UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Cumulative Effect Adjustment | Preferred Stock | Common Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Retained EarningsCumulative Effect Adjustment | MYR Group Inc. Stockholders' Equity | MYR Group Inc. Stockholders' EquityCumulative Effect Adjustment | Noncontrolling Interest |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Adjustment to adopt ASC 326 | $ 364,475 | $ (268) | $ 0 | $ 166 | $ 152,532 | $ (446) | $ 212,219 | $ (268) | $ 364,471 | $ (268) | $ 4 |
Balance, beginning of period at Dec. 31, 2019 | 364,475 | (268) | 0 | $ 166 | 152,532 | (446) | 212,219 | (268) | 364,471 | (268) | 4 |
Balance, beginning of period (in shares) at Dec. 31, 2019 | | | | 16,649 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Net income | $ 9,932 | | | | | | 9,932 | | 9,932 | | |
Accounting Standards Update [Extensible Enumeration] | Accounting Standards Update 2016-13 [Member] | | | | | | | | | | |
Stock issued under compensation plans, net | $ 82 | | | | 82 | | | | 82 | | |
Stock issued under compensation plans, net (in shares) | | | | 55 | | | | | | | |
Stock-based compensation expense | 1,080 | | | | 1,080 | | | | 1,080 | | |
Shares repurchased | (426) | | | | (241) | | (185) | | (426) | | |
Shares repurchased (in shares) | | | | (20) | | | | | | | |
Other comprehensive income (loss) | 87 | | | | | 87 | | | 87 | | |
Stock issued - other | 24 | | | | 24 | | | | 24 | | |
Stock issued - other (in shares) | | | | 1 | | | | | | | |
Balance, end of period at Mar. 31, 2020 | 374,986 | | 0 | $ 166 | 153,477 | (359) | 221,698 | | 374,982 | | 4 |
Balance, end of period (in shares) at Mar. 31, 2020 | | | | 16,685 | | | | | | | |
Balance, beginning of period at Dec. 31, 2019 | 364,475 | $ (268) | 0 | $ 166 | 152,532 | (446) | 212,219 | $ (268) | 364,471 | $ (268) | 4 |
Balance, beginning of period (in shares) at Dec. 31, 2019 | | | | 16,649 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Net income | 40,609 | | | | | | | | | | |
Other comprehensive income (loss) | 43 | | | | | | | | | | |
Balance, end of period at Sep. 30, 2020 | 408,604 | | 0 | $ 167 | 156,461 | (403) | 252,375 | | 408,600 | | 4 |
Balance, end of period (in shares) at Sep. 30, 2020 | | | | 16,719 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Adjustment to adopt ASC 326 | 374,986 | | 0 | $ 166 | 153,477 | (359) | 221,698 | | 374,982 | | 4 |
Balance, beginning of period at Mar. 31, 2020 | 374,986 | | 0 | $ 166 | 153,477 | (359) | 221,698 | | 374,982 | | 4 |
Balance, beginning of period (in shares) at Mar. 31, 2020 | | | | 16,685 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Net income | 13,385 | | | | | | 13,385 | | 13,385 | | |
Stock issued under compensation plans, net | 1 | | | $ 1 | | | | | 1 | | |
Stock issued under compensation plans, net (in shares) | | | | 23 | | | | | | | |
Stock-based compensation expense | 1,093 | | | | 1,093 | | | | 1,093 | | |
Other comprehensive income (loss) | (39) | | | | | (39) | | | (39) | | |
Stock issued - other | 24 | | | | 24 | | | | 24 | | |
Stock issued - other (in shares) | | | | 1 | | | | | | | |
Balance, end of period at Jun. 30, 2020 | 389,450 | | 0 | $ 167 | 154,594 | (398) | 235,083 | | 389,446 | | 4 |
Balance, end of period (in shares) at Jun. 30, 2020 | | | | 16,709 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Adjustment to adopt ASC 326 | 389,450 | | 0 | $ 167 | 154,594 | (398) | 235,083 | | 389,446 | | 4 |
Net income | 17,292 | | | | | | 17,292 | | 17,292 | | |
Stock issued under compensation plans, net | 224 | | | | 224 | | | | 224 | | |
Stock issued under compensation plans, net (in shares) | | | | 10 | | | | | | | |
Stock-based compensation expense | 1,631 | | | | 1,631 | | | | 1,631 | | |
Other comprehensive income (loss) | (5) | | | | | (5) | | | (5) | | |
Stock issued - other | 12 | | | | 12 | | | | 12 | | |
