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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Stock-Based Compensation [Abstract]  
Schedule of compensation cost for share-based payment arrangements, allocation of share-based compensation costs by plan table Net stock-based compensation expense recognized in the Company's Consolidated Statements of Comprehensive Income was as follows:
Years Ended December 31,
202120202019
Stock-based compensation expense related to:(in millions)
Stock options$— $— $0.1 
RSUs3.4 3.0 2.7 
PSUs5.7 6.4 7.2 
Total9.1 9.4 10.0 
Less: related tax benefit1.8 2.0 2.1 
Net stock-based compensation expense$7.3 $7.4 $7.9 
Schedule of share-based compensation arrangement by share-based payment award, options, vested and expected to vest, outstanding table
Changes in outstanding stock options for the year ended December 31, 2021 were as follows:
Number of Stock OptionsWeighted-Average PriceWeighted Average Remaining Contractual Life
Stock options outstanding at January 1, 2019190,256 $23.71 2.7 years
Exercised(31,630)26.98 
Forfeited(4,610)25.37 
Stock options outstanding at December 31, 2019154,016 23.65 1.7 years
Exercised(40,800)22.08 
Stock options outstanding at December 31, 2020113,216 24.21 1.2 years
Exercised(48,051)21.84 
Stock options outstanding at December 31, 202165,165 25.96 0.7 years
Exercisable at December 31, 202165,165 25.96 0.7 years
Schedule of fair value of options vested and instrinsic value of outstanding and exercisable options table he fair value of stock options vested and the intrinsic value of outstanding and exercisable stock options as of December 31, were as follows:
202120202019
(in millions)
Fair value of stock options vested$— $0.1 $0.2 
Intrinsic value of outstanding stock options1.0 0.9 2.8 
Intrinsic value of exercisable stock options1.0 0.9 2.7 
Schedule of share-based compensation, restricted stock and restricted stock units activity
Changes in outstanding RSUs for the year ended December 31, 2021 were as follows:
Number of RSUsWeighted Average Grant Date Fair Value
RSUs outstanding at January 1, 2019250,300 $32.45 
Granted90,576 40.60 
Forfeited(22,232)36.39 
Vested(76,739)33.99 
RSUs outstanding at December 31, 2019241,905 32.45 
Granted100,491 36.01 
Forfeited(7,710)38.94 
Vested(90,342)34.76 
RSUs outstanding at December 31, 2020244,344 35.08 
Granted86,020 38.29 
Forfeited(35,730)38.78 
Vested(96,508)37.71 
RSUs outstanding at December 31, 2021198,126 34.53 
Vested but unsettled RSUs at December 31, 202168,023 26.83 
Schedule of fair value of RSUs vested and instrinsic value of outstanding and vested RSUs table The grant date fair value of RSUs vested and the intrinsic value of vested RSUs for the years ended December 31, were as follows:
202120202019
(in millions)
Grant date fair value of RSUs vested$3.6 $3.1 $2.6 
Intrinsic value of RSUs vested3.8 3.0 3.2 
PSUs awarded to certain officers table
The Company has awarded PSUs to certain employees of the Company as follows:
Date of GrantTarget Number AwardedFair Value on Date of GrantAggregate Fair Value on Date of Grant
(in millions)
March 2019(1)
95,940 40.54 3.9 
August 2019(1)
9,587 41.72 0.4 
March 2020(1)
105,180 37.81 4.0 
March 2021(1)
77,320 37.54 2.9 
April 2021(1)
980 43.29 — 
August 2021(1)
779 41.72 — 
(1)The PSUs awarded in March 2019, 2020, and 2021, August 2019, April 2021 and August 2021 were awarded and have a performance period of two years followed by an additional one year vesting period. The PSU awards are subject to certain performance goals with payouts that range from 0% to 200% of the target awards. The values shown in the table represent the aggregate number of PSUs awarded at the target level.