Restructuring Charges (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Jun. 30, 2011
Mar. 31, 2011
Jun. 30, 2011
Restructuring Reserve [Roll Forward]          
Restructuring Reserve $ 374 $ 1,011 $ 169 $ 369 $ 369
Restructuring charges       238 0 238
Utilized (349) (637) (45) (200)  
Restructuring Reserve $ 25 $ 374 $ 362 $ 169 $ 362