|
Stock-Based Compensation (Details) 4 (USD $)
|
3 Months Ended |
|
Mar. 31, 2014
|
|
Restricted Stock Units Performance Based [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
3 years |
|
LTIP Plan [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date fair value of restricted units outstanding (per unit) |
$ 44.49 |
|
LTIP Plan [Member] | Restricted Stock Units Time Based [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
292,984 |
| Number of restricted units outstanding |
775,207 |
|
LTIP Plan [Member] | Restricted Stock Units Performance Based [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
392,388 |
| Number of restricted units outstanding |
847,220 |
|
LTIP Plan [Member] | Restricted Stock Units (RSUs) [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date value of restricted units granted (per unit) |
$ 44.84 |
|
Assumed Plans [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date fair value of restricted units outstanding (per unit) |
$ 47.31 |
|
Assumed Plans [Member] | Restricted Stock Units Time Based [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
144,607 |
| Number of restricted units outstanding |
316,990 |
|
Assumed Plans [Member] | Restricted Stock Units Performance Based [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
67,064 |
| Number of restricted units outstanding |
73,378 |
|
Assumed Plans [Member] | Restricted Stock Units (RSUs) [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date value of restricted units granted (per unit) |
$ 44.71 |
|
Straight Line Vesting Basis [Member] | Restricted Stock Units Time Based [Member] | Minimum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
2 years |
|
Straight Line Vesting Basis [Member] | Restricted Stock Units Time Based [Member] | Maximum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
4 years |
|
Cliff Vesting [Member] | Restricted Stock Units Time Based [Member] | Minimum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
3 years |
|
Cliff Vesting [Member] | Restricted Stock Units Time Based [Member] | Maximum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
4 years |