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Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividend, per share	$ 0.19	$ 0.20
Excise of stock option, shares	36,424

X

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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-Topic 230
-SubTopic 10
-Section 50
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- Definition

Number of share options (or share units) exercised during the current period.

+ References

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