Note 4 - Taxes on Income (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 25, 2011	Dec. 26, 2010
Other Noncash Income Tax Expense	$ 13,631,000	$ 14,218,000	$ 14,641,000
Income Tax Expense (Benefit)	13,631,000	12,218,000	10,043,000
Proceeds from Income Tax Refunds		400,000	29,200,000
Unrecognized Tax Benefits, Decreases Resulting from Current Period Tax Positions			(1,700,000)
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration, Change During Year	133,000,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	307,000,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration, Maximum Carrforward Period	20 years
Deferred Tax Assets, Valuation Allowance	200,423,000	116,906,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	1,800,000
Income Taxes Receivable	200,000	100,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	500,000
Expires in 2027 [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	2,000,000
Expires in 2030 [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	76,000,000
Expires in 2031 [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	96,000,000
Expires in 2032 [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	133,000,000
Provision For Addition to Deferred Tax Valuation Allowance [Member]
Other Noncash Income Tax Expense	13,600,000	14,200,000	14,600,000
Other Noncash Income Tax Expense, Next 12 Months	13,100,000
Other Noncash Income Tax Expense, Year Two	12,600,000
Other Noncash Income Tax Expense, Year Three	12,600,000
Tax Amortization [Member]
Amortization of Acquired Intangible Assets	35,000,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	33,700,000
Interest Rate Swap Termination [Member]
Income Tax Expense (Benefit)		(2,000,000)
NOL Carryback Claim [Member]
Proceeds from Income Tax Refunds			$ 2,900,000