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Other Assets (Tables)
 12 Months Ended
Dec. 31, 2022
Other Assets [Abstract]  
Schedule of Other Assets [Table Text Block] Other assets in Operating Entities are as follows:
 As of December 31,
 20222021
 (dollars in thousands)
Prepaid expenses$28,305 $21,349 
Tax receivables11,806 6,971 
Interest and dividends receivable15,210 2,147 
Receivable on sale of investment4,000 — 
Other (b)25,642 24,288 
$84,963 $54,755