Stock Based Compensation - Schedule Of Stock Options (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Beginning of Period	29,750		66,050
Weighted Average Exercise Price, Outstanding and exercisable, Beginning of Period	$ 54.46
Options expired, Shares	(7,500)
Options expired, Weighted Average Exercise Price	$ 50.55
Options Outstanding, End of Period	22,250	29,750	66,050
Weighted Average Exercise Price, Outstanding and exercisable, End of Period	$ 55.78	$ 54.46
Weighted Average Remaining Contractual Life	3 months 32 days	6 months
Options expired, Aggregate Intrinsic Value	$ 0	$ 0