Shareholders' Equity Transactions (Tables)

12 Months Ended

Dec. 31, 2013

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

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

The following table summarizes information about stock option activity for the three years ended 2013, 2012 and 2011:

	2013			Weighted Average Exercise Price		2012			Weighted Average Exercise Price		2011			Weighted Average Exercise Price
Options outstanding at January 1	4,664,634			$	26.21	4,455,365			$	28.99	4,484,195			$	29.60
Granted	756,700			14.47		761,892			13.44		608,896			24.57
Exercised	(30,166		)	16.94		(9,417		)	10.70		(178,744		)	23.15
Canceled	(857,386		)	28.63		(543,206		)	31.52		(458,982		)	31.42
Options outstanding at December 31	4,533,782			$	23.86	4,664,634			$	26.21	4,455,365			$	28.99
Options exercise price range at December 31	13.35 to					13.37 to					10.70 to
	$	47.80				$	47.80				$	47.80
Options exercisable at December 31	2,985,175					3,074,275					2,960,317
Options available for grant at December 31*	4,460,337					1,248,033					1,914,574

 ________________________

 * Options available for grant as of December 31, 2013 reduced by net restricted stock award activity of 793,351.

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

The following table summarizes information about stock options outstanding at December 31, 2013:

	Options Outstanding				Options Exercisable
Exercise Prices	Number Outstanding At 12/31/13	Weighted Average Remaining Contractual Life Years	Weighted Average Exercise Price		Number Exercisable At 12/31/13	Weighted Average Exercise Price
$ 13.35 – $15.00	1,332,962	8.9	$	13.96	152,186	$	13.40
$ 15.01 – $25.00	1,580,572	5.4	22.53		1,333,490	22.22
$ 25.01 – $35.00	919,833	5.6	25.73		799,084	25.76
$ 35.01 – $47.80	700,415	1.1	43.25		700,415	43.25
Total	4,533,782	5.8	$	23.86	2,985,175	$	27.65

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:

	2013		2012		2011
Expected dividend yield	0.4	%	0.4	%	0.2	%
Expected stock price volatility	38.2	%	41.0	%	37.3	%
Risk-free interest rate	0.82	%	0.94	%	1.11	%
Expected life in years	6.1		6.0		5.9
Forfeiture percentage	9.2	%	7.6	%	6.9	%