Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

	December 31,
	2016		2015		2014
Domestic	$	91,597	$	71,323	$	37,211
International		35,942		18,242		8,295
Total	$	127,539	$	89,565	$	45,506

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

	December 31,
	2016		2015			2014
Current:
Federal	$	21,167	$	2,577		$	2,572
International		10,491		10,076			512
Total Current		31,658		12,653			3,084
Deferred:
Federal	$	8,350	$	22,005		$	(14,965	)
International		206		(2,269	)		(746	)
Total Deferred		8,556		19,736			(15,711	)
Total Income Tax Expense/ (Benefit)	$	40,214	$	32,389		$	(12,627	)

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

	December 31,
	2016			2015			2014
Income tax provision at U.S federal statutory rate	$	44,638		$	31,347		$	15,927
State and local taxes, net of federal income tax benefit		(2,310	)		(2,450	)		(1,516	)
Effect of foreign income taxed at rates other than the U.S. federal statutory rate		(1,154	)		989			751
Foreign income inclusions		-			5,017			2,742
Tax credits		(200	)		(4,685	)		(2,692	)
Tax audit settlements		-			-			(3,948	)
Net change in valuation allowance		1,673			3,134			(25,169	)
Domestic production deduction		(2,327	)		(1,958	)		(1,488	)
Permanent items and other		(106	)		995			2,766
Total	$	40,214		$	32,389		$	(12,627	)

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

	December 31,
	2016			2015
Deferred tax assets:
Inventory	$	2,769		$	3,032
Foreign tax credit carryforwards		-			3,990
Environmental		5,776			2,795
Net operating loss carryforwards		13,272			7,930
Employee benefits		16,155			14,978
Alternative minimum tax credit carryforwards		-			1,306
Property, plant and equipment		4,448			4,188
Other		7,352			6,234
Total gross deferred tax assets		49,772			44,453
Valuation allowance		(11,459	)		(9,863	)
Total deferred tax assets	$	38,313		$	34,590
Deferred tax liabilities:
Property, plant and equipment		(17,709	)		(11,472	)
Intangibles and other		(10,583	)		(8,192	)
Unremitted foreign earnings		(635	)		(208	)
Foreign tax allocation reserve		(2,471	)		(2,071	)
Other		(775	)		(1,123	)
Total deferred tax liabilities	$	(32,173	)	$	(23,066	)
Net deferred tax assets	$	6,140		$	11,524
Classified as follows in the consolidated balance sheet:
Non-current deferred tax asset		13,061			19,259
Non-current deferred tax liability		(6,921	)		(7,735	)
Total	$	6,140		$	11,524

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

	2016			2015			2014
Balance at January 1	$	1,492		$	1,643		$	3,922
Gross increases related to current period tax positions		687			281			275
Gross decreases related to prior period tax positions		(84	)		(52	)		(1,149	)
Expirations of statute of limitations for the assessment of taxes		(257	)		(241	)		(106	)
Settlements		-			-			(1,113	)
Foreign currency translation		(60	)		(139	)		(186	)
Balance at December 31	$	1,778		$	1,492		$	1,643