Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2012

Fair Value, Assets Measured on Recurring Basis

The following table represents financial assets that we measured at fair value on a recurring basis at September 30, 2012 and 2011, respectively:

September 30, 2012	Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Fair Value as of September 30, 2012
			(In thousands)
Assets:
Cash equivalents (1)	$	644	$	—	$	644
U.S. corporate debt (2)		—		2,008		2,008
U.S. government obligations (2)		—		20,000		20,000
Marketable securities (3)		5,417		—		5,417
Total	$	6,061	$	22,008	$	28,069

September 30, 2011	Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Fair Value as of September 30, 2011
			(In thousands)
Assets:
Cash equivalents (1)	$	67,504	$	—	$	67,504
U.S. corporate debt (2)		—		1,529		1,529
U.S. commercial paper (2)		—		13,993		13,993
U.S. government obligations (2)		—		44,092		44,092
U.S. municipal obligations (2)		—		46,212		46,212
Marketable securities (3)		4,170		—		4,170
Total	$	71,674	$	105,826	$	177,500

(1) Included in cash and cash equivalents on our balance sheet at September 30, 2012 and 2011. Not included in this table are cash deposits of $71.0 million and $68.2 million at September 30, 2012 and 2011, respectively.

(2) Included in current marketable securities on our balance sheet at September 30, 2012 and 2011.

(3) Represents securities held under a supplemental retirement and savings plan for certain officers and senior management employees, which are distributed upon termination or retirement of the employees. Included in long-term marketable securities on our balance sheet at September 30, 2012 and 2011.