FAIR VALUE MEASUREMENTS: (Tables)

12 Months Ended

Dec. 31, 2013

FAIR VALUE MEASUREMENTS:

Schedule of the fair value hierarchy of the Company's financial assets and liabilities measured at fair value

The following table represents the fair value hierarchy of the Company’s financial assets and liabilities measured at fair value as of December 31, 2013.

	Level 1		Level 2		Total
	(in thousands)
Money market funds	$	20,000	$	—	$	20,000
Certificates of deposit	—		67,769		67,769
U.S. Government and agency securities	—		69,879		69,879
Commercial paper	—		33,606		33,606
Corporate bonds	—		92,274		92,274
Derivative contracts	—		1,396		1,396
Total financial assets	$	20,000	$	264,924	$	284,924

The following table represents the fair value hierarchy of the Company’s financial assets and liabilities measured at fair value as of December 31, 2012.

	Level 1		Level 2		Total
	(in thousands)
Certificates of deposit	$	—	$	90,431	$	90,431
U.S. Government and agency securities	—		115,129		115,129
Commercial paper	—		34,947		34,947
Corporate bonds	—		61,462		61,462
Foreign government bonds	—		7,530		7,530
Derivative contracts	—		2,942		2,942
Total financial assets	$	—	$	312,441	$	312,441