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Share-Based Payment Awards (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Stock Option Activity | The following table summarizes the Company's stock option activity for the year ended December 31, 2020 (in thousands, except weighted-average exercise price and weighted-average contractual life):
|  | 2012 Plan Stock Options |  | Weighted- Average Exercise Price |  | Weighted- Average Contractual Life |  | Aggregate Intrinsic Value
Outstanding, January 1, 2020 |  | 352.2 |  | $ | 13.95 |  |  |  |
Exercised |  | (254.3) |  | $ | 13.62 |  |  |  |
Canceled |  | — |  | $ | — |  |  |  |
Outstanding, December 31, 2020 |  | 97.9 |  | $ | 14.80 |  | 1.0 year |  | $ | 221.7
Vested or expected to vest |  | 97.9 |  | $ | 14.80 |  | 1.0 year |  | $ | 221.7
Exercisable, December 31, 2020 |  | 97.9 |  | $ | 14.80 |  | 1.0 year |  | $ | 221.7
Summary of Non-vested Restricted Stock Unit Activity | The following table summarizes non-vested restricted stock unit activity for the year ended December 31, 2020 (in thousands, except weighted-average grant-date fair value amounts):
|  | 2012 Plan Restricted Stock Units |  | Weighted- Average Grant-date Fair Value
Outstanding, January 1, 2020 |  | 454.7 |  | $ | 27.33
Granted |  | 286.2 |  | $ | 22.01
Vested |  | (135.3) |  | $ | 25.14
Canceled |  | (55.1) |  | $ | 23.93
Outstanding, December 31, 2020 |  | 550.5 |  | $ | 25.44
Schedule of Fair Value Assumptions of Market-based Awards | The fair value of the Company's market-based awards is estimated using the Company's stock price on the date of grant and the probability of vesting using a Monte Carlo simulation with the following weighted-average assumptions:
|  | 2020 Grants |  | 2019 Grants |  | 2018 Grants
Volatility of A&B common stock |  | 22.6 | % |  | 23.6 | % |  | 22.7 | %
Average volatility of peer companies |  | 22.5 | % |  | 24.2 | % |  | 21.6 | %
Risk-free interest rate |  | 1.3 | % |  | 2.5 | % |  | 2.3 | %
Summary of Compensation Cost related to Share-based Payments | A summary of compensation cost related to share-based payments is as follows for the years ended December 31, 2020, 2019 and 2018 (in millions):
|  | 2020 |  | 2019 |  | 2018
Share-based expense: |  |  |  |  |  |
Time-based and market-based restricted stock units |  | $ | 5.8 |  |  | $ | 5.4 |  |  | $ | 4.7 |
Total share-based expense |  | 5.8 |  |  | 5.4 |  |  | 4.7 |
Total recognized tax benefit |  | — |  |  | — |  |  | — |
Share-based expense (net of tax) |  | $ | 5.8 |  |  | $ | 5.4 |  |  | $ | 4.7 |
Cash received upon option exercise |  | $ | 3.5 |  |  | $ | 2.6 |  |  | $ | 0.4 |
Intrinsic value of options exercised |  | $ | 0.5 |  |  | $ | 2.6 |  |  | $ | 0.4 |
Tax benefit realized upon option exercise |  | $ | — |  |  | $ | — |  |  | $ | — |
Fair value of stock vested |  | $ | 3.0 |  |  | $ | 4.5 |  |  | $ | 4.0 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. Also includes disclosures of other measures related to share-based payments, including, but not limited to, cash proceeds received from the exercise of stock options and similar instruments granted under share-based payment arrangements and the intrinsic value of stock options exercised during the period. + References No definition available. + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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