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Goodwill and Intangible Assets - Schedule of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance | $ 25,760 us-gaap_Goodwill | $ 20,478 us-gaap_Goodwill |
Adjustment for the sale of OCTG business | (4,412)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit |  |
Additions |  | 5,282 us-gaap_GoodwillAcquiredDuringPeriod |
Fourth quarter impairment | (16,066)us-gaap_GoodwillImpairmentLoss |  |
Goodwill, Ending Balance | 5,282 us-gaap_Goodwill | 25,760 us-gaap_Goodwill |
Water Transmission [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Ending Balance | 5,300 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_WaterTransmissionMember |  |
Water Transmission [Member] | Operating Segments [Member] |  |  |
Goodwill [Line Items] |  |  |
Additions |  | 5,282 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_WaterTransmissionMember |
Goodwill, Ending Balance | 5,282 us-gaap_Goodwill / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_WaterTransmissionMember | 5,282 us-gaap_Goodwill / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_WaterTransmissionMember |
Tubular Products [Member] |  |  |
Goodwill [Line Items] |  |  |
Fourth quarter impairment | (16,066)us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember | 0 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember | 0 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember
Goodwill, Ending Balance | 16,100 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember |  |
Tubular Products [Member] | Operating Segments [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill, Beginning Balance | 20,478 us-gaap_Goodwill / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember |  |
Adjustment for the sale of OCTG business | (4,412)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember |  |
Fourth quarter impairment | (16,066)us-gaap_GoodwillImpairmentLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember |  |
Goodwill, Ending Balance |  |  | $ 20,478 us-gaap_Goodwill / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = us-gaap_PublicUtilitiesInventoryTubularGoodsMember

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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