Cash and Cash Equivalents and Investments in Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2014

Cash, Cash Equivalents, and Short-term Investments [Abstract]

The following is a summary of our marketable securities:



	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value (Net Carrying Amount)
	(In thousands)
December 31, 2014
Certificates of deposit	$	54,000	$	10	$	—		$	54,010
Commercial paper	52,297		7		(4		)	52,300
Corporate debt securities	136,181		1		(94		)	136,088
State and political subdivisions debt securities	231,819		5		(112		)	231,712
Total marketable securities	$	474,297	$	23	$	(210	)	$	474,110



December 31, 2013
Certificates of deposit	$	74,802	$	21	$	(1	)	$	74,822
Commercial paper	78,216		28		—			78,244
Corporate debt securities	96,889		6		(44		)	96,851
State and political subdivisions debt securities	475,235		49		(41		)	475,243
Total marketable securities	$	725,142	$	104	$	(86	)	$	725,160

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References+ Details