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Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 27, 2019 | May 08, 2019 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Nov. 06, 2018 | May 10, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |
Common stock shares authorized |  |  | 100,000,000.0 |  | 100,000,000 |  |
Common stock, par value |  |  | $ 0.01 |  | $ 0.01 |  |
Preferred stock shares authorized |  |  | 50,000,000.0 |  | 50,000,000 |  |
Preferred stock, par value |  |  | $ 0.01 |  | $ 0.01 |  |
Common stock shares issued |  |  | 33,038,361 |  | 33,760,940 |  |
Common stock shares outstanding |  |  | 33,038,361 |  | 33,760,940 |  |
Preferred stock shares outstanding |  |  | 0 |  | 0 |  |
Shares authorized to be repurchased |  |  |  |  |  | 4,500,000 |
Treasury Stock Acquired, Average Cost Per Share |  |  | $ 61.52 |  |  |  |
Treasury Stock, Value, Acquired, Cost Method |  |  | $ 62.4 |  |  |  |
Treasury Stock, Shares, Acquired |  |  | 1,000,000.0 |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  |  | $ 12.1 | $ 12.2 |  |  |
Treasury Stock, Retired, Cost Method, Amount |  |  | $ 62.4 |  |  |  |
Treasury Stock, Shares, Retired |  |  | 1,000,000.0 |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Shares available to be purchased |  |  | 2,799,552 |  |  |  |
First Amended And Restated 2013 Long-Term Incentive Plan [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Common stock shares for stock award issuance |  |  |  |  |  |  | 1,800,000
2017 Incentive Plan [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Common stock shares rolled into plan |  |  |  |  |  |  | 600,000
Amended 2017 Incentive Plan [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Additional shares authorized |  | 1,600,000 |  |  |  |  |
Common stock shares for stock award, available for issuance |  |  | 300,000 |  |  |  |
Vesting of stock-based compensation awards, shares |  |  | 500,000 | 600,000 |  |  |
Distribution Agreement [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Aggregate offering price | $ 100.0 |  |  |  |  |  |
Available for sale, common stock |  |  | $ 100.0 |  |  |  |
Common stock shares sold and issued |  |  | 0 | 0 |  |  |

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