Note 10 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	December 31,
	2015		2014		2013
Domestic	$	71,323	$	37,211	$	23,068
International		18,242		8,295		21,939
Total	$	89,565	$	45,506	$	45,007

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

	December 31,
	2015			2014			2013
Current:
Federal	$	2,577		$	2,572		$	630
State		-			-			15
International		10,076			512			5,980
		12,653			3,084			6,625
Deferred:
Federal	$	22,005		$	(14,965	)	$	7,014
International		(2,269	)		(746	)		1,093
		19,736			(15,711	)		8,107
Total	$	32,389		$	(12,627	)	$	14,732

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

	December 31,
	2015			2014			2013
Income tax provision at U.S federal statutory rate	$	31,347		$	15,927		$	15,752
Effect of foreign income taxed at rates other than the U.S. federal statutory rate		989			751			242
Foreign income inclusions		5,017			2,742			-
Tax credits		(4,685	)		(2,692	)		(250	)
Changes in tax laws		-			-			(1,155	)
Tax audit settlements		-			(3,948	)		-
Net change in valuation allowance		303			(26,543	)		(97	)
Permanent items and other		(582	)		1,136			240
Total	$	32,389		$	(12,627	)	$	14,732

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

	December 31,
	2015			2014
Deferred tax assets:
Inventory	$	3,032		$	3,313
Foreign tax credit carryforwards		3,990			19,925
Environmental		2,795			2,993
Net operating loss carryforwards (foreign)		1,191			3,381
Employee benefits		14,978			18,879
Research & experimentation tax credit carryforwards		-			480
Alternative minimum tax credit carryforwards		1,306			2,773
Property, plant and equipment		4,188			3,898
Other		6,251			5,605
Total gross deferred tax assets		37,731			61,247
Valuation allowance		(3,141	)		(5,053	)
Total deferred tax assets	$	34,590		$	56,194
Deferred tax liabilities:
Property, plant and equipment		(11,472	)		(9,649	)
Intangibles and other		(8,192	)		(10,487	)
Unremitted foreign earnings		(208	)		(726	)
Foreign tax allocation reserve		(2,071	)		(1,856	)
Other		(1,123	)		(1,978	)
Total deferred tax liabilities	$	(23,066	)	$	(24,696	)
Net deferred tax assets	$	11,524		$	31,498
Classified as follows in the consolidated balance sheet:
Non-current deferred tax asset		19,259			41,747
Non-current deferred tax liability		(7,735	)		(10,249	)
	$	11,524		$	31,498

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

	2015			2014			2013
Balance at January 1	$	1,643		$	3,922		$	3,967
Gross increases related to current period tax positions		281			275			257
Gross decreases related to prior period tax positions		(52	)		(1,149	)		(427	)
Expirations of statute of limitations for the assessment of taxes		(241	)		(106	)		(37	)
Settlements		-			(1,113	)		-
Foreign currency translation		(139	)		(186	)		162
Balance at December 31	$	1,492		$	1,643		$	3,922