Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Investment in real estate:
Land	$ 1,525,407,000	$ 1,408,832,000
Land improvements	3,336,070,000	3,143,745,000
Buildings and other depreciable property	881,572,000	720,900,000
Investment in real estate	5,743,049,000	5,273,477,000
Accumulated depreciation	(1,776,224,000)	(1,631,888,000)
Net investment in real estate	3,966,825,000	3,641,589,000
Cash and restricted cash	28,860,000	68,974,000
Notes receivable, net	37,558,000	35,041,000
Investment in unconsolidated joint ventures	20,074,000	57,755,000
Deferred commission expense	41,149,000	40,308,000
Other assets, net	56,809,000	46,227,000
Assets held for sale, net	0	35,914,000
Total Assets	4,151,275,000	3,925,808,000
Liabilities:
Mortgage notes payable, net	2,049,509,000	2,149,726,000
Term loan, net	198,949,000	198,626,000
Unsecured line of credit	160,000,000	0
Accounts payable and other liabilities	124,665,000	102,854,000
Deferred revenue-upfront payment from right-to-use contracts	126,814,000	116,363,000
Accrued interest payable	8,639,000	8,759,000
Rents and other customer payments received in advance and security deposits	91,234,000	81,114,000
Distributions payable	58,978,000	52,617,000
Liabilities related to assets held for sale	0	12,350,000
Total Liabilities	2,829,387,000	2,732,464,000
Stockholders' Equity:
Preferred stock, $0.01 par value, 10,000,000 shares authorized as of December 31, 2019 and December 31, 2018; none issued and outstanding.	0	0
Common stock, $0.01 par value, 400,000,000 and 200,000,000 shares authorized as of December 31, 2019 and December 31, 2018, respectively; 182,089,595 and 179,842,036 shares issued and outstanding as of December 31, 2019 and December 31, 2018, respectively.	1,812,000	1,792,000
Paid-in capital	1,402,696,000	1,328,495,000
Distributions in excess of accumulated earnings	(154,318,000)	(211,034,000)
Accumulated other comprehensive income (loss)	(380,000)	2,299,000
Total Stockholders’ Equity	1,249,810,000	1,121,552,000
Non-controlling interests – Common OP Units	72,078,000	71,792,000
Total Equity	1,321,888,000	1,193,344,000
Total Liabilities and Equity	4,151,275,000	3,925,808,000
Membership upgrade sales upfront payments, deferred, net
Liabilities:
Deferred revenue-upfront payment from right-to-use contracts	126,814,000	116,363,000
Annual membership subscriptions
Liabilities:
Deferred revenue-upfront payment from right-to-use contracts	$ 10,599,000	$ 10,055,000