Disposed Properties - Schedule of Discontinued Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Total income		$ 844		$ 3,855
Depreciation and amortization expense		301		1,205
General and administrative, property operating, and real estate tax expenses		492		2,398
Operating income from discontinued operations		51		252
Interest expense, income taxes, and other miscellaneous expenses		(443)		(1,993)
Gain on sale of properties, net		10,115		10,115
Loss on extinguishment of debt		(2)		(2)
Net income from discontinued operations	$ 0	$ 9,721	$ 0	$ 8,372
Net income per common share, from discontinued operations, basic and diluted (in dollars per share)	$ 0.00	$ 0.01	$ 0.00	$ 0.01
Weighted average number of common shares outstanding, basic and diluted (in shares)	768,385,770	773,517,492	772,341,263	773,405,710

Disposal Group, Including Discontinued Operation, Loss On Extinguishment Of Debt

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Disposal Group, Including Discontinued Operations, Interest, Income Tax Expense, and Other Expense (Income)

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Per basic and diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation, when the per share amount is the same.

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Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.

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Amount of operating expense attributable to disposal group, including, but not limited to, discontinued operation.

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Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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