$FSTR
FOSTER L B CO Stock $fstr

$fstr Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-Q Financial Statement

#000035282519000046 Filed on October 30, 2019

Income Statement

Concept	2019 Q4	2019 Q3	2018 Q4
Revenue	$141.3M	$144.8M	$164.5M
YoY Change	-14.1%	-13.31%	16.42%
Cost Of Revenue	$113.1M	$116.9M	$91.70M
YoY Change	23.34%	-13.91%	-17.68%
Gross Profit	$28.20M	$27.95M	$30.60M
YoY Change	-7.85%	-10.71%	8.61%
Gross Profit Margin	19.95%	19.3%	18.6%
Selling, General & Admin	$19.70M	$21.04M	$17.30M
YoY Change	13.87%	-2.89%	-15.61%
% of Gross Profit	69.86%	75.26%	56.53%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.450M	$2.005M	$4.590M
YoY Change	-24.84%	-28.47%	-6.52%
% of Gross Profit	12.23%	7.17%	15.0%
Operating Expenses	$24.80M	$21.04M	$61.50M
YoY Change	-59.67%	-2.89%	173.33%
Operating Profit	$3.398M	$8.970M	-$30.90M
YoY Change	-111.0%	-19.74%	-644.48%
Interest Expense	-$900.0K	-$1.100M	-$1.300M
YoY Change	-30.77%	-180.47%	-31.58%
% of Operating Profit	-26.49%	-12.26%
Other Income/Expense, Net		$374.0K
YoY Change		-338.22%
Pretax Income	$2.500M	$4.590M	-$35.80M
YoY Change	-106.98%	-28.57%	-750.91%
Income Tax	-$27.70M	$836.0K	$4.700M
% Of Pretax Income	-1108.0%	18.21%
Net Earnings	$26.25M	$3.064M	-$41.15M
YoY Change	-163.79%	-52.18%	-52858.97%
Net Earnings / Revenue	18.57%	2.12%	-25.01%
Basic Earnings Per Share	$2.52	$0.29	-$3.97
Diluted Earnings Per Share	$2.46	$0.29	-$3.97
COMMON SHARES
Basic Shares Outstanding	10.58M shares	10.42M shares	10.56M shares
Diluted Shares Outstanding		10.67M shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$14.20M	$15.40M	$10.30M
YoY Change	37.86%	60.42%	-72.68%
Cash & Equivalents	$14.18M	$15.37M	$10.28M
Short-Term Investments
Other Short-Term Assets	$4.101M	$6.326M	$5.763M
YoY Change	-28.84%	-14.54%	-36.81%
Inventory	$118.5M	$128.7M	$124.5M
Prepaid Expenses
Receivables	$73.50M	$119.8M	$82.30M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$216.7M	$235.5M	$226.7M
YoY Change	-4.42%	11.85%	0.17%
LONG-TERM ASSETS
Property, Plant & Equipment	$82.31M	$82.79M	$86.86M
YoY Change	-5.23%	-5.8%	-9.61%
Goodwill	$19.57M	$18.93M	$19.26M
YoY Change	1.59%	-2.67%	-2.66%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.119M	$1.295M	$626.0K
YoY Change	78.75%	80.11%	-70.53%
Total Long-Term Assets	$188.5M	$160.8M	$156.6M
YoY Change	20.39%	0.49%	-10.75%
TOTAL ASSETS
Total Short-Term Assets	$216.7M	$235.5M	$226.7M
Total Long-Term Assets	$188.5M	$160.8M	$156.6M
Total Assets	$405.2M	$396.3M	$383.2M
YoY Change	5.72%	6.95%	-4.6%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$63.03M	$73.25M	$78.27M
YoY Change	-19.47%	1.23%	49.36%
Accrued Expenses	$15.56M	$14.15M	$13.62M
YoY Change	14.21%	54.56%	39.53%
Deferred Revenue	$8.446M	$8.710M	$6.619M
YoY Change	27.6%		366.13%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$2.900M	$3.000M	$600.0K
YoY Change	383.33%	400.0%	-14.29%
Total Short-Term Liabilities	$116.7M	$120.7M	$124.2M
YoY Change	-6.0%	5.02%	32.78%
LONG-TERM LIABILITIES
Long-Term Debt	$55.30M	$70.00M	$74.40M
YoY Change	-25.67%	-7.65%	-42.46%
Other Long-Term Liabilities	$11.92M	$16.10M	$17.30M
YoY Change	-31.12%	-4.22%	-1.11%
Total Long-Term Liabilities	$11.92M	$16.10M	$17.30M
YoY Change	-31.12%	-4.22%	-1.11%
TOTAL LIABILITIES
Total Short-Term Liabilities	$116.7M	$120.7M	$124.2M
Total Long-Term Liabilities	$11.92M	$16.10M	$17.30M
Total Liabilities	$128.7M	$136.8M	$141.5M
YoY Change	-9.07%	3.85%	27.44%
SHAREHOLDERS EQUITY
Retained Earnings	$157.5M	$131.3M	$114.3M
YoY Change	37.79%	-9.69%	-21.59%
Common Stock	$111.0K	$111.0K	$111.0K
YoY Change	0.0%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$16.80M	$16.83M	$18.17M
YoY Change	-7.54%	-7.35%	-2.66%
Treasury Stock Shares	693.7K shares	695.1K shares	749.8K shares
Shareholders Equity	$169.9M	$138.7M	$122.1M
YoY Change
Total Liabilities & Shareholders Equity	$405.2M	$396.3M	$383.2M
YoY Change	5.72%	6.95%	-4.6%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2018 Q4
OPERATING ACTIVITIES
Net Income	$26.25M	$3.064M	-$41.15M
YoY Change	-163.79%	-52.18%	-52858.97%
Depreciation, Depletion And Amortization	$3.450M	$2.005M	$4.590M
YoY Change	-24.84%	-28.47%	-6.52%
Cash From Operating Activities	$15.74M	$20.37M	$3.530M
YoY Change	345.89%	40.19%	-70.21%
INVESTING ACTIVITIES
Capital Expenditures	-$3.520M	$1.340M	-$2.050M
YoY Change	71.71%	-197.1%	153.09%
Acquisitions
YoY Change
Other Investing Activities	$900.0K	-$50.00K	$120.0K
YoY Change	650.0%	-100.95%	71.43%
Cash From Investing Activities	-$2.620M	$1.290M	-$1.930M
YoY Change	35.75%	-67.01%	160.81%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-14.83M	-18.09M	-1.490M
YoY Change	895.3%	-19.85%	-82.09%
NET CHANGE
Cash From Operating Activities	15.74M	20.37M	3.530M
Cash From Investing Activities	-2.620M	1.290M	-1.930M
Cash From Financing Activities	-14.83M	-18.09M	-1.490M
Net Change In Cash	-1.710M	3.570M	110.0K
YoY Change	-1654.55%	-186.44%	-96.06%
FREE CASH FLOW
Cash From Operating Activities	$15.74M	$20.37M	$3.530M
Capital Expenditures	-$3.520M	$1.340M	-$2.050M
Free Cash Flow	$19.26M	$19.03M	$5.580M
YoY Change	245.16%	19.61%	-55.92%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Registrant Name EntityRegistrantName	FOSTER L B CO
	dei	Entity Central Index Key EntityCentralIndexKey	0000352825
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	000-10436
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	25-1324733
	dei	Entity Address Address Line1 EntityAddressAddressLine1	415 Holiday Drive
	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 100
	dei	Entity Address City Or Town EntityAddressCityOrTown	Pittsburgh
	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	15220
	dei	City Area Code CityAreaCode	412
	dei	Local Phone Number LocalPhoneNumber	928-3400
	dei	Security12b Title Security12bTitle	Common stock, par value $0.01
	dei	Trading Symbol TradingSymbol	FSTR
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2019Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	10579259	shares
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15374000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10282000	USD
CY2019Q3	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	85039000	USD
CY2018Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	86123000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	128741000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	124504000	USD
