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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2015
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, 2015, 2014 and 2013, were as follows:
(In thousands) |  | 2015 |  |  | 2014 |  |  | 2013 |
Taxes on Income |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  |  |  |
Current |  | $ | 7,697 |  |  | $ | 3,362 |  |  | $ | 9,744 |
Deferred |  |  | 3,890 |  |  |  | 4,338 |  |  |  | (285 | )
State |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 1,559 |  |  |  | 782 |  |  |  | 1,223 |
Deferred |  |  | (225 | ) |  |  | 643 |  |  |  | (680 | )
Foreign |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 14,562 |  |  |  | 9,004 |  |  |  | 12,067 |
Deferred |  |  | (664 | ) |  |  | 325 |  |  |  | 1,224 |
Total |  | $ | 26,819 |  |  | $ | 18,454 |  |  | $ | 23,293 |
Income before Taxes |  |  |  |  |  |  |  |  |  |  |  |
Domestic |  | $ | 48,721 |  |  | $ | 34,091 |  |  | $ | 50,626 |
Foreign |  |  | 54,135 |  |  |  | 41,444 |  |  |  | 45,004 |
Total |  | $ | 102,856 |  |  | $ | 75,535 |  |  | $ | 95,630 |
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) |  | 2015 Amount |  |  | % |  |  | 2014 Amount |  |  | % |  |  | 2013 Amount |  |  | % |
Federal income tax provision at statutory tax rate |  | $ | 36,000 |  |  |  | 35.0 |  |  | $ | 26,437 |  |  |  | 35.0 |  |  | $ | 33,471 |  |  |  | 35.0 |
State tax provision on income less applicable federal tax benefit |  |  | 867 |  |  |  | 0.8 |  |  |  | 926 |  |  |  | 1.2 |  |  |  | 353 |  |  |  | 0.4 |
Foreign income taxed at different rates(a) |  |  | (5,060 | ) |  |  | (4.9 | ) |  |  | (5,416 | ) |  |  | (7.2 | ) |  |  | (2,474 | ) |  |  | (2.6 | )
Unrecognized tax benefits(a) |  |  | 1,536 |  |  |  | 1.5 |  |  |  | 241 |  |  |  | 0.3 |  |  |  | (53 | ) |  |  | (0.1 | )
Domestic production activities deduction |  |  | (884 | ) |  |  | (0.9 | ) |  |  | (312 | ) |  |  | (0.4 | ) |  |  | (991 | ) |  |  | (1.0 | )
Nontaxable foreign interest income |  |  | (2,106 | ) |  |  | (2.0 | ) |  |  | (2,435 | ) |  |  | (3.2 | ) |  |  | (2,614 | ) |  |  | (2.7 | )
Nontaxable biodiesel excise credit income |  |  | — |  |  |  | — |  |  |  | (130 | ) |  |  | (0.2 | ) |  |  | (2,347 | ) |  |  | (2.5 | )
U.S. tax credits |  |  | (3,465 | ) |  |  | (3.4 | ) |  |  | (1,086 | ) |  |  | (1.4 | ) |  |  | (2,209 | ) |  |  | (2.3 | )
Non-deductible expenses and other items, net(a) |  |  | (69 | ) |  |  | 0.0 |  |  |  | 229 |  |  |  | 0.3 |  |  |  | 157 |  |  |  | 0.2 |
Total income tax provision |  | $ | 26,819 |  |  |  | 26.1 |  |  | $ | 18,454 |  |  |  | 24.4 |  |  | $ | 23,293 |  |  |  | 24.4 |
| (a) | Certain 2014 and 2013 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, 2015 and 2014, the tax effects of significant temporary differences representing deferred tax assets and liabilities were as follows. Note that in the fourth quarter of 2015, the Company early-adopted ASU No. 2015-17, Income Taxes (Topic 740), Balance Sheet Classification of Deferred Taxes. The Company adopted the new guidance on a prospective basis, and as a result, the classifications of prior year amounts were not changed from those previously reported:
(In thousands) |  | 2015 |  |  | 2014 |
Deferred Tax Liabilities: |  |  |  |  |  |  |  |
Depreciation |  | $ | (69,975 | ) |  | $ | (63,104 | )
Unrealized foreign exchange loss |  |  | (614 | ) |  |  | (838 | )
Other |  |  | (950 | ) |  |  | (1,159 | )
|  | $ | (71,539 | ) |  | $ | (65,101 | )
Deferred Tax Assets: |  |  |  |  |  |  |  |
Pensions |  | $ | 16,698 |  |  | $ | 18,775 |
Deferred revenue |  |  | 1,377 |  |  |  | 1,650 |
Other accruals and reserves |  |  | 17,171 |  |  |  | 13,230 |
Inventories |  |  | 1,833 |  |  |  | 1,957 |
Legal and environmental accruals |  |  | 9,303 |  |  |  | 9,505 |
Deferred compensation |  |  | 17,828 |  |  |  | 15,636 |
Bad debt and rebate reserves |  |  | 3,685 |  |  |  | 4,618 |
Subsidiaries net operating loss carryforwards |  |  | 602 |  |  |  | 727 |
Tax credit carryforwards |  |  | 1,120 |  |  |  | 2,064 |
|  | $ | 69,617 |  |  | $ | 68,162 |
Valuation Allowance |  | $ | (1,443 | ) |  | $ | (1,506 | )
Net Deferred Tax (Liabilities) Assets |  | $ | (3,365 | ) |  | $ | 1,555 |
Reconciliation to Consolidated Balance Sheet: |  |  |  |  |  |  |  |
Current deferred tax assets |  | $ | — |  |  | $ | 15,364 |
Non-current deferred tax assets (in other non-current assets) |  |  | 6,090 |  |  |  | 2,044 |
Current deferred tax liabilities (in accrued liabilities) |  |  | — |  |  |  | (49 | )
Non-current deferred tax liabilities |  |  | (9,455 | ) |  |  | (15,804 | )
Net Deferred Tax (Liabilities) Assets |  | $ | (3,365 | ) |  | $ | 1,555 |
Schedule of Reconciliations of Unrecognized Tax Benefits | Below are reconciliations of the January 1 and December 31 balances of unrecognized tax benefits for 2015, 2014 and 2013:
(In thousands) |  | 2015 |  |  | 2014 |  |  | 2013 |
Unrecognized tax benefits, opening balance |  | $ | 464 |  |  | $ | 240 |  |  | $ | 289 |
Gross increases – tax positions in prior period |  |  | 1,526 |  |  |  | — |  |  |  | 27 |
Gross decreases – tax positions in prior period |  |  | — |  |  |  | — |  |  |  | (41 | )
Gross increases – current period tax positions |  |  | 29 |  |  |  | 261 |  |  |  | 17 |
Foreign currency translation |  |  | (37 | ) |  |  | (13 | ) |  |  | 5 |
Lapse of statute of limitations |  |  | (24 | ) |  |  | (24 | ) |  |  | (57 | )
Unrecognized tax benefits, ending balance |  | $ | 1,958 |  |  | $ | 464 |  |  | $ | 240 |

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