Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Stock repurchased during period (shares)	51,384	150,656	70,184
Stock options exercised (shares)	5,784	42,680	26,000
Equity based compensation (shares)	41,644	15,386	25,849
Cash dividends paid (in dollars per share)	$ 0.96	$ 0.93	$ 0.92
Common Stock
Issuance of common stock (shares)		825,586