Leases-Lease Liability, Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020	Apr. 01, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 685
Lessee, Operating Lease, Liability, Payments, Due Year Two	2,619
Lessee, Operating Lease, Liability, Payments, Due Year Three	2,479
Lessee, Operating Lease, Liability, Payments, Due Year Four	2,535
Lessee, Operating Lease, Liability, Payments, Due Year Five	2,318
Lessee, Operating Lease, Liability, Payments, Due after Year Five	7,913
Lessee, Operating Lease, Liability, Payments, Due	18,549
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(1,984)
Operating lease liability	16,565	$ 18,153	$ 20,335
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	18
Finance Lease, Liability, Payments, Due Year Two	72
Finance Lease, Liability, Payments, Due Year Three	30
Finance Lease, Liability, Payments, Due Year Four	11
Finance Lease, Liability, Payments, Due Year Five	3
Finance Lease, Liability, Payments, Due after Year Five	0
Finance Lease, Liability, Payment, Due	134
Finance Lease, Liability, Undiscounted Excess Amount	(3)
Finance Lease, Liability	$ 131