Stock-Based Compensation (Schedule of Share-based Compensation, Stock Options, Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Options
Balance at beginning of year	139,446	144,370	156,522
Granted	5,507	32,399	0
Exercised/Released	(5,250)	0	0
Cancelled / forfeited	(17,326)	(29,213)	(5,715)
Expired	(10,806)	(8,110)	(6,437)
Balance at end of year	111,571	139,446	144,370
Exercisable at end of year	73,665	50,997	73,345
Weighted-average exercise price
Balance at beginning of year	$ 53.66	$ 68.90	$ 68.26
Granted	$ 6.80	$ 4.77	$ 0
Exercised/Released	$ 5.70	$ 0	$ 0
Cancelled / forfeited	$ 124.87	$ 71.78	$ 74.78
Expired	$ 90.72	$ 68.97	$ 48.00
Balance at end of year	$ 38.92	$ 53.66	$ 68.90