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Employee Benefit Plans (Details 13) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net (gain) loss arising during period $ 8,765 $ 13,975 $ (7,798)
SERP
      
Accumulated other comprehensive gain (loss) at beginning of fiscal year (120) (1,203)  
Net (gain) loss arising during period 1,856 1,687  
Prior service cost    83  
Amortization of unrecognized actuarial loss (101)     
Amortization of prior service cost and transition obligation    19  
Tax expense related to changes during the year, net (686) (706)  
Accumulated other comprehensive gain (loss) at end of fiscal year $ 949 $ (120)