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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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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Stockholders' Equity - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Oct. 04, 2018	Jul. 13, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Subsequent Event [Line Items]
Quarterly cash dividend (in dollars per share)		$ 0.16	$ 160,000.00	$ 160,000.00	$ 0.48	$ 0.48
Amount of quarterly cash dividend declared		$ 25.1
Subsequent Event
Subsequent Event [Line Items]
Quarterly cash dividend (in dollars per share)	$ 0.16