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Employee Benefit Plans (Details 3) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss) |  |
Prior service costs | $ (600) | $ (679)
Net accumulated actuarial net loss | (1,849) | (2,777)
Accumulated other comprehensive loss | (2,449) | (3,456)
Net periodic benefit cost in excess of cumulative employer contributions | (1,185) | (727)
Net amount recognized at December 31, balance sheet | (3,634) | (4,183)
Net gain (loss) arising during period | 881 | (3,001)
Prior service cost amortization | 79 | 79
Amortization of net actuarial loss | 46 | 0
Total recognized in other comprehensive income (loss) | 1,006 | (2,922)
Total recognized in net periodic pension cost and other comprehensive income (loss) | $ 218 | $ 3,829

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