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		6 Months Ended
Subsequent Events (Details) - $ / shares	Aug. 02, 2019	May 03, 2019	Feb. 26, 2019	Nov. 02, 2018	Aug. 02, 2018	May 04, 2018	Feb. 21, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash Dividend
Cash dividend declared (in dollars per share)		$ 0.060	$ 0.060	$ 0.060	$ 0.060	$ 0.060	$ 0.060	$ 0.060	$ 0.060	$ 0.120	$ 0.120
Subsequent Events
Cash Dividend
Cash dividend declared (in dollars per share)	$ 0.06