Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 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]

	March 31,
	2013		2012
Stock options	$	100	$	128
Nonvested stock awards		383		380
Employee stock purchase plan		12		11
Non-elective and elective 401(k) matching contribution in stock		525		652
Director stock ownership plan		20		15
Total share-based compensation expense	$	1,040	$	1,186

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	(20,433)		25.46
	Options forfeited	(3,601)		37.81
Options outstanding at March 31, 2013		112,723	$	39.09		5.5
Options exercisable at March 31, 2013		48,581	$	28.01		4.5

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 3/31/2013	Life	Price		3/31/2013	Price
$	0.00	-	$	10.00	0	0	$	0	0	$	0
$	10.01	-	$	20.00	24,858	3.8		18.82	24,858		18.82
$	20.01	-	$	30.00	0	0		0	0		0
$	30.01	-	$	40.00	56,371	5.4		37.78	23,723		37.65
$	40.01	-	$	50.00	2,192	6.3		46.21	0		0
$	50.01	-	$	60.00	29,302	6.9		58.26	0		0
					112,723	5.5		39.09	48,581		28.01

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	26,611	$	58.26
Vested	(35,183)	$	20.25
Forfeited	(1,761)	$	37.76
Nonvested awards, March 31, 2013	112,611	$	41.77

		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
Vested	0	$	0.00
Forfeited	0	$	0.00
Nonvested awards, March 31, 2013	3,518	$	46.24