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RESTRICTED CASH AND INVESTMENTS (Tables)
 12 Months Ended
Jan. 01, 2017
Restricted Cash and Investments [Abstract]  
Schedule of restricted cash and investments
The following is a summary of our restricted cash and investments:
(in thousands)
December 31,
2017
January 1,
2017
Cash collateral held by insurance carriers
$
22,926

$
34,910

Cash and cash equivalents held in Trust
16,113

32,841

Investments held in Trust
171,752

146,517

Other (1)
28,440

16,925

Total restricted cash and investments
$
239,231

$
231,193


(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:
 
December 31, 2017
(in thousands)
Amortized cost
Gross unrealized gain
Gross unrealized loss
Fair value
Municipal debt securities
$
82,770

$
974

$
(378
)
$
83,366

Corporate debt securities
83,916

309

(434
)
83,791

Agency mortgage-backed securities
4,066

22

(26
)
4,062

U.S. government and agency securities
1,000

19

—

1,019

 
$
171,752

$
1,324

$
(838
)
$
172,238

 
January 1, 2017
(in thousands)
Amortized cost
Gross unrealized gain
Gross unrealized loss
Fair value
Municipal debt securities
$
71,618

$
443

$
(865
)
$
71,196

Corporate debt securities
68,934

212

(352
)
68,794

Agency mortgage-backed securities
5,965

30

(32
)
5,963

 
$
146,517

$
685

$
(1,249
)
$
145,953
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:
 
December 31, 2017
(in thousands)
Amortized cost
Fair value
Due in one year or less
$
17,265

$
17,248

Due after one year through five years
90,906

90,825

Due after five years through ten years
63,581

64,165

 
$
171,752

$
172,238