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Preferred and Common Shares and Share-based Compensation - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 44 Months Ended |  |  |
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Feb. 28, 2022 | Jan. 31, 2022 | May 31, 2021 | Sep. 30, 2022 | Jul. 01, 2022 | Oct. 01, 2021 | Sep. 30, 2022 | Oct. 01, 2021 | Sep. 30, 2021 | Jul. 01, 2022 | Dec. 31, 2021 | Feb. 29, 2020 | Oct. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred shares, Authorized |  |  | 7,000,000.0 | 7,000,000 |  |  | 7,000,000 |  |  |  | 7,000,000 |  |
Preferred shares, voting rights |  |  | one vote per share |  |  |  |  |  |  |  |  |  |
Preferred shares, Issued |  |  |  | 0 |  |  | 0 |  |  |  | 0 |  |
Preferred shares, outstanding |  |  |  | 0 |  |  | 0 |  |  |  | 0 |  |
Repurchase of common stock |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |
Share-based compensation expense recognized |  |  |  | $ 5,954,000 |  | $ 8,490,000 |  | $ 20,169,000 | $ 17,809,000 |  |  |  |
Selling, General and Administrative Expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense recognized |  |  |  | $ 4,649,000 |  | $ 4,360,000 |  | 13,123,000 | $ 13,906,000 |  |  |  |
Share-Based Payment Arrangement, Option |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of stock options granted |  |  |  |  |  |  | $ 1,900,000 |  |  |  |  |  |
Expected annual dividend yield |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
TSR Performance-based Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Expected annual dividend yield |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | Deferred Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of outstanding shares |  |  |  | 38,000 |  |  | 38,000 |  |  |  | 91,000 |  |
Conversion of stock, converted to common shares |  |  |  |  |  |  | 52,000 |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | Share-Based Payment Arrangement, Option |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting/Performance period | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Stock options, Granted | 40,000 |  |  |  |  |  | 40,000 |  |  |  |  |  |
Stock options, Expiration Period | 7 years |  |  |  |  |  |  |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | Restricted Stock Units and Deferred Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of stock units vested |  |  |  |  |  |  | $ 18,100,000 |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | Restricted Stock Units and Deferred Stock Units | Board of Directors | Selling, General and Administrative Expenses |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense recognized |  |  |  |  |  |  | $ 1,100,000 | $ 1,100,000 |  |  |  |  |
Amended and Restated 2010 Incentive Plan | Restricted Stock Units (RSUs) | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting/Performance period |  |  |  |  |  |  | 5 years |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | Restricted Stock Units (RSUs) | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting/Performance period |  |  |  |  |  |  | 0 years |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | EPS Performance-based Restricted Stock Units | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Range of percentage of shares to be issued upon settlement following vesting of target number of shares |  |  |  |  |  |  | 200.00% |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | EPS Performance-based Restricted Stock Units | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Range of percentage of shares to be issued upon settlement following vesting of target number of shares |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | TSR Performance-based Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting/Performance period |  |  |  |  |  |  | 3 years |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | TSR Performance-based Restricted Stock Units | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Range of percentage of shares to be issued upon settlement following vesting of target number of shares |  |  |  |  |  |  | 200.00% |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | TSR Performance-based Restricted Stock Units | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Range of percentage of shares to be issued upon settlement following vesting of target number of shares |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | ATI Performance-based Restricted Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting/Performance period |  | 4 years |  |  |  |  |  |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | ATI Performance-based Restricted Stock Units | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Range of percentage of shares to be issued upon settlement following vesting of target number of shares |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | ATI Performance-based Restricted Stock Units | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Range of percentage of shares to be issued upon settlement following vesting of target number of shares |  | 0.00% |  |  |  |  |  |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | Performance Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total fair value of stock units vested |  |  |  |  |  |  | $ 7,200,000 |  |  |  |  |  |
Maximum number of common shares to be earned under these PSU grants |  |  |  | 343,000 |  |  | 343,000 |  |  |  |  |  |
Amended and Restated 2010 Incentive Plan | EPS and TSR Performance Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting/Performance period |  |  |  |  |  |  | 3 years |  |  |  |  |  |
2018 Repurchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock repurchase program authorized amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 25,000,000.0
Shares repurchased |  |  |  |  | 80,000 |  |  |  |  | 264,000 |  |  |
Repurchase of common stock |  |  |  |  | $ 9,500,000 |  |  |  |  | $ 25,000,000.0 |  |  |
Shares repurchased, average cost per share |  |  |  |  | $ 118.97 |  |  |  |  | $ 94.57 |  |  |
2020 Repurchase Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock repurchase program authorized amount |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000.0 |
Shares repurchased |  |  |  |  | 4,000 |  |  |  |  |  |  |  |
Repurchase of common stock |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |
Shares repurchased, average cost per share |  |  |  |  | $ 116.95 |  |  |  |  |  |  |  |
Available for share repurchases |  |  |  | $ 49,500,000 |  |  | $ 49,500,000 |  |  |  |  |  |

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