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Benefit Plans (Details 8) (Pension Plans, Defined Benefit [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Pension Plans, Defined Benefit [Member]
 
Estimated future benefit payments, which reflect expected future service  
2013 $ 519
2014 133
2015 350
2016 233
2017 232
Years 2018-2022 $ 1,384