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Income Taxes (Schedule of Per Share Distributions Reported to Shareholders) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Ordinary Income	$ 2.38	$ 0.00	$ 1.88
Long-term capital gain	0.41	5.02	0.70
Unrecaptured Sec. 1250 gain	0.21	2.23	0.22
Total common share distributions	$ 3.00	$ 7.25	$ 2.80

X

- Definition

Gain from a qualifying investment owned for longer than 12 months and then sold for a price greater than the purchase price. Taxes can be deferred until the sale of asset.

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No definition available.

+ Details

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- Definition

The cash outflow from distributions of an entity's earnings to common and preferred stockholders, including minority shareholders. Ordinary dividends are paid out of the earnings and profits of the entity and are taxed as ordinary income.

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No definition available.

+ Details

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- Definition

A type of depreciation-recapture income that is realized on the sale of depreciable real estate. Unrecaptured Section 1250 income is taxed at a 25% maximum capital gains rate (or in some cases less).

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No definition available.

+ Details

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- References

No definition available.

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