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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2015
STOCK-BASED COMPENSATION |
Schedule of stock compensation expense and related net tax benefit |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
($ in thousands) |  | 2015 |  | 2014 |  | 2015 |  | 2014
Compensation expense related to restricted stock awards |  | $ | 3,698 |  |  | $ | 3,565 |  |  | $ | 7,652 |  |  | $ | 6,745 |
Net tax benefit recognized in equity for stock compensation plans |  | $ | 51 |  |  | $ | 79 |  |  | $ | 3,196 |  |  | $ | 3,787 |
Schedule of time-based and performance-based restricted stock awards activity |
| June 30, 2015
| Restricted Stock Awards
| Time-Based |  | Performance-Based
| Shares |  | Weighted Average Price |  | Shares |  | Weighted Average Price
Outstanding at beginning of period | 751,020 |  |  | $ | 30.61 |  |  | 518,553 |  |  | $ | 29.64 |
Granted | 430,078 |  |  | 40.07 |  |  | 149,284 |  |  | 39.95 |
Vested | (213,625 | ) |  | 23.32 |  |  | (144,445 | ) |  | 22.05 |
Forfeited | (37,221 | ) |  | 36.14 |  |  | — |  |  | — |
Outstanding at end of period | 930,252 |  |  | $ | 36.44 |  |  | 523,392 |  |  | $ | 35.64 |

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