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FAIR VALUE MEASUREMENT (Tables)
 3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
Our assets measured at fair value on a recurring basis consisted of the following:
 
March 31, 2019
(in thousands)
Total fair value
Quoted prices in active markets for identical assets (level 1)
Significant other observable inputs (level 2)
Significant unobservable inputs (level 3)
Cash and cash equivalents
$
26,328

$
26,328

$
—

$
—

Restricted cash and cash equivalents
55,125

55,125

—

—

Cash, cash equivalents and restricted cash (1)
$
81,453

$
81,453

$
—

$
—

 
 
 
 
 
Municipal debt securities
$
75,794

$
—

$
75,794

$
—

Corporate debt securities
69,777

—

69,777

—

Agency mortgage-backed securities
2,235

—

2,235

—

U.S. government and agency securities
1,012

—

1,012

—

Restricted investments classified as held-to-maturity
$
148,818

$
—

$
148,818

$
—

 
 
 
 
 
Deferred compensation mutual funds classified as available-for-sale
$
26,969

$
26,969

$
—

$
—

 
December 30, 2018
(in thousands)
Total fair value
Quoted prices in active markets for identical assets (level 1)
Significant other observable inputs (level 2)
Significant unobservable inputs (level 3)
Cash and cash equivalents
$
46,988

$
46,988

$
—

$
—

Restricted cash and cash equivalents
55,462

55,462

—

—

Cash, cash equivalents and restricted cash (1)
$
102,450

$
102,450

$
—

$
—

 
 
 
 
 
Municipal debt securities
$
76,690

$
—

$
76,690

$
—

Corporate debt securities
75,432

—

75,432

—

Agency mortgage-backed securities
2,531

—

2,531

—

U.S. government and agency securities
988

—

988

—

Restricted investments classified as held-to-maturity
$
155,641

$
—

$
155,641

$
—

 
 
 
 
 
Deferred compensation mutual funds classified as available-for-sale
$
23,363

$
23,363

$
—

$
—

(1)
Cash, cash equivalents and restricted cash consist of money market funds, deposits and investments with original maturities of three months or less.