Stock-Based Compensation Plans (Schedule of Stock Option Activity) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Number of Shares
Options outstanding, beginning | shares	94,250
Granted | shares	2,500
Exercised | shares	(36,671)
Forfeited and expired | shares	(6,500)
Options outstanding, ending | shares	146,267
Options exercisable | shares	134,667
Weighted Average Exercise Price Per Share
Options outstanding, beginning | $ / shares	$ 33.44
Granted | $ / shares	39.85
Exercised | $ / shares	26.39
Forfeited and expired | $ / shares	36.51
Options outstanding, ending | $ / shares	25.40
Options exercisable | $ / shares	$ 24.48
Weighted- Average Remaining Contractual Term
Options outstanding	4 years 8 months 12 days
Options exercisable	4 years 6 months
Aggregate Intrinsic Value
Options outstanding | $	$ 2,739
Options exercisable | $	$ 2,646
SBM Financial, Inc. [Member]
Number of Shares
Granted | shares	92,688	[1]
Weighted Average Exercise Price Per Share
Granted | $ / shares	$ 18.00	[1]

[1] Non-qualified stock options issued in conjunction with the SBM acquisition. Refer to Note 2.