CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows from Operating Activities
Net loss	$ (3,584)	$ (66,467)	$ (69,050)
Adjustments to reconcile net loss to net cash provided by operating activities:
Loss on extinguishment of debt	1,265	221	18,863
Depreciation and amortization	285,811	270,362	281,933
Asset impairment	12,891	27,677	16,892
Equity in (earnings) loss of unconsolidated ventures	(1,484)	3,488	(1,432)
Distributions from unconsolidated ventures from cumulative share of net earnings	2,691	1,507	1,282
Amortization of deferred gain	(4,372)	(4,372)	(4,373)
Amortization of entrance fees	(29,009)	(25,362)	(23,966)
Proceeds from deferred entrance fee revenue	44,191	40,105	38,378
Deferred income tax (benefit) provision	(183)	(525)	383
Change in deferred lease liability	2,597	6,668	8,608
Change in fair value of derivatives and amortization	(980)	364	3,878
(Gain) loss on sale of assets	(972)	332	(1,180)
Loss (gain) on acquisition	0	636	(1,982)
Gain on facility lease termination	0	(11,584)	0
Lessor cash reimbursement for tenant incentive	0	0	1,251
Change in future service obligation	(1,917)	2,188	0
Non-cash stock-based compensation	25,978	25,520	19,856
Other	0	(487)	0
Changes in operating assets and liabilities:
Accounts receivable, net	(5,449)	(3,415)	(5,367)
Prepaid expenses and other assets, net	7,483	8,687	(22,934)
Accounts payable and accrued expenses	33,837	4,854	13,721
Tenant refundable fees and security deposits	(792)	(1,547)	(2,186)
Deferred revenue	(1,881)	12,119	(4,148)
Net cash provided by operating activities	366,121	290,969	268,427
Cash Flows from Investing Activities
Increase in lease security deposits and lease acquisition deposits, net	(2,051)	(7,999)	(3,088)
Decrease (increase) in cash and escrow deposits - restricted	10,726	(4,810)	56,176
Purchase of marketable securities - restricted	0	(1,557)	(32,724)
Sale of marketable securities - restricted	0	35,124	1,431
Additions to property, plant and equipment, and leasehold intangibles, net of related payables	(257,527)	(208,412)	(160,131)
Acquisition of assets, net of related payables and cash received	(34,686)	(272,523)	(88,682)
Purchase of Horizon Bay Realty, L.L.C., net of cash acquired	0	0	5,516
Payments on notes receivable, net	168	131	1,484
Investment in unconsolidated ventures	(17,172)	(5,368)	(13,990)
Distributions received from unconsolidated ventures	1,600	350	206
Proceeds from sale of assets, net	34,136	9,243	30,817
Other	0	487	(914)
Net cash used in investing activities	(264,806)	(455,334)	(203,899)
Cash Flows from Financing Activities
Proceeds from debt	662,934	372,291	482,669
Repayment of debt and capital lease obligations	(724,133)	(191,835)	(898,565)
Proceeds from line of credit	425,000	375,000	225,000
Repayment of line of credit	(475,000)	(360,000)	(160,000)
Proceeds from issuance of convertible notes, net	0	0	308,212
Issuance of warrants	0	0	45,066
Purchase of bond hedge	0	0	(77,007)
Payment of financing costs, net of related payables	(11,576)	(5,563)	(8,712)
Refundable entrance fees:
Proceeds from refundable entrance fees	48,140	42,600	29,611
Refunds of entrance fees	(35,325)	(27,356)	(25,754)
Cash portion of loss on extinguishment of debt	(502)	(118)	(17,040)
Purchase of derivatives and payment of swap termination	(2,863)	(1,908)	(99)
Purchase of treasury stock	0	0	(17,613)
Other	1,281	(342)	(1,287)
Net cash (used in) provided by financing activities	(112,044)	202,769	(115,519)
Net (decrease) increase in cash and cash equivalents	(10,729)	38,404	(50,991)
Cash and cash equivalents at beginning of year	69,240	30,836	81,827
Cash and cash equivalents at end of year	$ 58,511	$ 69,240	$ 30,836