Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Valuation of money market funds and restricted cash using quoted market prices in active markets for identical assets

Our recurring fair value measurements consist of the following:

	December 31,
	2014		2013
	(In thousands)
Cash equivalent money market funds (Level 1)	$	145,938	$	300,352
Restricted cash money market funds (Level 1)	2,681		2,681

Financial instruments that are not recorded at fair value

The following table presents the fair value of financial instruments that are not recorded at fair value on a recurring basis:

	December 31, 2014				December 31, 2013
	Fair Value		Carrying Value		Fair Value		Carrying Value
	(In thousands)
Senior notes (Level 1)	$	1,268,619	$	1,275,824	$	1,321,443	$	1,276,390
Convertible senior subordinated notes (Level 1)	—		—		102,585		56,350
Term loans (Level 2)	254,999		255,000		320,000		320,000
Total debt	$	1,523,618	$	1,530,824	$	1,744,028	$	1,652,740