Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Rental income	$ 879,635	$ 821,114	$ 768,416
Revenue from contract with customer	19,111	15,191
Other income	43,063	51,935	47,599
Interest income	7,207	7,525	7,580
Total revenues	1,037,256	986,653	925,312
Investment Income, Net	9,528	10,842	5,795
Expenses:
Property operating and maintenance	333,520	319,839	300,729
Real estate taxes	62,338	55,892	55,010
Sales and marketing, gross	15,583	12,542	11,438
Membership sales commissions, deferred, net	(1,219)	(813)	(354)
Depreciation and amortization	152,110	137,209	123,686
Home selling expenses	4,401	4,095	4,186
General and administrative	35,679	37,684	31,737
Other expenses	2,865	1,483	1,148
Early debt retirement	1,491	1,071	2,785
Interest and related amortization	104,223	104,993	100,570
Total expenses	802,596	765,206	718,700
Gain on sale of real estate, net	52,507	0	0
Income before equity in income of unconsolidated joint ventures	287,167	221,447	206,612
Equity in income of unconsolidated joint ventures	8,755	4,939	3,765
Consolidated net income	295,922	226,386	210,377
Income allocated to non-controlling interests – Common OP Units	(16,783)	(13,774)	(12,788)
Net income available for Common Stockholders	279,123	212,596	189,904
Other comprehensive income (loss):
Adjustment for fair market value of swap	(2,679)	1,357	1,169
Consolidated comprehensive income	293,243	227,743	211,546
Comprehensive income allocated to non-controlling interests – Common OP Units	(16,633)	(13,861)	(12,813)
Comprehensive income attributable to Common Stockholders	$ 276,594	$ 213,866	$ 191,048
Earnings per Common Share – Basic (usd per share)	$ 1.54	$ 1.19	$ 1.09
Earnings per Common Share – Fully Diluted (usd per share)	$ 1.54	$ 1.19	$ 1.08
Weighted average Common Shares outstanding – Basic (shares)	180,805	177,928	173,994
Weighted average Common Shares outstanding – Fully Diluted (shares)	191,995	190,110	186,850
Redeemable Perpetual Preferred Stock
Expenses:
Redeemable perpetual preferred stock dividends	$ (16)	$ (16)	$ (7,685)
Other comprehensive income (loss):
Redeemable perpetual preferred stock dividends	(16)	(16)	(7,685)
Annual membership subscriptions
Revenues:
Revenue from contract with customer	51,015	47,778	45,798
Membership upgrade sales current period, gross
Revenues:
Revenue from contract with customer	19,111	15,191	14,132
Membership upgrade sales upfront payments, deferred, net
Revenues:
Revenue from contract with customer	(10,451)	(7,380)	(4,108)
Gross revenues from home sales
Revenues:
Revenue from contract with customer	34,655	36,064	36,302
Expenses:
Cost of goods and services sold	35,096	37,475	36,513
Brokered resale and ancillary services revenues, net
Revenues:
Revenue from contract with customer	3,493	3,584	3,798
Property management
Expenses:
Cost of goods and services sold	$ 56,509	$ 53,736	$ 51,252