Leases, Maturities of Lease Commitments (Details) - USD ($)	Dec. 31, 2020	Mar. 31, 2020
Operating Leases [Abstract]
2021 - remaining three months	$ 2,793,000
2022	10,444,000
2023	9,364,000
2024	8,129,000
2025	8,095,000
Thereafter	69,261,000
Total lease payments	108,086,000
Less amount representing interest	(30,285,000)
Present value of lease liabilities	77,801,000
Finance Leases [Abstract]
2021 - remaining three months	743,000
2022	2,790,000
2023	2,152,000
2024	1,358,000
2025	931,000
Thereafter	300,000
Total lease payments	8,274,000
Less amount representing interest	(738,000)
Present value of lease liabilities	7,536,000
Total [Abstract]
2021 - remaining three months	3,536,000
2022	13,234,000
2023	11,516,000
2024	9,487,000
2025	9,026,000
Thereafter	69,561,000
Total lease payments	116,360,000
Less amount representing interest	(31,023,000)
Present value of lease liabilities	$ 85,337,000	$ 72,493,000