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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Summary of Income from Continuing Operations before Income Taxes | Income from continuing operations before income taxes consisted of the following:
|  | Year Ended December 31, |
(in thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Foreign |  | $ | 82,919 |  |  | $ | 33,611 |  |  | $ | 35,571 |
United States |  |  | 21,431 |  |  |  | 31,118 |  |  |  | 2,364 |
Income from continuing operations before income taxes |  | $ | 104,350 |  |  | $ | 64,729 |  |  | $ | 37,935 |
Summary of Significant Components of the Income Tax Provision From Continuing Operations | Significant components of the income tax provision from continuing operations are as follows:
|  | Year Ended December 31, |
(in thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
United States: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 1,693 |  |  | $ | 3,685 |  |  | $ | (876 | )
State |  |  | 2,573 |  |  |  | 1,716 |  |  |  | 1,558 |
Foreign |  |  | 15,583 |  |  |  | 8,177 |  |  |  | 9,342 |
Total current |  |  | 19,849 |  |  |  | 13,578 |  |  |  | 10,024 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
United States: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | 19,893 |  |  |  | 8,427 |  |  |  | 1,854 |
State |  |  | 1,761 |  |  |  | (598 | ) |  |  | (164 | )
Foreign |  |  | 4,395 |  |  |  | (157 | ) |  |  | (1,221 | )
Total deferred |  |  | 26,049 |  |  |  | 7,672 |  |  |  | 469 |
Income tax expense |  | $ | 45,898 |  |  | $ | 21,250 |  |  | $ | 10,493 |
Reconciliation of Income Tax Expense |
|  | Year Ended December 31, |
(in thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Computed income tax expense at statutory federal income tax rate of 35% |  | $ | 36,522 |  |  |  | 35.0 | % |  | $ | 22,655 |  |  |  | 35.0 | % |  | $ | 13,277 |  |  |  | 35.0 | %
State income taxes, net of federal benefit |  |  | 1,160 |  |  |  | 1.1 | % |  |  | 292 |  |  |  | 0.5 | % |  |  | 1,713 |  |  |  | 4.5 | %
Deemed mandatory repatriation state tax |  |  | 1,206 |  |  |  | 1.2 | % |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Deemed mandatory repatriation federal tax, net of foreign tax credit |  |  | 6,936 |  |  |  | 6.6 | % |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Remeasurement of deferred taxes due to reduction in U.S. tax rate * |  |  | 8,000 |  |  |  | 7.7 | % |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Foreign tax rate differential |  |  | (5,031 | ) |  |  | (4.8 | )% |  |  | (882 | ) |  |  | (1.4 | )% |  |  | (1,181 | ) |  |  | (3.1 | )%
U.S. tax on current year foreign earnings, net of foreign tax credits |  |  | (2,726 | ) |  |  | (2.6 | )% |  |  | (373 | ) |  |  | (0.6 | )% |  |  | (948 | ) |  |  | (2.5 | )%
Change in valuation allowance |  |  | (796 | ) |  |  | (0.8 | )% |  |  | 1,230 |  |  |  | 1.9 | % |  |  | (944 | ) |  |  | (2.5 | )%
Other adjustments, net |  |  | 627 |  |  |  | 0.6 | % |  |  | (1,672 | ) |  |  | (2.6 | )% |  |  | (1,424 | ) |  |  | (3.7 | )%
Income tax expense |  | $ | 45,898 |  |  |  | 44.0 | % |  | $ | 21,250 |  |  |  | 32.8 | % |  | $ | 10,493 |  |  |  | 27.7 | %
* Includes $0.6 million increase to the valuation allowance related to the remeasurement of deferred taxes due to the reduction in U.S. tax rate.
Schedule of Deferred Tax Assets and Liabilities | The components of deferred income tax assets and liabilities included in the Consolidated Balance Sheets are as follows:
|  | December 31, |
(in thousands) |  | 2017 |  |  | 2016 |
Deferred tax assets: |  |  |  |  |  |  |  |
Tax credit carryforwards |  | $ | 6,654 |  |  | $ | 11,380 |
Pension, compensation, and other employee benefits |  |  | 15,173 |  |  |  | 22,868 |
Provisions for losses |  |  | 5,826 |  |  |  | 10,235 |
Net operating loss carryforward |  |  | 5,195 |  |  |  | 5,023 |
State income taxes |  |  | 2,502 |  |  |  | 3,790 |
Other deferred income tax assets |  |  | 2,796 |  |  |  | 5,020 |
Total deferred tax assets |  |  | 38,146 |  |  |  | 58,316 |
Valuation allowance |  |  | (4,010 | ) |  |  | (3,998 | )
Foreign deferred tax assets included above |  |  | (2,396 | ) |  |  | (1,972 | )
Net deferred tax assets |  |  | 31,740 |  |  |  | 52,346 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Property and equipment |  |  | (10,530 | ) |  |  | (3,299 | )
Deferred tax related to life insurance |  |  | (3,556 | ) |  |  | (5,642 | )
Goodwill and other intangible assets |  |  | (4,299 | ) |  |  | (4,535 | )
Other deferred income tax liabilities |  |  | (463 | ) |  |  | (557 | )
Total deferred tax liabilities |  |  | (18,848 | ) |  |  | (14,033 | )
Foreign deferred tax liabilities included above |  |  | 7,869 |  |  |  | 2,852 |
United States net deferred tax assets |  | $ | 20,761 |  |  | $ | 41,165 |
Schedule of Unrecognized Tax Benefits |
(in thousands) |  | Continuing Operations |  |  | Discontinued Operations |  |  | Total |
Balance at December 31, 2014 |  | $ | 1,283 |  |  | $ | 636 |  |  | $ | 1,919 |
Additions for tax positions taken in prior years |  |  | 43 |  |  |  | — |  |  |  | 43 |
Reductions for tax positions taken in prior years |  |  | (666 | ) |  |  | — |  |  |  | (666 | )
Reductions for lapse of applicable statutes |  |  | (353 | ) |  |  | — |  |  |  | (353 | )
Balance at December 31, 2015 |  |  | 307 |  |  |  | 636 |  |  |  | 943 |
Additions for tax positions taken in prior years |  |  | 1,295 |  |  |  | — |  |  |  | 1,295 |
Reductions for lapse of applicable statutes |  |  | (43 | ) |  |  | — |  |  |  | (43 | )
Balance at December 31, 2016 |  |  | 1,559 |  |  |  | 636 |  |  |  | 2,195 |
Additions for tax positions taken in prior years |  |  | 43 |  |  |  | — |  |  |  | 43 |
Reductions for lapse of applicable statutes |  |  | (177 | ) |  |  | (636 | ) |  |  | (813 | )
Balance at December 31, 2017 |  | $ | 1,425 |  |  | $ | — |  |  | $ | 1,425 |

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