XML 76 R59.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Acquisitions (Identifiable Intangible Assets Acquired) (Details) - USD ($) $ in Thousands | Nov. 23, 2015 | Mar. 13, 2015 | Jan. 13, 2015 | Dec. 30, 2014 | Oct. 29, 2014 | Jul. 07, 2014
--- | --- | --- | --- | --- | --- | ---
TEW Plus LTD [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  | $ 1,074 |  |  |  |  |
TEW Plus LTD [Member] | Trade name [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  | 0 |  |  |  |  |
TEW Plus LTD [Member] | Customer relationships [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  | 817 |  |  |  |  |
TEW Plus LTD [Member] | Technology [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  | 203 |  |  |  |  |
TEW Plus LTD [Member] | Non-competition agreements [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  | $ 54 |  |  |  |  |
Inspection Oilfield Services (IOS) [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets | [1],[2] |  | $ 50,354 |  |  |  |
Inspection Oilfield Services (IOS) [Member] | Trade name [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  | 2,641 |  |  |  |
Inspection Oilfield Services (IOS) [Member] | Customer relationships [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  | 41,171 |  |  |  |
Inspection Oilfield Services (IOS) [Member] | Technology [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  | 4,364 |  |  |  |
Inspection Oilfield Services (IOS) [Member] | Non-competition agreements [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  | $ 2,178 |  |  |  |
TEW Holdings, LTD [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  | $ 14,048 |  |  |
TEW Holdings, LTD [Member] | Trade name [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  | 870 |  |  |
TEW Holdings, LTD [Member] | Customer relationships [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  | 10,035 |  |  |
TEW Holdings, LTD [Member] | Technology [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  | 2,480 |  |  |
TEW Holdings, LTD [Member] | Non-competition agreements [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  | $ 663 |  |  |
Chemtec Energy Services, LLC [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  | $ 33,130 |  |
Chemtec Energy Services, LLC [Member] | Trade name [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  | 3,149 |  |
Chemtec Energy Services, LLC [Member] | Customer relationships [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  | 23,934 |  |
Chemtec Energy Services, LLC [Member] | Technology [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  | 4,930 |  |
Chemtec Energy Services, LLC [Member] | Non-competition agreements [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  | $ 1,117 |  |
FWO [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  | $ 419 |
FWO [Member] | Trade name [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  | 0 |
FWO [Member] | Customer relationships [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  | 34 |
FWO [Member] | Technology [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  | 341 |
FWO [Member] | Non-competition agreements [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  | $ 44 |
Carr Concrete [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  |  | $ 1,348
Carr Concrete [Member] | Trade name [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  |  | 613
Carr Concrete [Member] | Customer relationships [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  |  | 524
Carr Concrete [Member] | Technology [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  |  | 87
Carr Concrete [Member] | Non-competition agreements [Member] |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value estimate of acquired identifiable intangible assets |  |  |  |  |  |  | $ 124
[1] | See Note 4 Goodwill and Other Intangible Assets, and Note 7 Property, Plant, and Equipment, with respect to an impairment of property, plant, and equipment, intangible assets, and goodwill related to this acquisition.
[2] | See Note 4 Goodwill and Other Intangible Assets, with respect to an impairment of intangible assets related to this acquisition.

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=73531372&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fstr_TewPlusLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fstr_InspectionOilfieldServicesIosMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fstr_TewHoldingsLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fstr_ChemtecEnergyServicesLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fstr_FwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fstr_CarrConcreteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |