Stock-Based Compensation (Details) (USD $) | 3 Months Ended |
Dec. 31, 2014 | Dec. 31, 2013 |
plan |
Common-stock based award plan | | |
Number of prior equity plans | 1 | |
Compensation expense (in dollars) | $6,982,000 | $7,010,000 |
Excess tax benefit from stock-based compensation | 2,723,000 | 10,126,000 |
Stock options | | |
Common-stock based award plan | | |
The period from the grant date after which options expire | 10 years | |
Compensation expense (in dollars) | 3,062,000 | 3,653,000 |
Weighted-average assumptions utilized in determining the fair value of options | | |
Risk-free interest rate (as a percent) | 1.72% | 1.58% |
Expected stock volatility (as a percent) | 36.92% | 52.55% |
Dividend yield (as a percent) | 3.92% | 3.14% |
Expected term | 5 years 6 months | 5 years 6 months |
Weighted-average fair value of options granted (in dollars per share) | $16.39 | |
Options | | |
Options outstanding at the beginning of the period (in shares) | 2,629,000 | |
Granted (in shares) | 419,585 | |
Exercised (in shares) | -104,000 | |
Forfeited/Expired (in shares) | -14,000 | |
Option outstanding at the end of the period (in shares) | 2,931,000 | |
Vested and expected to vest at the end of the period (in shares) | 2,924,000 | |
Exercisable at the end of the period (in shares) | 2,168,000 | |
Weighted-Average Exercise Price | | |
Outstanding at the beginning of the period (in dollars per share) | $43.46 | |
Granted (in dollars per share) | $68.83 | |
Exercised (in dollars per share) | $16.09 | |
Forfeited/Expired (in dollars per share) | $67.10 | |
Outstanding at the end of the period (in dollars per share) | $47.96 | |
Vested and expected to vest at the end of the period (in dollars per share) | $47.91 | |
Exercisable at the end of the period (in dollars per share) | $41.35 | |
Weighted- Average Remaining Contractual Term | | |
Outstanding at the end of the period | 5 years 10 months 24 days | |
Vested and expected to vest at the end of the period | 5 years 10 months 24 days | |
Exercisable at the end of the period | 4 years 9 months 18 days | |
Aggregate Intrinsic Value | | |
Outstanding at the end of the period (in dollars) | 60,700,000 | |
Vested and expected to vest at the end of the period (in dollars) | 60,700,000 | |
Exercisable at the end of the period (in dollars) | 57,800,000 | |
Total intrinsic value of options exercised (in dollars) | 6,900,000 | |
Unrecognized compensation cost (in dollars) | 11,100,000 | |
Weighted-average period over which unrecognized compensation cost is expected to be recognized | 3 years | |
Restricted stock | | |
Common-stock based award plan | | |
Compensation expense (in dollars) | 3,920,000 | 3,357,000 |
Aggregate Intrinsic Value | | |
Unrecognized compensation cost (in dollars) | $34,200,000 | |
Weighted-average period over which unrecognized compensation cost is expected to be recognized | 2 years 10 months 24 days | |
Restricted stock awards activity, shares | | |
Unvested at the beginning of the period (in shares) | 634,000 | |
Granted (in shares) | 275,250 | |
Vested (in shares) | -214,000 | |
Forfeited/Expired (in shares) | -6,000 | |
Unvested at the end of the period (in shares) | 689,000 | |
Restricted stock awards activity, weighted average grant date fair value | | |
Unvested at the beginning of the period (in dollars per share) | $64.03 | |
Granted (in dollars per share) | $68.83 | |
Vested (in dollars per share) | $54.18 | |
Forfeited/Expired (in dollars per share) | $65.95 | |
Unvested at the end of the period (in dollars per share) | $66.93 | |
Restricted stock | Minimum | | |
Common-stock based award plan | | |
Vesting period | 3 years | |
Restricted stock | Maximum | | |
Common-stock based award plan | | |
Vesting period | 6 years | |