Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (Unaudited) - $ / shares	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Cash dividend declared per share	$ 0.19	$ 0.16
Retained Earnings
Cash dividend declared per share	$ 0.19	$ 0.16
Treasury Stock
Treasury shares purchased shares	146,318
Treasury shares reissued shares	2,770	2,770
Additional Paid-in Capital
Treasury shares reissued shares	2,770	2,770

Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 3: 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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