Supplemental Guarantor Information (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidating statements of other comprehensive income
Net (loss) income	$ 72,245	$ 53,649	$ 231,194	$ 22,117	$ 28,573	$ 10,645	$ 6,272	$ (5,108)	$ 379,205	$ 40,382	$ (50,750)
Other comprehensive loss before tax:
Actuarial loss on defined benefit pension plan									(1,674)	0	0
Reduction of unrealized gain related to cash flow hedging instruments									0	(1,709)	(1,207)
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)									(279)	1,217	360
Less: reclassification adjustments for losses included in net income									64	(233)	(1,358)
Total unrealized (loss) gain on marketable securities, available-for-sale									(215)	984	(998)
Other comprehensive loss before tax									(1,889)	(725)	(2,205)
Income tax benefit related to items of other comprehensive loss									640	653	502
Other comprehensive loss, net of tax									(1,249)	(72)	(1,703)
Comprehensive income (loss)									377,956	40,310	(52,453)
CONSOLIDATING ELIMINATIONS
Consolidating statements of other comprehensive income
Net (loss) income									(161,979)	(24,987)	7,589
Other comprehensive loss before tax:
Actuarial loss on defined benefit pension plan									0
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
Less: reclassification adjustments for losses included in net income									0	0	0
Total unrealized (loss) gain on marketable securities, available-for-sale									0	0	0
Other comprehensive loss before tax									0	0	0
Income tax benefit related to items of other comprehensive loss									0	0	0
Other comprehensive loss, net of tax									0	0	0
Comprehensive income (loss)									(161,979)	(24,987)	7,589
TRG, INC. | Reportable legal entities
Consolidating statements of other comprehensive income
Net (loss) income									379,205	40,382	(50,750)
Other comprehensive loss before tax:
Actuarial loss on defined benefit pension plan									(1,411)
Reduction of unrealized gain related to cash flow hedging instruments										(1,709)	(1,207)
Unrealized gain (loss) on marketable securities, available-for-sale:
Unrealized gain (loss)									(279)	1,217	360
Less: reclassification adjustments for losses included in net income									64	(233)	(1,358)
Total unrealized (loss) gain on marketable securities, available-for-sale									(215)	984	(998)
Other comprehensive loss before tax									(1,626)	(725)	(2,205)
Income tax benefit related to items of other comprehensive loss									540	653	502
Other comprehensive loss, net of tax									(1,086)	(72)	(1,703)
Comprehensive income (loss)									378,119	40,310	(52,453)
GUARANTOR SUBSIDIARIES | Reportable legal entities
Consolidating statements of other comprehensive income
Net (loss) income									123,103	12,319	(12,826)
Other comprehensive loss before tax:
Actuarial loss on defined benefit pension plan									(134)
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
Less: reclassification adjustments for losses included in net income									0	0	0
Total unrealized (loss) gain on marketable securities, available-for-sale									0	0	0
Other comprehensive loss before tax									(134)	0	0
Income tax benefit related to items of other comprehensive loss									51	0	0
Other comprehensive loss, net of tax									(83)	0	0
Comprehensive income (loss)									123,020	12,319	(12,826)
NON-GUARANTOR SUBSIDIARIES | Reportable legal entities
Consolidating statements of other comprehensive income
Net (loss) income									38,876	12,668	5,237
Other comprehensive loss before tax:
Actuarial loss on defined benefit pension plan									(129)
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
Less: reclassification adjustments for losses included in net income									0	0	0
Total unrealized (loss) gain on marketable securities, available-for-sale									0	0	0
Other comprehensive loss before tax									(129)	0	0
Income tax benefit related to items of other comprehensive loss									49	0	0
Other comprehensive loss, net of tax									(80)	0	0
Comprehensive income (loss)									$ 38,796	$ 12,668	$ 5,237