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Summary of Significant Accounting Policies (Supplemental Disclosures of Cash Flow Information) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Supplemental Cash Flow Information [Abstract] |  |  |
Interest, net of interest income | $ 149 | $ 164 | $ 141
Income taxes, net of refunds | 18,889 | 14,783 | 12,104
Non-cash capital expenditures | $ 13,527 | $ 2,807 |

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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