Note 13 - Supplemental Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Feb. 28, 2017	Mar. 01, 2016	May 31, 2016
Net cash (used)/provided by operating activities	$ (21,719)	$ 18,539
Purchases of property and equipment	(26,952)	(27,346)
Proceeds from Sale of Property, Plant, and Equipment	22,044	6,193
Insurance proceeds from property claims	358
Reductions in Deferred Compensation Plan assets	1,702	833
Other, net	1,439	2,444
Net cash (used)/provided by investing activities	(1,409)	(18,709)
Principal payments on long-term debt	(10,613)	(12,664)
Stock repurchases	(26)	(10,009)
Payments for debt issuance costs	(947)	(30)
Intercompany dividend
Other intercompany transactions
Net cash (used)/provided by financing activities	(11,586)	(22,703)
Decrease in cash and cash equivalents	(34,714)	(22,873)
Beginning of fiscal year	67,341	75,331	$ 75,331
End of quarter	32,627	52,458	67,341
Investing activities:
Purchases of property and equipment	(26,952)	(27,346)
Proceeds from Sale of Property, Plant, and Equipment	22,044	6,193
Other, net	1,439	2,444
Net cash (used)/provided by investing activities	(1,409)	(18,709)
Financing activities:
Principal payments on long-term debt	(10,613)	(12,664)
Stock repurchases	(26)	(10,009)
Payments for debt issuance costs	(947)	(30)
Intercompany dividend
Other intercompany transactions
Net cash (used)/provided by financing activities	(11,586)	(22,703)
Decrease in cash and cash equivalents	(34,714)	(22,873)
Beginning of fiscal year	67,341	75,331	75,331
End of quarter	32,627	52,458	67,341
Consolidation, Eliminations [Member]
Net cash (used)/provided by operating activities	(11,558)	(15,260)
Purchases of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
Insurance proceeds from property claims
Reductions in Deferred Compensation Plan assets
Other, net
Net cash (used)/provided by investing activities
Principal payments on long-term debt
Stock repurchases
Payments for debt issuance costs
Intercompany dividend	20,541	24,309
Other intercompany transactions	(8,983)	(9,049)
Net cash (used)/provided by financing activities	11,558	15,260
Decrease in cash and cash equivalents
Beginning of fiscal year
End of quarter
Investing activities:
Purchases of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
Other, net
Net cash (used)/provided by investing activities
Financing activities:
Principal payments on long-term debt
Stock repurchases
Payments for debt issuance costs
Intercompany dividend	20,541	24,309
Other intercompany transactions	(8,983)	(9,049)
Net cash (used)/provided by financing activities	11,558	15,260
Decrease in cash and cash equivalents
Beginning of fiscal year
End of quarter
Parent Company [Member]
Net cash (used)/provided by operating activities	(38,058)	(8,133)
Purchases of property and equipment	(21,631)	(19,892)
Proceeds from Sale of Property, Plant, and Equipment	13,471	6,193
Insurance proceeds from property claims	358
Reductions in Deferred Compensation Plan assets	1,702
Other, net	1,439	2,444
Net cash (used)/provided by investing activities	(4,661)	(11,255)
Principal payments on long-term debt	(4)	(2,390)
Stock repurchases	(26)	(10,009)
Payments for debt issuance costs	(947)	(30)
Intercompany dividend
Other intercompany transactions	8,983	9,049
Net cash (used)/provided by financing activities	8,006	(3,380)
Decrease in cash and cash equivalents	(34,713)	(22,768)
Beginning of fiscal year	67,208	75,034	75,034
End of quarter	32,495	52,266	67,208
Investing activities:
Purchases of property and equipment	(21,631)	(19,892)
Proceeds from Sale of Property, Plant, and Equipment	13,471	6,193
Other, net	1,439	2,444
Net cash (used)/provided by investing activities	(4,661)	(11,255)
Financing activities:
Principal payments on long-term debt	(4)	(2,390)
Stock repurchases	(26)	(10,009)
Payments for debt issuance costs	(947)	(30)
Intercompany dividend
Other intercompany transactions	8,983	9,049
Net cash (used)/provided by financing activities	8,006	(3,380)
Decrease in cash and cash equivalents	(34,713)	(22,768)
Beginning of fiscal year	67,208	75,034	75,034
End of quarter	32,495	52,266	67,208
Guarantor Subsidiaries [Member]
Net cash (used)/provided by operating activities	27,897	41,932
Purchases of property and equipment	(5,321)	(7,454)
Proceeds from Sale of Property, Plant, and Equipment	8,573
Insurance proceeds from property claims
Reductions in Deferred Compensation Plan assets
Other, net
Net cash (used)/provided by investing activities	3,252	(7,454)
Principal payments on long-term debt	(10,609)	(10,274)
Stock repurchases
Payments for debt issuance costs
Intercompany dividend	(20,541)	(24,309)
Other intercompany transactions
Net cash (used)/provided by financing activities	(31,150)	(34,583)
Decrease in cash and cash equivalents	(1)	(105)
Beginning of fiscal year	133	297	297
End of quarter	132	192	133
Investing activities:
Purchases of property and equipment	(5,321)	(7,454)
Proceeds from Sale of Property, Plant, and Equipment	8,573
Other, net
Net cash (used)/provided by investing activities	3,252	(7,454)
Financing activities:
Principal payments on long-term debt	(10,609)	(10,274)
Stock repurchases
Payments for debt issuance costs
Intercompany dividend	(20,541)	(24,309)
Other intercompany transactions
Net cash (used)/provided by financing activities	(31,150)	(34,583)
Decrease in cash and cash equivalents	(1)	(105)
Beginning of fiscal year	133	297	297
End of quarter	$ 132	$ 192	$ 133