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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)
9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Other Intangible Assets
Other intangible assets consist of the following (dollars in thousands): 
  At September 30, 2021At December 31, 2020
Useful Life
(Years)
CostAccumulated
Amortization
Net Book
Value
CostAccumulated
Amortization
Net Book
Value
Other intangible assets       
Contract rights under placement fee agreements
3-7
$56,234 $1,886 $54,348 $60,561 $28,108 $32,453 
Customer contracts
3-14
71,975 57,730 14,245 71,975 54,407 17,568 
Customer relationships
8-12
231,100 142,274 88,826 231,100 126,549 104,551 
Developed technology and software
1-6
333,308 274,794 58,514 313,957 255,771 58,186 
Patents, trademarks and other
2-18
19,682 18,994 688 19,682 17,813 1,869 
Total other intangible assets$712,299 $495,678 $216,621 $697,275 $482,648 $214,627