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Investments in Unconsolidated Subsidiaries (Tables)
3 Months Ended
Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of Condensed Financial Information of Equity Method Investments
Combined condensed financial information for the entities accounted for using the equity method is as follows (dollars in thousands):
Three Months Ended
March 31,
20212020
Revenue$555,856 $411,251 
Operating income275,462 174,534 
Net income368,217 104,528