Cash, Cash Equivalents And Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2012

Cash, Cash Equivalents And Marketable Securities [Abstract]

Summary Of The Amortized Costs And Fair Values Of Marketable Securities

	(In Thousands)
	MARKETABLE SECURITIES
	Amortized Cost		Fair Value		Gross Unrealized Gains		Gross Unrealized Losses
September 30, 2012
Tax-exempt Municipal Bonds	$	20,869	$	20,957	$	91	$	3
Variable Rate Demand Notes		32,198		32,198		0		0
Total Marketable Securities	$	53,067	$	53,155	$	91	$	3
December 31, 2011
Tax-exempt Municipal Bonds	$	26,214	$	26,326	$	128	$	16
Variable Rate Demand Notes		33,034		33,034		0		0
Total Marketable Securities	$	59,248	$	59,360	$	128	$	16