Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows From Operating Activities:
Consolidated net income	$ 23,953	$ 37,286
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation expense	53,235	37,387
Amortization of in-place leases	36,766
Amortization of loan costs	2,788	2,263
Debt premium amortization	(3,435)	(10)
Equity in income of unconsolidated joint ventures	(1,838)	(1,938)
Distributions from unconsolidated joint ventures	1,107	1,332
Amortization of stock-related compensation	3,285	2,969
Revenue recognized from right-to-use contract upfront payments	(3,295)	(2,800)
Commission expense recognized related to right-to-use contracts	1,113	909
Accrued long term incentive plan compensation	390	544
Provision for uncollectible rents receivable	(29)	608
Changes in assets and liabilities:
Notes receivable activity, net	268	189
Rent and other customer receivables, net	257	(670)
Inventory	(86)	337
Deferred commission expense	(2,010)	(3,256)
Escrow deposits and other assets	(1,919)	(5,145)
Accrued payroll and other operating expenses, net	4,248	7,948
Deferred revenue - upfront payments from right-to-use contracts	5,186	8,710
Deferred revenue - right-to-use annual payments	4,146	4,192
Rents received in advance and security deposits	4,896	4,414
Net cash provided by operating activities	129,026	95,269
Cash Flows From Investing Activities:
Proceeds from short-term investments		52,266
Net repayments (borrowings) of notes receivable	3,681	(2,832)
Acquisition escrow deposit		(300,000)
Capital improvements	(30,560)	(24,478)
Net cash used in investing activities	(26,879)	(275,044)
Cash Flows From Financing Activities:
Net proceeds from stock options and employee stock purchase plan	696	673
Net proceeds from issuance of Common Stock		344,049
Distributions to Common Stockholders, Common OP Unitholders, Perpetual Preferred OP Unitholders and Preferred Stockholders	(44,811)	(32,038)
Stock repurchase and Unit redemption	(43)	(216)
Principal payments and mortgage debt payoff	(78,297)	(56,281)
New financing proceeds	85,500
Equity issuance costs	(18)
Debt issuance costs	(667)	(3,727)
Net cash (used in) provided by financing activities	(37,640)	252,460
Net increase in cash and cash equivalents	64,507	72,685
Cash and cash equivalents, beginning of period	70,460	12,659
Cash and cash equivalents, end of period	134,967	85,344
Supplemental Information:
Cash paid during the period for interest	58,672	41,228
Non-cash activities (increase/(decrease)):
Manufactured homes acquired with dealer financing		830
Dealer financing		(830)
Capital improvements - used homes acquired by repossessions	3,993	252
Net repayments of notes receivable - used homes acquired by repossessions	(3,993)	(252)
Building and other depreciable property - reclassification of rental homes	(3,091)	(1,405)
Escrow deposits and other assets - reclassification of rental homes	3,091	1,405
Series A Cumulative Redeemable Perpetual Preferred Stock		200,000
Perpetual Preferred OP Units conversion		$ (200,000)