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Retirement Plans Retirement Plans (Benefit Payments) (Details) (Retirement Income Plan [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Retirement Income Plan [Member]
 
2013 $ 7,586
2014 8,384
2015 9,148
2016 9,942
2017 10,810
2018-2022 $ 67,447