STOCK-BASED COMPENSATION

Stock Options

There were no grants made during 2018 and 2017. The assumptions used in our Black-Scholes valuation related to grants made during 2016 were as follows:



	2016
Risk-free interest rate	1.4	%
Expected life (years) ⁽⁴⁾	4.5
Expected volatility ⁽⁵⁾	31.7	%
Expected dividend yield	2.1	%

⁽⁴⁾ Expected life is derived from historical experience.

⁽⁵⁾ Expected volatility is based on the implied historical volatility of our stock.

Changes in our stock options for 2018 were as follows:



	Options		Weighted Average Exercise Price		Weighted Average Remaining Life (years)	Aggregate Intrinsic value (in thousands)
Options outstanding, June 30, 2017	1,726,791		$	34.08
Granted	—		—
Exercised	(625,503	)	35.54
Lapsed and forfeited	(111,296	)	34.68
Options outstanding, June 30, 2018	989,992		$	33.08	5.1	$	5,170
Options vested and expected to vest, June 30, 2018	989,992		$	33.08	5.1	$	5,170
Options exercisable, June 30, 2018	812,159		$	33.97	4.6	$	3,851

During 2018, 2017 and 2016, compensation expense related to stock options was $0.7 million, $1.5 million and $3.3 million, respectively. As of June 30, 2018, the total unrecognized compensation cost related to options outstanding was $0.1 million and is expected to be recognized over a weighted average period of 0.3 years.

Weighted average fair value of options granted during 2016 was $6.45 per option. Fair value of options vested during 2018, 2017 and 2016 was $1.9 million, $3.3 million and $2.3 million, respectively.

Tax benefits relating to excess stock-based compensation deductions are presented in the consolidated statements of cash flow as operating cash inflows for 2018 and as financing cash inflows for 2017 and 2016. Tax benefits resulting from stock-based compensation deductions were greater than the amounts reported for financial reporting purposes by an immaterial amount in 2018. No tax benefits were realized resulting from stock-based compensation deductions for 2017 due to the valuation allowance on U.S. deferred tax assets, and tax benefits resulting from stock-based compensation deductions were less than the amounts reported for financial reporting purposes by $1.9 million in 2016.

The amount of cash received from the exercise of capital stock options during 2018, 2017 and 2016 was $22.2 million, $21.3 million and $1.0 million, respectively. The related tax benefit in 2018 was $1.4 million. No related tax benefit was realized in 2017 due to the valuation allowance on U.S. deferred tax assets, and the related tax benefit was immaterial in 2016. The total intrinsic value of options exercised in 2018 and 2017 was $6.6 million and $3.1 million, respectively, and was immaterial in 2016.

Under the provisions of the A/R 2010 Plan and the 2016 Plan, participants may deliver stock, owned by the holder for at least six months, in payment of the option price and receive credit for the fair market value of the shares on the date of delivery. The fair market value of shares delivered during 2018, 2017 and 2016 were immaterial.

Restricted Stock Units – Time Vesting and Performance Vesting

Performance vesting restricted stock units are earned pro rata each year if certain performance goals are met over a three-year period, and are also subject to a service condition that requires the individual to be employed by the Company at the payment date after the three-year performance period, with the exception of retirement eligible grantees, who upon retirement are entitled to receive payment for any units that have been earned, including a prorated portion in the partially completed fiscal year in which the retirement occurs. Time vesting stock units are valued at the market value of the stock on the grant date. Performance vesting stock units with a market condition are valued using a Monte Carlo model.

Changes in our time vesting and performance vesting restricted stock units for 2018 were as follows:



	Performance Vesting Stock Units		Performance Vesting Weighted Average Fair Value		Time Vesting Stock Units		Time Vesting Weighted Average Fair Value
Unvested, June 30, 2017	280,250		$	27.62	1,153,444		$	27.66
Granted	158,397		38.81		434,391		37.87
Vested	(10,031	)	42.83		(421,625	)	30.29
Performance metric adjustments, net	16,766		25.88		—		—
Forfeited	(36,085	)	30.91		(82,535	)	30.81
Unvested, June 30, 2018	409,297		$	31.22	1,083,675		$	30.47

During 2018, 2017 and 2016, compensation expense related to time vesting and performance vesting restricted stock units was $19.4 million, $19.3 million and $14.6 million, respectively. As of June 30, 2018, the total unrecognized compensation cost related to unvested time vesting and performance vesting restricted stock units was $13.9 million and is expected to be recognized over a weighted average period of 1.9 years.