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Related-Party Transactions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Information on related party transaction      
Receivables from related parties $ 7,823 $ 5,435  
GPC      
Information on related party transaction      
Receivables from related parties $ 53 23  
GPC | GPC Amended and Restated Services Agreement [Member]      
Related Party Transactions      
Notice period to terminate the receipt of services under the agreement 90 days    
General Partner, Global GP LLC      
Information on related party transaction      
Expenses incurred from transactions with related parties $ 118,500 104,800 $ 106,000
Receivables from related parties $ 7,770 $ 5,412  
GPC | Slifka Family [Member]      
Related Party Transactions      
Ownership interest, as a percent 100.00%