Fair Value Measurements (Tables)

3 Months Ended

Dec. 27, 2013

Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]

Schedule Of Financial Assets and Liabilities Carried At Fair Value

Financial assets and liabilities carried at fair value are classified below (in thousands):

	December 27, 2013
	Level 1	Level 2	Level 3	Total
Assets:
Investments held in supplemental retirement plan (1)	$2,316	$—	$—	$2,316
Money market funds (2)	2,813	—	—	2,813
U.S. agency securities (2), (3), (4)	58,047	—	—	58,047
Commercial paper (2), (3), (4)	—	20,618	—	20,618
Corporate bonds (3), (4)	—	123,953	—	123,953
Municipal debt securities (3), (4)	—	273,407	—	273,407
Total	$63,176	$417,978	$—	$481,154
Liabilities:
Investments held in supplemental retirement plan (5)	$2,316	$—	$—	$2,316
Total	$2,316	$—	$—	$2,316

	September 27, 2013
	Level 1	Level 2	Level 3	Total
Assets:
Investments held in supplemental retirement plan (1)	$2,242	$—	$—	$2,242
Money market funds (2)	16,193	—	—	16,193
U.S. agency securities (2), (3), (4)	60,066	—	—	60,066
Commercial paper (2), (3)	—	10,991	—	10,991
Corporate bonds (3), (4)	—	134,238	—	134,238
Municipal debt securities (3), (4)	—	256,445	—	256,445
Total	$78,501	$401,674	$—	$480,175
Liabilities:
Investments held in supplemental retirement plan (5)	$2,242	$—	$—	$2,242
Total	$2,242	$—	$—	$2,242

(1) These assets are included within prepaid expenses and other current assets and within other non-current assets.

(2) These assets are included within cash and cash equivalents.

(3) These assets are included within short-term investments.

(4) These assets are included within long-term investments.

(5) These liabilities are included within accrued liabilities and within other non-current liabilities.