Note 20 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	2013
	Manufacturing		Distribution		Total
Net outside sales	$	458,438	$	136,493	$	594,931
Intersegment sales		19,264		2,606		21,870
Total sales		477,702		139,099		616,801
Cost of goods sold		407,528		116,039		523,567
Operating income		43,860		8,040		51,900
Identifiable assets		98,058		41,449		139,507
Depreciation and amortization		4,906		625		5,531

	2012
	Manufacturing		Distribution		Total
Net outside sales	$	330,941	$	106,426	$	437,367
Intersegment sales		16,007		1,830		17,837
Total sales		346,948		108,256		455,204
Cost of goods sold		296,641		90,155		386,796
Operating income		30,798		5,727		36,525
Identifiable assets		85,523		25,745		111,268
Depreciation and amortization		3,851		399		4,250

	2011
	Manufacturing		Distribution		Total
Net outside sales	$	232,460	$	75,362	$	307,822
Intersegment sales		11,800		360		12,160
Total sales		244,260		75,722		319,982
Cost of goods sold		210,797		63,636		274,433
Operating income		18,805		2,689		21,494
Identifiable assets		50,139		16,446		66,585
Depreciation and amortization		3,553		330		3,883

Reconciliation of Certain Line Items Pertaining to Total Reportable Segments [Table Text Block]

	2013			2012			2011
Net sales:
Total sales for reportable segments	$	616,801		$	455,204		$	319,982
Elimination of intersegment sales		(21,870	)		(17,837	)		(12,160	)
Consolidated net sales	$	594,931		$	437,367		$	307,822
Cost of goods sold:
Total cost of goods sold for reportable segments	$	523,567		$	386,796		$	274,433
Elimination of intersegment cost of goods sold		(21,870	)		(17,837	)		(12,160	)
Other		2,211			2,664			1,241
Consolidated cost of goods sold	$	503,908		$	371,623		$	263,514
Operating income:
Operating income for reportable segments	$	51,900		$	36,525		$	21,494
Gain on sale of fixed assets and acquisition of business		430			238			244
Unallocated corporate expenses		(9,014	)		(8,200	)		(7,434	)
Amortization		(2,371	)		(1,523	)		(829	)
Consolidated operating income	$	40,945		$	27,040		$	13,475
Consolidated total assets:
Identifiable assets for reportable segments	$	139,507		$	111,268		$	66,585
Corporate property and equipment		22,871			22,025			14,769
Current and long-term assets not allocated to segments		9,544			7,028			1,844
Intangibles and other assets not allocated to segments		2,265			3,148			2,572
Consolidated total assets	$	174,187		$	143,469		$	85,770
Depreciation and amortization:
Depreciation and amortization for reportable segments	$	5,531		$	4,250		$	3,883
Corporate depreciation and amortization		1,766			1,336			1,033
Consolidated depreciation and amortization	$	7,297		$	5,586		$	4,916