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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
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, 2017, 2016 and 2015, were as follows:
(In thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Taxes on Income |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  |  |  |
Current |  | $ | 32,299 |  |  | $ | 18,811 |  |  | $ | 7,697 |
Deferred |  |  | (1,744 | ) |  |  | (3,192 | ) |  |  | 3,890 |
State |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 1,764 |  |  |  | 2,273 |  |  |  | 1,559 |
Deferred |  |  | 192 |  |  |  | (1,171 | ) |  |  | (225 | )
Foreign |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 13,077 |  |  |  | 14,960 |  |  |  | 14,562 |
Deferred |  |  | 2,102 |  |  |  | (4,063 | ) |  |  | (664 | )
Total |  | $ | 47,690 |  |  | $ | 27,618 |  |  | $ | 26,819 |
Income before Taxes |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  | $ | 72,662 |  |  | $ | 64,675 |  |  | $ | 48,721 |
Foreign |  |  | 66,575 |  |  |  | 49,141 |  |  |  | 54,135 |
Total |  | $ | 139,237 |  |  | $ | 113,816 |  |  | $ | 102,856 |
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) |  | 2017 Amount |  |  | % |  |  | 2016 Amount |  |  | % |  |  | 2015 Amount |  |  | % |
Federal income tax provision at statutory tax rate |  | $ | 48,733 |  |  |  | 35.0 |  |  | $ | 39,836 |  |  |  | 35.0 |  |  | $ | 36,000 |  |  |  | 35.0 |
State tax provision on income less applicable federal tax benefit |  |  | 1,271 |  |  |  | 0.9 |  |  |  | 716 |  |  |  | 0.6 |  |  |  | 867 |  |  |  | 0.8 |
Foreign income taxed at different rates |  |  | (8,075 | ) |  |  | (5.8 | ) |  |  | (6,325 | ) |  |  | (5.6 | ) |  |  | (5,060 | ) |  |  | (4.9 | )
Repatriation of foreign earnings |  |  | (1,054 | ) |  |  | (0.8 | ) |  |  | 14 |  |  |  | — |  |  |  | 21 |  |  |  | — |
Unrecognized tax benefits |  |  | (47 | ) |  |  | 0.0 |  |  |  | 23 |  |  |  | — |  |  |  | 1,536 |  |  |  | 1.5 |
Domestic production activities deduction |  |  | (1,339 | ) |  |  | (1.0 | ) |  |  | (1,633 | ) |  |  | (1.4 | ) |  |  | (884 | ) |  |  | (0.9 | )
Nontaxable foreign interest income |  |  | (2,073 | ) |  |  | (1.5 | ) |  |  | (2,030 | ) |  |  | (1.8 | ) |  |  | (2,106 | ) |  |  | (2.0 | )
U.S. tax reform, net impact (a) |  |  | 14,807 |  |  |  | 10.7 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Change in accounting method for depreciation |  |  | (893 | ) |  |  | (0.6 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Stock based compensation, excess tax benefits(b) |  |  | (2,254 | ) |  |  | (1.6 | ) |  |  | (1,878 | ) |  |  | (1.7 | ) |  |  | — |  |  |  | — |
U.S. tax credits |  |  | (1,204 | ) |  |  | (0.9 | ) |  |  | (1,100 | ) |  |  | (1.0 | ) |  |  | (3,465 | ) |  |  | (3.4 | )
Non-deductible expenses and other items, net (c) |  |  | (182 | ) |  |  | (0.1 | ) |  |  | (5 | ) |  |  | 0.2 |  |  |  | (90 | ) |  |  | — |
Total income tax provision |  | $ | 47,690 |  |  |  | 34.3 |  |  | $ | 27,618 |  |  |  | 24.3 |  |  | $ | 26,819 |  |  |  | 26.1 |
(a) | Does not include state tax impacts, which are included in state tax provision on income less applicable federal tax benefit.
(b) | Excess tax benefits related to employee share-based payment transactions recognized in 2017 and 2016 resulting from the adoption of ASU No. 2016-9. There is no effect for 2015 because the recognition of excess tax benefits in the tax provision is to be done only on a prospective basis, beginning with the year of adopting the new guidance, which was 2016.
(c) | Certain 2016 and 2015 amounts have been reclassified to conform to the current year presentation.
Schedule Showing Tax Effects of Significant Temporary Differences Representing Deferred Tax Assets and Liabilities | At December 31, 2017 and 2016, the tax effects of significant temporary differences representing deferred tax assets and liabilities were as follows:
(In thousands) |  | 2017 |  |  | 2016 |
Deferred Tax Liabilities: |  |  |  |  |  |  |  |
Depreciation |  | $ | (51,244 | ) |  | $ | (75,973 | )
Unrealized foreign exchange loss |  |  | (734 | ) |  |  | (631 | )
Other |  |  | (2,066 | ) |  |  | (2,756 | )
|  | $ | (54,044 | ) |  | $ | (79,360 | )
Deferred Tax Assets: |  |  |  |  |  |  |  |
Pensions |  | $ | 7,884 |  |  | $ | 12,077 |
Deferred revenue |  |  | 232 |  |  |  | 940 |
Other accruals and reserves |  |  | 13,660 |  |  |  | 20,590 |
Inventories |  |  | 1,182 |  |  |  | 1,815 |
Legal and environmental accruals |  |  | 7,243 |  |  |  | 11,503 |
Deferred compensation |  |  | 15,402 |  |  |  | 24,485 |
Bad debt and rebate reserves |  |  | 2,865 |  |  |  | 4,195 |
Non-U.S. subsidiaries net operating loss carryforwards |  |  | 2,657 |  |  |  | 1,201 |
Tax credit carryforwards |  |  | 1,851 |  |  |  | 1,599 |
|  | $ | 52,976 |  |  | $ | 78,405 |
Valuation Allowance |  | $ | (2,255 | ) |  | $ | (1,815 | )
Net Deferred Tax Liabilities |  | $ | (3,323 | ) |  | $ | (2,770 | )
Reconciliation to Consolidated Balance Sheet: |  |  |  |  |  |  |  |
Non-current deferred tax assets (in other non-current assets) |  |  | 7,639 |  |  |  | 9,727 |
Non-current deferred tax liabilities |  |  | (10,962 | ) |  |  | (12,497 | )
Net Deferred Tax (Liabilities) Assets |  | $ | (3,323 | ) |  | $ | (2,770 | )
Schedule of Reconciliations of Unrecognized Tax Benefits | Below are reconciliations of the January 1 and December 31 balances of unrecognized tax benefits for 2017, 2016 and 2015:
(In thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Unrecognized tax benefits, opening balance |  | $ | 1,931 |  |  | $ | 1,958 |  |  | $ | 464 |
Gross increases – tax positions in prior period |  |  | — |  |  |  | — |  |  |  | 1,526 |
Gross increases – current period tax positions |  |  | 20 |  |  |  | 35 |  |  |  | 29 |
Foreign currency translation |  |  | 69 |  |  |  | (43 | ) |  |  | (37 | )
Lapse of statute of limitations |  |  | (93 | ) |  |  | (19 | ) |  |  | (24 | )
Unrecognized tax benefits, ending balance |  | $ | 1,927 |  |  | $ | 1,931 |  |  | $ | 1,958 |

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