INVESTMENTS

12 Months Ended

Dec. 31, 2013

Investments, Debt and Equity Securities [Abstract]

INVESTMENTS

Investments

The following tables summarize our short-term investments (dollars in thousands):

		As of December 31, 2013
	Maturity (in years)	Amortized cost	Gross unrealized gains	Gross unrealized losses		Estimated fair value
U.S. Treasury securities and debt securities of U.S. Government agencies(1)	2 years or less	3,001	—	(3	)	2,998
Corporate debt securities(1)	2 years or less	31,319	—	(22	)	31,297
Commercial paper(1)	1 year or less	8,485	12	—		8,497
Guaranteed investment certificates (2)	1 year or less	5,046	—	(3	)	5,043
		47,851	12	(28	)	47,835

		As of December 31, 2012
	Maturity (in years)	Amortized cost	Gross unrealized gains	Gross unrealized losses	Estimated fair value
Term deposits (2)	1 year or less	7,036	—	—	7,036
Commercial paper (2)	1 year or less	5,026	—	—	5,026
Guaranteed investment certificates (2)	1 year or less	6,518	—	—	6,518
		18,580	—	—	18,580

(1) Investments are designated as available-for-sale investments.

(2) Investments are designated as trading investments.