v2.4.0.8
Long-Term Incentive Plan (Total Non-Vested Unit Awards) (Details) (Management [Member], USD $)
In Millions, except Share data, unless otherwise specified
Dec. 31, 2013
Long Term Incentive Plan [Line Items]  
Unit Awards Granted 581,413
Estimated Forfeitures 82,559
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results 375,569
Total Unit Award Accrual 874,423
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 19.8 [1]
2012 Awards [Member] | Performance Shares [Member]
  
Long Term Incentive Plan [Line Items]  
Unit Awards Granted 267,322
Estimated Forfeitures 39,225
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results 228,097
Total Unit Award Accrual 456,194
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 6.0 [1]
2013 Awards [Member] | Performance Shares [Member]
  
Long Term Incentive Plan [Line Items]  
Unit Awards Granted 228,498
Estimated Forfeitures 31,869
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results 147,472
Total Unit Award Accrual 344,101
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 12.4 [1]
Retention Awards Vesting 2014 [Member] | Retention Awards [Member]
  
Long Term Incentive Plan [Line Items]  
Unit Awards Granted 71,849
Estimated Forfeitures 10,778
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results 0
Total Unit Award Accrual 61,071
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 0.7 [1]
Retention Awards Vesting 2015 [Member] | Retention Awards [Member]
  
Long Term Incentive Plan [Line Items]  
Unit Awards Granted 444
Estimated Forfeitures 22
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results 0
Total Unit Award Accrual 422
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 0 [1]
Retention Awards Vesting 2016 [Member] | Retention Awards [Member]
  
Long Term Incentive Plan [Line Items]  
Unit Awards Granted 13,300
Estimated Forfeitures 665
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results 0
Total Unit Award Accrual 12,635
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 0.7 [1]
[1] Unrecognized compensation expense will be recognized over the remaining vesting period of the awards.