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Other Retirement Plans (Narrative) (Details) (Details) (Multiemployer Plans, Pension [Member], Central States Southeast And Southwest Areas Pension Fund [Member], USD $) In Millions, unless otherwise specified | Mar. 31, 2013
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Multiemployer Plans, Pension [Member] | Central States Southeast And Southwest Areas Pension Fund [Member] |
Multiemployer Plans [Line Items] |
Multiemployer plans, withdrawal liability | $ 6.4

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- Details
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Period Type: | duration

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- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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Period Type: | instant