Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jan. 31, 2018	Apr. 30, 2017
Current assets:
Cash and cash equivalents	$ 138,711	$ 76,717
Receivables	41,507	43,244
Inventories	255,584	201,644
Prepaid expenses	7,197	9,179
Income tax receivable	33,236	19,901
Total current assets	476,235	350,685
Other assets, net of amortization	34,543	23,453
Goodwill	137,759	132,806
Property and equipment, net of accumulated depreciation of $1,591,644 at January 31, 2018 and $1,496,472 at April 30, 2017	2,804,644	2,513,158
Total assets	3,453,181	3,020,102
Current liabilities:
Notes payable to bank	0	900
Current maturities of long-term debt	15,369	15,421
Accounts payable	294,262	293,903
Accrued expenses	151,588	136,322
Total current liabilities	461,219	446,546
Long-term debt, net of current maturities	1,299,311	907,356
Deferred income taxes	324,572	440,124
Deferred compensation	16,488	15,784
Other long-term liabilities	21,788	19,672
Total liabilities	2,123,378	1,829,482
Shareholders’ equity:
Preferred stock, no par value	0	0
Common stock, no par value	2,286	40,074
Retained earnings	1,327,517	1,150,546
Total shareholders’ equity	1,329,803	1,190,620
Total liabilities and shareholders' equity	$ 3,453,181	$ 3,020,102