Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue
Real estate rental revenue	$ 309,180	$ 291,730	$ 280,281
Expenses
Real estate expenses	115,580	105,592	105,400
Depreciation and amortization	136,253	111,826	101,430
Real estate impairment	8,374	1,886	33,152
General and administrative expenses	24,370	22,089	22,580
Lease origination expenses	1,698	0	0
Total expenses	286,275	241,393	262,562
Other operating income
Gain on sale of real estate	59,961	2,495	24,915
Real estate operating income	82,866	52,832	42,634
Other income (expense)
Interest expense	(53,734)	(50,501)	(46,793)
Other income	0	0	507
Loss on extinguishment of debt	0	(1,178)	0
Income tax benefit	0	0	84
Total other income (expense)	(53,734)	(51,679)	(46,202)
Income (loss) from continuing operations	29,132	1,153	(3,568)
Discontinued operations:
Income from operations of properties sold or held for sale	16,158	24,477	23,180
Gain on sale of real estate	339,024	0	0
Loss on extinguishment of debt	(764)	0	0
Income from discontinued operations	354,418	24,477	23,180
Net income	383,550	25,630	19,612
Less: Net loss attributable to noncontrolling interests in subsidiaries	0	0	56
Net income attributable to the controlling interests	$ 383,550	$ 25,630	$ 19,668
Basic net income (loss) attributable to the controlling interests per share
Continuing operations, basic (in dollars per share)	$ 0.36	$ 0.01	$ (0.05)
Discontinued operations, including gain on sale of real estate, basic (in dollars per share)	4.39	0.31	0.30
Net income attributable to the controlling interests per share (in dollars per share)	4.75	0.32	0.25
Diluted net income (loss) attributable to the controlling interests per share
Continuing operations, diluted (in dollars per share)	0.36	0.01	(0.05)
Discontinued operations, including gain on sale of real estate, diluted (in dollars per share)	4.39	0.31	0.30
Net income attributable to the controlling interests per share (in dollars per share)	$ 4.75	$ 0.32	$ 0.25
Weighted average shares outstanding – basic (in shares)	80,257	78,960	76,820
Weighted average shares outstanding – diluted (in shares)	80,335	79,042	76,820