Balance, end of period at Sep. 30, 2020 | 408,604 | | 0 | $ 167 | 156,461 | (403) | 252,375 | | 408,600 | | 4 |
Balance, end of period (in shares) at Sep. 30, 2020 | | | | 16,719 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Adjustment to adopt ASC 326 | 408,604 | | 0 | $ 167 | 156,461 | (403) | 252,375 | | 408,600 | | 4 |
Adjustment to adopt ASC 326 | 429,292 | | 0 | 167 | 158,618 | 23 | 270,480 | | 429,288 | | 4 |
Balance, beginning of period at Dec. 31, 2020 | 429,292 | | 0 | $ 167 | 158,618 | 23 | 270,480 | | 429,288 | | 4 |
Balance, beginning of period (in shares) at Dec. 31, 2020 | | | | 16,734 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Net income | 19,928 | | | | | | 19,928 | | 19,928 | | |
Stock issued under compensation plans, net | 110 | | | $ 1 | 109 | | | | 110 | | |
Stock issued under compensation plans, net (in shares) | | | | 123 | | | | | | | |
Stock-based compensation expense | 1,487 | | | | 1,487 | | | | 1,487 | | |
Shares repurchased | (2,618) | | | | (2,231) | | (387) | | (2,618) | | |
Shares repurchased (in shares) | | | | (41) | | | | | | | |
Other comprehensive income (loss) | 253 | | | | | 253 | | | 253 | | |
Stock issued - other | 12 | | | | 12 | | | | 12 | | |
Stock issued - other (in shares) | | | | 1 | | | | | | | |
Balance, end of period at Mar. 31, 2021 | 448,464 | | 0 | $ 168 | 157,995 | 276 | 290,021 | | 448,460 | | 4 |
Balance, end of period (in shares) at Mar. 31, 2021 | | | | 16,817 | | | | | | | |
Balance, beginning of period at Dec. 31, 2020 | 429,292 | | 0 | $ 167 | 158,618 | 23 | 270,480 | | 429,288 | | 4 |
Balance, beginning of period (in shares) at Dec. 31, 2020 | | | | 16,734 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Net income | 64,318 | | | | | | | | | | |
Other comprehensive income (loss) | 77 | | | | | | | | | | |
Balance, end of period at Sep. 30, 2021 | 496,180 | | 0 | $ 168 | 161,593 | 100 | 334,315 | | 496,176 | | 4 |
Balance, end of period (in shares) at Sep. 30, 2021 | | | | 16,870 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Adjustment to adopt ASC 326 | 448,464 | | 0 | $ 168 | 157,995 | 276 | 290,021 | | 448,460 | | 4 |
Balance, beginning of period at Mar. 31, 2021 | 448,464 | | 0 | $ 168 | 157,995 | 276 | 290,021 | | 448,460 | | 4 |
Balance, beginning of period (in shares) at Mar. 31, 2021 | | | | 16,817 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Net income | 21,219 | | | | | | 21,219 | | 21,219 | | |
Stock issued under compensation plans, net | 319 | | | $ 1 | 318 | | | | 319 | | |
Stock issued under compensation plans, net (in shares) | | | | 60 | | | | | | | |
Stock-based compensation expense | 1,948 | | | | 1,948 | | | | 1,948 | | |
Shares repurchased | (734) | | | $ (1) | (637) | | (96) | | (734) | | |
Shares repurchased (in shares) | | | | (10) | | | | | | | |
Other comprehensive income (loss) | 413 | | | | | 413 | | | 413 | | |
Balance, end of period at Jun. 30, 2021 | 471,629 | | 0 | $ 168 | 159,624 | 689 | 311,144 | | 471,625 | | 4 |
Balance, end of period (in shares) at Jun. 30, 2021 | | | | 16,867 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Adjustment to adopt ASC 326 | 471,629 | | 0 | $ 168 | 159,624 | 689 | 311,144 | | 471,625 | | 4 |
Net income | 23,171 | | | | | | 23,171 | | 23,171 | | |
Stock issued under compensation plans, net | 54 | | | | 54 | | | | 54 | | |
Stock issued under compensation plans, net (in shares) | | | | 3 | | | | | | | |
Stock-based compensation expense | 1,915 | | | | 1,915 | | | | 1,915 | | |
Other comprehensive income (loss) | (589) | | | | | (589) | | | (589) | | |
Balance, end of period at Sep. 30, 2021 | 496,180 | | 0 | $ 168 | 161,593 | 100 | 334,315 | | 496,176 | | 4 |
Balance, end of period (in shares) at Sep. 30, 2021 | | | | 16,870 | | | | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | | | |
Adjustment to adopt ASC 326 | $ 496,180 | | $ 0 | $ 168 | $ 161,593 | $ 100 | $ 334,315 | | $ 496,176 | | $ 4 |