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Equity-Based Compensation (Tables) | 12 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan | The compensation cost for employee and non-employee director share-based compensation programs for all current and prior year awards granted are as follows:
|  | 2017 |  | 2016 |  | 2015
Stock appreciation rights |  | $ | 3,045 |  |  | $ | 2,482 |  |  | $ | 4,955 |
Performance-based restricted stock units |  | 978 |  |  | 755 |  |  | — |
Restricted stock awards |  | 480 |  |  | — |  |  | — |
Employee stock purchase plan |  | 74 |  |  | — |  |  | — |
Stock options |  | 5 |  |  | 34 |  |  | 119 |
Total compensation cost before income taxes |  | $ | 4,582 |  |  | $ | 3,271 |  |  | $ | 5,074 |
Income tax benefit |  | $ | 1,567 |  |  | $ | 1,184 |  |  | $ | 1,913 |
Schedule Of Range Of Assumptions Used To Value Equity-Based Awards And The Weighted-Average Fair Value Of The Awards Granted | The following table provides the range of assumptions used to value awards and the weighted-average fair value of the awards granted.
|  | 2017 |  | 2016 |  | 2015
Expected volatility |  | 27% - 29% |  |  | 24% - 29% |  |  | 24% - 38% |
Risk-free rate |  | 1.7% - 1.8% |  |  | 1.4% - 1.8% |  |  | .9% - 1.9% |
Expected dividends |  | — | % |  | — | % |  | — | %
Expected term |  | 5-6 years |  |  | 4-6 years |  |  | 3-7 years |
Weighted-average fair value of awards granted |  | $ | 21.20 |  |  | $ | 18.24 |  |  | $ | 28.71 |
Schedule of Stock Appreciation Rights Activity | SARs and options are as follows:
Stock Appreciation Rights |  | Number of Awards |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Life |  | Aggregate Intrinsic Value
Outstanding at October 1, 2016 |  | 1,467,219 |  |  | $ | 47.97 |  |  |  |  |
Granted in 2017 |  | 176,000 |  |  | 71.65 |  |  |  |  |
Exercised in 2017 |  | (463,926 | ) |  | 41.36 |  |  |  |  |
Expired in 2017 |  | (6,002 | ) |  | 74.38 |  |  |  |  |
Forfeited in 2017 |  | (4,999 | ) |  | 70.94 |  |  |  |  |  |
Outstanding at September 30, 2017 |  | 1,168,292 |  |  | $ | 53.93 |  |  | 5.6 years |  | $ | 34,381 |
Exercisable at September 30, 2017 |  | 863,358 |  |  | $ | 48.34 |  |  | 4.6 years |  | $ | 30,280 |
Schedule of Stock Options Activity |
Stock Options |  |  |  |  |  |  |  |
Outstanding at October 1, 2016 |  | 118,098 |  |  | $ | 41.02 |  |  |  |  |
Exercised in 2017 |  | (93,416 | ) |  | 40.64 |  |  |  |  |
Outstanding at September 30, 2017 |  | 24,682 |  |  | $ | 42.45 |  |  | 0.2 years |  | $ | 1,011 |
Exercisable at September 30, 2017 |  | 21,788 |  |  | $ | 42.45 |  |  | 0.2 years |  | $ | 893 |
Schedule Of Intrinsic Value Of Awards Exercised And Fair Value Of Awards Vested | The intrinsic value of awards exercised and fair value of awards vested are as follows:
|  | 2017 |  | 2016 |  | 2015
Stock Appreciation Rights |  |  |  |  |  |
Intrinsic value of SARs exercised |  | $ | 13,363 |  |  | $ | 865 |  |  | $ | 14,566 |
Total fair value of SARs vested |  | $ | 4,044 |  |  | $ | 5,876 |  |  | $ | 5,424 |
Stock Options |  |  |  |  |  |
Intrinsic value of options exercised |  | $ | 2,835 |  |  | $ | 4,100 |  |  | $ | 14,205 |
Total fair value of options vested |  | $ | 66 |  |  | $ | 947 |  |  | $ | 981 |
Schedule of Nonvested Performance-based Units Activity | PSUs are as follows:
Performance-Based Restricted Stock Units |  | Number of Awards |  | Weighted- Average Grant Date Fair Value
Nonvested at October 1, 2016 |  | 38,050 |  |  | $ | 64.95 |
Granted in 2017 |  | 40,700 |  |  | 71.65 |
Forfeited in 2017 |  | (6,000 | ) |  | 68.63 |
Nonvested at September 30, 2017 |  | 72,750 |  |  | $ | 68.39 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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