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Retirement Plans and Other Postretirement Benefits - Expected Amortization Expense (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012
Retirement Plans [Member]
Expected amortization expense for 2013
Amortization (accretion) of net loss	$ 1,247
(Accretion) amortization of prior service cost	(241)
Other Post Retirement Benefits [Member]
Expected amortization expense for 2013
Amortization (accretion) of net loss	(24)
(Accretion) amortization of prior service cost	$ 20

The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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- Definition

The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References+ Details