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Consolidated Statements of Changes to Stockholder's Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Issuance of shares of restricted stock, Shares	33,000	32,000	32,300
Cash dividends declared, per share	$ 0.56	$ 0.50	$ 0.46
Common Stock [Member]
Issuance of shares of restricted stock, Shares	33,000	32,000	32,300
Issuance of shares of restricted stock, forfeitures	2,620	1,080	1,546
Issuance of shares of restricted stock, Repurchases			72

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Aggregate dividends declared during the period for each share of common stock outstanding.

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