Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Total rental property revenues	$ 740,340	$ 657,515	$ 475,212
Expenses:
Rental property operating expenses	250,850	222,146	164,678
Reimbursed expenses	1,580	4,004	3,782
General and administrative expenses	27,034	37,007	22,040
Interest expense	60,605	53,963	39,430
Impairment	14,829	0	0
Depreciation and amortization	288,648	257,149	181,382
Transaction costs	428	52,881	248
Other	2,091	1,109	556
Total costs and expenses	646,065	628,259	412,116
Income from unconsolidated joint ventures	7,947	12,666	12,224
Gain on sales of investments in unconsolidated joint ventures	45,767	0	0
Gain on investment property transactions	90,125	110,761	5,437
Gain on extinguishment of debt	0	0	8
Net income	238,114	152,683	80,765
Net income attributable to noncontrolling interests	(836)	(2,265)	(1,601)
Net income available to common stockholders	$ 237,278	$ 150,418	$ 79,164
Net income per common share — basic and diluted (in usd per share)	$ 1.60	$ 1.17	$ 0.75
Weighted average shares — basic (in shares)	148,277	128,060	105,076
Weighted average shares — diluted (in shares)	148,636	129,831	106,868
Dividends declared per common share (in usd per share)	$ 1.20	$ 1.16	$ 1.04
Rental property revenues
Revenues:
Total rental property revenues	$ 721,883	$ 628,751	$ 463,401
Fee income
Revenues:
Total rental property revenues	18,226	28,518	10,089
Other
Revenues:
Total rental property revenues	$ 231	$ 246	$ 1,722