Supplemental Guarantor Information (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidating statements of other comprehensive income
Net income	$ 53,649	$ 10,645	$ 306,960	$ 11,809
Other comprehensive income (loss) before tax:
Reduction of unrealized gain related to cash flow hedging instruments	0	(1,106)	0	(1,709)
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)	433	225	(201)	1,158
Less: reclassification adjustments for losses (gains) included in net income	253	(9)	(88)	(22)
Total unrealized gain (loss) on marketable securities, available-for-sale	686	216	(289)	1,136
Other comprehensive income (loss) before tax	686	(890)	(289)	(573)
Income tax benefit related to items of other comprehensive income (loss)	0	423	0	653
Other comprehensive income (loss), net of tax	686	(467)	(289)	80
Comprehensive income	54,335	10,178	306,671	11,889
CONSOLIDATING ELIMINATIONS
Consolidating statements of other comprehensive income
Net income	(25,826)	(12,759)	(148,387)	(13,550)
Other comprehensive income (loss) 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 losses (gains) included in net income	0	0	0	0
Total unrealized gain (loss) on marketable securities, available-for-sale		0		0
Other comprehensive income (loss) before tax	0	0	0	0
Income tax benefit related to items of other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income	(25,826)	(12,759)	(148,387)	(13,550)
TRG, INC. | Reportable legal entities
Consolidating statements of other comprehensive income
Net income	53,649	10,645	306,960	11,809
Other comprehensive income (loss) before tax:
Reduction of unrealized gain related to cash flow hedging instruments		(1,106)		(1,709)
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)	433	225	(201)	1,158
Less: reclassification adjustments for losses (gains) included in net income	253	(9)	(88)	(22)
Total unrealized gain (loss) on marketable securities, available-for-sale		216		1,136
Other comprehensive income (loss) before tax	686	(890)	(289)	(573)
Income tax benefit related to items of other comprehensive income (loss)	0	423	0	653
Other comprehensive income (loss), net of tax	686	(467)	(289)	80
Comprehensive income	54,335	10,178	306,671	11,889
GUARANTOR SUBSIDIARIES | Reportable legal entities
Consolidating statements of other comprehensive income
Net income	19,851	9,270	130,594	6,684
Other comprehensive income (loss) 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 losses (gains) included in net income	0	0	0	0
Total unrealized gain (loss) on marketable securities, available-for-sale		0		0
Other comprehensive income (loss) before tax	0	0	0	0
Income tax benefit related to items of other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income	19,851	9,270	130,594	6,684
NON-GUARANTOR SUBSIDIARIES | Reportable legal entities
Consolidating statements of other comprehensive income
Net income	5,975	3,489	17,793	6,866
Other comprehensive income (loss) 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 losses (gains) included in net income	0	0	0	0
Total unrealized gain (loss) on marketable securities, available-for-sale		0		0
Other comprehensive income (loss) before tax	0	0	0	0
Income tax benefit related to items of other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income	$ 5,975	$ 3,489	$ 17,793	$ 6,866