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Condensed Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Statement Of Income And Comprehensive Income [Abstract]        
Net Income $ 10,205 $ 9,848 $ 18,076 $ 19,063
Other Comprehensive Loss:        
Foreign Currency Translation Adjustment, net of Tax Effect of ($2) and $4, for the three and six months ended June 30, 2014, respectively (9)   19  
Comprehensive Income $ 10,196 $ 9,848 $ 18,095 $ 19,063