Stock-Based Compensation and Stock Awards - Restricted Stock Awards - Additional Information (Details) - Restricted stock awards - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Restricted stock awards compensation expense	$ 7.5	$ 8.6	$ 8.8
Income tax benefit recognized	1.1	$ 2.0	$ 1.5
Unrecognized compensation expense related to share based compensation	$ 7.2
Period of recognition for unrecognized compensation expense related to nonvested stock options (in years)	2 years 10 months 24 days
Antidilutive securities (in shares)	352,408	46,000	240,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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-Publisher FASB
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