Annual report pursuant to Section 13 and 15(d)

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

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SHARE-BASED COMPENSATION AND OTHER EMPLOYEE BENEFIT PLANS - Components of Net Periodic Pension Cost (Benefit) (Details) - USD ($)
$ in Thousands
5 Months Ended 7 Months Ended 12 Months Ended
Mar. 31, 2020
Oct. 31, 2019
Mar. 31, 2021
Mar. 31, 2019
Share-based Payment Arrangement [Abstract]        
Service cost $ 594 $ 29 $ 743 $ 655
Interest cost 4,109 6,705 9,449 12,984
Expected return on assets (5,735) (5,610) (13,090) (17,118)
Amortization of unrecognized losses 0 0 0 8,001
Net periodic pension cost (gain) $ (1,032) $ 1,124 $ (2,898) $ 4,522