Stock Compensation Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Options - Outstanding (in shares)	86,250
Options - Granted (in shares)	0
Options - Exercised (in shares)	(1,500)
Options - Forfeited (in shares)	0
Options - Outstanding (in shares)	84,750
Options - Exercisable (in shares)			82,000
Weighted-Average Exercise Price - Outstanding (in dollars per share)	$ 24.79
Weighted-Average Exercise Price - Granted (in dollars per share)	$ 0
Weighted-Average Exercise Price - Exercised (in dollars per share)	$ 13.5
Weighted-Average Exercise Price - Forfeited (in dollars per share)	$ 0
Weighted-Average Exercise Price - Outstanding (in dollars per share)	$ 24.99
Weighted-Average Exercise Price - Exercisable (in dollars per share)	$ 25.27
Aggregate Intrinsic Value - Outstanding	$ 0
Aggregate Intrinsic Value - Granted	$ 0
Aggregate Intrinsic Value - Exercised	0
Aggregate Intrinsic Value - Forfeited	$ 0
Aggregate Intrinsic Value - Outstanding	0
Aggregate Intrinsic Value - Exercisable	$ 0
Weighted-Average Remaining Term - Outstanding (in years)	4 years 7 months 6 days	4 years 10 months 24 days
Weighted-Average Remaining Term - Granted (in years)	0 years
Weighted-Average Remaining Term - Exercised (in years)	0 years
Weighted-Average Remaining Term - Forfeited (in years)	0 years
Weighted-Average Remaining Term - Exercisable (in years)	4 years 6 months