CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Class A | Common Class B | Common Stock | Common StockCommon Class A | Common StockCommon Class B | Additional Paid-in Capital | Retained Earnings (Accumulated Deficit) | Accumulated Other Comprehensive Income (Loss) |
Beginning Balance at Dec. 31, 2018 | $ 1,334,260 | | | | $ 1,372 | $ 40 | $ 1,693,512 | $ (360,664) | $ 0 |
Beginning Balance (in shares) at Dec. 31, 2018 | | | | | 137,180,213 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | 3,125 | | | | | | | 3,125 | |
Compensation expense related to granting of stock awards | 3,573 | | | | $ 14 | | 3,559 | | |
Compensation expense related to granting of stock awards (in shares) | | | | | 1,406,722 | | | | |
Issuance of common stock related to the Employee Stock Purchase Plan ("ESPP") | 379 | | | | $ 1 | | 378 | | |
Issuance of common stock related to the Employee Stock Purchase Plan (ESPP) (in shares) | | | | | 84,958 | | | | |
Exercise of stock options | 244 | | | | $ 2 | | 242 | | |
Exercise of stock options (in shares) | | | | | 180,300 | | | | |
Purchase of vested employee restricted stock units | (1,426) | | | | $ (2) | | (1,424) | | |
Purchase of vested employee restricted stock units (in shares) | | | | | (204,499) | | | | |
Payment of dividends on common stock | (12,913) | | | | | | (12,913) | | |
Dividend equivalents, net of forfeitures | (463) | | | | | | (463) | | |
Ending Balance at Mar. 31, 2019 | 1,331,498 | | | | $ 1,387 | $ 40 | 1,682,891 | (352,820) | 0 |
Ending Balance (in shares) at Mar. 31, 2019 | | | | | 138,647,694 | 4,045,199 | | | |
Beginning Balance at Dec. 31, 2018 | 1,334,260 | | | | $ 1,372 | $ 40 | 1,693,512 | (360,664) | 0 |
Beginning Balance (in shares) at Dec. 31, 2018 | | | | | 137,180,213 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | 67,323 | | | | | | | | |
Net unrealized gain (loss) on derivatives | (577) | | | | | | | | |
Ending Balance at Sep. 30, 2019 | 1,367,870 | $ 1,337 | $ 40 | | | | 1,655,690 | (288,620) | (577) |
Ending Balance (in shares) at Sep. 30, 2019 | | 133,583,672 | 4,045,199 | | | | | | |
Beginning Balance at Mar. 31, 2019 | 1,331,498 | | | | $ 1,387 | $ 40 | 1,682,891 | (352,820) | 0 |
Beginning Balance (in shares) at Mar. 31, 2019 | | | | | 138,647,694 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | 25,992 | | | | | | | 25,992 | |
Compensation expense related to granting of stock awards | 3,393 | | | | | | 3,393 | | |
Compensation expense related to granting of stock awards (in shares) | | | | | (38,774) | | | | |
Issuance of common stock related to the Employee Stock Purchase Plan ("ESPP") | 364 | | | | $ 1 | | 363 | | |
Issuance of common stock related to the Employee Stock Purchase Plan (ESPP) (in shares) | | | | | 73,791 | | | | |
Purchase of vested employee restricted stock units | (1,300) | | | | $ (2) | | (1,298) | | |
Purchase of vested employee restricted stock units (in shares) | | | | | (216,828) | | | | |
Payment of dividends on common stock | (13,140) | | | | | | (13,140) | | |
Dividend equivalents, net of forfeitures | 1,059 | | | | | | 1,059 | | |
Net unrealized gain (loss) on derivatives | (224) | | | | | | | | (224) |
Ending Balance at Jun. 30, 2019 | 1,347,642 | | | | $ 1,386 | $ 40 | 1,673,268 | (326,828) | (224) |
Ending Balance (in shares) at Jun. 30, 2019 | | | | | 138,465,883 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | 38,208 | | | | | | | 38,208 | |
Compensation expense related to granting of stock awards | 3,165 | $ 0 | | | | | 3,165 | | |
Compensation expense related to granting of stock awards (in shares) | | 18,232 | | | | | | | |
Issuance of common stock related to the Employee Stock Purchase Plan ("ESPP") | 288 | $ 1 | | | | | 287 | | |
Issuance of common stock related to the Employee Stock Purchase Plan (ESPP) (in shares) | | 100,965 | | | | | | | |
Common stock repurchase | (18,340) | | | $ (50) | | | (18,290) | | |
Common stock repurchase (in shares) | | (5,000,000) | | | | | | | |
Purchase of vested employee restricted stock units | (4) | | | | | | (4) | | |
