RESTRICTED CASH AND INVESTMENTS

Restricted cash and investments consist principally of collateral that has been provided or pledged to insurance carriers for workers' compensation and state workers' compensation programs. Our insurance carriers and certain state workers' compensation programs require us to collateralize a portion of our workers' compensation obligation. The collateral typically takes the form of cash and cash equivalents and highly rated investment grade securities, primarily in municipal debt securities, corporate debt securities, and asset-backed securities. The majority of our collateral obligations are held in a trust at the Bank of New York Mellon ("Trust"). Our investments have not resulted in any other-than-temporary impairments.

The following is a summary of our restricted cash and investments (in thousands):



	June 24, 2016		December 25, 2015
Cash collateral held by insurance carriers	$	26,438	$	23,634
Cash and cash equivalents held in Trust	25,205		26,046
Investments held in Trust	138,391		126,788
Other (1)	14,320		11,944
Total restricted cash and investments	$	204,354	$	188,412


(1)	Primarily consists of deferred compensation plan accounts, which are comprised of mutual funds classified as available-for-sale securities.

The following tables present fair value disclosures for our held-to-maturity investments, which are carried at amortized cost (in thousands):



	June 24, 2016
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Municipal debt securities	$	65,231	$	2,587	$	—		$	67,818
Corporate debt securities	66,007		1,461		(2		)	67,466
Agency mortgage-backed securities	7,153		117		(1		)	7,269
	$	138,391	$	4,165	$	(3	)	$	142,553



	December 25, 2015
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Municipal debt securities	$	67,948	$	1,345	$	(4	)	$	69,289
Corporate debt securities	50,462		226		(152		)	50,536
Agency mortgage-backed securities	8,378		73		(31		)	8,420
	$	126,788	$	1,644	$	(187	)	$	128,245

The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows (in thousands):



	June 24, 2016
	Amortized Cost		Fair Value
Due in one year or less	$	16,580	$	16,649
Due after one year through five years	68,592		69,916
Due after five years through ten years	53,219		55,988
	$	138,391	$	142,553

Actual maturities may differ from contractual maturities because the issuers of certain debt securities have the right to call or prepay their obligations without penalty. We have no significant concentrations of counterparties in our held-to-maturity investment portfolio.