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Other Non-Operating Income (Tables)
 9 Months Ended
Sep. 30, 2022
Other Nonoperating Income (Expense) [Abstract]  
Summary of other non-operating income
A summary of non-operating income is as follows:

Three Months Ended 
 September 30

Nine Months Ended 
 September 30
(in thousands)
2022202120222021
Gain on sale of businesses$1,376 $1,303 $3,074 $2,749 
Foreign currency (loss) gain, net(448)(6)(1,973)674 
Gain on sale of cost method investments8 — 1,032 6,793 
Gain on sale of investment in affiliate
— — 604 — 
Gain on cost method investments
560 — 560 10,506 
Other gain, net
862 3,921 3,113 6,938 
Total Other Non-Operating Income
$2,358 $5,218 $6,410 $27,660