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Capital Stock - Schedule of Dividends Payable (Details) - $ / shares	Jan. 12, 2018	Oct. 12, 2017	Jul. 12, 2017	Apr. 12, 2017	Jan. 12, 2017	Oct. 12, 2016	Jul. 12, 2016	Apr. 12, 2016
Dividends Payable [Line Items]
Payment Date		Oct. 12, 2017	Jul. 12, 2017	Apr. 12, 2017	Jan. 12, 2017	Oct. 12, 2016	Jul. 12, 2016	Apr. 12, 2016
Record Date		Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Dividends per share (in dollars per share)		$ 0.1250	$ 0.1250	$ 0.125	$ 0.125	$ 0.1250	$ 0.1250	$ 0.125
Subsequent Event
Dividends Payable [Line Items]
Payment Date	Jan. 12, 2018
Record Date	Dec. 29, 2017
Dividends per share (in dollars per share)	$ 0.125

X

- Definition

Aggregate dividends paid 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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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

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