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Stockholders' Equity (Changes in Nonvested Stock Options) (Details) - $ / shares shares in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2016
Stock-Based Compensation |  |
Number of Options, beginning balance | 2,094 | 1,724
Weighted-Average Exercise Price Per Share, beginning balance | $ 41.54 | $ 40.54
Options granted, Number of options | 0 | 1,055
Options granted, Weighted-Average Exercise Price Per Share |  | $ 40.26
Options vested, Number of options | (6) | (680)
Options vested, Weighted-Average Exercise Price Per Share | $ 41.74 | $ 36.97
Options forfeited, Number of options | (2) | (13)
Options forfeited, Weighted-Average Exercise Price Per Share | $ 40.26 | $ 43.00
Number of Options, ending balance | 2,086 | 2,086
Weighted-Average Exercise Price Per Share, ending balance | $ 41.54 | $ 41.54

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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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