XML 79 R61.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 158,740 | $ 95,771
Accumulated Amortization | (23,813) | (13,637)
Net Carrying Amount | 134,927 | 82,134
Non-compete agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 6,984 | 4,143
Accumulated Amortization | (2,495) | (705)
Net Carrying Amount | 4,489 | 3,438
Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 378 | 564
Accumulated Amortization | (124) | (189)
Net Carrying Amount | 254 | 375
Customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 94,338 | 44,450
Accumulated Amortization | (8,441) | (4,679)
Net Carrying Amount | 85,897 | 39,771
Supplier relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 350 | 350
Accumulated Amortization | (335) | (268)
Net Carrying Amount | 15 | 82
Trademarks and trade names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 14,252 | 10,765
Accumulated Amortization | (3,025) | (1,855)
Net Carrying Amount | 11,227 | 8,910
Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 42,438 | 35,499
Accumulated Amortization | (9,393) | (5,941)
Net Carrying Amount | $ 33,045 | $ 29,558
Weighted Average [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period In Years | 14 years |
Weighted Average [Member] | Non-compete agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period In Years | 4 years | 5 years
Weighted Average [Member] | Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period In Years | 10 years | 10 years
Weighted Average [Member] | Customer relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period In Years | 16 years | 19 years
Weighted Average [Member] | Supplier relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period In Years | 5 years | 5 years
Weighted Average [Member] | Trademarks and trade names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period In Years | 13 years | 14 years
Weighted Average [Member] | Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period In Years | 13 years | 14 years

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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