Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jan. 31, 2021	Apr. 30, 2020
Current assets:
Cash and cash equivalents	$ 388,946	$ 78,275
Receivables	66,617	48,500
Inventories	271,421	236,007
Prepaid expenses	17,794	9,801
Income taxes receivable	0	14,667
Total current assets	744,778	387,250
Other assets, net of amortization	78,210	71,766
Goodwill	161,075	161,075
Property and equipment, net of accumulated depreciation of $2,151,436 at January 31, 2021 and $2,037,708 at April 30, 2020	3,412,924	3,323,801
Total assets	4,396,987	3,943,892
Current liabilities:
Lines of credit	0	120,000
Current maturities of long-term debt and finance lease obligations	2,327	570,280
Accounts payable	332,103	184,800
Accrued expenses	245,519	188,348
Income taxes payable	1,877	0
Total current liabilities	581,826	1,063,428
Long-term debt and finance lease obligations, net of current maturities	1,362,076	714,502
Deferred income taxes	449,152	435,598
Deferred compensation	14,636	13,604
Insurance accruals, net of current portion	21,103	22,862
Other long-term liabilities	74,605	50,693
Total liabilities	2,503,398	2,300,687
Shareholders’ equity:
Preferred stock, no par value	0	0
Common stock, no par value	48,855	33,286
Retained earnings	1,844,734	1,609,919
Total shareholders’ equity	1,893,589	1,643,205
Total liabilities and shareholders' equity	$ 4,396,987	$ 3,943,892