Variable Interest Entity (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 29, 2013	Jun. 30, 2012	Mar. 30, 2012	Jun. 30, 2011
Current assets:
Cash and cash equivalents	$ 9,997	$ 16,561	$ 13,270	$ 10,829
Restricted investments	6,208	4,413
Total current assets	163,769	154,010
Other assets	14,509	12,853
Total assets	281,226	275,128
Current liabilities:
Current portion of long-term debt	5,521	1,315
Environmental remediation liabilities	290	422
Other accrued liabilities	6,586	4,407
Total current liabilities	121,534	117,559
Long-term debt, net of current portion	767	3,860
Long-term environmental remediation liabilities	5,421	5,473
Total liabilities	200,003	207,080
Variable Interest Entity, Financial or Other Support, Amount	1,383
CAH
Current assets:
Cash and cash equivalents	20	34
Restricted investments	63	63
Total current assets	83	97
Other assets	4,344	4,344
Total assets	4,427	4,441
Current liabilities:
Current portion of long-term debt	2,448	0
Environmental remediation liabilities	0	20
Other accrued liabilities	13	13
Total current liabilities	2,461	33
Long-term debt, net of current portion	0	2,448
Long-term environmental remediation liabilities	14	27
Total liabilities	$ 2,475	$ 2,508