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Retirement Benefits (Schedule of Costs of Retirement Plans) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Multiemployer Plan [Member] |  |  |  |
Company Contributions | $ 142 | $ 180 | $ 452 | $ 555
Defined Contribution Plan [Member] |  |  |  |
Company Costs | $ 7,908 | $ 5,537 | $ 23,034 | $ 16,219

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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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