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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Provision for Taxes on Income and Other Related Income Before Taxes | The provisions for taxes on income and the related income before taxes for the years ended December 31, 2018, 2017 and 2016, were as follows:
(In thousands) |  | 2018 |  |  | 2017 |  |  | 2016 |
Taxes on Income |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  |  |  |
Current |  | $ | (296 | ) |  | $ | 32,299 |  |  | $ | 18,811 |
Deferred |  |  | 9,314 |  |  |  | (1,744 | ) |  |  | (3,192 | )
State |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 2,095 |  |  |  | 1,764 |  |  |  | 2,273 |
Deferred |  |  | 1,892 |  |  |  | 192 |  |  |  | (1,171 | )
Foreign |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 14,510 |  |  |  | 13,077 |  |  |  | 14,960 |
Deferred |  |  | (342 | ) |  |  | 2,102 |  |  |  | (4,063 | )
Total |  | $ | 27,173 |  |  | $ | 47,690 |  |  | $ | 27,618 |
Income before Taxes |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  | $ | 88,522 |  |  | $ | 72,662 |  |  | $ | 64,675 |
Foreign |  |  | 51,401 |  |  |  | 66,575 |  |  |  | 49,141 |
Total |  | $ | 139,923 |  |  | $ | 139,237 |  |  | $ | 113,816 |
Summary of Variations Between the Effective and Statutory U.S. Federal Income Tax Rates | The variations between the effective and statutory U.S. federal income tax rates are summarized as follows:
(In thousands) |  | 2018 Amount |  |  | % |  |  | 2017 Amount |  |  | % |  |  | 2016 Amount |  |  | % |
Federal income tax provision at statutory tax rate |  | $ | 29,384 |  |  |  | 21.0 |  |  | $ | 48,733 |  |  |  | 35.0 |  |  | $ | 39,836 |  |  |  | 35.0 |
State income tax provision, less applicable federal tax benefit |  |  | 3,150 |  |  |  | 2.3 |  |  |  | 1,271 |  |  |  | 0.9 |  |  |  | 716 |  |  |  | 0.6 |
Foreign income taxed at different rates |  |  | 864 |  |  |  | 0.6 |  |  |  | (8,075 | ) |  |  | (5.8 | ) |  |  | (6,325 | ) |  |  | (5.6 | )
U.S. taxation of foreign earnings(a) |  |  | 2,348 |  |  |  | 1.7 |  |  |  | (1,054 | ) |  |  | (0.8 | ) |  |  | 14 |  |  |  | — |
Unrecognized tax benefits |  |  | (460 | ) |  |  | (0.3 | ) |  |  | (47 | ) |  |  | — |  |  |  | 23 |  |  |  | — |
Domestic production activities deduction |  |  | — |  |  |  | — |  |  |  | (1,339 | ) |  |  | (1.0 | ) |  |  | (1,633 | ) |  |  | (1.4 | )
Nontaxable foreign interest income |  |  | (1,179 | ) |  |  | (0.8 | ) |  |  | (2,073 | ) |  |  | (1.5 | ) |  |  | (2,030 | ) |  |  | (1.8 | )
U.S. tax reform, net impact(b) |  |  | (375 | ) |  |  | (0.3 | ) |  |  | 14,807 |  |  |  | 10.7 |  |  |  | — |  |  |  | — |
Change in accounting methods(c) |  |  | (3,383 | ) |  |  | (2.4 | ) |  |  | (893 | ) |  |  | (0.6 | ) |  |  | — |  |  |  | — |
Stock based compensation, excess tax benefits(d) |  |  | (1,648 | ) |  |  | (1.2 | ) |  |  | (2,254 | ) |  |  | (1.6 | ) |  |  | (1,878 | ) |  |  | (1.7 | )
U.S. tax credits |  |  | (1,324 | ) |  |  | (0.9 | ) |  |  | (1,204 | ) |  |  | (0.9 | ) |  |  | (1,100 | ) |  |  | (1.0 | )
Non-deductible expenses and other items, net(e) |  |  | (204 | ) |  |  | (0.3 | ) |  |  | (182 | ) |  |  | (0.1 | ) |  |  | (5 | ) |  |  | 0.2 |
Total income tax provision |  | $ | 27,173 |  |  |  | 19.4 |  |  | $ | 47,690 |  |  |  | 34.3 |  |  | $ | 27,618 |  |  |  | 24.3 |
(a) | Includes cost of global intangible low-taxed income (GILTI) in 2018 and withholding taxes paid on cash repatriated from foreign countries.
