Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating cash flows used for operating leases	$ 2,610	$ 5,532
Operating cash flows used for finance leases	43	73
Financing cash flows used for finance leases	378	745	$ 0
Cash paid for amounts included in the measurement of lease liabilities	3,031	6,350
Operating leases	159	2,134
Finance leases	773	1,178
Lease liabilities arising from obtaining ROU assets	$ 932	$ 3,312