Financial Instruments and Fair Value Disclosures (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis

Assets and liabilities measured at fair value are summarized below:

	September 30, 2013
	Fair Value Measurements Using							Assets at Fair Value
	Level 1		Level 2			Level 3
	(In thousands)
Recurring fair value measurements:
Assets:
Short-term investments	$	1,205,626	$	—		$	—	$	1,205,626
FOREX contracts		—		3,272			—		3,272
Mortgage-backed securities		—		224			—		224
Total assets	$	1,205,626	$	3,496		$	—	$	1,209,122
Liabilities:
FOREX contracts	$	—	$	(4,304	)	$	—	$	(4,304	)
Nonrecurring fair value measurements:
Assets:
Assets held for sale	$	—	$	—		$	3,900	$	3,900

	December 31, 2012
	Fair Value Measurements Using							Assets at Fair Value
	Level 1		Level 2			Level 3
	(In thousands)
Recurring fair value measurements:
Assets:
Short-term investments	$	1,434,751	$	—		$	—	$	1,434,751
FOREX contracts		—		3,627			—		3,627
Mortgage-backed securities		—		301			—		301
Total assets	$	1,434,751	$	3,928		$	—	$	1,438,679
Liabilities:
FOREX contracts	$	—	$	(29	)	$	—	$	(29	)
Nonrecurring fair value measurements:
Assets:
Assets held for sale	$	—	$	—		$	3,900	$	3,900

Fair Values and Related Carrying Values of Our Debt Instruments

Fair values and related carrying values of our long-term debt instruments are shown below.

	September 30, 2013				December 31, 2012
	Fair Value		Carrying Value		Fair Value		Carrying Value
	(In millions)
4.875% Senior Notes	$	268.1	$	249.9	$	275.5	$	249.8
5.15% Senior Notes		260.0		249.9		269.0		249.9
5.70% Senior Notes		567.9		496.9		641.4		496.9
5.875% Senior Notes		587.1		499.5		617.1		499.5