Fair Value Of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value, Assets And Liabilities Measured On Recurring Basis

The following table summarizes the Company’s financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 and December 31, 2014:



			Fair Value Measurement Using
	Total Fair Value		Level 1		Level 2		Level 3
	(In thousands)
As of December 31, 2015:
Assets:
Investments in money market funds	$	137,593	$	137,593	$	—	$	—
Debt securities issued by the U.S. Treasury	1,685,882		1,685,882		—		—
Equity securities of public companies	890		890		—		—
Foreign currency forward contracts (1)	230		—		230		—
Total	$	1,824,595	$	1,824,365	$	230	$	—
Liabilities:
Contingent interest derivative on Subordinated Convertible Debentures	$	30,126	$	—	$	—	$	30,126
Foreign currency forward contracts (2)	164		—		164		—
Total	$	30,290	$	—	$	164	$	30,126
As of December 31, 2014:
Assets:
Investments in money market funds	$	85,453	$	85,453	$	—	$	—
Debt securities issued by the U.S. Treasury	1,233,076		1,233,076		—		—
Foreign currency forward contracts (1)	330		—		330		—
Total	$	1,318,859	$	1,318,529	$	330	$	—
Liabilities:
Contingent interest derivative on Subordinated Convertible Debentures	$	26,755	$	—	$	—	$	26,755
Foreign currency forward contracts (2)	169		—		169		—
Total	$	26,924	$	—	$	169	$	26,755


(1)	Included in Other current assets


(2)	Included in Accounts payable and accrued liabilities

Changes In Fair Value Measurement Of Level 3 Items

The following table summarizes the change in the fair value of the Company’s contingent interest derivative on Subordinated Convertible Debentures during the year ended December 31, 2015 and 2014:



	Year Ended December 31,
	2015			2014
	(In thousands)
Beginning balance	$	26,755		$	29,004
Unrealized loss (gain) on contingent interest derivative on Subordinated Convertible Debentures	14,130			(2,249		)
Payment of contingent interest	(10,759		)	—
Ending balance	$	30,126		$	26,755