Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total rental property revenues	$ 657,515	$ 475,212	$ 466,185
Expenses:
Rental property operating expenses	222,146	164,678	163,882
Reimbursed expenses	4,004	3,782	3,527
General and administrative expenses	37,007	22,040	27,523
Interest expense	53,963	39,430	33,524
Depreciation and amortization	257,149	181,382	196,745
Transaction costs	52,881	248	1,661
Other	1,109	556	1,796
Total costs and expenses	628,259	412,116	428,658
Income from unconsolidated joint ventures	12,666	12,224	47,115
Gain on investment property transactions	110,761	5,437	133,059
Gain on extinguishment of debt	0	8	2,258
Net income	152,683	80,765	219,959
Net income attributable to noncontrolling interests	(2,265)	(1,601)	(3,684)
Net income available to common stockholders	$ 150,418	$ 79,164	$ 216,275
Net income per common share — basic and diluted (in usd per share)	$ 1.17	$ 0.75	$ 2.08
Weighted average shares — basic (in shares)	128,060	105,076	103,902
Weighted average shares — diluted (in shares)	129,831	106,868	105,824
Dividends declared per common share (in usd per share)	$ 1.16	$ 1.04	$ 1.20
Rental property revenues
Revenues:
Total rental property revenues	$ 628,751	$ 463,401	$ 455,305
Fee income
Revenues:
Total rental property revenues	28,518	10,089	8,632
Other
Revenues:
Total rental property revenues	$ 246	$ 1,722	$ 2,248