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RESTRICTED INVESTMENTS
 3 Months Ended
Mar. 31, 2016
Disclosure Restricted Investments and Bond Collateral [Abstract]  
RESTRICTED INVESTMENTS
5. RESTRICTED INVESTMENTS
The Company invests certain bond collateral, reclamation deposits, and other restricted investments in a limited selection of fixed-income investment options and receives the investment returns on these investments. These investments are not available to meet the Company’s general cash needs.
These accounts include available-for-sale securities. Available-for-sale securities are reported at fair value with unrealized gains and losses excluded from earnings and reported in Accumulated other comprehensive loss.
The Company’s carrying value and estimated fair value of its restricted investments and bond collateral at March 31, 2016 were as follows:
 
Restricted Investments and Bond Collateral
 
Reclamation Deposits
 
Total Restricted Investments
 
(In thousands)
Cash and cash equivalents
$
85,948

 
$
29,554

 
$
115,502

Time deposits
2,455

 
—

 
2,455

Available-for-sale
54,942

 
48,253

 
103,195

 
$
143,345

 
$
77,807

 
$
221,152

The Company’s carrying value and estimated fair value of its restricted investments and bond collateral at December 31, 2015 were as follows:
 
Restricted Investments and Bond Collateral
 
Reclamation Deposits
 
Total Restricted Investments
 
(In thousands)
Cash and cash equivalents
$
102,539

 
$
45,819

 
$
148,358

Time deposits
2,455

 
—

 
2,455

Available-for-sale
35,813

 
31,545

 
67,358

 
$
140,807

 
$
77,364

 
$
218,171


Available-for-Sale Restricted Investments
The cost basis, gross unrealized holding gains and losses, and fair value of available-for-sale securities at March 31, 2016 were as follows (in thousands):
 
Restricted Investments and Bond Collateral
 
Reclamation Deposits
 
Total Restricted Investments
 
(In thousands)
Cost basis
$
55,868

 
$
48,945

 
$
104,813

Gross unrealized holding gains
245

 
382

 
627

Gross unrealized holding losses
(1,171
)
 
(1,074
)
 
(2,245
)
Fair value
$
54,942

 
$
48,253

 
$
103,195

The cost basis, gross unrealized holding gains and losses, and fair value of available-for-sale securities at December 31, 2015 were as follows:

 
Restricted Investments and Bond Collateral
 
Reclamation Deposits
 
Total Restricted Investments
 
(In thousands)
Cost basis
$
36,715

 
$
31,977

 
$
68,692

Gross unrealized holding gains
167

 
521

 
688

Gross unrealized holding losses
(1,069
)
 
(953
)
 
(2,022
)
Fair value
$
35,813

 
$
31,545

 
$
67,358