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Partners' Capital, Equity and Incentive Compensation Plans (Summary of Award Activity Under 2010 Equity Incentive Plan and 2013 Equity Incentive Plan and Related Information) (Details)
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Ending balance, Options Outstanding (in shares) | shares 200,000
2013 Equity Incentive Plan | Options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning balance, Options Outstanding (in shares) | shares 99,872
Options, Granted (in shares) | shares (24,664)
Options, Cancelled/Expired (in shares) | shares 2,010,046
Beginning balance, Weighted average exercise price options outstanding $ 56.84
Weighted average exercise price options outstanding, Granted 32.74
Weighted average exercise price options outstanding, Cancelled/Expired 38.14
Beginning balance, weighted average fair value, options 9.35
Weighted average fair value, granted, options 6.14
Weighted average fair value, cancelled/expired, options $ 7.18
2013 Equity Incentive Plan | Restricted Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning balance, Options Outstanding (in shares) | shares 263,041
Options, Granted (in shares) | shares (127,165)
Options, Exercised (in shares) | shares (3,739)
Options, Cancelled/Expired (in shares) | shares 521,887
Beginning balance, weighted average fair value, options $ 56.85
Weighted average fair value, granted, options 40.83
Weighted average fair value, vested, options 46.83
Weighted average fair value, cancelled/expired, options $ 48.00
2013 Equity Incentive Plan | Performance-Based Relative TSR Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning balance, Options Outstanding (in shares) | shares 84,202
Options, Cancelled/Expired (in shares) | shares 168,552
Beginning balance, weighted average fair value, options $ 79.18
Weighted average fair value, cancelled/expired, options $ 66.90
2013 Equity Incentive Plan | Performance-Based FFO Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning balance, Options Outstanding (in shares) | shares 84,202
Options, Cancelled/Expired (in shares) | shares 168,552
Beginning balance, weighted average fair value, options $ 56.84
Weighted average fair value, cancelled/expired, options $ 49.42
2010 Equity Incentive Plan | Class O Units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of units, Granted (in shares) | shares 1,875
Number of units, Cancelled/Expired (in shares) | shares 80,435
Weighted average exercise price units, Granted $ 25.00
Weighted average exercise price units, Cancelled/Expired 25.00
Weighted average fair value, Granted 10.26
Weighted average fair value, Cancelled/Expired $ 5.87