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Income Taxes | 9 Months Ended
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Jun. 30, 2017
Income Tax Disclosure [Abstract] |
Income Tax Disclosure [Text Block] | Note 4. Income Taxes At June 30, 2017 and September 30, 2016, the gross liabilities for unrecognized income tax benefits were $3.0 million and $2.8 million, respectively. The reconciliation between the U.S. federal statutory income tax rate and the effective tax rate is presented below.
| Three months ended |  | Nine months ended
| June 30, |  | June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Adjustments to reconcile to the effective tax rate: |  |  |  |  |  |  |
U.S. federal statutory income tax rate | 35.0 | % |  | 35.0 | % |  | 35.0 | % |  | 35.0 | %
State tax apportionment change | — |  |  | — |  |  | 1.7 |  |  | — |
State income taxes, net of federal benefit | 3.9 |  |  | 4.5 |  |  | 3.9 |  |  | 4.4 |
Excess tax benefit for stock-based compensation | (0.2 | ) |  | 0.7 |  |  | (4.6 | ) |  | (1.4 | )
Tax credits | (1.0 | ) |  | (2.2 | ) |  | (1.7 | ) |  | (2.8 | )
U.S. manufacturing deduction | (4.7 | ) |  | (4.2 | ) |  | (4.5 | ) |  | (3.7 | )
Other | 2.7 |  |  | (0.1 | ) |  | 2.3 |  |  | 0.3 |
Effective tax rate | 35.7 | % |  | 33.7 | % |  | 32.1 | % |  | 31.8 | %
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | The reconciliation between the U.S. federal statutory income tax rate and the effective tax rate is presented below.
| Three months ended |  | Nine months ended
| June 30, |  | June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Adjustments to reconcile to the effective tax rate: |  |  |  |  |  |  |
U.S. federal statutory income tax rate | 35.0 | % |  | 35.0 | % |  | 35.0 | % |  | 35.0 | %
State tax apportionment change | — |  |  | — |  |  | 1.7 |  |  | — |
State income taxes, net of federal benefit | 3.9 |  |  | 4.5 |  |  | 3.9 |  |  | 4.4 |
Excess tax benefit for stock-based compensation | (0.2 | ) |  | 0.7 |  |  | (4.6 | ) |  | (1.4 | )
Tax credits | (1.0 | ) |  | (2.2 | ) |  | (1.7 | ) |  | (2.8 | )
U.S. manufacturing deduction | (4.7 | ) |  | (4.2 | ) |  | (4.5 | ) |  | (3.7 | )
Other | 2.7 |  |  | (0.1 | ) |  | 2.3 |  |  | 0.3 |
Effective tax rate | 35.7 | % |  | 33.7 | % |  | 32.1 | % |  | 31.8 | %

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 + Details
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