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UNEARNED REVENUE (Tables)
9 Months Ended
Sep. 30, 2020
Unearned Revenue  
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

UNEARNED REVENUE
For the period ended  September 30,   December 31,   September 30, 
(in thousands)  2020   2019   2019 
Balance at beginning of year  $136,507   $127,075   $127,075 
Deferral of unearned revenue   150,510    174,404    141,867 
Recognition of unearned revenue   (129,377)   (164,972)   (122,465)
Balance at end of period  $157,640   $136,507   $146,477