|
Stock-Based Compensation (Details) 4 (USD $)
|
9 Months Ended |
|
Sep. 30, 2014
|
|
LTIP Plan [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date fair value of restricted units outstanding (in dollars per unit) |
$ 44.65 |
|
Assumed Plans [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date fair value of restricted units outstanding (in dollars per unit) |
$ 46.65 |
|
Restricted Stock Units Time Based [Member] | LTIP Plan [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
300,899 |
| Number of restricted units outstanding |
723,933 |
|
Restricted Stock Units Time Based [Member] | Assumed Plans [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
155,615 |
| Number of restricted units outstanding |
263,538 |
|
Restricted Stock Units Time Based [Member] | Straight Line Vesting Basis [Member] | Minimum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
2 years |
|
Restricted Stock Units Time Based [Member] | Straight Line Vesting Basis [Member] | Maximum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
4 years |
|
Restricted Stock Units Time Based [Member] | Cliff Vesting [Member] | Minimum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
3 years |
|
Restricted Stock Units Time Based [Member] | Cliff Vesting [Member] | Maximum [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
4 years |
|
Restricted Stock Units Performance Based [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Vesting period |
3 years |
|
Restricted Stock Units Performance Based [Member] | LTIP Plan [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
392,388 |
| Number of restricted units outstanding |
830,880 |
|
Restricted Stock Units Performance Based [Member] | Assumed Plans [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Number of restricted units granted |
91,516 |
| Number of restricted units outstanding |
86,948 |
|
Restricted Stock Units (RSUs) [Member] | LTIP Plan [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date value of restricted units granted (in dollars per unit) |
$ 44.83 |
|
Restricted Stock Units (RSUs) [Member] | Assumed Plans [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
| Weighted average grant date value of restricted units granted (in dollars per unit) |
$ 44.41 |