Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information

Supplemental disclosures of cash flow information are as follows:

 

     Year ended December 31,  
     2015      2014      2013  
     (in thousands)  

Cash paid for income taxes, net

    $ 4,792       $ 2,088       $ 1,019