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Employee Benefit Plans (Details 3) (Pension, USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Pension
      
Components of net pension cost      
Service cost-benefits earned during the year $ 1,174 $ 1,168 $ 931
Interest costs on projected benefit obligations 646 667 604
Expected return on plan assets (797) (776) (706)
Expected administrative expenses 40 40  
Amortization of prior service cost 79 79 78
Amortization of unrecognized net loss 31 46  
Net periodic pension expense 1,173 1,224 907
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss), including amounts recognized in other comprehensive income      
Prior service costs (522) (600)  
Net accumulated actuarial net loss 1,560 (1,849)  
Accumulated other comprehensive gain (loss) 1,038 (2,449)  
Net periodic benefit cost in excess of cumulative employer contribution (2,358) (1,186)  
Net amount recognized at December 31, balance sheet (1,320) (3,635)  
Net gain arising during period 3,378 881  
Prior service cost amortization 79 79  
Amortization of net actuarial loss 31 46  
Total recognized in other comprehensive income (loss) 3,488 1,006  
Total recognized in net periodic pension cost and other comprehensive income (loss) $ (2,315) $ 218