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Statements of Consolidated Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Comprehensive Income Net Of Tax [Abstract]        
Net income $ 6,104 $ 9,284 $ 17,455 $ 24,013
Other comprehensive income (loss), net of tax        
Foreign currency translation adjustment 2,376 2,660 (5,764) 774
Recognized net acturial loss (net of tax provision $46 and $71 for the three months ended September 30, 2013 and 2012, and net of tax provision $140 and $213 for the nine months ended September 30, 2013 and 2012) 77 117 230 350
Other comprehensive income (loss), net of tax 2,453 2,777 (5,534) 1,124
Comprehensive income $ 8,557 $ 12,061 $ 11,921 $ 25,137