RECEIVABLES, CONTRACT ASSETS, AND DEFERRED REVENUE- Contract Effective (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Receivables [Abstract]
2020	$ 40,533
2019	102,154
2018	55,484
2017	44,691
2016 and prior	49,930
Unbilled Revenue Total	$ 292,792
2020	14.00%
2019	35.00%
2018	19.00%
2017	15.00%
2016 and prior	17.00%
Total Percentage of Unbilled Revenue	100.00%