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Share-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended | 36 Months Ended |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | May 19, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Common stock available for awards, shares | 9,081,947 |  |  |  |  | 9,081,947 |
Common stock reserved for future awards, shares |  |  |  |  |  |  | 10,000,000
Stock-based employee compensation expense | $ 16.7 | $ 13.5 | $ 16.3 |  |  |  |
Related tax benefits | 4.0 | 3.3 | 4.0 |  |  |  |
Excess Tax Benefit from Share-based Compensation, Operating Activities | 0.4 |  | 0.8 |  |  |  |
Unrecognized compensation cost related to nonvested awards | $ 25.1 |  |  |  |  | $ 25.1 |
Weighted-average remaining requisite service period, years | 1 year 9 months 18 days |  |  |  |  |  |
RTSR Modifier | 25.00% |  |  |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 3.00% |  |  |  |  |  |
401(k) match, profit sharing and non-elective expense | $ 39.1 | 37.8 | $ 37.5 |  |  |  |
Excess Tax Expense - Share Based Compensation |  | $ 0.4 |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | 285,755 |  |  |  |  |  |
Shares nonvested | 572,154 | 478,227 |  |  |  | 572,154 |
Shares vesting period, (years) |  |  |  |  |  | 3 years |
Granted, Weighted Average Grant Date Fair Value | $ 19.83 |  |  |  |  |  |
Restricted Stock Units (RSUs) | Share-based Payment Arrangement, Nonemployee |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares nonvested | 66,273 |  |  |  |  | 66,273 |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number | 252,673 |  |  |  |  | 252,673 |
Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | 973,885 | 528,729 | 552,389 |  |  |  |
Shares nonvested | 1,798,151 | 1,384,336 |  |  |  | 1,798,151 |
Shares vesting period, (years) |  |  |  |  |  | 3 years |
Granted, Weighted Average Grant Date Fair Value | $ 21.76 |  |  |  |  |  |
Performance Shares | NOEPS |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Fair value of shares granted | $ 6.5 | $ 11.7 | $ 11.7 |  |  |  |
Performance Shares | CVI |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Fair value of shares granted |  | $ 2.6 | $ 2.5 |  |  |  |
2019 Award | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted |  |  | 166,031 |  |  |  |
Shares nonvested | 99,055 |  |  |  |  | 99,055 |
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value |  |  | $ 4.1 |  |  |  |
2019 Award | Performance Shares | NOEPS |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares nonvested | 353,302 |  |  |  |  | 353,302 |
2019 Award | Performance Shares | CVI |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares nonvested | 81,528 |  |  |  |  | 81,528 |
2020 award | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted |  | 235,100 |  |  |  |  |
Shares nonvested | 198,303 |  |  |  |  | 198,303 |
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value |  | $ 6.1 |  |  |  |  |
2020 award | Performance Shares | NOEPS |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares nonvested | 349,686 |  |  |  |  | 349,686 |
2020 award | Performance Shares | CVI |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares nonvested | 80,696 |  |  |  |  | 80,696 |
2021 award | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | 285,755 |  |  |  |  |  |
Shares nonvested | 274,796 |  |  |  |  | 274,796 |
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value | $ 5.7 |  |  |  |  |  |
2021 award | Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | 582,944 |  |  |  |  |  |
2021 award | Performance Shares | NOEPS |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares nonvested | 278,328 |  |  |  |  | 278,328 |
2021 Special award | Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | 390,941 |  |  |  |  |  |
Subsequent Event | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares vesting period, (years) |  |  |  | 3 years | 3 years |  |
Subsequent Event | Performance Shares |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares vesting period, (years) |  |  |  | 3 years | 3 years |  |

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