Quarterly report pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION AND OTHER EMPLOYEE BENEFIT PLANS - Components of Net Periodic Pension Cost (Details)

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SHARE-BASED COMPENSATION AND OTHER EMPLOYEE BENEFIT PLANS - Components of Net Periodic Pension Cost (Details) - USD ($)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended
Oct. 31, 2019
Dec. 31, 2019
Dec. 31, 2020
Oct. 31, 2019
Dec. 31, 2020
Share-based Payment Arrangement [Abstract]          
Service cost for benefits earned during the period $ 52 $ 106 $ 109 $ 363 $ 704
Interest cost on pension benefit obligation 958 1,658 839 6,676 5,415
Expected return on assets (1,315) (2,314) (1,161) (9,161) (7,501)
Prior service costs 12 0 0 81 0
Amortization of unrecognized losses 676 0 0 4,713 0
Net periodic pension cost $ 383 $ (550) $ (213) $ 2,672 $ (1,382)