Condensed Consolidated Statement of Changes in Stockholder's Equity (Parenthetical) - $ / shares	3 Months Ended	9 Months Ended
Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Consolidated Statements of Changes in Stockholders' Equity
Dividends (in dollars per share)	$ 0.31	$ 0.31	$ 0.27	$ 0.27	$ 0.36	$ 0.31

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

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