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Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2014

Marketable Securities [Abstract]

Held-to-Maturity Securities

The Company's investment in marketable securities as of December 31, 2013 and 2014 are classified as “held-to-maturity” and consist of the following: 

										Gross					Gross
										unrealized					unrealized
					Amortized					holding					holding					Aggregate
					cost basis**					gains					(losses)					fair value*
					US$ thousands
At December 31, 2014
Held to maturity:
Corporate debt securities
Current						15,328					-					(69	)				15,259
Non-Current						20,536					-					(271	)				20,265
						35,864					-					(340	)				35,524
At December 31, 2013
Held to maturity:
Corporate debt securities and
government debt securities
Current						15,015					20					(76	)				14,959
Non-Current						24,617					69					(167	)				24,519
						39,632					89					(243	)				39,478

* Fair value is being determined using quoted market prices in active markets (Level 1).

** Including accrued interest in the amount of US$ 391 thousand and US$ 339 thousand as of December 31, 2013 and 2014 respectively.

Schedule of Reconciliation of Marketable Securities

	Activity in marketable securities in 2014								US$ thousands
	Balance at January 1, 2014									39,632
	Purchases of marketable securities									11,740
	Discount of marketable securities									(758	)
	Proceeds from maturity of marketable securities									(14,750	)
	Balance at December 31, 2014									35,864

Summary of Investment Securities in an Unrealized Loss Position

The following table summarizes the gross unrealized losses on investment securities for which other-than-temporary impairments have not been recognized and the fair value of those securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2014:
					Less than 12 months										12 months or more										Total
Held to maturity					Unrealized Losses					Fair value					Unrealized Losses					Fair value					Unrealized Losses					Fair value
Corporate debt securities						(170	)				18,936					(170	)				15,573					(340	)				34,509

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