Shareholders' Equity Transactions (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table summarizes information about stock option activity for the nine months ended September 30, 2013:

	September 30, 2013			Weighted Average Exercise Price
Options outstanding at January 1, 2013	4,664,634			$	26.21
Granted	756,700			14.47
Exercised	—			—
Canceled	(792,584		)	28.74
Options outstanding at September 30, 2013	4,628,750			$	23.86
Options exercise price range at September 30, 2013	$ 12.42 to
	$	47.80
Options exercisable at September 30, 2013	3,070,364
Options available for grant at September 30, 2013*	4,460,337

Schedule of Share-based Compensation, Stock Options Outstanding [Table Text Block]

The following table summarizes information about stock options outstanding at September 30, 2013:

	Options Outstanding				Options Exercisable
Exercise Prices	Number Outstanding At 9/30/13	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price		Number Exercisable At 9/30/13	Weighted Average Exercise Price
$ 12.42 – $15.00	1,354,435	9.2	$	13.95	166,045	$	13.38
$ 15.01 – $25.00	1,613,291	5.6	22.51		1,364,559	22.21
$ 25.01 – $35.00	950,109	5.7	25.81		828,846	25.85
$ 35.01 – $47.80	710,915	1.4	43.21		710,914	43.21
Total	4,628,750	6.0	$	23.86	3,070,364	$	27.57