Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Stock repurchased during period (in shares)		51,384
Stock options exercised (in shares)	4,950	4,134
Vesting of restricted stock (in shares)	7,086	5,510
Equity-based compensation (in shares)	24,344	35,984
Cash dividends paid (in dollars per share)	$ 0.72	$ 0.72