Purchase of vested employee restricted stock units (in shares) | | (1,408) | | | | | | | |
Payment of dividends on common stock | (2,684) | | | | | | (2,684) | 0 | |
Dividend equivalents, net of forfeitures | (52) | | | | | | (52) | 0 | |
Net unrealized gain (loss) on derivatives | (353) | | | | | | | | (353) |
Ending Balance at Sep. 30, 2019 | 1,367,870 | $ 1,337 | $ 40 | | | | 1,655,690 | (288,620) | (577) |
Ending Balance (in shares) at Sep. 30, 2019 | | 133,583,672 | 4,045,199 | | | | | | |
Beginning Balance at Dec. 31, 2019 | 881,443 | | | | $ 1,339 | $ 40 | 1,655,781 | (775,578) | (139) |
Beginning Balance (in shares) at Dec. 31, 2019 | | | | | 133,867,621 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | (9,138) | | | | | | | (9,138) | |
Compensation expense related to granting of stock awards | 4,117 | | | | $ 4 | | 4,113 | | |
Compensation expense related to granting of stock awards (in shares) | | | | | 440,129 | | | | |
Issuance of common stock related to the Employee Stock Purchase Plan ("ESPP") | 241 | | | | $ 2 | | 239 | | |
Issuance of common stock related to the Employee Stock Purchase Plan (ESPP) (in shares) | | | | | 165,756 | | | | |
Purchase of vested employee restricted stock units | (1,394) | | | | $ (4) | | (1,390) | | |
Purchase of vested employee restricted stock units (in shares) | | | | | (432,472) | | | | |
Payment of dividends on common stock | (3,221) | | | | | | (3,221) | | |
Dividend equivalents, net of forfeitures | 493 | | | | | | 493 | | |
Net unrealized gain (loss) on derivatives | (2,354) | | | | | | | | (2,354) |
Ending Balance at Mar. 31, 2020 | 870,187 | | | | $ 1,341 | $ 40 | 1,656,015 | (784,716) | (2,493) |
Ending Balance (in shares) at Mar. 31, 2020 | | | | | 134,041,034 | 4,045,199 | | | |
Beginning Balance at Dec. 31, 2019 | 881,443 | | | | $ 1,339 | $ 40 | 1,655,781 | (775,578) | (139) |
Beginning Balance (in shares) at Dec. 31, 2019 | | | | | 133,867,621 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | $ (79,827) | | | | | | | | |
Compensation expense related to granting of stock awards (in shares) | 66,000 | | | | | | | | |
Net unrealized gain (loss) on derivatives | $ (2,099) | | | | | | | | |
Ending Balance at Sep. 30, 2020 | 803,687 | $ 1,340 | $ 40 | | | | 1,659,950 | (855,405) | (2,238) |
Ending Balance (in shares) at Sep. 30, 2020 | | 133,949,367 | 4,045,199 | | | | | | |
Beginning Balance at Mar. 31, 2020 | 870,187 | | | | $ 1,341 | $ 40 | 1,656,015 | (784,716) | (2,493) |
Beginning Balance (in shares) at Mar. 31, 2020 | | | | | 134,041,034 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | (53,811) | | | | | | | (53,811) | |
Compensation expense related to granting of stock awards | 2,274 | | | | | | 2,274 | | |
Compensation expense related to granting of stock awards (in shares) | | | | | (30,040) | | | | |
Purchase of vested employee restricted stock units | (53) | | | | $ (1) | | (52) | | |
Purchase of vested employee restricted stock units (in shares) | | | | | (41,002) | | | | |
Payment of dividends on common stock | (189) | | | | | | (189) | | |
Dividend equivalents, net of forfeitures | 162 | | | | | | 162 | | |
Net unrealized gain (loss) on derivatives | (260) | | | | | | | | (260) |
Ending Balance at Jun. 30, 2020 | 818,310 | | | | $ 1,340 | $ 40 | 1,658,210 | (838,527) | (2,753) |
Ending Balance (in shares) at Jun. 30, 2020 | | | | | 133,969,992 | 4,045,199 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | (16,878) | | | | | | | (16,878) | |
Compensation expense related to granting of stock awards | 1,784 | $ 0 | | | | | 1,784 | | |
Compensation expense related to granting of stock awards (in shares) | | (20,625) | | | | | | | |
Dividend equivalents, net of forfeitures | (44) | | | | | | (44) | | |
Net unrealized gain (loss) on derivatives | 515 | | | | | | | | 515 |
Ending Balance at Sep. 30, 2020 | $ 803,687 | $ 1,340 | $ 40 | | | | $ 1,659,950 | $ (855,405) | $ (2,238) |
Ending Balance (in shares) at Sep. 30, 2020 | | 133,949,367 | 4,045,199 | | | | | | |