Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 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 March 31, 2012 and September 30, 2011, respectively:

March 31, 2012	Active Markets  for Identical Instruments (Level 1)		Significant Other Observable  Inputs (Level 2)		Fair Value as  of March 31, 2012
	(In thousands)
Assets:
Cash equivalents (1)	$	88,587	$	—	$	88,587
U.S. certificates of deposits (2)		—		5,001		5,001
U.S. corporate debt (2)		—		2,023		2,023
U.S. commerical paper (2)		—		10,998		10,998
Non-U.S. commerical paper (2)		—		4,997		4,997
U.S. government obligations (2)		—		22,030		22,030
Marketable securities (3)		5,036		—		5,036
Total	$	93,623	$	45,049	$	138,672

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 March 31, 2012 and September 30, 2011. Not included in this table are cash deposits of $57.4 million and $68.2 million at March 31, 2012 and September 30, 2011, respectively.

(2) Included in current marketable securities on our balance sheet at March 31, 2012 and September 30, 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 March 31, 2012 and September 30, 2011.