Fair Value Of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Of Financial Instruments [Abstract]

Financial Instruments Measured At Fair Value On Recurring Basis

	Carrying Amount		Estimated Fair Value		Assets and Liabilities Measured at Fair Value		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Cash and cash equivalents:
Cash	$	6,640	$	6,640	$	6,640	$	6,640	$	—	$	—
Money market funds		148,133		148,133		148,133		148,133		—		—
Total cash and cash equivalents		154,773		154,773		154,773		154,773		—		—
Short-term investments (available-for-sale):
Equity securities		—		—		—		—		—		—
Short-term investments (held-to-maturity):
Certificates of deposit		47,935		47,935		—		—		—		—
Total short-term investments		47,935		47,935		—		—		—		—
Total cash and cash equivalents and short-term investments		202,708		202,708		154,773		154,773		—		—
Long-term investments (held-to-maturity)
Certificates of deposit		1,280		1,280		—		—		—		—
Total long-term investments		1,280		1,280		—		—		—		—
Total	$	203,988	$	203,988	$	154,773	$	154,773	$	—	$	—