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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional paid-in capital [Member] | Retained earnings [Member] | Treasury stock [Member] | Accumulated other comprehensive income (loss) [Member] | Parent [Member] | Noncontrolling interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, Beginning (in shares) at Dec. 31, 2018 |  | 59,916,973 |  |  |  |  |  |
Balance, Beginning at Dec. 31, 2018 | $ (270,097) |  | $ (519,498) | $ 29,048 | $ 7,831 | $ 203,571 | $ (279,048) | $ 8,951
Net loss |  |  |  | 1,977 |  |  | 1,977 |
Currency translation adjustment, net |  |  |  |  |  | (5,281) | (5,281) | 474
Temporary Equity, Foreign Currency Translation Adjustments | (4,807) |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 466 |  |  |  |  | (466) | 466 |
Dividends declared | (301) |  |  | (301) |  |  | (301) |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | (587) |  |  | 4,346 |  | (4,933) | (587) |
Noncontrolling Interest, Period Increase (Decrease) | 24,882 |  | 9,437 |  |  |  | 9,437 | 15,445
Redemption value adjustment | 776 |  | 776 |  |  |  | (776) |
Stock-based compensation | 269 |  | 269 |  |  |  | 269 |
VIE distributions | 1,054 |  |  |  |  |  | 0 | 1,054
Issuance of stock under 401(k) plan |  | 29,414 |  |  |  |  |  |
Issuance of stock under 401(k) plan | (141) |  | 123 |  | (264) |  | (141) |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | 1,341 |  |  |  |  |  |  | (636)
Balance, Ending (in shares) at Mar. 31, 2019 |  | 59,946,387 |  |  |  |  |  |
Balance, Ending at Mar. 31, 2019 | (289,671) |  | (528,305) | 23,026 | 7,567 | 213,319 | (284,393) | (5,278)
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | (334) |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Noncontrolling Interest | 428 |  |  |  |  |  |  |
Balance, Beginning (in shares) at Dec. 31, 2018 |  | 59,916,973 |  |  |  |  |  |
Balance, Beginning at Dec. 31, 2018 | (270,097) |  | (519,498) | 29,048 | 7,831 | 203,571 | (279,048) | 8,951
Net loss | (25,714) |  |  |  |  |  |  |
Currency translation adjustment, net | (19,280) |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 1,594 |  |  |  |  |  |  |
Redemption value adjustment | 1,928 |  |  |  |  |  |  |
Balance, Ending (in shares) at Sep. 30, 2019 |  | 60,166,475 |  |  |  |  |  |
Balance, Ending at Sep. 30, 2019 | (248,176) |  | (533,538) | 49,197 | 6,490 | 233,620 | (244,231) | (3,945)
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | (819) |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Noncontrolling Interest | 683 |  |  |  |  |  |  |
Noncontrolling Interest, Period Increase (Decrease) | (49,883) |  |  |  |  |  |  |
Balance, Beginning (in shares) at Mar. 31, 2019 |  | 59,946,387 |  |  |  |  |  |
Balance, Beginning at Mar. 31, 2019 | (289,671) |  | (528,305) | 23,026 | 7,567 | 213,319 | (284,393) | (5,278)
Net loss |  |  |  | (6,424) |  |  | (6,424) |
Currency translation adjustment, net |  |  |  |  |  | 4,785 | 4,785 | 317
Temporary Equity, Foreign Currency Translation Adjustments | 5,102 |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 538 |  |  |  |  | (538) | 538 |
Dividends declared | (301) |  |  | 301 |  |  | (301) |
Redemption value adjustment | 661 |  | 661 |  |  |  | (661) |
Stock-based compensation | 286 |  | 286 |  |  |  | 286 |
VIE distributions | 450 |  |  |  |  |  |  | (450)
Issuance of stock under 401(k) plan |  | 53,983 |  |  |  |  |  |
Issuance of stock under 401(k) plan | (318) |  | 167 |  | (485) |  | (318) |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | (6,412) |  |  |  |  |  |  | 12
Balance, Ending (in shares) at Jun. 30, 2019 |  | 60,000,370 |  |  |  |  |  |
Balance, Ending at Jun. 30, 2019 | (288,091) |  | (527,763) | 29,751 | 7,082 | 207,996 | (282,934) | (5,157)
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | (265) |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Noncontrolling Interest | 321 |  |  |  |  |  |  |
Net loss | (20,044) |  |  | (19,144) |  |  | (19,144) |
Currency translation adjustment, net | (20,324) |  |  |  |  | (20,011) | (20,011) | (247)
Temporary Equity, Foreign Currency Translation Adjustments | (20,258) |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 590 |  |  |  |  | (590) | 590 |
Dividends declared | (302) |  |  | 302 |  |  | (302) |
Redemption value adjustment | 491 |  | 491 |  |  |  | (491) |
Stock Issued During Period, Shares, Restricted Stock Award, Gross |  | 100,118 |  |  |  |  |  |
Stock-based compensation | 347 |  | 347 |  |  |  | 347 |
VIE distributions | 285 |  |  |  |  |  | 0 | (285)
Issuance of stock under 401(k) plan |  | 65,987 |  |  |  |  |  |
Issuance of stock under 401(k) plan | (308) |  | 284 |  | (592) |  | (308) |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | (19,824) |  |  |  |  |  |  | (680)
