Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (141,660)	$ (44,445)	$ 25,656
Adjustments to reconcile net loss to cash provided by operating activities:
Deferred income taxes	3,375	(14,582)	(2,914)
Depreciation	13,917	14,429	7,882
Amortization	9,575	12,245	4,695
Asset impairments	135,884	80,337	0
Equity loss (income) and remeasurement gain	1,290	(167)	(1,282)
Loss on sales and disposals of property, plant, and equipment	202	(2,064)	21
Share-based compensation	1,346	1,471	3,007
Excess income tax deficiency (benefit) from share-based compensation	332	(253)	(336)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	11,959	31,223	15,311
Inventories	10,479	4,331	(9,872)
Other current assets	1,380	3,248	(1,004)
Prepaid income tax	(13,035)	1,134	2,530
Other noncurrent assets	59	(909)	(386)
Dividends from LB Pipe & Coupling Products, LLC	0	90	630
Accounts payable	(16,005)	(17,204)	16,285
Deferred revenue	984	(2,279)	591
Accrued payroll and employee benefits	(2,676)	(5,136)	2,542
Other current liabilities	1,432	(4,189)	2,732
Other liabilities	(433)	(1,108)	651
Net cash provided by operating activities	18,405	56,172	66,739
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from the sale of property, plant, and equipment	969	5,339	184
Capital expenditures on property, plant and equipment	(7,664)	(14,913)	(17,056)
Acquisitions, net of cash acquired	0	(196,001)	(80,797)
Capital contributions to equity method investment	1,235	0	82
Net cash used by investing activities	(7,930)	(205,575)	(97,751)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of debt	(155,427)	(161,068)	(125)
Proceeds from debt	146,243	301,063	24,516
Proceeds from exercise of stock options and stock awards	0	68	131
Financing fees	(1,417)	(1,670)	(473)
Treasury stock acquisitions	(342)	(2,701)	(985)
Cash dividends on common stock paid to shareholders	(1,244)	(1,656)	(1,345)
Excess income tax (deficiency) benefit from share-based compensation	(332)	253	336
Net cash (used) provided by financing activities	(12,519)	134,289	22,055
Effect of exchange rate changes on cash and cash equivalents	(905)	(3,598)	(3,642)
Net decrease in cash and cash equivalents	(2,949)	(18,712)	(12,599)
Cash and cash equivalents at beginning of period	33,312	52,024	64,623
Cash and cash equivalents at end of period	30,363	33,312	52,024
Supplemental Disclosure of Cash Flow Information:
Interest paid	4,855	3,674	362
Income taxes paid	3,942	7,835	14,617
Capital expenditures funded through financing agreements	$ 0	$ 288	$ 1,981