Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Revenues	$ 132,733	$ 117,202
Expenses:
Rental property operating expenses	43,487	40,191
Reimbursed expenses	932	942
General and administrative expenses	11,460	6,809
Interest expense	10,820	9,778
Depreciation and amortization	45,861	45,093
Acquisition costs	3	91
Other	180	320
Total costs and expenses	112,743	103,224
Income from unconsolidated joint ventures	2,904	2,885
Gain (loss) on sale of investment properties	13,111	(372)
Loss on extinguishment of debt	0	(85)
Net income	36,005	16,406
Net income attributable to noncontrolling interests	(664)	(363)
Net income available to common stockholders	$ 35,341	$ 16,043
Net income per common share — basic and diluted (in usd per share)	$ 0.08	$ 0.04
Weighted average shares — basic (in shares)	420,510	420,154
Weighted average shares — diluted (in shares)	427,607	427,695
Rental property revenues
Revenues:
Revenues	$ 123,345	$ 113,348
Fee income
Revenues:
Revenues	8,728	2,894
Other
Revenues:
Revenues	$ 660	$ 960