Employee Benefit And Stock Compensation Plans - Schedule Of Stock Options Outstanding By Exercise Price Range (Details)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Stock options by exercise price ranges
Options outstanding, Number outstanding | shares	285,999
Options outstanding, Weighted average exercise price	$ 10.45
Options outstanding, Weighted average remaining life (years)	4 years
Options exercisable, Number exercisable | shares	178,521
Options exercisable, Weighted average exercise price	$ 9.56
$6.00 - $7.54
Stock options by exercise price ranges
Range of exercise price, low	6.00
Range of exercise price, high	$ 7.54
Options outstanding, Number outstanding | shares	78,834
Options outstanding, Weighted average exercise price	$ 7.14
Options outstanding, Weighted average remaining life (years)	1 year 2 months 12 days
Options exercisable, Number exercisable | shares	78,834
Options exercisable, Weighted average exercise price	$ 7.14
$7.57 - $11.07
Stock options by exercise price ranges
Range of exercise price, low	7.57
Range of exercise price, high	$ 11.07
Options outstanding, Number outstanding | shares	58,516
Options outstanding, Weighted average exercise price	$ 10.18
Options outstanding, Weighted average remaining life (years)	4 years 4 months 24 days
Options exercisable, Number exercisable | shares	32,850
Options exercisable, Weighted average exercise price	$ 9.78
$11.08 - $12.06
Stock options by exercise price ranges
Range of exercise price, low	11.08
Range of exercise price, high	$ 12.06
Options outstanding, Number outstanding | shares	58,750
Options outstanding, Weighted average exercise price	$ 11.50
Options outstanding, Weighted average remaining life (years)	4 years 9 months 18 days
Options exercisable, Number exercisable | shares	32,918
Options exercisable, Weighted average exercise price	$ 11.46
$12.10 - $12.65
Stock options by exercise price ranges
Range of exercise price, low	12.10
Range of exercise price, high	$ 12.65
Options outstanding, Number outstanding | shares	57,820
Options outstanding, Weighted average exercise price	$ 12.46
Options outstanding, Weighted average remaining life (years)	5 years 9 months 18 days
Options exercisable, Number exercisable | shares	13,669
Options exercisable, Weighted average exercise price	$ 12.40
$12.70 - $15.20
Stock options by exercise price ranges
Range of exercise price, low	12.70
Range of exercise price, high	$ 15.20
Options outstanding, Number outstanding | shares	32,079
Options outstanding, Weighted average exercise price	$ 13.50
Options outstanding, Weighted average remaining life (years)	5 years 8 months 12 days
Options exercisable, Number exercisable | shares	20,250
Options exercisable, Weighted average exercise price	$ 13.61