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Note 6 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

		2017				2016				2015
United States		$	33,277			$	33,101			$	35,391
Foreign countries			6,101				3,381				1,875
Total		$	39,378			$	36,482			$	37,266

		2017				2016				2015
Current expense:
Federal		$	16,489			$	6,960			$	11,465
Foreign			1,243				547				292
State and local			1,231				581				963
			18,963				8,088				12,720
Deferred expense (benefit):
Federal			(5,968	)			3,429				(443	)
Foreign			51				(184	)			(112	)
State and local			(223	)			266				(8	)
			(6,140	)			3,511				(563	)
Income tax expense		$	12,823			$	11,599			$	12,157

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

		2017				2016				2015
Income taxes at statutory rate		$	13,782			$	12,769			$	13,043
State and local income taxes, net of federal tax benefit			555				576				680
Research and development tax credits			(295	)			(371	)			(380	)
Domestic production activities deduction			(1,191	)			(822	)			(964	)
Lower foreign taxes differential			(842	)			(820	)			(476	)
Uncertain tax positions			346				(93	)			26
Valuation allowance			100				-				(59	)
Federal tax reform – deferred rate change			(1,624	)			-				-
Deemed mandatory repatriation			1,370				-				-
Foreign withholding tax			600				-				-
Other			22				360				287
Income tax expense		$	12,823			$	11,599			$	12,157

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

		2017				2016				2015
Deferred tax assets:
Inventories		$	1,131			$	721			$	1,664
Accrued liabilities			1,872				3,139				2,450
Postretirement health benefits obligation			3,844				7,449				7,547
Pension			-				-				3,443
Other			583				879				292
Total deferred tax assets			7,430				12,188				15,396
Valuation allowance			(459	)			(277	)			(277	)
Net deferred tax assets			6,971				11,911				15,119
Deferred tax liabilities:
Depreciation and amortization			(8,715	)			(16,119	)			(18,059	)
Pension			(997	)			(3,017	)			-
Foreign withholding tax			(600	)			-				-
Total deferred tax liabilities			(10,312	)			(19,136	)			(18,059	)
Net def erred tax liabilities		$	(3,341	)		$	(7,225	)		$	(2,940	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

		2017				2016				2015
Balance at beginning of year		$	492			$	567			$	576
Additions based on tax positions related to the current year			239				101				113
Additions based on tax positions related to prior years			165				-				-
Reductions due to l apse of applicable statute of limitations			(99	)			(108	)			(101	)
Settlements			-				(68	)			(21	)
Balance at end of year		$	797			$	492			$	567

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- Definition

Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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