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Note 8 - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | 2019 |  |  | 2018 |  |  | 2017 |
United States |  | $ | 41,234 |  |  | $ | 45,271 |  |  | $ | 33,277 |
Foreign countries |  |  | 3,932 |  |  |  | 5,045 |  |  |  | 6,101 |
Total |  | $ | 45,166 |  |  | $ | 50,316 |  |  | $ | 39,378 |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Current expense: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 8,204 |  |  | $ | 7,779 |  |  | $ | 16,489 |
Foreign |  |  | 1,140 |  |  |  | 1,179 |  |  |  | 1,243 |
State and local |  |  | 1,205 |  |  |  | 1,042 |  |  |  | 1,231 |
|  |  | 10,549 |  |  |  | 10,000 |  |  |  | 18,963 |
Deferred expense (benefit): |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (720 | ) |  |  | 405 |  |  |  | (5,968 | )
Foreign |  |  | (379 | ) |  |  | (125 | ) |  |  | 51 |
State and local |  |  | (99 | ) |  |  | 57 |  |  |  | (223 | )
|  |  | (1,198 | ) |  |  | 337 |  |  |  | (6,140 | )
Income tax expense |  | $ | 9,351 |  |  | $ | 10,337 |  |  | $ | 12,823 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | 201 9 |  |  | 201 8 |  |  | 201 7 |
Income taxes at statutory rate |  | $ | 9,485 |  |  | $ | 10,566 |  |  | $ | 13,782 |
State and local income taxes, net of federal tax benefit |  |  | 803 |  |  |  | 832 |  |  |  | 555 |
Tax credits |  |  | (898 | ) |  |  | (506 | ) |  |  | (295 | )
Domestic production activities deduction |  |  | - |  |  |  | - |  |  |  | (1,191 | )
Lower foreign taxes differential |  |  | (65 | ) |  |  | (5 | ) |  |  | (842 | )
Uncertain tax positions |  |  | 164 |  |  |  | 172 |  |  |  | 346 |
Valuation allowance |  |  | 71 |  |  |  | 37 |  |  |  | 100 |
Federal tax reform – deferred rate change |  |  | - |  |  |  | (581 | ) |  |  | (1,624 | )
Deemed mandatory repatriation |  |  | - |  |  |  | (48 | ) |  |  | 1,370 |
Foreign withholding tax |  |  | - |  |  |  | - |  |  |  | 600 |
Other |  |  | (209 | ) |  |  | (130 | ) |  |  | 22 |
Income tax expense |  | $ | 9,351 |  |  | $ | 10,337 |  |  | $ | 12,823 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | 2019 |  |  | 2018 |
Deferred tax assets: |  |  |  |  |  |  |  |
Inventories |  | $ | 1,391 |  |  | $ | 1,161 |
Accrued liabilities |  |  | 2,095 |  |  |  | 2,306 |
Postretirement health benefits obligation |  |  | 5,884 |  |  |  | 5,350 |
Pension |  |  | 240 |  |  |  | - |
Lease liabilities |  |  | 361 |  |  |  | - |
Other |  |  | 1,360 |  |  |  | 840 |
Total deferred tax assets |  |  | 11,331 |  |  |  | 9,657 |
Valuation allowance |  |  | (567 | ) |  |  | (496 | )
Net deferred tax assets |  |  | 10,764 |  |  |  | 9,161 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Depreciation and amortization |  |  | (9,446 | ) |  |  | (9,351 | )
Leases – right of use assets |  |  | (361 | ) |  |  | - |
Pension |  |  | - |  |  |  | (1,113 | )
Foreign withholding tax |  |  | (100 | ) |  |  | (600 | )
Total deferred tax liabilities |  |  | (9,907 | ) |  |  | (11,064 | )
Net deferred tax assets (liabilities) |  | $ | 857 |  |  | $ | (1,903 | )
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
|  | 201 9 |  |  | 201 8 |  |  | 201 7 |
Balance at beginning of year |  | $ | 951 |  |  | $ | 797 |  |  | $ | 492 |
Additions based on tax positions related to the current year |  |  | 372 |  |  |  | 268 |  |  |  | 239 |
Additions based on tax positions related to prior years |  |  | - |  |  |  | - |  |  |  | 165 |
Reductions due to lapse of applicable statute of limitations |  |  | (193 | ) |  |  | (114 | ) |  |  | (99 | )
Balance at end of year |  | $ | 1,130 |  |  | $ | 951 |  |  | $ | 797 |

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