Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Income (loss) from continuing operations	$ 22,001	$ 8,122
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Deferred income taxes	(661)	(8,797)
Depreciation and amortization	7,098	9,575
Equity in income of nonconsolidated investment	(892)	(643)
(Gain) loss on sales and disposals of property, plant and equipment	48	314
Deferred gain amortization on sale-leaseback		(456)
Share-based compensation	1,528	1,312
Excess tax benefit from share-based compensation	(192)	(121)
Change in operating assets and liabilities:
Accounts receivable	(28,931)	(19,061)
Inventories	13,392	(1,044)
Other current assets	(1,676)	(1,232)
Prepaid income tax	(3,418)	5,697
Other noncurrent assets	209	99
Dividend from L B Pipe & Coupling Products, LLC	558
Accounts payable - trade	6,298	9,163
Deferred revenue	(3,454)	3,050
Accrued payroll and employee benefits	(2,544)	(1,436)
Other current liabilities	(6,231)	21,200
Other liabilities	(666)	(463)
Net cash (used) provided by continuing operating activities	2,467	25,279
Net cash provided (used) by discontinued operations	257	(599)
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from the sale of property, plant and equipment		17
Capital expenditures on property, plant and equipment	(5,648)	(6,342)
Net cash used by continuing investing activities	(5,648)	(6,325)
Net cash used by discontinued operations		10,548
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of other long-term debt	(14)	(2,040)
Proceeds from exercise of stock options and stock awards	35	73
Treasury stock acquisitions	(633)	(653)
Cash dividends on common stock paid to shareholders	(931)	(772)
Excess tax benefit from share-based compensation	192	121
Net cash used by continuing financing activities	(1,351)	(3,271)
Effect of exchange rate changes on cash and cash equivalents	(1,192)	1,299
Net (decrease) increase in cash and cash equivalents	(5,467)	26,931
Cash and cash equivalents at beginning of period	101,464	73,727
Cash and cash equivalents at end of period	95,997	100,658
Supplemental Disclosure of Cash Flow Information:
Interest paid	257	301
Income taxes paid	$ 14,747	$ 10,696