CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net earnings	$ 30,207	$ 30,851
Adjustments to reconcile net earnings to cash provided by operating activities:
Depreciation and amortization	20,941	11,318
Provision for losses on receivables	5	37
LIFO expense	2,200	2,682
Deferred income tax benefit	(1,198)	(997)
Excess tax benefit from share-based compensation	(886)	(2,458)
Share-based compensation expense	3,416	2,873
Pension expense	10,790	4,660
Postretirement obligation	278	257
(Gain) loss on disposition of property, plant and equipment	(784)	309
Changes in:
Receivables, net	(487)	(23,819)
Income tax receivable	60	(394)
Inventories	(46,709)	(31,714)
Other current assets	(4,022)	(914)
Accounts payable	8,935	27,555
Pension contributions	(2,075)	0
Accrued liabilities	(16,236)	7,509
Net cash provided by operating activities	4,435	27,755
Cash flows from investing activites:
Additions to property, plant and equipment	(38,337)	(48,898)
Proceeds from disposition of property, plant and equipment	1,680	206
Decrease in other assets	(892)	(198)
Acquisition of other companies	(147,342)	(1,500)
Net cash used in investing activities	(184,891)	(50,390)
Cash flows from financing activites:
Payments of notes payable	(39,546)	0
Proceeds from notes payable	25,000	0
Dividends paid	(8,023)	(7,611)
Excess tax benefit from share-based compensation	886	2,458
Proceeds from exercise of stock options	1,633	4,294
Proceeds from equity offering	217,565	0
Net cash provided by (used in) financing activities	197,515	(859)
Effect of translation on cash and cash equivalents	(1,110)	549
Net increase (decrease) in cash and cash equivalents	15,949	(22,945)
Cash and cash equivalents at beginning of period	38,438	88,592
Cash and cash equivalents at end of period	$ 54,387	$ 65,647