Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Fair value of assets measured on recurring basis

	Total		Level 1		Level 2		Level 3
	(In thousands)
Corporate debt securities	$	208,862	$	—	$	208,862	$	—
Government-sponsored enterprise securities (GSEs)		33,066		33,066		—		—
Municipal securities		73,899		—		73,899		—
U.S. treasury notes		33,691		33,691		—		—
Certificates of deposit		7,377		—		7,377		—
Auction rate securities		13,523		—		—		13,523
Total assets at fair value	$	370,418	$	66,757	$	290,138	$	13,523
Interest rate swap liability	$	1,270	$	—	$	1,270	$	—

	Total		Level 1		Level 2		Level 3
	(In thousands)
Corporate debt securities	$	231,634	$	—	$	231,634	$	—
GSEs		33,949		33,949		—		—
Municipal securities		47,313		—		47,313		—
U.S. treasury notes		21,748		21,748		—		—
Certificates of deposit		2,272		—		2,272		—
Auction rate securities		16,134		—		—		16,134
Total assets at fair value	$	353,050	$	55,697	$	281,219	$	16,134
Interest rate swap liability	$	—	$	—	$	—	$	—

Fair value of assets measured on recurring basis using unobservable inputs

	(Level 3)
	(In thousands)
Balance at December 31, 2011	$	16,134
Total gains (unrealized only):
Included in other comprehensive income		1,439
Settlements		(4,050	)
Balance at September 30, 2012	$	13,523
The amount of total unrealized gains for the period included in other comprehensive income attributable to the change in accumulated other comprehensive losses relating to assets still held at September 30, 2012	$	903