|
Income Taxes (Narrative) (Details) (USD $)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Alternative minimum tax carryback refund | $ 9,600,000 | ||
| Income refund receivable | 5,600,000 | ||
| Federal tax benefits | (3,213,000) | (4,038,000) | (5,803,000) |
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 8,400,000 | ||
| Change in unrecognized tax benefits | 1,693,000 | 0 | 0 |
| Unrecognized tax benefits | 8,376,000 | 9,255,000 | 3,213,000 |
|
Stock Compensation Plan [Member]
|
|||
| Unrecognized Tax Benefits Resulting in Net Operating Loss Carryforward | 55,300,000 | 42,700,000 | |
| Operating loss carryforwards | 100,000,000 | ||
|
Discrete Events, Including Acquisitions [Member]
|
|||
| Federal tax benefits | 19,800,000 | ||
|
Alternative Minimum Tax Credit Carryforward [Member]
|
|||
| Income refund receivable | 4,000,000 | ||
|
U.S. Federal [Member]
|
|||
| Operating loss carryforwards | 2,500,000,000 | ||
| Change in unrecognized tax benefits | (3,200,000) | ||
|
U.S. Federal [Member] | Starting [Member]
|
|||
| Operating loss carryforwards, expiration dates | 2021 | ||
|
U.S. Federal [Member] | Ending [Member]
|
|||
| Operating loss carryforwards, expiration dates | 2030 | ||
|
State [Member]
|
|||
| Operating loss carryforwards | 1,100,000,000 | ||
| Unrecognized tax benefits | 8,400,000 | ||
|
State [Member] | Starting [Member]
|
|||
| Operating loss carryforwards, expiration dates | 2012 | ||
|
State [Member] | Ending [Member]
|
|||
| Operating loss carryforwards, expiration dates | 2031 | ||
|
Foreign [Member]
|
|||
| Operating loss carryforwards | $ 100,000,000 | ||