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Dividends and Distribution Payable - Federal Income Tax (Details) - $ / shares	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Dividends Payable [Line Items]
Dividends Payable, Amount Per Share	$ 2.155	$ 2.025	$ 1.920
Dividend Declared, Ordinary Income [Member]
Dividends Payable [Line Items]
Dividends Payable, Amount Per Share	1.638	1.695	1.557
Dividend Declared, Return of Capital [Member]
Dividends Payable [Line Items]
Dividends Payable, Amount Per Share	$ 0.517	$ 0.330	$ 0.363

X

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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- Definition

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+ References

No definition available.

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