Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions | Total | Common Stock Issued | Additional Paid-in Capital | Treasury Stock | Retained Earnings | Accumulated Other Comprehensive (Loss) Income |
Beginning balance at Dec. 31, 2019 | $ 591.9 | $ 0.5 | $ 290.6 | $ (112.6) | $ 418.5 | $ (5.1) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued, net of shares withheld for employee taxes | | | (2.4) | | | |
Stock-based compensation expense | | | 4.1 | | | |
Repurchase of common stock | | | | (5.4) | | |
Net income | 21.2 | | | | 21.2 | |
Dividends declared | | | | | (11) | |
Other comprehensive gains (losses) | | | | | | (1.4) |
Ending balance at Jun. 30, 2020 | $ 597 | $ 0.5 | 292.3 | $ (118) | 428.7 | (6.5) |
Beginning balance (in shares) at Dec. 31, 2019 | | 52.7 | | 7.6 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Issuance of stock based instruments, net of shares withheld for employee taxes (in shares) | | 0.2 | | | | |
Repurchase of common stock (in shares) | | | | (0.2) | | |
Ending balance (in shares) at Jun. 30, 2020 | 45.1 | 52.9 | | 7.8 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Dividends declared (in dollars per share) | $ 0.24 | | | | | |
Beginning balance at Mar. 31, 2020 | $ 582.2 | $ 0.5 | 290.2 | $ (118) | 417.3 | (7.8) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued, net of shares withheld for employee taxes | | | 0 | | | |
Stock-based compensation expense | | | 2.1 | | | |
Repurchase of common stock | | | | 0 | | |
Net income | 16.9 | | | | 16.9 | |
Dividends declared | | | | | (5.5) | |
Other comprehensive gains (losses) | | | | | | 1.3 |
Ending balance at Jun. 30, 2020 | $ 597 | $ 0.5 | 292.3 | $ (118) | 428.7 | (6.5) |
Beginning balance (in shares) at Mar. 31, 2020 | | 52.9 | | 7.8 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Issuance of stock based instruments, net of shares withheld for employee taxes (in shares) | | 0 | | | | |
Repurchase of common stock (in shares) | | | | 0 | | |
Ending balance (in shares) at Jun. 30, 2020 | 45.1 | 52.9 | | 7.8 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Dividends declared (in dollars per share) | $ 0.12 | | | | | |
Beginning balance at Dec. 31, 2020 | $ 631.9 | $ 0.5 | 298.3 | $ (123) | 459.7 | (3.6) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued, net of shares withheld for employee taxes | | | (4.3) | | | |
Stock-based compensation expense | | | 4.9 | | | |
Repurchase of common stock | | | | 0 | | |
Net income | 24 | | | | 24 | |
Dividends declared | | | | | (12.3) | |
Other comprehensive gains (losses) | | | | | | 0.9 |
Ending balance at Jun. 30, 2021 | $ 645.1 | $ 0.5 | 298.9 | $ (123) | 471.4 | (2.7) |
Beginning balance (in shares) at Dec. 31, 2020 | | 52.9 | | 8 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Issuance of stock based instruments, net of shares withheld for employee taxes (in shares) | | 0.3 | | | | |
Repurchase of common stock (in shares) | | | | 0 | | |
Ending balance (in shares) at Jun. 30, 2021 | 45.2 | 53.2 | | 8 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Dividends declared (in dollars per share) | $ 260,000 | | | | | |
Beginning balance at Mar. 31, 2021 | $ 632.8 | $ 0.5 | 296.6 | $ (123) | 461.9 | (3.2) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Common stock issued, net of shares withheld for employee taxes | | | (0.2) | | | |
Stock-based compensation expense | | | 2.5 | | | |
Repurchase of common stock | | | | 0 | | |
Net income | 15.5 | | | | 15.5 | |
Dividends declared | | | | | (6) | |
Other comprehensive gains (losses) | | | | | | 0.5 |
Ending balance at Jun. 30, 2021 | $ 645.1 | $ 0.5 | $ 298.9 | $ (123) | $ 471.4 | $ (2.7) |
Beginning balance (in shares) at Mar. 31, 2021 | | 53.2 | | 8 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Issuance of stock based instruments, net of shares withheld for employee taxes (in shares) | | 0 | | | | |
Repurchase of common stock (in shares) | | | | 0 | | |
Ending balance (in shares) at Jun. 30, 2021 | 45.2 | 53.2 | | 8 | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | |
Dividends declared (in dollars per share) | $ 130,000 | | | | | |