Reportable Segments - Income from Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Other income	$ 50,298	$ 46,008	$ 43,063
Total revenues	1,271,694	1,091,448	1,037,256
Expenses:
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)
Total expenses	999,516	855,431	802,596
Income before equity in income of unconsolidated joint ventures	272,119	236,017	287,167
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)
Property management
Expenses:
Cost of home sales	65,979	57,967	56,509
Home Sales
Revenues:
Revenue from contract with customer	98,457	45,695	34,655
Expenses:
Cost of home sales	94,314	46,229	35,096
Property Operations
Revenues:
Rental income	1,015,879	907,305	864,701
Other income			43,063
Total revenues	1,143,606	1,017,249	969,560
Expenses:
Operating and maintenance	393,256	348,394	327,917
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)
Total expenses	550,574	488,153	461,128
Income before equity in income of unconsolidated joint ventures	593,032	529,096	508,432
Property Operations | Annual membership subscriptions
Revenues:
Revenue from contract with customer	58,251	53,085	51,015
Property Operations | Membership upgrade sales current period, gross
Revenues:
Revenue from contract with customer	36,270	21,739	19,111
Property Operations | Membership upgrade sales upfront payments, deferred, net
Revenues:
Revenue from contract with customer	(25,079)	(12,062)	(10,451)
Property Operations | Ancillary services revenues, net
Revenues:
Revenue from contract with customer	7,987	1,174	2,121
Property Operations | Property management
Expenses:
Cost of home sales	65,979	57,967	56,509
Home Sales and Rentals Operations
Revenues:
Rental income	16,696	16,438	14,934
Total revenues	116,517	63,019	50,961
Expenses:
Operating and maintenance	5,727	5,946	5,603
Home selling expenses	5,138	4,572	4,401
Total expenses	105,179	56,747	45,100
Income before equity in income of unconsolidated joint ventures	11,338	6,272	5,861
Home Sales and Rentals Operations | Home Sales
Revenues:
Revenue from contract with customer	98,457	45,695	34,655
Expenses:
Cost of home sales	94,314	46,229	35,096
Home Sales and Rentals Operations | Brokered resale revenues, net
Revenues:
Revenue from contract with customer	$ 1,364	$ 886	$ 1,372