Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Income from continuing operations	$ 29,276	$ 14,764	$ 22,067
Adjustments to reconcile income from continuing operations to net cash provided by operating activities:
Deferred income taxes	3,244	(4,563)	3,484
Depreciation and amortization	10,002	12,973	12,007
Equity in income of nonconsolidated investment	(1,316)	(837)	(707)
Loss on sales and disposals of property, plant and equipment	127	388	145
Deferred gain amortization on sale-leaseback		(456)	(1,081)
Share-based compensation	2,156	1,989	1,958
Excess tax benefit from share-based compensation	(203)	(199)	(425)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(37,057)	6,823	1,616
Inventories	29,919	(17,644)	(1,932)
Other current assets	(310)	(243)	923
Prepaid income tax	(6,882)	4,339	(2,141)
Other noncurrent assets	264	(194)	(136)
Dividends from LB Pipe & Coupling Products, LLC	558
Accounts payable	(5,206)	1,241	6,128
Deferred revenue	(1,805)	1,467	(9,609)
Accrued payroll and employee benefits	(608)	75	(454)
Other current liabilities	(7,561)	6,655	(2,161)
Other liabilities	(718)	381	1,925
Net cash provided by continuing operating activities	13,880	26,959	31,607
Net cash provided (used) by discontinued operations	275	176	(825)
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from the sale of property, plant and equipment		24	41
Capital expenditures on property, plant and equipment	(9,674)	(7,160)	(11,733)
Acquisitions	(37,500)		(8,952)
Capital contributions to equity method investment			(800)
Net cash used by continuing investing activities	(47,174)	(7,136)	(21,444)
Net cash provided (used) by discontinued operations		10,548	(206)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of other long-term debt	(6)	(2,373)	(2,366)
Proceeds from exercise of stock options and stock awards	35	122	207
Treasury stock acquisitions	(708)	(669)	(6,592)
Cash dividends on common stock paid to shareholders	(1,240)	(1,029)	(1,022)
Excess tax benefit from share-based compensation	203	199	425
Net cash used by continuing financing activities	(1,716)	(3,750)	(9,348)
Effect of exchange rate changes on cash and cash equivalents	(2,106)	940	(857)
Net (decrease) increase in cash and cash equivalents	(36,841)	27,737	(1,073)
Cash and cash equivalents at beginning of period	101,464	73,727	74,800
Cash and cash equivalents at end of period	64,623	101,464	73,727
Supplemental Disclosure of Cash Flow Information:
Interest paid	330	405	505
Income taxes paid	$ 18,697	$ 11,999	$ 9,395