LONG-TERM DEBT
 3 Months Ended
Mar. 31, 2015
Debt Disclosure [Abstract]  
LONG-TERM DEBT
LONG-TERM DEBT:
Long-term debt consisted of:
 
 
March 31, 
2015
 
December 31, 
2014
$402.5 million aggregate principal amount 1.625% Convertible Senior Notes due 2019
 
$
335,192

 
$
331,998

$114.4 million aggregate principal amount 3.000% Convertible Senior Notes due 2015
 
110,281

 
108,792

Capital leases
 
15,679

 
15,867

Total debt
 
461,152

 
456,657

Less: Current portion of long-term debt
 
(110,281
)
 
(108,792
)
Less: Current portion of capital leases
 
(2,840
)
 
(2,853
)
Total long-term debt
 
$
348,031

 
$
345,012


During the three months ended March 31, 2015 and 2014, the Company recorded, as a component of interest expense, long-term debt discount amortization of $4,707 and $4,403, respectively. Interest expense from the amortization of debt issuance costs was $490 and $455 for the three months ended March 31, 2015 and 2014, respectively. No interest was capitalized for the three months ended March 31, 2015 and 2014.