Leases (Details) - USD ($)	3 Months Ended	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Mar. 31, 2019
Operating Lease, Payments		$ 4,447,000
Operating Lease, Liability	$ 31,905,000	31,905,000
Operating Lease, Right-of-Use Asset	31,779,000	31,779,000	$ 35,553,000
Operating Lease, Liability, Current	7,308,000	7,308,000
Operating Lease, Liability, Noncurrent	$ 24,597,000	$ 24,597,000
Operating Lease, Weighted Average Remaining Lease Term	6 years 7 days	6 years 7 days
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 311,000
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 4,386,000	4,386,000
Operating Lease, Cost	2,297,000	4,572,000
Short-term Lease, Cost	0	0
Sublease Income	0	0
Variable Lease, Cost	0	0
Lessee, Operating Lease, Liability, Payments, Due Year Two	7,617,000	7,617,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	5,626,000	5,626,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	4,955,000	4,955,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	3,618,000	3,618,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five	10,154,000	10,154,000
Lessee, Operating Lease, Liability, Payments, Due	36,356,000	36,356,000
Receivable with Imputed Interest, Discount	$ 4,451,000	$ 4,451,000
Operating Lease, Weighted Average Discount Rate, Percent	4.22%	4.22%
Minimum [Member]
Lessee, Operating Lease, Term of Contract	1 year	1 year
Maximum [Member]
Lessee, Operating Lease, Term of Contract	15 years	15 years