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Acquisition Level 3 (Tables)
 3 Months Ended
Mar. 31, 2020
Business Combination, Separately Recognized Transactions [Line Items]  
Business Combination, Separately Recognized Transactions [Table Text Block]  
Gains (Losses) on Divestitures and Impairment Charges [Table Text Block]
 
Three Months Ended March 31,
 
2020
 
2019
 
(In thousands)
Gains on divestitures, net
$
7,629

 
$
546

Impairment losses
(3,084
)
 
(2,424
)
Gains (losses) on divestitures and impairment charges, net
$
4,545

 
$
(1,878
)