Stockholders' Equity - Schedule of Primary Components of Accumulated Other Comprehensive Loss (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Accumulated Other Comprehensive Loss [Line Items]
Unrealized gain on derivative financial instruments	$ 1,965	$ 3,749
Ineffective portion of cash flow hedges		2,481
Amortization of net unrealized gains on securities	(8)	(765)
Amortization of net deferred gains on settlement of swaps		56
Mark-to Market on Interest Rate Hedges [Member]
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning		(27,423)
Unrealized gain on derivative financial instruments		3,749
Ineffective portion of cash flow hedges		2,481
Amortization of net unrealized gains on securities
Amortization of net deferred gains on settlement of swaps
Other-than-temporary impairments of securities
Deconsolidation of CT Legacy Assets
Balance, ending	(21,193)	(21,193)
Accumulated other comprehensive loss as of June 30, 2012	(21,193)	(21,193)
Deferred Gains on Settled Hedges [Member]
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning		56
Unrealized gain on derivative financial instruments
Ineffective portion of cash flow hedges
Amortization of net unrealized gains on securities
Amortization of net deferred gains on settlement of swaps		(56)
Other-than-temporary impairments of securities
Deconsolidation of CT Legacy Assets
Balance, ending
Accumulated other comprehensive loss as of June 30, 2012
Other than Temporary Impairments [Member]
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning		(16,578)
Unrealized gain on derivative financial instruments
Ineffective portion of cash flow hedges
Amortization of net unrealized gains on securities
Amortization of net deferred gains on settlement of swaps
Other-than-temporary impairments of securities		203
Deconsolidation of CT Legacy Assets		3,879
Balance, ending	(12,496)	(12,496)
Accumulated other comprehensive loss as of June 30, 2012	(12,496)	(12,496)
Unrealized Gains on Securities [Member]
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning		3,361
Unrealized gain on derivative financial instruments
Ineffective portion of cash flow hedges
Amortization of net unrealized gains on securities		(765)
Amortization of net deferred gains on settlement of swaps
Other-than-temporary impairments of securities
Deconsolidation of CT Legacy Assets		(2,586)
Balance, ending	10	10
Accumulated other comprehensive loss as of June 30, 2012	10	10
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning		(40,584)
Unrealized gain on derivative financial instruments		3,749
Ineffective portion of cash flow hedges		2,481
Amortization of net unrealized gains on securities		(765)
Amortization of net deferred gains on settlement of swaps		(56)
Other-than-temporary impairments of securities		203
Deconsolidation of CT Legacy Assets		1,293
Balance, ending	(33,679)	(33,679)
Allocation to non-controlling interest
Accumulated other comprehensive loss as of June 30, 2012	$ (33,679)	$ (33,679)