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INVESTMENTS (Tables)
 6 Months Ended
Jun. 30, 2015
Investments, Debt and Equity Securities [Abstract]  
Scheduled maturities of investments classified as available-for-sale
Scheduled maturities of investments classified as available-for-sale as of June 30, 2015 are as follows (in thousands):
Maturity
 
Fair Value
Due:
 
 
July 1, 2015 — June 30, 2016
 
$
—

July 1, 2016 — June 30, 2020                                                                 
 
845

July 1, 2020 — June 30, 2025
 
—

After June 30, 2025
 
15,204

Available-for-sale investments                                                                                                                    
 
$
16,049
Schedule of available for sale securities reconciliation
As of June 30, 2015, the amortized cost basis and fair value of investments classified as available-for-sale were as follows (in thousands):
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
 Unrealized
Losses
 
Fair
Value
Auction rate securities
$
16,492

 
$
403

 
$
(846
)
 
$
16,049

Available-for-sale investments
$
16,492

 
$
403

 
$
(846
)
 
$
16,049


As of December 31, 2014, the amortized cost basis and fair value of investments classified as available-for-sale were as follows (in thousands):
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
Auction rate securities
$
17,842

 
$
380

 
$
(1,071
)
 
$
17,151

Available-for-sale investments
$
17,842

 
$
380

 
$
(1,071
)
 
$
17,151
Schedule of unrealized loss on investments for twelve months or longer
The components of the Company’s investments in an unrealized loss position for twelve months or longer were as follows (in thousands):
 
June 30,
2015
 
December 31,
2014
 
Aggregate
Fair
 Value
 
Gross
Unrealized
Losses
 
Aggregate
Fair
 Value
 
Gross
Unrealized
Losses
Auction rate securities
$
15,204

 
$
(846
)
 
$
16,329

 
$
(1,071
)
Investments in an unrealized loss position
$
15,204

 
$
(846
)
 
$
16,329

 
$
(1,071
)