (791)