Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Share Based Compensation [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

	For the Nine Months Ended
	September 30,
	2013		2012
Stock options	$	378	$	403
Nonvested stock awards and restricted stock units		1,372		1,120
Employee stock purchase plan		43		35
Non-elective and elective 401(k) matching contribution in stock		1,283		1,351
Director stock ownership plan		57		45
Total share-based compensation expense	$	3,133	$	2,954

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

					Weighted
					Average
			Weighted Average		Remaining
		Number of	Exercise Price per		Contractual
		Shares	Share		Term (years)
Options outstanding at December 31, 2012		107,455	$	31.23
	Options granted	29,302		58.26
	Options exercised	(54,245)		26.56
	Options forfeited	(3,601)		37.81
	Options expired	(768)		37.37
Options outstanding at September 30, 2013		78,143	$	44.24		5.5
Options exercisable at September 30, 2013		14,732	$	30.23		4.3

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

						Weighted	Weighted		Number	Weighted
					Number	Average	Average		Exercisable	Average
Range of					Outstanding	Contractual	Exercise		at	Exercise
Exercise Prices					at 9/30/2013	Life	Price		9/30/2013	Price
$	0.00	-	$	10.00	0	0	$	0	0	$	0
$	10.01	-	$	20.00	6,155	3.3		18.82	6,155		18.82
$	20.01	-	$	30.00	0	0		0	0		0
$	30.01	-	$	40.00	40,494	5.1		37.85	7,846		37.68
$	40.01	-	$	50.00	2,192	5.7		46.21	731		46.21
$	50.01	-	$	60.00	29,302	6.4		58.26	0		0
					78,143	5.5		44.24	14,732		30.23

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2013
Number of options granted	29,302
Dividend yield	2.49	%
Expected volatility	57.28	%
Risk-free interest rate	0.63	%
Expected term (years)	4.0

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

		Weighted
		Average Grant
	Number of	Date Fair Value
	Shares	(per share)
Nonvested awards, December 31, 2012	122,944	$	31.98
Granted	51,659	$	61.56
Vested	(51,981)	$	26.02
Forfeited	(6,638)	$	41.70
Nonvested awards, September 30, 2013	115,984	$	47.27

		Weighted
		Average Grant
	Number of	Date Fair Value
	units	(per unit)
Nonvested awards, December 31, 2012	2,100	$	38.13
Granted	1,418	$	58.26
Nonvested awards, September 30, 2013	3,518	$	46.24