CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows from Operating Activities
Net loss	$ (68,175)	$ (48,901)	$ (66,255)
Adjustments to reconcile net loss to net cash provided by operating activities:
Loss on extinguishment of debt	18,863	1,557	1,292
Depreciation and amortization	281,933	301,304	281,440
Asset impairment	16,892	13,075	10,073
Gain on sale of assets and unconsolidated ventures	(1,180)	(2,509)	(2,241)
Equity in earnings of unconsolidated ventures	(1,432)	(168)	(440)
Distributions from unconsolidated ventures from cumulative share of net earnings	1,282	775	405
Amortization of deferred gain	(4,373)	(4,343)	(4,345)
Amortization of entrance fees	(25,401)	(24,397)	(21,661)
Proceeds from deferred entrance fee revenue	38,378	37,486	38,489
Deferred income tax provision (benefit)	943	(33,295)	(31,684)
Change in deferred lease liability	8,608	10,521	15,851
Change in fair value of derivatives and amortization	3,878	4,118	(3,765)
Gain on acquisition	(1,982)	0	0
Lessor cash reimbursement for tenant incentive	1,251	0	0
Change in future service obligation	0	(1,064)	(2,342)
Non-cash stock-based compensation	19,856	20,759	26,935
Changes in operating assets and liabilities:
Accounts receivable, net	(5,367)	(7,956)	11,784
Prepaid expenses and other assets, net	(22,934)	(22,050)	(28,426)
Accounts payable and accrued expenses	13,721	(11,775)	21,287
Tenant refundable fees and security deposits	(2,186)	(3,158)	(16,770)
Deferred revenue	(4,148)	(1,735)	7,593
Net cash provided by operating activities	268,427	228,244	237,220
Cash Flows from Investing Activities
(Increase) decrease in lease security deposits and lease acquisition deposits, net	(3,088)	(2,175)	2,441
Decrease (increase) in cash and escrow deposits - restricted	56,176	4,705	(64,540)
Net proceeds from sale of assets	30,817	12,079	14,941
Additions to property, plant and equipment, and leasehold intangibles, net of related payables	(160,131)	(93,681)	(117,453)
Purchase of marketable securities - restricted	(32,724)	0	0
Sale of marketable securities - restricted	1,431	0	0
Acquisition of assets, net of related payables and cash received	(88,682)	(57,948)	(204,137)
Purchase of Horizon Bay Realty, L.L.C., net of cash acquired	5,516	0	0
Payments on (issuance of) notes receivable, net	1,484	1,079	(508)
Investment in unconsolidated ventures	(13,990)	(660)	(1,246)
Proceeds from sale leaseback transaction	0	0	9,166
Distributions received from unconsolidated ventures	206	97	1,061
Proceeds from sale of unconsolidated venture	0	675	8,843
Other	(914)	(676)	0
Net cash used in investing activities	(203,899)	(136,505)	(351,432)
Cash Flows from Financing Activities
Proceeds from debt	482,669	414,795	157,039
Proceeds from issuance of convertible notes, net	308,212	0	0
Issuance of warrants	45,066	0	0
Purchase of bond hedge	(77,007)	0	0
Repayment of debt and capital lease obligations	(898,565)	(476,527)	(32,587)
Proceeds from line of credit	225,000	60,000	60,446
Repayment of line of credit	(160,000)	(60,000)	(219,899)
Payment of financing costs, net of related payables	(8,712)	(8,541)	(8,700)
Proceeds from public equity offering, net	0	0	163,771
Other	(1,287)	(763)	(931)
Refundable entrance fees:
Proceeds from refundable entrance fees	29,611	36,420	30,386
Refunds of entrance fees	(25,754)	(21,060)	(22,916)
Cash portion of loss on extinguishment of debt	(17,040)	(179)	0
Recouponing and payment of swap termination	(99)	(20,427)	0
Purchase of treasury stock	(17,613)	0	0
Net cash (used in) provided by financing activities	(115,519)	(76,282)	126,609
Net (decrease) increase in cash and cash equivalents	(50,991)	15,457	12,397
Cash and cash equivalents at beginning of year	81,827	66,370	53,973
Cash and cash equivalents at end of year	$ 30,836	$ 81,827	$ 66,370