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

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Subsequent Events - Dividends (Details) - $ / shares							3 Months Ended	6 Months Ended
Subsequent Events - Dividends (Details) - $ / shares	Sep. 15, 2017	Aug. 11, 2017	Jun. 16, 2017	May 12, 2017	Apr. 19, 2017	Mar. 22, 2017	Jun. 30, 2017	Jun. 30, 2017
Subsequent Event [Line Items]
Cash dividends declared per common share				$ 0.12		$ 0.12	$ 0.12	$ 0.24
Cash dividends paid per common share			$ 0.12		$ 0.12
Subsequent event
Subsequent Event [Line Items]
Cash dividends declared per common share		$ 0.12
Cash dividends paid per common share	$ 0.12