|
Stock-Based Compensation (Details) 4 (USD $)
|
6 Months Ended |
|
Jun. 30, 2013
|
|
Restricted Stock Units Performance Based
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
3 years |
|
LTIP Plan | Restricted Stock Units Time Based
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
251,970 |
| Number of restricted units outstanding |
726,374 |
|
LTIP Plan | Restricted Stock Units Performance Based
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
253,980 |
| Number of restricted units outstanding |
682,216 |
|
LTIP Plan | Restricted Stock Units (RSUs)
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date value of resticted units granted (per unit) |
$ 56.25 |
|
Catalyst | Restricted Stock Units Time Based
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
103,870 |
| Number of restricted units outstanding |
218,854 |
|
Catalyst | Restricted Stock Units Performance Based
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
21,340 |
| Number of restricted units outstanding |
13,280 |
|
Catalyst | Restricted Stock Units (RSUs)
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date value of resticted units granted (per unit) |
$ 55.82 |
|
Straight Line Vesting Basis | Restricted Stock Units Time Based | Minimum
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
2 years |
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Straight Line Vesting Basis | Restricted Stock Units Time Based | Maximum
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
4 years |
|
Cliff Vesting | Restricted Stock Units Time Based | Minimum
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
3 years |
|
Cliff Vesting | Restricted Stock Units Time Based | Maximum
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
4 years |