Shareholders' Equity Transactions (Tables)

3 Months Ended

Mar. 31, 2014

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

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

The amount of amount of stock-based compensation expense recognized under the provisions of Compensation-Stock Compensation, ASC 718 was as follows (in thousands):

	For the Three Months Ended March 31,
	2014		2013
Stock-based compensation expense recognized as part of selling, general and administrative expense	$	699	$	1,160

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

The following table summarizes information about stock option activity for the three months ended March 31, 2014:

	March 31, 2014			Weighted Average Exercise Price
Options outstanding at January 1, 2014	4,533,782			$	23.86
Granted	—			—
Exercised	(5,411		)	15.75
Canceled	(109,302		)	28.13
Options outstanding at March 31, 2014	4,419,069			$	23.97
Options exercise price range at March 31, 2014	$ 12.42 to
	$	47.80
Options exercisable at March 31, 2014	2,967,156
Shares available for grant at March 31, 2014*	3,625,869

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

The following table summarizes information about stock options outstanding at March 31, 2014:

	Options Outstanding				Options Exercisable
Exercise Prices	Number Outstanding At 3/31/14	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price		Number Exercisable At 3/31/14	Weighted Average Exercise Price
$ 12.42 – $15.00	1,256,124	7.9	$	13.95	461,239	$	13.78
$ 15.01 – $25.00	1,563,747	4.4	22.52		1,419,474	22.38
$ 25.01 – $35.00	912,383	4.5	25.73		893,223	25.71
$ 35.01 – $47.80	686,815	0.3	43.23		667,740	43.22
Total	4,419,069	4.8	$	23.97	3,441,676	$	26.13