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RESTRICTED CASH AND INVESTMENTS (Tables)
 9 Months Ended
Sep. 23, 2016
Restricted Cash and Investments [Abstract]  
Schedule of restricted cash and investments
The following is a summary of our restricted cash and investments (in thousands):
 
September 23,
2016
 
December 25,
2015
Cash collateral held by insurance carriers
$
27,172

 
$
23,634

Cash and cash equivalents held in Trust
21,101

 
26,046

Investments held in Trust
148,811

 
126,788

Other (1)
15,884

 
11,944

Total restricted cash and investments
$
212,968

 
$
188,412


(1)
Primarily consists of deferred compensation plan accounts, which are comprised of mutual funds classified as available-for-sale securities.
Schedule of held-to-maturity investments
The following tables present fair value disclosures for our held-to-maturity investments, which are carried at amortized cost (in thousands):
 
September 23, 2016
 
Amortized Cost
 
Gross Unrealized Gain
 
Gross Unrealized Loss
 
Fair Value
Municipal debt securities
$
72,776

 
$
2,186

 
$
(37
)
 
$
74,925

Corporate debt securities
69,552

 
1,510

 
(13
)
 
71,049

Agency mortgage-backed securities
6,483

 
107

 
(1
)
 
6,589

 
$
148,811

 
$
3,803

 
$
(51
)
 
$
152,563

 
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
Schedule of held-to-maturity investments by contractual maturity
The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows (in thousands):
 
September 23, 2016
 
Amortized Cost
 
Fair Value
Due in one year or less
$
14,051

 
$
14,092

Due after one year through five years
76,590

 
77,854

Due after five years through ten years
58,170

 
60,617

 
$
148,811

 
$
152,563