CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net earnings	$ 56,502	$ 45,276
Adjustments to reconcile net earnings to cash provided by operating activities:
Depreciation and amortization	31,612	17,347
Provision for losses on receivables	(63)	123
LIFO expense	2,000	5,087
Deferred income tax benefit	(1,723)	(1,200)
Excess tax benefit from share-based compensation	(959)	(2,461)
Share-based compensation expense	5,200	2,987
Pension expense	15,400	6,990
Postretirement obligation	(63)	625
Loss on disposition of property, plant and equipment	247	828
Changes in:
Receivables, net	(18,645)	(34,440)
Income tax receivable	30	(231)
Inventories	(48,152)	(38,929)
Other current assets	(1,964)	(398)
Accounts payable	14,544	20,348
Pension contributions	(15,650)	0
Accrued liabilities	(4,769)	13,165
Net cash provided by operating activities	33,547	35,117
Cash flows from investing activites:
Additions to property, plant and equipment	(67,249)	(79,592)
Proceeds from disposition of property, plant and equipment	2,201	897
(Decrease) increase in other assets	(245)	355
Acquisition of other companies	(147,342)	(20,482)
Net cash used in investing activities	(212,635)	(98,822)
Cash flows from financing activites:
Payments of notes payable	(43,921)	0
Proceeds from notes payable	25,000	20,000
Dividends paid	(12,217)	(11,419)
Excess tax benefit from share-based compensation	959	2,461
Proceeds from exercise of stock options	1,822	4,305
Proceeds from equity offering	217,565	0
Net cash provided by financing activities	189,208	15,347
Effect of translation on cash and cash equivalents	221	(614)
Net increase (decrease) in cash and cash equivalents	10,341	(48,972)
Cash and cash equivalents at beginning of period	38,438	88,592
Cash and cash equivalents at end of period	$ 48,779	$ 39,620