MARKETABLE SECURITIES

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

NOTE 4:- MARKETABLE SECURITIES

Marketable securities with contractual maturities of up to one year are as follows:


	December 31,
	2016									2015
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value		Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Government and corporate debentures - fixed interest rate	$	915,302	$	311	$	(446	)	$	915,167	$	994,600	$	3,088	$	(752	)	$	996,936
Government-sponsored enterprises debentures		149,972		99		(61	)		150,010		46,230		25		(17	)		46,238
Government and corporate debentures - floating interest rate		13,247		16		—			13,263		41,690		24		(7	)		41,707

	$	1,078,521	$	426	$	(507	)	$	1,078,440	$	1,082,520	$	3,137	$	(776	)	$	1,084,881

Marketable securities with contractual maturities of over one year through five years are as follows:


	December 31,
	2016									2015
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value		Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Government and corporate debentures - fixed interest rate	$	1,770,641	$	1,903	$	(11,024	)	$	1,761,520	$	1,947,588	$	1,439	$	(8,654	)	$	1,940,373
Government-sponsored enterprises debentures		520,669		282		(4,052	)		516,899		366,700		109		(1,243	)		365,566
Government and corporate debentures - floating interest rate		17,610		70		(2	)		17,678		25,303		11		(66	)		25,248

	$	2,308,920	$	2,255	$	(15,078	)	$	2,296,097	$	2,339,591	$	1,559	$	(9,963	)	$	2,331,187

Investments with continuous unrealized losses for less than 12 months and 12 months or greater and their related fair values were as follows:


	December 31, 2016
	Investments with continuous unrealized losses for less than 12 months					Investments with continuous unrealized losses for 12 months or greater					Total Investments with continuous unrealized losses
	Fair value		Unrealized losses			Fair value		Unrealized losses			Fair value		Unrealized losses
Government and corporate debentures - fixed interest rate	$	1,717,212	$	(11,440	)	$	40,465	$	(30	)	$	1,757,677	$	(11,470	)
Government-sponsored enterprises debentures		464,080		(4,112	)		4,999		(1	)		469,079		(4,113	)
Government and corporate debentures - floating interest rate		3,000		(2	)		—		—			3,000		(2	)

	$	2,184,292	$	(15,554	)	$	45,464	$	(31	)	$	2,229,756	$	(15,585	)


	December 31, 2015
	Investments with continuous unrealized losses for less than 12 months					Investments with continuous unrealized losses for 12 months or greater					Total Investments with continuous unrealized losses
	Fair value		Unrealized losses			Fair value		Unrealized losses			Fair value		Unrealized losses
Government and corporate debentures—fixed interest rate	$	2,138,546	$	(9,027	)	$	68,084	$	(379	)	$	2,206,630	$	(9,406	)
Government-sponsored enterprises debentures		308,026		(1,252	)		5,992		(8	)		314,018		(1,260	)
Government and corporate debentures—floating interest rate		26,688		(73	)		—		—			26,688		(73	)

	$	2,473,260	$	(10,352	)	$	74,076	$	(387	)	$	2,547,336	$	(10,739	)

As of December 31, 2016 and 2015, interest receivable amounted to $ 17,057 and $ 17,754 respectively, and is included within other current assets in the balance sheets.