Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Operating Lease, Liability	$ 37,845		$ 37,845		$ 38,553
Operating Lease, Right-of-Use Asset	37,161		37,161		38,125
Operating Lease, Liability, Current	7,341		7,341		6,924
Operating Lease, Liability, Noncurrent	30,504		30,504		$ 31,629
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability			1,986	$ 311
Operating Lease, Cost	$ 2,251	$ 2,297	4,485	4,572
Short-term Lease Payments			$ 4,344	$ 4,447
Minimum [Member]
Lessee, Operating Lease, Term of Contract	1 year		1 year
Maximum [Member]
Lessee, Operating Lease, Term of Contract	15 years		15 years