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

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=6367179&loc=d3e4304-108586

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- Definition

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

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

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Events (Details) - $ / shares	May. 05, 2016	Feb. 10, 2016	Nov. 03, 2015	Aug. 03, 2015	May. 06, 2015	Feb. 10, 2015
Subsequent Event [Line Items]
Dividends declared date		Feb. 10, 2016	Nov. 03, 2015	Aug. 03, 2015	May 06, 2015	Feb. 10, 2015
Dividend amount to be paid, per common share		$ 0.3250	$ 0.3150	$ 0.3075	$ 0.3000	$ 0.2925
Date dividend is payable		Mar. 10, 2016	Dec. 03, 2015	Sep. 01, 2015	Jun. 03, 2015	Mar. 09, 2015
Date shareholders must be on record for dividend		Feb. 23, 2016	Nov. 17, 2015	Aug. 17, 2015	May 19, 2015	Feb. 23, 2015
Dividend Declared [Member]
Subsequent Event [Line Items]
Dividends declared date	May 05, 2016
Dividend amount to be paid, per common share	$ 0.3350
Date dividend is payable	Jun. 02, 2016
Date shareholders must be on record for dividend	May 18, 2016