|
Stock Options (Summary of Stock Options Exercisable) (Details) (USD $)
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|---|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Options Exercisable, Number Exercisable | 1,013,848 | 2,281,298 | 210,520 |
| Weighted Average Exercise Price, Options exercisable | $ 11.36 | $ 7.32 | $ 16.44 |
|
Minimum [Member]
|
|||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Weighted Average Exercise Price, Options exercisable | $ 2.21 | $ 2.21 | $ 9.30 |
|
Maximum [Member]
|
|||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Weighted Average Exercise Price, Options exercisable | $ 74.95 | $ 46.87 | $ 26.15 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|