Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Cumulative Effect, Period of Adoption, Adjustment | Common Stock Issued | Additional Paid-in Capital | Accumulated Earnings (Deficit) | Accumulated Earnings (Deficit)Cumulative Effect, Period of Adoption, Adjustment | AOCL | [1] | Treasury Stock |
Beginning balance (in shares) at Dec. 31, 2019 | | | 16.4 | | | | | 0.3 |
Beginning balance at Dec. 31, 2019 | $ 536.2 | $ (0.3) | $ 0.2 | $ 618 | $ (35.3) | $ (0.3) | $ (33.1) | $ (13.6) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | (0.4) | | | | (0.4) | | | |
Other comprehensive income (loss) | (14) | | | | | | (14) | |
Stock-based compensation | 9.4 | | | 9.4 | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings (in shares) | | | 0.1 | | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings | (0.6) | | $ 0 | (0.6) | | | | |
Treasury stock purchases (in shares) | | | | | | | | (0.4) |
Treasury stock purchases | (3.5) | | | | | | | $ (3.5) |
Ending balance (in shares) at Mar. 31, 2020 | | | 16.5 | | | | | 0.7 |
Ending balance at Mar. 31, 2020 | 526.8 | | $ 0.2 | 626.8 | (36) | | (47.1) | $ (17.1) |
Beginning balance (in shares) at Dec. 31, 2019 | | | 16.4 | | | | | 0.3 |
Beginning balance at Dec. 31, 2019 | 536.2 | $ (0.3) | $ 0.2 | 618 | (35.3) | $ (0.3) | (33.1) | $ (13.6) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | 2.2 | | | | | | | |
Other comprehensive income (loss) | (5.9) | | | | | | | |
Ending balance (in shares) at Sep. 30, 2020 | | | 16.6 | | | | | 0.7 |
Ending balance at Sep. 30, 2020 | 542.8 | | $ 0.2 | 632.1 | (33.4) | | (39) | $ (17.1) |
Beginning balance (in shares) at Mar. 31, 2020 | | | 16.5 | | | | | 0.7 |
Beginning balance at Mar. 31, 2020 | 526.8 | | $ 0.2 | 626.8 | (36) | | (47.1) | $ (17.1) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | (18.5) | | | | (18.5) | | | |
Other comprehensive income (loss) | 4.2 | | | | | | 4.2 | |
Stock-based compensation | 0.7 | | | 0.7 | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings (in shares) | | | 0.1 | | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings | (0.2) | | $ 0 | (0.2) | | | | |
Ending balance (in shares) at Jun. 30, 2020 | | | 16.6 | | | | | 0.7 |
Ending balance at Jun. 30, 2020 | 513 | | $ 0.2 | 627.3 | (54.5) | | (42.9) | $ (17.1) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | 21.1 | | | | 21.1 | | | |
Other comprehensive income (loss) | 3.9 | | | | | | 3.9 | |
Stock-based compensation | 4.8 | | | 4.8 | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings (in shares) | | | 0 | | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings | 0 | | $ 0 | 0 | | | | |
Ending balance (in shares) at Sep. 30, 2020 | | | 16.6 | | | | | 0.7 |
Ending balance at Sep. 30, 2020 | 542.8 | | $ 0.2 | 632.1 | (33.4) | | (39) | $ (17.1) |
Beginning balance (in shares) at Dec. 31, 2020 | | | 16.6 | | | | | 0.7 |
Beginning balance at Dec. 31, 2020 | 583.1 | | $ 0.2 | 634.9 | (1.4) | | (33.5) | $ (17.1) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | 21.3 | | | | 21.3 | | | |
Other comprehensive income (loss) | (0.3) | | | | | | (0.3) | |
Stock-based compensation | 1.2 | | | 1.2 | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings (in shares) | | | 0.2 | | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings | (3.3) | | $ 0 | (3.3) | | | | |
Treasury stock purchases (in shares) | | | | | | | | (0.6) |
Treasury stock purchases | (24.6) | | | | | | | $ (24.6) |
Ending balance (in shares) at Mar. 31, 2021 | | | 16.8 | | | | | 1.3 |
Ending balance at Mar. 31, 2021 | 577.4 | | $ 0.2 | 632.8 | 19.9 | | (33.8) | $ (41.7) |
Beginning balance (in shares) at Dec. 31, 2020 | | | 16.6 | | | | | 0.7 |
Beginning balance at Dec. 31, 2020 | 583.1 | | $ 0.2 | 634.9 | (1.4) | | (33.5) | $ (17.1) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | 87.7 | | | | | | | |
Other comprehensive income (loss) | (1.1) | | | | | | | |
Ending balance (in shares) at Sep. 30, 2021 | | | 17 | | | | | 2.4 |
Ending balance at Sep. 30, 2021 | 567 | | $ 0.2 | 632.2 | 86.3 | | (34.6) | $ (117.1) |
Beginning balance (in shares) at Mar. 31, 2021 | | | 16.8 | | | | | 1.3 |
Beginning balance at Mar. 31, 2021 | 577.4 | | $ 0.2 | 632.8 | 19.9 | | (33.8) | $ (41.7) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | 26.4 | | | | 26.4 | | | |
Other comprehensive income (loss) | 3.1 | | | | | | 3.1 | |
Stock-based compensation | 3.5 | | | 3.5 | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings (in shares) | | | 0.2 | | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings | (5) | | $ 0 | (5) | | | | |
Treasury stock purchases (in shares) | | | | | | | | (0.4) |
Treasury stock purchases | (25.8) | | | | | | | $ (25.8) |
Ending balance (in shares) at Jun. 30, 2021 | | | 17 | | | | | 1.7 |
Ending balance at Jun. 30, 2021 | 579.6 | | $ 0.2 | 631.3 | 46.3 | | (30.7) | $ (67.5) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income (loss) | 40 | | | | 40 | | | |
Other comprehensive income (loss) | (3.9) | | | | | | (3.9) | |
Stock-based compensation | 1 | | | 1 | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings (in shares) | | | 0 | | | | | |
Issuance of common stock, net of stock received for minimum tax withholdings | (0.1) | | $ 0 | (0.1) | | | | |
Treasury stock purchases (in shares) | | | | | | | | (0.7) |
Treasury stock purchases | (49.6) | | | | | | | $ (49.6) |
Ending balance (in shares) at Sep. 30, 2021 | | | 17 | | | | | 2.4 |
Ending balance at Sep. 30, 2021 | $ 567 | | $ 0.2 | $ 632.2 | $ 86.3 | | $ (34.6) | $ (117.1) |
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[1] | Accumulated other comprehensive loss. |