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Employee Benefit Plans (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Benefit Plans [Abstract]
Company plan contirbutions	$ 0	$ 0	$ 0
Unrecognized prior service cost reduction	1,100
Assumed health care cost trend rate	7.00%
Ultimate health care cost trend rate	3.50%
Year that plan rate reaches ultimate health care cost trend rate	2018
Expected future contributions	$ 112

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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