Assets Held For Sale (Details) (USD $)	Jun. 25, 2011
Total long-term assets	$ 119,182,000
Total current liabilities	19,493,000
Total long-term liabilities	1,039,000
Cash [Member] | Filterfresh [Member]
Total current assets	8,248,000
Accounts Receivable [Member] | Filterfresh [Member]
Total current assets	12,231,000
Inventories [Member] | Filterfresh [Member]
Total current assets	6,871,000
Other Current Assets [Member] | Filterfresh [Member]
Total current assets	953,000
Fixed Assets [Member] | Filterfresh [Member]
Total long-term assets	36,277,000
Intangibles [Member] | Filterfresh [Member]
Total long-term assets	19,550,000
Goodwill [Member] | Filterfresh [Member]
Total long-term assets	62,838,000
Other Long-term Assets [Member] | Filterfresh [Member]
Total long-term assets	517,000
Current Portion of Long-term Debt [Member] | Filterfresh [Member]
Total current liabilities	629,000
Accounts Payable [Member] | Filterfresh [Member]
Total current liabilities	3,005,000
Accrued Compensation [Member] | Filterfresh [Member]
Total current liabilities	2,410,000
Accrued Expenses [Member] | Filterfresh [Member]
Total current liabilities	2,540,000
Income Taxes Payable [Member] | Filterfresh [Member]
Total current liabilities	15,000
Deferred Income Tax Liabilities [Member] | Filterfresh [Member]
Total current liabilities	10,894,000
Long-term Debt [Member] | Filterfresh [Member]
Total long-term liabilities	270,000
Other Long-Term Liabilities [Member] | Filterfresh [Member]
Total long-term liabilities	769,000
Filterfresh [Member]
Total current assets	28,303,000
Total long-term assets	119,182,000
Total current liabilities	19,493,000
Total long-term liabilities	1,039,000
Allowance for uncollectible accounts	$ 300,000