Stock-Based Compensation and Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2012

Stock-Based Compensation And Shareholders' Equity [Abstract]

Schedule of Assumptions for Option Pricing Model [Table Text Block]

            Options granted:                                               2012                 2011

            Risk-free interest rate                    0.39%              1.84%

            Dividend yield                              4.68                 4.96

            Volatility                                     33.81               30.04

            Expected life (years)                      5.00                 5.00

Schedule of Stock Option Activity [Table Text Block]

	Number of options	Weighted average exercise price	Weighted average remaining contractual term (in yrs.)	Aggregate intrinsic value of in-the-money options
Outstanding at January 1, 2012	156,275	$       21.93
Exercised	(28,700)	17.21
Forfeited	(12,050)	25.15
Granted	20,000	21.35
Outstanding at September 30, 2012	135,525	$       22.55	2.1	$         559
Exercisable at September 30, 2012	78,625	$       24.50	1.1	$         269