CY2019Q3	us-gaap	Other Assets Current OtherAssetsCurrent	6326000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	5763000	USD
CY2019Q3	us-gaap	Assets Current AssetsCurrent	235480000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	226672000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	82793000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	86857000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	13234000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	18930000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	19258000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	44555000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	49836000	USD
CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1295000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	626000	USD
CY2019Q3	us-gaap	Assets Assets	396287000	USD
CY2018Q4	us-gaap	Assets Assets	383249000	USD
CY2019Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	73246000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	78269000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	8710000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	6619000	USD
CY2019Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	12407000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	12993000	USD
CY2019Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	1222000	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	2057000	USD
CY2019Q3	fstr	Accrued Legal Settlement Current AccruedLegalSettlementCurrent	8000000	USD
CY2018Q4	fstr	Accrued Legal Settlement Current AccruedLegalSettlementCurrent	10000000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2978000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	629000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	14153000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	13624000	USD
CY2019Q3	us-gaap	Liabilities Current LiabilitiesCurrent	120716000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	124191000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	70021000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	74353000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	4668000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	5287000	USD
CY2019Q3	fstr	Accrued Legal Settlement Non Current AccruedLegalSettlementNonCurrent	36000000	USD
CY2018Q4	fstr	Accrued Legal Settlement Non Current AccruedLegalSettlementNonCurrent	40000000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	10103000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	16104000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	17299000	USD
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	11115779	shares
CY2019Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	11115779	shares
CY2019Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10420635	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10366007	shares
CY2019Q3	us-gaap	Common Stock Value CommonStockValue	111000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	111000	USD
CY2019Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	49014000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	48040000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	131275000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	114324000	USD
CY2019Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	695144	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	749772	shares
CY2019Q3	us-gaap	Treasury Stock Value TreasuryStockValue	16829000	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	18165000	USD
CY2019Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-24896000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-22191000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	138675000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	122119000	USD
CY2019Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	396287000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	383249000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	154276000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	167094000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	505678000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	462438000	USD
CY2019Q3	us-gaap	Cost Of Revenue CostOfRevenue	126584000	USD
CY2018Q3	us-gaap	Cost Of Revenue CostOfRevenue	135791000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	411696000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	375880000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	27692000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	31303000	USD
	us-gaap	Gross Profit GrossProfit	93982000	USD
	us-gaap	Gross Profit GrossProfit	86558000	USD
CY2019Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	22264000	USD
CY2018Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	21662000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	67036000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	65488000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1655000	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1762000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5046000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5322000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-1079000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-1296000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-4031000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-4813000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	421000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-157000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	823000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	320000	USD
CY2019Q3	fstr	Total Operating Expenses TotalOperatingExpenses	24577000	USD
CY2018Q3	fstr	Total Operating Expenses TotalOperatingExpenses	24877000	USD
	fstr	Total Operating Expenses TotalOperatingExpenses	75290000	USD
	fstr	Total Operating Expenses TotalOperatingExpenses	75303000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3115000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	6426000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	18692000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11255000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2374000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1271000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	3064000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	6408000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16318000	USD
	us-gaap	Net Income Loss NetIncomeLoss	9984000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.57
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.96
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.53
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.95
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	3064000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	6408000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16318000	USD
	us-gaap	Net Income Loss NetIncomeLoss	9984000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1416000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-371000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1038000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-3132000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-151000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	207000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-1309000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1243000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	0	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	90000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	137000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	275000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	392000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1477000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-27000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2072000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1497000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1587000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6381000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	14246000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	8487000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16318000	USD
	us-gaap	Net Income Loss NetIncomeLoss	9984000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-541000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1477000	USD
	us-gaap	Depreciation Depreciation	8295000	USD
	us-gaap	Depreciation Depreciation	8685000	USD
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	5046000	USD
	us-gaap	Adjustment For Amortization AdjustmentForAmortization	5322000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	29000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-7000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	4000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-498000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2910000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2838000	USD
	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-910000	USD
	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	10634000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	4957000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	12960000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-480000	USD
	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	1160000	USD
	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	4042000	USD
	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	3025000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	425000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-1132000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-4193000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	19604000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	2143000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	2278000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-574000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-778000	USD
	fstr	Increase Decrease In Accrued Settlement IncreaseDecreaseInAccruedSettlement	-6000000	USD
	fstr	Increase Decrease In Accrued Settlement IncreaseDecreaseInAccruedSettlement	0	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-1041000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	2287000	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-1013000	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-176000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	13283000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	22425000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	253000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2267000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5037000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3196000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	156944000	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	0	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	3875000	USD
	fstr	Proceeds From Equity Method Investment Repayment Of Line Of Credit ProceedsFromEquityMethodInvestmentRepaymentOfLineOfCredit	0	USD
	fstr	Proceeds From Equity Method Investment Repayment Of Line Of Credit ProceedsFromEquityMethodInvestmentRepaymentOfLineOfCredit	1235000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4784000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	4181000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	153089000	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	154961000	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	99592000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	836000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	600000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	316000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3419000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-53813000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-885000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	5092000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-28092000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10282000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	37678000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	15374000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9586000	USD
	us-gaap	Interest Paid Net InterestPaidNet	3599000	USD
	us-gaap	Interest Paid Net InterestPaidNet	4468000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	6176000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	4077000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	136221000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	3064000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	90000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1416000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-151000	USD
CY2019Q3	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	543	shares
CY2019Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	9000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	876000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	138675000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	157891000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	6408000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	137000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-371000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	207000	USD
CY2018Q3	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	662	shares
CY2018Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	6000	USD
CY2018Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	934000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	165200000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	122119000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16318000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	275000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1038000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-1309000	USD
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	54628	shares
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	600000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2910000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	138675000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	154496000	USD
	us-gaap	Net Income Loss NetIncomeLoss	9984000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	392000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-3132000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	1243000	USD
	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	25431	shares
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	316000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2838000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	165200000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	7495000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	11176000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	32847000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	27837000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-1079000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-1296000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-4031000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-4813000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	421000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-157000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	823000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	320000	USD
CY2019Q3	fstr	Corporate Expense And Other Unallocated Charges CorporateExpenseAndOtherUnallocatedCharges	3722000	USD
CY2018Q3	fstr	Corporate Expense And Other Unallocated Charges CorporateExpenseAndOtherUnallocatedCharges	3297000	USD
	fstr	Corporate Expense And Other Unallocated Charges CorporateExpenseAndOtherUnallocatedCharges	10947000	USD
	fstr	Corporate Expense And Other Unallocated Charges CorporateExpenseAndOtherUnallocatedCharges	12089000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3115000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	6426000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	18692000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11255000	USD
CY2019Q3	us-gaap	Assets Assets	396287000	USD
CY2018Q4	us-gaap	Assets Assets	383249000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	34792000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	26692000	USD
CY2019Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	3343000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	1505000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	154276000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	167094000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	505678000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	462438000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	154276000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	167094000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	1460000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	505678000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	462438000	USD
	us-gaap	Contract With Customer Asset Reclassified To Receivable ContractWithCustomerAssetReclassifiedToReceivable	22320000	USD
	fstr	Contractwith Customer Liability Increasefrom Cash Receipts ContractwithCustomerLiabilityIncreasefromCashReceipts	3100000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	194000	USD
CY2018Q3	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	406000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	1146000	USD
CY2019Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	194083000	USD
CY2019Q3	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.077
CY2018Q4	us-gaap	Goodwill Goodwill	19258000	USD
	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-328000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	18930000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	81686000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	37131000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	44555000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	82980000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	33144000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	49836000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1655000	USD
CY2018Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1762000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5046000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5322000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	1525000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	5815000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	5781000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5698000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5211000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	20525000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	44555000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	44555000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	44555000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1152000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	932000	USD
CY2019Q3	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-96000	USD
CY2018Q3	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-267000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	8000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-986000	USD
CY2019Q3	us-gaap	Inventory Finished Goods InventoryFinishedGoods	69563000	USD
CY2018Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	69041000	USD
CY2019Q3	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	34792000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	26692000	USD
CY2019Q3	us-gaap	Inventory Work In Process InventoryWorkInProcess	3427000	USD
CY2018Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	6940000	USD
CY2019Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	20959000	USD
CY2018Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	21831000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	128741000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	124504000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	190036000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	188655000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	107243000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	101798000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	82793000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	86857000	USD
CY2019Q3	us-gaap	Depreciation Depreciation	2755000	USD
CY2018Q3	us-gaap	Depreciation Depreciation	2803000	USD
	us-gaap	Depreciation Depreciation	8295000	USD
	us-gaap	Depreciation Depreciation	8685000	USD
	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	0	USD
	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	0	USD
	fstr	Lessee Lease Renewal Term LesseeLeaseRenewalTerm	P12Y
	fstr	Lessee Lease Termination Period LesseeLeaseTerminationPeriod	P1Y
CY2019Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2019Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2019Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P2Y
CY2019Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.043
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	13234000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3131000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	10103000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	13234000	USD
CY2019Q3	fstr	Finance Lease Right Of Use Asset Gross FinanceLeaseRightOfUseAssetGross	3448000	USD
CY2019Q3	fstr	Finance Lease Right Of Use Asset Accumulated Depreciation FinanceLeaseRightOfUseAssetAccumulatedDepreciation	2828000	USD
CY2019Q3	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	620000	USD
CY2019Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	478000	USD
CY2019Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	142000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	620000	USD
CY2019Q3	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	182000	USD
	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	539000	USD
CY2019Q3	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	16000	USD
	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	37000	USD
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	992000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	2822000	USD
CY2019Q3	us-gaap	Sublease Income SubleaseIncome	0	USD
	us-gaap	Sublease Income SubleaseIncome	18000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	1190000	USD
	us-gaap	Lease Cost LeaseCost	3380000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	3287000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	539000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2459000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	1072000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	179000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3438000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	424000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2434000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	105000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2148000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	52000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1671000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	5054000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	15817000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	760000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2583000	USD
CY2019Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	140000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	13234000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	620000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	620000	USD
CY2018Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	974000	USD
CY2019Q3	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	72999000	USD
CY2018Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	74982000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2978000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	629000	USD
CY2019Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	70021000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	74353000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	17000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	16000	USD
CY2019Q3	us-gaap	Derivative Assets DerivativeAssets	0	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	675000	USD
CY2019Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	17000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	691000	USD
CY2019Q3	us-gaap	Derivative Liabilities DerivativeLiabilities	657000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	0	USD
CY2019Q3	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	657000	USD
CY2018Q4	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	0	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	3064000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	6408000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16318000	USD
	us-gaap	Net Income Loss NetIncomeLoss	9984000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	10420000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	10365000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	10406000	shares
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	10361000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	10420000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	10365000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	10406000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	10361000	shares
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	254000	shares
CY2018Q3	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	124000	shares
	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	225000	shares
	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	120000	shares
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	254000	shares
CY2018Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	124000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	225000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	120000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10674000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10489000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10631000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10481000	shares
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.57
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.96
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.53
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.95
CY2019Q3	us-gaap	Share Based Compensation ShareBasedCompensation	876000	USD
CY2018Q3	us-gaap	Share Based Compensation ShareBasedCompensation	934000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2910000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2838000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	5063000	USD
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y6M
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	18.61
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	18.63
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	19.51
	fstr	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Adjustment For Incentive Awards Expected To Vest Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentForIncentiveAwardsExpectedToVestWeightedAverageGrantDateFairValue	19.26
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	20.11
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	18.58
	fstr	Defined Contribution Plan Number DefinedContributionPlanNumber	6	plan
CY2019Q3	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	788000	USD
CY2018Q3	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	903000	USD
	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2317000	USD
	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2499000	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	2057000	USD
	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	515000	USD
	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	1350000	USD
CY2019Q3	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	1222000	USD
CY2017Q2	fstr	Number Of Companies Receiving General Notice Letter NumberOfCompaniesReceivingGeneralNoticeLetter	140	company
	fstr	Litigation Settlement Amount Awarded To Other Party Scheduled Payment Remainder Of Year LitigationSettlementAmountAwardedToOtherPartyScheduledPaymentRemainderOfYear	4000000	USD
	fstr	Litigation Settlement Amount Awarded To Other Party Scheduled Payment Year Two LitigationSettlementAmountAwardedToOtherPartyScheduledPaymentYearTwo	8000000	USD
	fstr	Litigation Settlement Amount Awarded To Other Party Scheduled Payment Year Three LitigationSettlementAmountAwardedToOtherPartyScheduledPaymentYearThree	8000000	USD
	fstr	Litigation Settlement Amount Awarded To Other Party Scheduled Payment Year Four LitigationSettlementAmountAwardedToOtherPartyScheduledPaymentYearFour	8000000	USD
	fstr	Litigation Settlement Amount Awarded To Other Party Scheduled Payment Year Five LitigationSettlementAmountAwardedToOtherPartyScheduledPaymentYearFive	8000000	USD
	fstr	Litigation Settlement Amount Awarded To Other Party Scheduled Payment After Year Five LitigationSettlementAmountAwardedToOtherPartyScheduledPaymentAfterYearFive	8000000	USD
	us-gaap	Litigation Settlement Amount Awarded To Other Party LitigationSettlementAmountAwardedToOtherParty	44000000	USD
CY2019Q3	fstr	Present Value Of Proposed Remedial Work PresentValueOfProposedRemedialWork	1100000000	USD
CY2019Q3	fstr	Undiscovered Remedial Work UndiscoveredRemedialWork	1700000000	USD
	fstr	Remedial Work Anticipated Clean Up Period RemedialWorkAnticipatedCleanUpPeriod	P13Y
CY2019Q3	fstr	Number Of Potentially Responsible Parties Included In Agreement NumberOfPotentiallyResponsiblePartiesIncludedInAgreement	100	company
CY2019Q3	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	6058000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	6128000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	6128000	USD
	us-gaap	Accrual For Environmental Loss Contingencies Charges To Expense For New Losses AccrualForEnvironmentalLossContingenciesChargesToExpenseForNewLosses	3000	USD
	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	73000	USD
CY2019Q3	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	6058000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3115000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	6426000	USD
CY2019Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.016
CY2018Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.003
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2374000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1271000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	18692000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11255000	USD
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.127
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.113

Files In Submission

Name	View Source	Status
0000352825-19-000046-index-headers.html	Edgar Link	pending
0000352825-19-000046-index.html	Edgar Link	pending
0000352825-19-000046.txt	Edgar Link	pending
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fstr-20190930.xsd	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$FSTR
FOSTER L B CO Stock $fstr

2019 Q4 Form 10-Q Financial Statement

#000035282519000046 Filed on October 30, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FSTR FOSTER L B CO Stock $fstr

2019 Q4 Form 10-Q Financial Statement

#000035282519000046 Filed on October 30, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FSTR
FOSTER L B CO Stock $fstr