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Other Non-Operating Income (Tables)
 6 Months Ended
Jun. 30, 2020
Other Nonoperating Income (Expense) [Abstract]  
Summary of non-operating income
A summary of non-operating income is as follows:
Three Months Ended 
 June 30		Six Months Ended 
 June 30
(in thousands)2020201920202019
Gain on acquiring a controlling interest in an equity affiliate$3,708  $—  $3,708  $—  
Foreign currency (loss) gain, net(1,070) 109  3,220  623  
Impairment of cost method investments—  —  (2,577) —  
Gain on cost method investments2,571  —  2,571  1,411  
Gain on sale of a business1,653  232  1,760  421  
Gain on sale of equity affiliates1,473  —  1,370  28,994  
Gain on sale of a cost method investment—  —  518  —  
Other (loss) gain, net(235) 887  218  (870) 
Total Other Non-Operating Income$8,100  $1,228  $10,788  $30,579