Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Retained Earnings
Cash dividend per share (in dollars per share)	$ 0.51	$ 0.15	$ 0.17	$ 0.45
Treasury Stock
Purchase of common stock (shares)	477,400		786,567

Number of shares that have been repurchased during the period and are being held in treasury.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration