XML 63 R53.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 01, 2022 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Finite-Lived Intangible Assets |  |  |  |  |  |
Amortization expense |  | $ 1,599 | $ 1,462 | $ 4,454 | $ 4,397 |
Customer relationships |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Increase (decrease) in gross carrying value of intangible assets | $ (5,448) |  |  |  |  |
Increase (decrease) in net carrying value of intangible assets | (2,869) |  |  |  |  |
Technology |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Increase (decrease) in gross carrying value of intangible assets | (471) |  |  |  |  |
Increase (decrease) in net carrying value of intangible assets | $ (7) |  |  |  |  |
Minimum |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Finite lived intangible asset, useful life |  |  |  | 1 year |  |
Maximum |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Finite lived intangible asset, useful life |  |  |  | 25 years |  |
Weighted Average |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Finite lived intangible asset, useful life |  |  |  | 15 years |  |
Weighted Average | Customer relationships |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Finite lived intangible asset, useful life |  |  |  | 16 years |  | 18 years
Weighted Average | Technology |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Finite lived intangible asset, useful life |  |  |  | 14 years |  | 13 years

X
- Definition Finite-Lived Intangible Assets, Gross, Period Increase (Decrease) + References No definition available. + Details
Name: | fstr_FiniteLivedIntangibleAssetsGrossPeriodIncreaseDecrease
Namespace Prefix: | fstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
Name: | us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 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 of increase (decrease) in carrying value of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |