|
Schedule of Pre-Tax Stock-Based Compensation Expense (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Sep. 30, 2013
|
Sep. 30, 2012
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
| Share-based Compensation Arrangement by Share-based Payment Award | |||||||
| Stock-based compensation expense | $ 5,730 | $ 3,998 | $ 16,292 | $ 11,976 | $ 15,634 | $ 13,107 | $ 9,974 |
|
RSUs
|
|||||||
| Share-based Compensation Arrangement by Share-based Payment Award | |||||||
| Stock-based compensation expense | 4,559 | 2,048 | 12,674 | 6,131 | 8,411 | 3,666 | |
|
Stock Options
|
|||||||
| Share-based Compensation Arrangement by Share-based Payment Award | |||||||
| Stock-based compensation expense | 1,124 | 1,720 | 3,457 | 5,162 | 6,310 | 8,129 | 8,771 |
|
Restricted Stock
|
|||||||
| Share-based Compensation Arrangement by Share-based Payment Award | |||||||
| Stock-based compensation expense | 47 | 230 | 161 | 683 | 913 | 913 | 913 |
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Stock Issued To Non-Employee Directors
|
|||||||
| Share-based Compensation Arrangement by Share-based Payment Award | |||||||
| Stock-based compensation expense | $ 399 | $ 290 | |||||