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Partners' Equity and Equity-Based Compensation Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
May 31, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Special L.P. interests $ 5,290,000 $ 5,290,000    
Total intrinsic value of options exercised $ 100,000 $ 200,000 $ 700,000  
2016 Omnibus incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unit options and other forms of equity authorized under equity incentive plan (in shares)       2,800,000
Options granted (in shares) 0      
2008 Omnibus Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unit options and other forms of equity authorized under equity incentive plan (in shares)       2,500,000
Awards Payable in Equity        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Distribution equivalent liability $ 1,800,000      
Awards Payable in Equity | Other Accrued Liabilities        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Distribution equivalent liability 1,000,000.0      
Awards Payable in Equity | Other Liabilities        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Distribution equivalent liability $ 700,000      
Performance units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-option equity instruments awarded (in shares) 131,000      
Performance units | Awards Payable in Cash or Equity        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-option equity instruments awarded (in shares) 0      
Award vesting period 3 years      
Performance units | Awards Payable in Equity        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unamortized compensation related to unvested phantom unit awards $ 10,600,000      
Period to achieve performance targets 3 years      
Unamortized compensation related to unvested phantom unit awards, period for recognition 2 years 4 months 24 days      
Distribution Equivalent Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-option equity instruments awarded (in shares) 3,000      
Deferred units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-option equity instruments awarded (in shares) 3,000      
Deferred units | Awards Payable in Cash or Equity        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 1 year      
Aggregate market value of contingently issuable units $ 2,700,000      
Unamortized compensation related to unvested phantom unit awards $ 0      
Forfeitable Distribution-Equivalent Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-option equity instruments awarded (in shares) 21,000      
Restricted units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-option equity instruments awarded (in shares) 77,000      
Award vesting period 3 years      
Restricted units | Tranche One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 2 years      
Vested (in shares) 32,154      
Restricted units | Tranche Two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 3 years      
Vested (in shares) 82,500      
Restricted units | Awards Payable in Equity        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unamortized compensation related to unvested phantom unit awards $ 8,400,000      
Unamortized compensation related to unvested phantom unit awards, period for recognition 2 years 2 months 12 days      
2013 and 2012 Option Awards | Awards Payable in Equity        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 3 years      
Expected term, maximum 10 years      
Fixed Price Options | 2008 Omnibus Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unit options outstanding (in shares) 361,546      
Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Range of exercise prices, lower limit (in dollars per share) $ 29.53      
Range of exercise prices, upper limit (in dollars per share) $ 36.95