Cash And Cash Equivalents And Investments In Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2011

Cash And Cash Equivalents And Investments In Marketable Securities [Abstract]

Available-For-Sale Securities

	Available-for-Sale Securities
	Amortized Cost		Gross Unrealized Gain (Loss)			Estimated Fair Value (Net Carrying Amount)
	(In thousands)
September 30, 2011
Marketable debt securities (state and political subdivisions)	$	176,124	$	47		$	176,171
Equity securities		610		(287	)		323
Total marketable securities	$	176,734	$	(240	)	$	176,494
December 31, 2010
Equity securities	$	610	$	733		$	1,343