Balance, Ending (in shares) at Sep. 30, 2019 |  | 60,166,475 |  |  |  |  |  |
Balance, Ending at Sep. 30, 2019 | (248,176) |  | (533,538) | 49,197 | 6,490 | 233,620 | (244,231) | (3,945)
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | (220) |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Noncontrolling Interest | (66) |  |  |  |  |  |  |
Noncontrolling Interest, Period Increase (Decrease) | 0 |  | 6,203 |  |  | (6,203) | 0 | 0
Balance, Beginning (in shares) at Dec. 31, 2019 |  | 60,283,212 |  |  |  |  |  |
Balance, Beginning at Dec. 31, 2019 | (238,988) |  | (532,070) | 74,334 | 4,234 | 218,651 | (234,851) | (4,137)
Net loss |  |  |  | (25,486) |  |  | (25,486) |
Currency translation adjustment, net |  |  |  |  |  | (32,004) | (32,004) | (1,782)
Temporary Equity, Foreign Currency Translation Adjustments | (33,786) |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 1,308 |  |  |  |  | 1,308 | 1,308 |
Dividends declared | (302) |  |  | (302) |  |  | (302) |
Stock Issued During Period, Shares, Restricted Stock Award, Gross |  | 2,500 |  |  |  |  |  |
Stock-based compensation | 490 |  | 468 |  | 22 |  | 490 |
Noncontrolling Interest, Decrease from Deconsolidation | 559 |  |  |  |  |  | 0 | 559
Issuance of stock under 401(k) plan |  | 76,280 |  |  |  |  |  |
Issuance of stock under 401(k) plan | (282) |  | (282) |  |  |  | (282) |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | (27,499) |  |  |  |  |  |  | (2,013)
Balance, Ending (in shares) at Mar. 31, 2020 |  | 60,361,992 |  |  |  |  |  |
Balance, Ending at Mar. 31, 2020 | (178,922) |  | (532,820) | 100,122 | 4,212 | 249,347 | (179,139) | 217
Balance, Beginning (in shares) at Dec. 31, 2019 |  | 60,283,212 |  |  |  |  |  |
Balance, Beginning at Dec. 31, 2019 | (238,988) |  | (532,070) | 74,334 | 4,234 | 218,651 | (234,851) | (4,137)
Net loss | (45,596) |  |  |  |  |  |  |
Currency translation adjustment, net | (28,498) |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 1,923 |  |  |  |  |  |  |
Redemption value adjustment | 0 |  |  |  |  |  |  |
Balance, Ending (in shares) at Sep. 30, 2020 |  | 61,263,978 |  |  |  |  |  |
Balance, Ending at Sep. 30, 2020 | (169,210) |  | (531,895) | 117,810 | 1,199 | 243,048 | (169,838) | 628
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | 0 |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Noncontrolling Interest | 0 |  |  |  |  |  |  |
Noncontrolling Interest, Period Increase (Decrease) | 0 |  |  |  |  |  |  |
Balance, Beginning (in shares) at Mar. 31, 2020 |  | 60,361,992 |  |  |  |  |  |
Balance, Beginning at Mar. 31, 2020 | (178,922) |  | (532,820) | 100,122 | 4,212 | 249,347 | (179,139) | 217
Net loss |  |  |  | (5,045) |  |  | (5,045) |
Currency translation adjustment, net |  |  |  |  |  | 523 | 523 | 491
Temporary Equity, Foreign Currency Translation Adjustments | 1,014 |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 40 |  |  |  |  | 40 | 40 |
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax | (198) |  |  |  |  | (198) | (198) |
Stock Issued During Period, Shares, Restricted Stock Award, Gross |  | 2,500 |  |  |  |  |  |
Stock-based compensation | 581 |  | 559 |  | 22 |  | 581 |
VIE distributions | 608 |  |  |  |  |  |  | 608
Issuance of stock under 401(k) plan |  | 237,802 |  |  |  |  |  |
Issuance of stock under 401(k) plan | (333) |  | 1,802 |  | (2,135) |  | (333) |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | (4,643) |  |  |  |  |  |  | 402
Balance, Ending (in shares) at Jun. 30, 2020 |  | 60,602,294 |  |  |  |  |  |
Balance, Ending at Jun. 30, 2020 | (176,657) |  | (531,577) | 105,167 | 2,055 | 248,982 | (175,373) | (1,284)
Net loss | (13,454) |  |  | (12,643) |  |  | (12,643) |
Currency translation adjustment, net | 4,275 |  |  |  |  |  | 5,376 | (1,101)
Temporary Equity, Foreign Currency Translation Adjustments | 4,275 |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 575 |  |  |  |  | 575 | 575 |
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax | (17) |  |  |  |  | (17) | (17) |
Redemption value adjustment | 0 |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross |  | 435,558 |  |  |  |  |  |
Stock-based compensation | 864 |  | 8 |  | 856 |  | 864 |
Issuance of stock under 401(k) plan |  | 226,126 |  |  |  |  |  |
Issuance of stock under 401(k) plan | (310) |  | (310) |  |  |  | (310) |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | (13,454) |  |  |  |  |  |  | (811)
Balance, Ending (in shares) at Sep. 30, 2020 |  | 61,263,978 |  |  |  |  |  |
Balance, Ending at Sep. 30, 2020 | $ (169,210) |  | $ (531,895) | $ 117,810 | $ 1,199 | $ 243,048 | $ (169,838) | $ 628

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