Quarterly report pursuant to Section 13 or 15(d)

UNEARNED REVENUE (Tables)

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UNEARNED REVENUE (Tables)
6 Months Ended
Jun. 30, 2021
Unearned Revenue  
Changes in unearned revenue

UNEARNED REVENUE
    Six Months Ended June 30,  
(in thousands)   2021     2020  
Balance at beginning of year   $ 149,224     $ 136,507  
Deferral of unearned revenue     116,034       105,928  
Recognition of unearned revenue     (92,307 )     (85,936 )
Balance at end of period   $ 172,951     $ 156,499