Stock Based Compensation (Tables)

6 Months Ended

Jun. 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 Six Months Ended June 30,
	2013		2012
Stock options	$	238	$	263
Nonvested stock awards and restricted stock units		911		732
Employee stock purchase plan		26		23
Non-elective and elective 401(k) matching contribution in stock		936		1,030
Director stock ownership plan		41		30
Total share-based compensation expense	$	2,152	$	2,078

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	(23,415)		25.10
	Options forfeited	(3,601)		37.81
	Options expired	(768)		37.37
Options outstanding at June 30, 2013		108,973	$	39.55		5.3
Options exercisable at June 30, 2013		45,562	$	28.50		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 6/30/2013	Life	Price		6/30/2013	Price
$	0.00	-	$	10.00	0	0	$	0	0	$	0
$	10.01	-	$	20.00	22,490	3.6		18.82	22,490		18.82
$	20.01	-	$	30.00	0	0		0	0		0
$	30.01	-	$	40.00	54,989	5.2		37.79	22,341		37.66
$	40.01	-	$	50.00	2,192	6.0		46.21	731		46.21
$	50.01	-	$	60.00	29,302	6.7		58.26	0		0
					108,973	5.3		39.55	45,562		28.50

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	46,659	$	61.00
Vested	(47,481)	$	25.03
Forfeited	(4,430)	$	40.85
Nonvested awards, June 30, 2013	117,692	$	45.95

		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, June 30, 2013	3,518	$	46.24