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Pension and Employee Benefit Plans (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Pension plan:    
Service cost $ 58 $ 41
Interest cost 328 367
Expected return on plan assets (377) (388)
Net amortization and deferral 333 252
Net periodic benefit cost $ 342 $ 272