Share-based Compensation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013
2012 Grant [Member]
Analysis of SARs outstanding
SARs outstanding (in shares)	111,694
Vested and exercisable (in shares)	5,767
Vesting period	3 years
Expiration dates	Feb. 24, 2019
Weighted average exercise price (in dollars per share)	$ 29.31
Risk-free interest rate	0.80%
Expected dividend yield	2.20%
Forfeiture Rate on unvested SARs	2.00%
2012 Grant [Member] | Minimum [Member]
Analysis of SARs outstanding
Expected volatility range, minimum	52.00%
Expected life range (in years)	2 years 6 months
2012 Grant [Member] | Maximum [Member]
Analysis of SARs outstanding
Expected volatility range, maximum	52.50%
Expected life range (in years)	3 years 1 month 6 days
2011 Grant [Member]
Analysis of SARs outstanding
SARs outstanding (in shares)	76,408
Vested and exercisable (in shares)	14,792
Vesting period	3 years
Expiration dates	May 09, 2018
Weighted average exercise price (in dollars per share)	$ 24.45
Risk-free interest rate	0.40%
Expected dividend yield	2.20%
Forfeiture Rate on unvested SARs	2.00%
2011 Grant [Member] | Minimum [Member]
Analysis of SARs outstanding
Expected volatility range, minimum	43.30%
Expected life range (in years)	2 years 2 months 12 days
2011 Grant [Member] | Maximum [Member]
Analysis of SARs outstanding
Expected volatility range, maximum	52.00%
Expected life range (in years)	2 years 3 months 18 days
2010 Grant [Member]
Analysis of SARs outstanding
SARs outstanding (in shares)	12,832
Vested and exercisable (in shares)	12,832
Vesting period	3 years
Weighted average exercise price (in dollars per share)	$ 12.95
Expected volatility range	42.50%
Risk-free interest rate	0.40%
Expected dividend yield	2.20%
2010 Grant [Member] | Minimum [Member]
Analysis of SARs outstanding
Grant date	Mar. 31, 2010
Expiration dates	Mar. 31, 2017
Expected life range (in years)	1 year 7 months 6 days
2010 Grant [Member] | Maximum [Member]
Analysis of SARs outstanding
Grant date	May 14, 2010
Expiration dates	May 14, 2017
Expected life range (in years)	1 year 8 months 12 days
2009 Grant [Member]
Analysis of SARs outstanding
SARs outstanding (in shares)	5,800
Vested and exercisable (in shares)	5,800
Vesting period	4 years
Expiration dates	Mar. 03, 2016
Weighted average exercise price (in dollars per share)	$ 6.71
Expected volatility range	39.20%
Expected life range (in years)	1 year 1 month 6 days
Risk-free interest rate	0.10%
Expected dividend yield	2.20%
2008 Grant [Member]
Analysis of SARs outstanding
SARs outstanding (in shares)	500
Vested and exercisable (in shares)	500
Vesting period	4 years
Expiration dates	Apr. 28, 2015
Weighted average exercise price (in dollars per share)	$ 20.88
Expected volatility range	34.30%
Expected life range (in years)	8 months 12 days
Risk-free interest rate	0.10%
Expected dividend yield	2.20%