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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Subsequent Events (Details) - $ / shares		3 Months Ended								12 Months Ended
Subsequent Events (Details) - $ / shares	Feb. 14, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Subsequent Event [Line Items]
Cash Dividends Declared Per Common Share (in Dollars per Share)		$ 0.21	$ 0.19	$ 0.19	$ 0.19	$ 0.19	$ 0.165	$ 0.165	$ 0.165	$ 0.78	$ 0.685	$ 0.615
Subsequent Event
Subsequent Event [Line Items]
Cash Dividends Declared Per Common Share (in Dollars per Share)	$ 0.21