Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Stock-based Compensation [Abstract]

Summary of Stock Option Activity [Table Text Block]

	2013	2012	2011
Number of shares under the plans:
Outstanding and exercisable at beginning of year	22,500	39,950	80,950
Granted	-	-	-
Canceled	-	-	-
Exercised	(3,750)	(17,450)	(41,000)
Outstanding and exercisable at end of year	18,750	22,500	39,950
Number of shares available for future grant:
Beginning of year	561,655	315,840	391,881
End of year	557,655	561,655	315,840

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

	Options Outstanding and Exercisable
	Number	Weighted Average		Weighted
Range of Exercise Prices	of Shares	Remaining Life		Exercise Price
$7.81 - $8.97	10,000	0.9	$	8.39
$9.29 - $14.77	8,750	1.7		13.20
	18,750	1.3	$	10.64

Schedule of Restricted Stock Awards [Table Text Block]

					Aggregate Grant
			Grant Date		Date Fair Value
Grant Date	Shares		Share Price		(Dollars in Thousands)
March 15, 2011	24,836	$	38.46	$	955
July 21, 2011	16,600		38.44		638
August 29, 2011	5,000		24.50		123
February 1, 2012	66,000		30.15		1,990
March 6, 2012	18,347		27.49		504
May 23, 2012	8,000		28.05		224
December 11, 2012	16,330		41.98		686
February 27, 2013	12,973		42.49		551

Schedule of Performance Unit Awards [Table Text Block]

						Aggregate Grant
Incentive				Grant Date		Date Fair Value
Plan	Grant Date	Units		Share Price		(Dollars in Thousands)
2011 - 2013	March 15, 2011	34,002	$	38.46	$	1,308
2012 - 2014	March 6, 2012	43,042		27.49		1,183
2013 - 2015	February 27, 2013	31,418		42.49		1,335

Schedule of Grants, Average Grant Date Fair Value [Table Text Block]

	Average
	Grant date
Incentive Plan	Fair Value	Ten Day Period
2011 - 2013	40.25	February 2011
2012 - 2014	31.80	February 2012
2013 - 2015	43.57	February 2013