Long-term debt (Tables)
 12 Months Ended
Dec. 31, 2013
Long-term debt [Abstract]  
Components of long-term indebtedness
The components of long-term indebtedness are as follows:

 
 
December 31,
 
(in thousands)
 
2013
  
2012
 
Construction loan dated July 2011; one month LIBOR plus 3%, repaid in December 2013
 
$
-
  
$
29,375
 
Equipment loan dated August 2011; one month LIBOR plus 3%, repaid in December 2013
  
-
   
11,068
 
Term loan dated December 2009; three month LIBOR plus 3.25%, repaid in December 2013
  
-
   
18,200
 
Term loan dated November 2009; three month LIBOR plus 3.25%, repaid in December 2013
  
-
   
4,131
 
Revolving credit loan dated December 2013; one month LIBOR plus 2.75%; due in December 2018
  
62,000
   
-
 
Total long-term indebtedness
  
62,000
   
62,774
 
Less current portion of long-term indebtedness
  
-
   
(4,470
)
Noncurrent portion of long-term indebtedness
  
62,000
   
58,304
 
Schedule of Maturities of Long-term Debt
Scheduled principal repayments and maturities on long-term debt as of December 31, 2013 are as follows:

(in thousands)
 
 
2014
  
-
 
2015
  
-
 
2016
  
-
 
2017
  
-
 
2018 and thereafter
  
62,000
 
 
 
$
62,000