MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities with Contractual Maturities

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


	December 31,
	2015									2014
	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	$	994,600	$	3,088	$	(752	)	$	996,936	$	882,051	$	3,433	$	(141	)	$	885,343
Government-sponsored enterprises debentures		46,230		25		(17	)		46,238		154,619		183		(5	)		154,797
Government and corporate debentures - floating interest rate		41,690		24		(7	)		41,707		3,001		8		—			3,009

	$	1,082,520	$	3,137	$	(776	)	$	1,084,881	$	1,039,671	$	3,624	$	(146	)	$	1,043,149

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


	December 31,
	2015									2014
	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	$	1,947,588	$	1,439	$	(8,654	)	$	1,940,373	$	1,916,756	$	2,905	$	(4,519	)	$	1,915,142
Government-sponsored enterprises debentures		366,700		109		(1,243	)		365,566		390,468		256		(990	)		389,734
Government and corporate debentures - floating interest rate		25,303		11		(66	)		25,248		65,512		102		(19	)		65,595

	$	2,339,591	$	1,559	$	(9,963	)	$	2,331,187	$	2,372,736	$	3,263	$	(5,528	)	$	2,370,471

Investments with Continuous Unrealized Losses

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, 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	)


	December 31, 2014
	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	$	1,199,879	$	(2,994	)	$	257,258	$	(1,666	)	$	1,457,137	$	(4,660	)
Government-sponsored enterprises debentures		177,953		(487	)		89,350		(508	)		267,303		(995	)
Government and corporate debentures - floating interest rate		17,102		(14	)		5,003		(5	)		22,105		(19	)

	$	1,394,934	$	(3,495	)	$	351,611	$	(2,179	)	$	1,746,545	$	(5,674	)

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details