CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash dividends declared, per share (in USD per share)	$ 0.99	$ 0.82	$ 0.77
Retained Earnings
Cash dividends declared, per share (in USD per share)	$ 0.99	$ 0.82	$ 0.77
Treasury stock issued, net (in shares)	33,676	58,906	102,649
Treasury Stock
Treasury stock repurchased (in shares)	321,731

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration