Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash dividend per share (in dollars per share)	$ 0.42	$ 0.30	$ 0.25
Repurchases of common stock (in shares)	691,742	255,000	449,371

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