Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Total |
Balance at Dec. 31, 2018 | $ (731,105) | | $ 2,157 | $ 810,928 | $ (15,001) | $ 66,979 |
Balance (in shares) at Dec. 31, 2018 | | | 21,573 | | 914 | |
Net income (loss) | 21,663 | | | | | 21,663 |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net | | | | 7 | $ (156) | (149) |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net (in shares) | | | | | 83 | |
Stock-based compensation expense | | | | 417 | | 417 |
Stock options exercised, net of tax withholdings | | | | | | |
Stock options exercised, net of tax withholdings (in shares) | | | | | 1 | |
Other comprehensive income (loss) | | (31) | | | | (31) |
Balance at Mar. 31, 2019 | (709,442) | (31) | $ 2,157 | 811,352 | $ (15,157) | 88,879 |
Balance (in shares) at Mar. 31, 2019 | | | 21,573 | | 998 | |
Balance at Dec. 31, 2018 | (731,105) | | $ 2,157 | 810,928 | $ (15,001) | 66,979 |
Balance (in shares) at Dec. 31, 2018 | | | 21,573 | | 914 | |
Net income (loss) | | | | | | 57,756 |
Balance at Jun. 30, 2019 | (673,349) | (25) | $ 2,157 | 810,401 | $ (13,968) | 125,216 |
Balance (in shares) at Jun. 30, 2019 | | | 21,573 | | 921 | |
Balance at Mar. 31, 2019 | (709,442) | (31) | $ 2,157 | 811,352 | $ (15,157) | 88,879 |
Balance (in shares) at Mar. 31, 2019 | | | 21,573 | | 998 | |
Net income (loss) | 36,093 | | | | | 36,093 |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net | | | | (1,220) | $ 1,189 | (31) |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net (in shares) | | | | | (77) | |
Stock-based compensation expense | | | | 269 | | 269 |
Other comprehensive income (loss) | | 6 | | | | 6 |
Balance at Jun. 30, 2019 | (673,349) | (25) | $ 2,157 | 810,401 | $ (13,968) | 125,216 |
Balance (in shares) at Jun. 30, 2019 | | | 21,573 | | 921 | |
Balance at Dec. 31, 2019 | (697,223) | (25) | $ 2,157 | 810,856 | $ (14,024) | 101,741 |
Balance (in shares) at Dec. 31, 2019 | | | 21,573 | | 930 | |
Net income (loss) | (16,008) | | | | | (16,008) |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net | | | | (32) | $ 104 | 72 |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net (in shares) | | | | | (6) | |
Stock-based compensation expense | | | | 3 | | 3 |
Balance at Mar. 31, 2020 | (713,231) | (25) | $ 2,157 | 810,827 | $ (13,920) | 85,808 |
Balance (in shares) at Mar. 31, 2020 | | | 21,573 | | 924 | |
Balance at Dec. 31, 2019 | (697,223) | (25) | $ 2,157 | 810,856 | $ (14,024) | 101,741 |
Balance (in shares) at Dec. 31, 2019 | | | 21,573 | | 930 | |
Net income (loss) | | | | | | (25,919) |
Balance at Jun. 30, 2020 | (724,943) | (25) | $ 2,157 | 809,255 | $ (12,130) | 74,314 |
Balance (in shares) at Jun. 30, 2020 | | | 21,573 | | 810 | |
Balance at Mar. 31, 2020 | (713,231) | (25) | $ 2,157 | 810,827 | $ (13,920) | 85,808 |
Balance (in shares) at Mar. 31, 2020 | | | 21,573 | | 924 | |
Net income (loss) | (9,911) | | | | | (9,911) |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net | | | | (1,718) | $ 1,790 | 72 |
Restricted stock awards, forfeitures and shares repurchased for tax withholdings, net (in shares) | | | | | (114) | |
Stock-based compensation expense | | | | 146 | | 146 |
Change in accounting at ownership interests | (1,801) | | | | | (1,801) |
Balance at Jun. 30, 2020 | $ (724,943) | $ (25) | $ 2,157 | $ 809,255 | $ (12,130) | $ 74,314 |
Balance (in shares) at Jun. 30, 2020 | | | 21,573 | | 810 | |