CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Comprehensive income (loss), net of tax:
Net income (loss)	$ (76,496)		$ 34,992		$ (99,666)		$ (76,532)
Other comprehensive income (loss):
Interest rate swaps	2,112	[1]	(2,263)	[1]	2,533	[1]	(2,161)	[1]
Capitalized swap interest	(318)	[2]	(159)	[2]	(731)	[2]	(569)	[2]
Other comprehensive income (loss)	1,794		(2,422)		1,802		(2,730)
Comprehensive income (loss)	(74,702)		32,570		(97,864)		(79,262)
Comprehensive income attributable to noncontrolling interests	(58)		(682)		(12)		(1,418)
Comprehensive income (loss) attributable to common stockholders	$ (74,760)		$ 31,888		$ (97,876)		$ (80,680)

[1] Net of deferred tax expense of $0.3 million and $0.4 million for the three and six months ended June 30, 2013. Net of deferred tax benefit of $0.3 million and $0.2 million for the three and six months ended June 30, 2012.

[2] Net of deferred tax benefit of $0.2 million and $0.4 million for the three and six months ended June 30, 2013. Net of deferred tax benefit of $0.1 million and $0.3 million for the three and six months ended June 30, 2012.