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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Noncontrolling Interest [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2017 | $ 512 | $ 896,759 | $ (13,253) | $ (479,170) | $ (26,692) |  | $ 378,156
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 27,339 |  |  | 27,339
Tax benefit or Translation adjustment related to adoption of ASU at Mar. 31, 2018 |  |  |  | (134) |  |  | (134)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Other comprehensive income (loss), net of income taxes |  |  |  |  | 78 |  | 78
Payment of dividends |  | 167 | (454) | (43,461) |  |  | (43,748)
Restricted stock units and stock options surrendered | 1 | (3,692) |  |  |  |  | (3,691)
Stock-based compensation expense |  | 1,923 |  |  |  |  | 1,923
Ending balance at Mar. 31, 2018 | 513 | 895,157 | (13,707) | (495,426) | (26,614) |  | 359,923
Beginning balance at Dec. 31, 2017 | 512 | 896,759 | (13,253) | (479,170) | (26,692) |  | 378,156
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 105,476
Ending balance at Sep. 30, 2018 | 513 | 898,845 | (14,195) | (504,577) | (23,091) |  | 357,495
Beginning balance at Mar. 31, 2018 | 513 | 895,157 | (13,707) | (495,426) | (26,614) |  | 359,923
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 55,546 |  |  | 55,546
Other comprehensive income (loss), net of income taxes |  |  |  |  | 84 |  | 84
Payment of dividends |  | 102 | (488) | (43,399) |  |  | (43,785)
Restricted stock units and stock options surrendered |  | (80) |  |  |  |  | (80)
Stock-based compensation expense |  | 2,006 |  |  |  |  | 2,006
Ending balance at Jun. 30, 2018 | 513 | 897,185 | (14,195) | (483,279) | (26,530) |  | 373,694
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 22,591 |  |  | 22,591
Other comprehensive income (loss), net of income taxes |  |  |  |  | 3,439 |  | 3,439
Payment of dividends |  | 115 |  | (43,889) |  |  | (43,774)
Restricted stock units and stock options surrendered |  | (350) |  |  |  |  | (350)
Stock-based compensation expense |  | 1,895 |  |  |  |  | 1,895
Ending balance at Sep. 30, 2018 | 513 | 898,845 | (14,195) | (504,577) | (23,091) |  | 357,495
Beginning balance at Dec. 31, 2018 | 513 | 900,795 | (15,183) | (388,524) | (28,024) |  | 469,577
Beginning balance at Dec. 31, 2018 |  |  |  |  |  | $ 287,433 | 287,433
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 29,408 |  | (6,738) | 29,408
Adjustment of noncontrolling interest to redemption value |  |  |  | (10,420) |  | 10,420 | (10,420)
Tax benefit or Translation adjustment related to adoption of ASU (ASU 2018-02 [Member]) at Mar. 31, 2019 |  |  |  | 2,707 | (2,707) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Other comprehensive income (loss), net of income taxes |  |  |  |  | 109 |  | 109
Payment of dividends |  | 168 | (504) | (46,076) |  |  | (46,412)
Restricted stock units and stock options surrendered | 1 | (3,825) |  |  |  |  | (3,824)
Stock-based compensation expense |  | 2,026 |  |  |  |  | 2,026
Ending balance at Mar. 31, 2019 | 514 | 899,164 | (15,687) | (412,905) | (30,622) |  | 440,464
Ending balance at Mar. 31, 2019 |  |  |  |  |  | 291,115 |
Beginning balance at Dec. 31, 2018 | 513 | 900,795 | (15,183) | (388,524) | (28,024) |  | 469,577
Beginning balance at Dec. 31, 2018 |  |  |  |  |  | 287,433 | 287,433
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 101,140
Tax benefit or Translation adjustment related to adoption of ASU (ASU 2018-02 [Member]) at Sep. 30, 2019 |  |  |  |  |  |  | 2,700
Tax benefit or Translation adjustment related to adoption of ASU at Sep. 30, 2019 |  |  |  |  | (2,707) |  |
Ending balance at Sep. 30, 2019 | 514 | 900,247 | (16,763) | (534,403) | (38,117) |  | 311,478
Ending balance at Sep. 30, 2019 |  |  |  |  |  | 279,352 | 279,352
Beginning balance at Mar. 31, 2019 | 514 | 899,164 | (15,687) | (412,905) | (30,622) |  | 440,464
Beginning balance at Mar. 31, 2019 |  |  |  |  |  | 291,115 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 49,383 |  | (3,099) | 49,383
Adjustment of noncontrolling interest to redemption value |  |  |  | (10,293) |  | 10,293 | (10,293)
Other comprehensive income (loss), net of income taxes |  |  |  |  | 98 |  | 98
Payment of dividends |  | 93 |  | (46,593) |  |  | (46,500)
Distribution from consolidated joint venture |  |  |  |  |  | (10,591) |
Restricted stock units and stock options surrendered |  | (63) |  |  |  |  | (63)
Stock-based compensation expense |  | 1,935 |  |  |  |  | 1,935
Ending balance at Jun. 30, 2019 | 514 | 901,129 | (15,687) | (420,408) | (30,524) |  | 435,024
Ending balance at Jun. 30, 2019 |  |  |  |  |  | 287,718 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income |  |  |  | 22,349 |  | (1,459) | 22,349
Adjustment of noncontrolling interest to redemption value |  |  |  | (90,877) |  | 90,877 | (90,877)
Tax benefit or Translation adjustment related to adoption of ASU (ASU 2018-02 [Member]) at Sep. 30, 2019 |  |  |  |  |  |  | 2,700
Tax benefit or Translation adjustment related to adoption of ASU at Sep. 30, 2019 |  |  |  |  | (2,707) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Other comprehensive income (loss), net of income taxes |  |  |  |  | (7,593) |  | (7,593)
Purchase of additional ownership interest in consolidated joint venture |  | (2,899) |  |  |  | (2,582) | (2,899)
Payment of dividends |  | 135 | (1,076) | (45,467) |  |  | (46,408)
Exercise of stock options |  | 71 |  |  |  |  | 71
Distribution from consolidated joint venture |  |  |  |  |  | (95,202) |
Restricted stock units and stock options surrendered |  | (90) |  |  |  |  | (90)
Stock-based compensation expense |  | 1,901 |  |  |  |  | 1,901
Ending balance at Sep. 30, 2019 | $ 514 | $ 900,247 | $ (16,763) | $ (534,403) | $ (38,117) |  | 311,478
Ending balance at Sep. 30, 2019 |  |  |  |  |  | $ 279,352 | $ 279,352

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