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Employee Benefit Plans (Narrative) (Details) (USD $) | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2014 Deferred Compensation | Sep. 30, 2014 Retiree Medical Plan | Sep. 30, 2013 Retiree Medical Plan | Sep. 30, 2013 Retiree Medical Plan Maximum | Sep. 30, 2012 Retiree Medical Plan Maximum | Sep. 30, 2011 Retiree Medical Plan Maximum
Deferred Compensation Arrangement With Individual Postretirement Benefits [Line Items] |  |  |  |  |  |  |  |  |
Defined contribution plan recognized expenses | $ 5,300,000 | $ 4,900,000 | $ 4,200,000 |  |  |  |  |  |
Percentage of employee based salary permitted for deferral under the plan | 50.00% |  |  |  |  |  |  |  |
Percentage of employee annual bonus permitted for deferral under the plan | 100.00% |  |  |  |  |  |  |  |
Deferred compensation expense | 200,000 |  |  |  |  |  |  |  |
Deferred compensation plan assets | 3,526,000 | 2,862,000 |  |  |  |  |  |  |
Deferred compensation liabilities | 3,688,000 | 2,862,000 |  |  |  |  |  |  |
Deferred compensation requisite service period |  |  |  | on or after age 65 and the completion of at least 10 years of continuous employment. | 10 years of service who are age 55 or older but less than 65. |  |  |  |
Deferred compensation recorded liability | 500,000 |  |  |  |  |  |  |  |
Cash Surrender value of life insurance | 4,400,000 |  |  |  |  |  |  |  |
Unfunded liability |  |  |  |  | 700,000 | 700,000 |  |  |
Net periodic postretirement benefit cost |  |  |  |  |  |  | $ 100,000 | $ 100,000 | $ 100,000

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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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- Definition The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=21915240&loc=d3e1703-114919 + Details
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