Quarterly report pursuant to Section 13 or 15(d)

REVENUE - Changes in Deferred Revenue (Details)

v3.21.2
REVENUE - Changes in Deferred Revenue (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Contract with Customer, Liability [Roll Forward]  
Deferred revenue - beginning balance $ 653,078
Amounts deferred during the period 611,985
Revenue recognized from amounts included in the deferred revenue beginning balance (368,922)
Revenue from current period sales (308,874)
Deferred revenue - ending balance $ 587,267