Short-term Investments (Tables)

12 Months Ended

Dec. 31, 2011

Short-term Investments [Abstract]

Schedule Of Short Term Investments

	(In thousands)
	December 31,
	2011		2010
Certificates of deposit	$	775,000	$	800,363
Corporate debt		103,506		—
Federal Home Loan Bank obligations		185,500		—
Variable rate demand notes		298,635		353,260
	$	1,362,641	$	1,153,623