Stock, Stock Options and Rights Schedule Stock Option Plans (Details) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized	59,693
Available	4,975
Outstanding	33,241		29,547	28,436	30,101
1996 Stock Incentive Program(1)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized	34,815	[1]
Available	1,039	[1]
Outstanding	12,860	[1]
1998 Nonstatutory Stock Option Plan(2)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized	37	[2]
Available	0	[2]
Outstanding	37	[2]
2008 Inducement Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized	1,800
Available	184
Outstanding	1,316
2009 Incentive Plan(1)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized	19,041	[1]
Available	758	[1]
Outstanding	18,022	[1]
2012 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized	4,000
Available	2,994
Outstanding	1,006

[1] Shares are only available for issuance under the 2012 Incentive Plan after reregistration.

[2] Shares will be retired upon cancellation.