Rendering
Component: (Network and Table) |
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Network | 2319301 - Disclosure - Share-Based Compensation (Tables) (http://www.amg.com/role/ShareBasedCompensationTables) |
Table | (Implied) |
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis] | 0001004434 (http://www.sec.gov/CIK) |
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | Period [Axis] |
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2016-01-01 - 2016-12-31 |
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Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
Summary of Recent Share-Based Compensation Expense | The following is a summary of share-based compensation expense: | | | | | | | | | | Period | | Share-Based Compensation Expense | | Tax Benefit | 2014 | | $ | 29.3 |
| | $ | 11.3 |
| 2015 | | 34.2 |
| | 13.2 |
| 2016 | | 39.2 |
| | 15.1 |
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Schedule of Transactions of the Company's Stock Options | The following table summarizes the transactions of the Company’s stock options: | | | | | | | | | | | Stock Options | | Weighted Average Exercise Price | | Weighted Average Remaining Contractual Life (years) | Unexercised options outstanding—January 1, 2016 | 1.4 |
| | $ | 96.18 |
| | | Options granted | 0.4 |
| | 122.82 |
| | | Options exercised | (0.4 | ) | | 81.08 |
| | | Options forfeited | (0.0 | ) | | 131.91 |
| | | Unexercised options outstanding—December 31, 2016 | 1.4 |
| | 108.53 |
| | 2.8 | Exercisable at December 31, 2016 | 0.9 |
| | 101.38 |
| | 1.3 |
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Schedule of Assumptions Used to Determine Fair Value of Options Granted | The fair value of options granted was estimated using the Black-Scholes option pricing model. The weighted average fair value of options granted during the years ended December 31, 2014, 2015 and 2016 was $60.20, $54.92, and $39.02 per option, respectively, based on the weighted-average grant date assumptions stated below. | | | | | | | | | | | For the Years Ended December 31, | | 2014 | | 2015 | | 2016 | Dividend yield | 0.0 | % | | 0.0 | % | | 0.0 | % | Expected volatility(1) | 29.7 | % | | 26.7 | % | | 30.7 | % | Risk-free interest rate(2) | 1.8 | % | | 1.5 | % | | 1.6 | % | Expected life of options (in years)(3) | 5.0 |
| | 5.0 |
| | 5.7 |
| Forfeiture rate(3) | 0.0 | % | | 0.0 | % | | 0.0 | % |
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| | (1) | Expected volatility is based on historical and implied volatility. |
| | (2) | Risk-free interest rate is based on the U.S. Treasury yield curve in effect at the date of grant. |
| | (3) | Expected life of options (in years) is based on the Company’s historical and expected exercise behavior. |
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Summary of Transactions of the Company's Restricted Stock | The following table summarizes the transactions of the Company’s restricted stock: | | | | | | | | | Restricted Stock | | Weighted Average Grant Date Value | Unvested units—January 1, 2016 | 0.6 |
| | $ | 192.04 |
| Units granted | 0.2 |
| | 122.59 |
| Units vested | (0.2 | ) | | 181.87 |
| Units forfeited | (0.0 | ) | | 171.51 |
| Unvested units—December 31, 2016 | 0.6 |
| | 168.84 |
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