INVESTMENTS (Tables)
 3 Months Ended
Mar. 31, 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 March 31, 2015 are as follows (in thousands):
Maturity
 
Fair Value
Due:
 
 
April 1, 2015 — March 31, 2016
 
$
—

April 1, 2016 — March 31, 2020                                                                 
 
844

April 1, 2020 — March 31, 2025
 
—

After March 31, 2025
 
15,825

Available-for-sale investments                                                                                                                    
 
$
16,669
Schedule of available for sale securities reconciliation
As of March 31, 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
$
17,192

 
$
402

 
$
(925
)
 
$
16,669

Available-for-sale investments
$
17,192

 
$
402

 
$
(925
)
 
$
16,669


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):
 
March 31,
2015
 
December 31,
2014
 
Aggregate
Fair
 Value
 
Gross
Unrealized
Losses
 
Aggregate
Fair
 Value
 
Gross
Unrealized
Losses
Auction rate securities
$
15,825

 
$
(925
)
 
$
16,329

 
$
(1,071
)
Investments in an unrealized loss position
$
15,825

 
$
(925
)
 
$
16,329

 
$
(1,071
)