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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) | The Company's income (loss) before income taxes and income tax expense (benefit), each by tax jurisdiction, consists of the following (dollars in thousands):
|  | Year ended December 31,
|  | 2018 |  | 2017 |  | 2016
Income (loss) before income taxes: |  |  |  |  |  |
Domestic |  | $ | 75,830 |  |  | $ | 50,760 |  |  | $ | (69,850 | )
Foreign |  | 30,150 |  |  | 15,450 |  |  | 11,620 |
Total income (loss) before income taxes |  | $ | 105,980 |  |  | $ | 66,210 |  |  | $ | (58,230 | )
Current income tax expense: |  |  |  |  |  |
Federal |  | $ | 6,770 |  |  | $ | 12,800 |  |  | $ | 7,560 |
State and local |  | 2,440 |  |  | 1,770 |  |  | 1,920 |
Foreign |  | 7,070 |  |  | 5,420 |  |  | 4,250 |
Total current income tax expense |  | 16,280 |  |  | 19,990 |  |  | 13,730 |
Deferred income tax expense (benefit): |  |  |  |  |  |
Federal |  | 4,540 |  |  | 15,180 |  |  | (28,180 | )
State and local |  | 1,310 |  |  | 1,280 |  |  | (2,550 | )
Foreign |  | 550 |  |  | (1,200 | ) |  | (1,430 | )
Total deferred income tax expense (benefit) |  | 6,400 |  |  | 15,260 |  |  | (32,160 | )
Income tax expense (benefit) |  | $ | 22,680 |  |  | $ | 35,250 |  |  | $ | (18,430 | )
Schedule of Deferred Tax Assets and Liabilities | The components of deferred taxes are as follows (dollars in thousands):
|  | December 31, 2018 |  | December 31, 2017
Deferred tax assets: |  |  |  |
Accounts receivable |  | $ | 310 |  |  | $ | 1,000 |
Inventories |  | 1,900 |  |  | 5,230 |
Accrued liabilities and other long-term liabilities |  | 7,220 |  |  | 20,350 |
Tax loss and credit carryforwards |  | 6,990 |  |  | 7,290 |
Gross deferred tax asset |  | 16,420 |  |  | 33,870 |
Valuation allowances |  | (5,520 | ) |  | (6,400 | )
Net deferred tax asset |  | 10,900 |  |  | 27,470 |
Deferred tax liabilities: |  |  |  |
Property and equipment |  | (8,770 | ) |  | (16,380 | )
Goodwill and other intangible assets |  | (4,940 | ) |  | (5,350 | )
Investment in foreign affiliates, including withholding tax |  | (1,050 | ) |  | (740 | )
Other, principally deferred income |  | (620 | ) |  | (1,550 | )
Gross deferred tax liability |  | (15,380 | ) |  | (24,020 | )
Net deferred tax asset (liability) |  | $ | (4,480 | ) |  | $ | 3,450 |
Schedule of Effective Income Tax Rate Reconciliation | The following is a reconciliation of income tax expense (benefit) computed at the U.S. federal statutory rate to income tax expense (benefit) allocated to income (loss) before income taxes (dollars in thousands):
|  | Year ended December 31,
|  | 2018 |  | 2017 |  | 2016
U.S. federal statutory rate |  | 21 | % |  | 35 | % |  | 35 | %
Tax at U.S. federal statutory rate |  | $ | 22,250 |  |  | $ | 23,170 |  |  | $ | (20,380 | )
State and local taxes, net of federal tax benefit |  | 3,030 |  |  | 2,250 |  |  | (550 | )
Differences in statutory foreign tax rates |  | 380 |  |  | (2,580 | ) |  | (1,930 | )
Change in recognized tax benefits |  | (270 | ) |  | (480 | ) |  | (1,410 | )
Goodwill and other intangible assets impairment |  | — |  |  | — |  |  | 5,050 |
Nontaxable income |  | (940 | ) |  | (1,050 | ) |  | (310 | )
Research and manufacturing incentives |  | (1,740 | ) |  | (1,510 | ) |  | (830 | )
Net change in valuation allowance |  | 650 |  |  | 520 |  |  | 2,140 |
Tax Reform Act |  | (400 | ) |  | 12,660 |  |  | — |
Other, net |  | (280 | ) |  | 2,270 |  |  | (210 | )
Income tax expense (benefit) |  | $ | 22,680 |  |  | $ | 35,250 |  |  | $ | (18,430 | )
Schedule of Unrecognized Tax Benefits Roll Forward | A reconciliation of the change in the UTBs and related accrued interest and penalties for the years ended December 31, 2018 and 2017 is as follows (dollars in thousands):
|  | Unrecognized Tax Benefits
Balance at December 31, 2016 |  | $ | 3,570 |
Tax positions related to current year: |  |
Additions |  | 250 |
Tax positions related to prior years: |  |
Additions |  | 860 |
Reductions |  | (100 | )
Settlements |  | — |
Lapses in the statutes of limitations |  | (1,210 | )
Balance at December 31, 2017 |  | $ | 3,370 |
Tax positions related to current year: |  |
Additions |  | 60 |
Tax positions related to prior years: |  |  |
Additions |  | 390 |
Reductions |  | — |
Settlements |  | — |
Lapses in the statutes of limitations |  | (800 | )
Balance at December 31, 2018 |  | $ | 3,020 |

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