Share-Based Payment Awards (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following table summarizes the Company's stock option activity for the three months ended March 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	(7.3)	$	11.38
Outstanding, March 31, 2020	344.9	$	14.00	1.3 years	$	—
Vested or expected to vest	344.9	$	14.00	1.3 years	$	—
Exercisable, March 31, 2020	344.9	$	14.00	1.3 years	$	—

Summary of Non-vested Restricted Stock Unit Activity

The following table summarizes non-vested restricted stock unit activity for the three months ended March 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	$	23.88
Granted	225.7	$	24.59
Vested	(88.2)	$	25.92
Canceled	(43.3)	$	26.60
Outstanding, March 31, 2020	548.9	$	23.63

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:

	Three Months Ended March 31,
	2020 Grants		2019 Grants
Volatility of A&B common stock	22.6	%	23.6	%
Average volatility of peer companies	23.2	%	24.3	%
Risk-free interest rate	1.3	%	2.6	%

Summary of Compensation Cost related to Share-based Payments

The Company recognizes compensation cost net of actual forfeitures of time-based or market-based awards. A summary of compensation cost related to share-based payments is as follows (in millions):

	Three Months Ended March 31,
	2020		2019
Share-based expense:
Time-based and market-based restricted stock units	$	1.5	$	1.4