Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Community base rental income	$ 518,252	$ 489,613	$ 464,745
Rental home income	14,329	14,344	14,107
Resort base rental income	239,906	218,806	201,533
Revenue from contract with customer		14,132
Utility and other income	100,562	93,252	81,427
Interest income	7,525	7,580	6,845
Income from other investments, net	10,842	5,795	7,310
Total revenues	986,653	925,312	870,435
Expenses:
Property operating and maintenance	313,003	294,119	268,249
Rental home operating and maintenance	6,836	6,610	6,883
Real estate taxes	55,892	55,010	53,036
Sales and marketing, gross	12,542	11,438	11,056
Right-to-use contract commissions, deferred, net	(813)	(354)	(223)
Depreciation on real estate assets and rental homes	130,022	121,455	117,400
Amortization of in-place leases	7,187	2,231	3,373
Home selling expenses	4,095	4,186	3,575
General and administrative	37,684	31,737	31,004
Other expenses	1,483	1,148	4,986
Early debt retirement	1,071	2,785	0
Interest and related amortization	104,993	100,570	102,030
Total expenses	765,206	718,700	685,908
Income before equity in income of unconsolidated joint ventures	221,447	206,612	184,527
Equity in income of unconsolidated joint ventures	4,939	3,765	2,605
Consolidated net income	226,386	210,377	187,132
Income allocated to non-controlling interests – Common OP Units	(13,774)	(12,788)	(13,869)
Redeemable perpetual preferred stock dividends and original issuance costs	(16)	(7,685)	(9,226)
Net income available for Common Stockholders	212,596	189,904	164,037
Other comprehensive income (loss):
Adjustment for fair market value of swap	1,357	1,169	326
Consolidated comprehensive income	227,743	211,546	187,458
Comprehensive income allocated to non-controlling interests – Common OP Units	(13,861)	(12,813)	(13,893)
Redeemable perpetual preferred stock dividends and original issuance costs	(16)	(7,685)	(9,226)
Comprehensive income attributable to Common Stockholders	$ 213,866	$ 191,048	$ 164,339
Earnings per Common Share – Basic (usd per share)	$ 2.39	$ 2.18	$ 1.93
Earnings per Common Share – Fully Diluted (usd per share)	$ 2.38	$ 2.17	$ 1.92
Weighted average Common Shares outstanding – Basic (shares)	88,964	86,997	84,778
Weighted average Common Shares outstanding – Fully Diluted (shares)	95,055	93,425	92,569
Redeemable Perpetual Preferred Stock
Expenses:
Redeemable perpetual preferred stock dividends and original issuance costs	$ (16)	$ (7,685)	$ (9,226)
Other comprehensive income (loss):
Redeemable perpetual preferred stock dividends and original issuance costs	(16)	(7,685)	(9,226)
Right-to-use annual payments
Revenues:
Revenue from contract with customer	47,778	45,798	45,035
Right-to-use contracts current period, gross
Revenues:
Revenue from contract with customer	15,191	14,132	12,327
Right-to-use contract upfront payments, deferred, net
Revenues:
Right-to-use contract upfront payments, deferred, net	(7,380)	(4,108)	(3,079)
Gross revenues from home sales
Revenues:
Revenue from contract with customer	36,064	36,302	37,191
Expenses:
Cost of goods and services sold	37,475	36,513	37,456
Brokered resale and ancillary services revenues, net
Revenues:
Revenue from contract with customer	3,584	3,798	2,994
Property management
Expenses:
Cost of goods and services sold	$ 53,736	$ 51,252	$ 47,083