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Commitments
12 Months Ended
Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]  
Commitments
12. Commitments

Leases

The Company has entered into operating leases for facilities and equipment. These leases are non-cancellable and typically do not contain renewal options. Certain leases contain rent escalation clauses for which the Company recognizes the expense on a straight-line basis. Rent expense under the Company’s operating leases for the years ended December 31, 2013, 2012 and 2011 was approximately $3.4 million, $4.1 million and $4.8 million, respectively. Future minimum lease payments under operating leases, net of amounts to be received under sub-leases, as of December 31, 2013 are as follows:

 

(U.S. Dollars in thousands)

      

2014

   $ 4,342   

2015

     4,107   

2016

     3,713   

2017

     2,974   

2018

     2,846   

Thereafter

     3,049   
  

 

 

 

Total

   $ 21,031