Other Retirement Plans (Narrative) (Details) (Multiemployer Plans, Pension [Member], Central States Southeast And Southwest Areas Pension Fund [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013
Multiemployer Plans, Pension [Member] \| Central States Southeast And Southwest Areas Pension Fund [Member]
Multiemployer Plans [Line Items]
Multiemployer plans, withdrawal liability	$ 6.0

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.

No definition available.

Name:	us-gaap_MultiemployerPlansWithdrawalObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant