Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Apr. 30, 2013
Current assets:
Cash and cash equivalents	$ 102,160	$ 41,271
Receivables	25,067	20,900
Inventories	190,839	189,514
Prepaid expenses	2,092	1,396
Deferred income taxes	12,096	9,916
Income tax receivable	13,403	9,820
Total current assets	345,657	272,817
Other assets, net of amortization	15,453	14,485
Goodwill	120,081	114,791
Property and equipment, net of accumulated depreciation of $1,029,303 at January 31, 2014 and $952,286 at April 30, 2013	1,745,011	1,581,925
Total assets	2,226,202	1,984,018
Current liabilities:
Notes payable to bank		59,100
Current maturities of long-term debt	8,177	15,810
Accounts payable	201,812	232,913
Accrued expenses	109,568	89,925
Total current liabilities	319,557	397,748
Long-term debt, net of current maturities	853,739	653,081
Deferred income taxes	309,918	293,708
Deferred compensation	16,440	15,787
Other long-term liabilities	24,795	21,399
Total liabilities	1,524,449	1,381,723
Shareholders’ equity:
Preferred stock, no par value	0
Common stock, no par value	31,647	23,119
Retained earnings	670,106	579,176
Total shareholders’ equity	701,753	602,295
	$ 2,226,202	$ 1,984,018