Cash and Cash Equivalents and Short-term Investments (Tables)

6 Months Ended

Jun. 30, 2015

Cash and Cash Equivalents and Short-term Investments

Certain information related to our cash and cash equivalents and short term investments

	June 30, 2015						December 31, 2014
	Fair Value		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses
	(In thousands)
Cash and cash equivalents	$	436,675	$	—	$	—	$	501,149	$	—	$	—
Short-term investments:
Available-for-sale equity securities	33,205		12,851		—		35,002		14,648		—
Available-for-sale debt securities:
Mortgage-CMO debt securities	17		—		—		18		—		(1		)
Total short-term investments	33,222		12,851		—		35,020		14,648		(1		)
Total cash, cash equivalents and short-term investments	$	469,897	$	12,851	$	—	$	536,169	$	14,648	$	(1	)

Available-for-sale of Debt and equity securities

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2015		2014		2015		2014
	(In thousands)				(In thousands)
Available-for-sale
Proceeds from sales and maturities	$	—	$	22,178	$	—	$	22,313
Realized gains (losses), net	$	—	$	4,903	$	—	$	4,903