Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Rental income	$ 1,032,575	$ 923,743	$ 879,635
Other income	50,298	46,008	43,063
Interest income	7,016	7,154	7,207
Income from other investments, net	4,555	4,026	9,528
Total revenues	1,271,694	1,091,448	1,037,256
Expenses:
Property operating and maintenance	398,983	354,340	333,520
Real estate taxes	72,671	66,120	62,338
Sales and marketing, gross	23,743	17,332	15,583
Membership sales commissions, deferred, net	(5,075)	(1,660)	(1,219)
Depreciation and amortization	188,444	155,131	152,110
Home selling expenses	5,138	4,572	4,401
General and administrative	40,717	39,276	35,679
Other expenses	3,100	2,567	2,865
Early debt retirement	2,784	10,786	1,491
Interest and related amortization	108,718	102,771	104,223
Total expenses	999,516	855,431	802,596
Gain (Loss) on sale of real estate, net	(59)	0	52,507
Income before equity in income of unconsolidated joint ventures	272,119	236,017	287,167
Equity in income of unconsolidated joint ventures	3,881	5,399	8,755
Consolidated net income	276,000	241,416	295,922
Income allocated to non-controlling interests – Common OP Units	(13,522)	(13,132)	(16,783)
Net income available for Common Stockholders	262,462	228,268	279,123
Other comprehensive income (loss):
Adjustment for fair market value of swap	3,524	380	(2,679)
Consolidated comprehensive income	279,524	241,796	293,243
Comprehensive income allocated to non-controlling interests – Common OP Units	(13,692)	(13,154)	(16,633)
Comprehensive income attributable to Common Stockholders	$ 265,816	$ 228,626	$ 276,594
Earnings per Common Share – Basic (usd per share)	$ 1.43	$ 1.26	$ 1.54
Earnings per Common Share – Fully Diluted (usd per share)	$ 1.43	$ 1.25	$ 1.54
Weighted average Common Shares outstanding – Basic (shares)	182,917	181,828	180,805
Weighted average Common Shares outstanding – Fully Diluted (shares)	192,883	192,555	191,995
Redeemable Perpetual Preferred  Stock
Expenses:
Redeemable perpetual preferred stock dividends	$ (16)	$ (16)	$ (16)
Other comprehensive income (loss):
Redeemable perpetual preferred stock dividends	(16)	(16)	(16)
Annual membership subscriptions
Revenues:
Revenue from contract with customer	58,251	53,085	51,015
Membership upgrade sales current period, gross
Revenues:
Revenue from contract with customer	36,270	21,739	19,111
Membership upgrade sales upfront payments, deferred, net
Revenues:
Revenue from contract with customer	(25,079)	(12,062)	(10,451)
Gross revenues from home sales
Revenues:
Revenue from contract with customer	98,457	45,695	34,655
Expenses:
Cost of goods and services sold	94,314	46,229	35,096
Brokered resale and ancillary services revenues, net
Revenues:
Revenue from contract with customer	9,351	2,060	3,493
Property management
Expenses:
Cost of goods and services sold	$ 65,979	$ 57,967	$ 56,509