(b) | Does not include state tax impacts, which are included in state income tax provision, less applicable federal tax benefit.
(c) | For 2018, amount represents the federal tax rate change due to certain accounting methods that were adopted on the 2017 federal income tax return. For 2017, amount represents an accounting method change for depreciation.
(d) | Excess tax benefits related to employee share-based payment transactions recognized in 2018, 2017 and 2016 resulting from the adoption of ASU No. 2016-9.
(e) | Certain 2016 amounts have been reclassified to conform to the 2017 and 2018 presentation.
Schedule Showing Tax Effects of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities | At December 31, 2018 and 2017, the tax effects of significant temporary differences representing deferred tax assets and liabilities were as follows:
(In thousands) |  | 2018 |  |  | 2017 |
Deferred Tax Liabilities: |  |  |  |  |  |  |  |
Depreciation |  | $ | (57,665 | ) |  | $ | (51,244 | )
Unrealized foreign exchange loss |  |  | (980 | ) |  |  | (734 | )
Amortization of intangibles |  |  | (1,016 | ) |  |  | (1,420 | )
Inventories |  |  | (725 | ) |  |  | — |
Other |  |  | (301 | ) |  |  | (646 | )
|  | $ | (60,687 | ) |  | $ | (54,044 | )
Deferred Tax Assets: |  |  |  |  |  |  |  |
Pensions |  | $ | 7,971 |  |  | $ | 7,884 |
Deferred revenue |  |  | 208 |  |  |  | 232 |
Other accruals and reserves |  |  | 13,123 |  |  |  | 13,660 |
Inventories |  |  | — |  |  |  | 1,182 |
Legal and environmental accruals |  |  | 7,143 |  |  |  | 7,243 |
Deferred compensation |  |  | 14,214 |  |  |  | 15,402 |
Bad debt and rebate reserves |  |  | 2,916 |  |  |  | 2,865 |
Non-U.S. subsidiaries net operating loss carryforwards |  |  | 3,869 |  |  |  | 2,657 |
Tax credit carryforwards |  |  | 2,141 |  |  |  | 1,851 |
|  | $ | 51,585 |  |  | $ | 52,976 |
Valuation Allowance |  | $ | (3,701 | ) |  | $ | (2,255 | )
Net Deferred Tax Liabilities |  | $ | (12,803 | ) |  | $ | (3,323 | )
Reconciliation to Consolidated Balance Sheet: |  |  |  |  |  |  |  |
Non-current deferred tax assets (in other non-current assets) |  |  | 5,869 |  |  |  | 7,639 |
Non-current deferred tax liabilities |  |  | (18,672 | ) |  |  | (10,962 | )
Net Deferred Tax (Liabilities) Assets |  | $ | (12,803 | ) |  | $ | (3,323 | )
Schedule of Reconciliations of Unrecognized Tax Benefits | Below are reconciliations of the January 1 and December 31 balances of unrecognized tax benefits for 2018, 2017 and 2016:
(In thousands) |  | 2018 |  |  | 2017 |  |  | 2016 |
Unrecognized tax benefits, opening balance |  | $ | 1,927 |  |  | $ | 1,931 |  |  | $ | 1,958 |
Gross increases – tax positions in prior period |  |  | 29 |  |  |  | — |  |  |  | — |
Gross increases – current period tax positions |  |  | 26 |  |  |  | 20 |  |  |  | 35 |
Foreign currency translation |  |  | 1 |  |  |  | 69 |  |  |  | (43 | )
Settlement |  |  | (1,526 | ) |  |  | — |  |  |  | — |
Lapse of statute of limitations |  |  | (289 | ) |  |  | (93 | ) |  |  | (19 | )
Unrecognized tax benefits, ending balance |  | $ | 168 |  |  | $ | 1,927 |  |  | $ | 1,931 |

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