Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Community base rental income	$ 105,813	$ 102,954
Rental home income	4,165	3,043
Resort base rental income	40,739	37,579
Right-to-use annual payments	11,523	11,751
Right-to-use contracts current period, gross	2,831	2,244
Right-to-use contracts, deferred, net of prior period amortization	(1,040)	(607)
Utility and other income	17,165	16,403
Gross revenues from home sales	2,839	2,060
Brokered resale revenues and ancillary services revenues, net	1,796	1,746
Interest income	2,277	2,630
Income from other investments, net	2,480	1,488
Total revenues	190,588	181,291
Expenses:
Property operating and maintenance	56,674	54,442
Rental home operating and maintenance	2,187	1,605
Real estate taxes	12,917	12,522
Sales and marketing, gross	2,361	1,643
Sales and marketing, deferred commissions, net	(463)	(242)
Property management	10,249	9,751
Depreciation on real estate and rental homes	26,783	26,099
Amortization of in-place leases	159	18,365
Cost of home sales	2,960	2,216
Home selling expenses	527	333
General and administrative	6,816	6,232
Rent control initiatives and other	232	479
Interest and related amortization	30,252	30,956
Total expenses	151,654	164,401
Income before equity in income of unconsolidated joint ventures	38,934	16,890
Equity in income of unconsolidated joint ventures	576	763
(Income) loss allocated to non-controlling interests - Common OP Units	(3,133)	(1,191)
Net income (loss) available for Common Shares	35,024	12,431
Consolidated net income	40,468	17,653
Other comprehensive loss:
Adjustment for fair market value of swap	442	(378)
Comprehensive income (loss) attributable to Common Shareholders	35,430	12,086
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	40,910	17,275
Earnings per Common Share - Basic:
Net income (loss) available for Common Shares	$ 0.84	$ 0.30
Distributions declared per Common Share outstanding	$ 0.50	$ 0.4375
Weighted average Common Shares outstanding - basic	41,513	41,088
Earnings per Common Share - Fully Diluted:
Net income (loss) available for Common Shares	$ 0.84	$ 0.30
Weighted average Common Shares outstanding - fully diluted	45,530	45,369
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	958	0
Cumulative SeriesA Eight Point Zero Three Four Percent Redeemable Perpetual Preferred Stock [Member]
Other comprehensive loss:
Redeemable Preferred Stock Dividends	0	(4,031)
Cumulative Series C Six Point Seven Five Percent Redeemable Perpetual Preferred Stock [Member]
Other comprehensive loss:
Redeemable Preferred Stock Dividends	(2,311)	0
Non-controlling interests - Common OP Units
Other comprehensive loss:
Comprehensive income (loss) allocated to non-controlling interests	$ (3,169)	$ (1,158)