CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands | Total | Common StockClass A Common | Common StockClass B Common | Treasury Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive (Loss) Income | Cumulative Effect, Period of Adoption, Adjustment | Cumulative Effect, Period of Adoption, AdjustmentRetained Earnings |
Beginning balance (in shares) at Dec. 31, 2018 | | 86,679,575 | 80,608,685 | (14,620,175) | | | | | |
Beginning balance at Dec. 31, 2018 | $ 682,589 | $ 0 | $ 1 | $ (199,817) | $ 618,674 | $ 270,471 | $ (6,740) | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Stock-based compensation expense | 5,163 | | | | 5,163 | | | | |
Conversion Class B to Class A common stock (in shares) | | 460,000 | (460,000) | | | | | | |
Issuance of shares related to restricted stock units and awards, net of forfeitures (in shares) | | 759,409 | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock (in shares) | | (82,978) | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock | (1,086) | | | | (1,086) | | | | |
Other comprehensive income (loss) | (8,054) | | | | | | (8,054) | | |
Net income (loss) | (8,323) | | | | | (8,323) | | | |
Ending balance (in shares) at Mar. 31, 2019 | | 87,816,006 | 80,148,685 | (14,620,175) | | | | | |
Ending balance at Mar. 31, 2019 | 670,289 | $ 0 | $ 1 | $ (199,817) | 622,751 | 262,148 | (14,794) | | |
Beginning balance (in shares) at Dec. 31, 2018 | | 86,679,575 | 80,608,685 | (14,620,175) | | | | | |
Beginning balance at Dec. 31, 2018 | 682,589 | $ 0 | $ 1 | $ (199,817) | 618,674 | 270,471 | (6,740) | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | (3,785) | | | | | | | | |
Ending balance (in shares) at Jun. 30, 2019 | | 88,549,955 | 80,287,495 | (14,620,175) | | | | | |
Ending balance at Jun. 30, 2019 | 666,134 | $ 0 | $ 1 | $ (199,817) | 625,908 | 266,686 | (26,644) | | |
Beginning balance (in shares) at Mar. 31, 2019 | | 87,816,006 | 80,148,685 | (14,620,175) | | | | | |
Beginning balance at Mar. 31, 2019 | 670,289 | $ 0 | $ 1 | $ (199,817) | 622,751 | 262,148 | (14,794) | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Stock-based compensation expense | 2,740 | | | | 2,740 | | | | |
Exercise of stock options (in shares) | | 85,038 | 139,270 | | | | | | |
Exercise of stock options | 1,817 | | | | 1,817 | | | | |
Conversion Class B to Class A common stock (in shares) | | 460 | (460) | | | | | | |
Issuance of shares related to restricted stock units and awards, net of forfeitures (in shares) | | 753,800 | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock (in shares) | | (105,349) | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock | (1,400) | | | | (1,400) | | | | |
Other comprehensive income (loss) | (11,850) | | | | | | (11,850) | | |
Net income (loss) | 4,538 | | | | | 4,538 | | | |
Ending balance (in shares) at Jun. 30, 2019 | | 88,549,955 | 80,287,495 | (14,620,175) | | | | | |
Ending balance at Jun. 30, 2019 | $ 666,134 | $ 0 | $ 1 | $ (199,817) | 625,908 | 266,686 | (26,644) | | |
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201613Member | | | | | | | | |
Beginning balance (in shares) at Dec. 31, 2019 | | 90,327,728 | 79,369,411 | (14,620,175) | | | | | |
Beginning balance at Dec. 31, 2019 | $ 688,159 | $ 1 | $ 0 | $ (199,817) | 636,461 | 278,246 | (26,732) | $ 65 | $ 65 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Stock-based compensation expense | 7,164 | | | | 7,164 | | | | |
Exercise of stock options (in shares) | | 23,183 | | | | | | | |
Exercise of stock options | 183 | | | | 183 | | | | |
Conversion Class B to Class A common stock (in shares) | | 98,550 | (98,550) | | | | | | |
Issuance of shares related to restricted stock units and awards, net of forfeitures (in shares) | | 574,082 | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock (in shares) | | (148,071) | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock | (2,947) | | | | (2,947) | | | | |
Other comprehensive income (loss) | (24,200) | | | | | | (24,200) | | |
Net income (loss) | (1,683) | | | | | (1,683) | | | |
Ending balance (in shares) at Mar. 31, 2020 | | 90,875,472 | 79,270,861 | (14,620,175) | | | | | |
Ending balance at Mar. 31, 2020 | 666,741 | $ 1 | $ 0 | $ (199,817) | 640,861 | 276,628 | (50,932) | | |
Beginning balance (in shares) at Dec. 31, 2019 | | 90,327,728 | 79,369,411 | (14,620,175) | | | | | |
Beginning balance at Dec. 31, 2019 | 688,159 | $ 1 | $ 0 | $ (199,817) | 636,461 | 278,246 | (26,732) | $ 65 | $ 65 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income (loss) | 342 | | | | | | | | |
Ending balance (in shares) at Jun. 30, 2020 | | 90,709,951 | 79,270,861 | (14,620,175) | | | | | |
Ending balance at Jun. 30, 2020 | 671,536 | $ 1 | $ 0 | $ (199,817) | 646,455 | 278,653 | (53,756) | | |
Beginning balance (in shares) at Mar. 31, 2020 | | 90,875,472 | 79,270,861 | (14,620,175) | | | | | |
Beginning balance at Mar. 31, 2020 | 666,741 | $ 1 | $ 0 | $ (199,817) | 640,861 | 276,628 | (50,932) | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Stock-based compensation expense | 7,757 | | | | 7,757 | | | | |
Exercise of stock options (in shares) | | 0 | | | | | | | |
Exercise of stock options | 0 | | | | 0 | | | | |
Conversion Class B to Class A common stock (in shares) | | 0 | 0 | | | | | | |
Issuance of shares related to restricted stock units and awards, net of forfeitures (in shares) | | (40,849) | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock (in shares) | | (124,672) | | | | | | | |
Shares withheld for employee taxes upon conversion of restricted stock | (2,163) | | | | (2,163) | | | | |
Other comprehensive income (loss) | (2,824) | | | | | | (2,824) | | |
Net income (loss) | 2,025 | | | | | 2,025 | | | |
Ending balance (in shares) at Jun. 30, 2020 | | 90,709,951 | 79,270,861 | (14,620,175) | | | | | |
Ending balance at Jun. 30, 2020 | $ 671,536 | $ 1 | $ 0 | $ (199,817) | $ 646,455 | $ 278,653 | $ (53,756) | | |