$MRTN
MARTEN TRANSPORT LTD Stock $mrtn

$mrtn Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000143774920003828 Filed on February 28, 2020

Income Statement

Concept	2019 Q4	2019 Q1	2018 Q4
Revenue	$217.2M	$199.0M	$204.0M
YoY Change	6.48%	6.45%	11.59%
Cost Of Revenue	$145.7M	$129.5M	$133.8M
YoY Change	8.89%	5.37%	11.04%
Gross Profit	$71.40M	$69.60M	$70.20M
YoY Change	1.71%	8.58%	12.68%
Gross Profit Margin	32.88%	34.97%	34.42%
Selling, General & Admin	$26.00M	$25.70M	$24.50M
YoY Change	6.12%	4.05%	6.99%
% of Gross Profit	36.41%	36.93%	34.9%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$24.80M	$22.54M	$22.30M
YoY Change	11.21%	3.34%	5.19%
% of Gross Profit	34.73%	32.39%	31.77%
Operating Expenses	$56.00M	$181.3M	$52.60M
YoY Change	6.46%	4.57%	8.45%
Operating Profit	$18.79M	$17.73M	$19.54M
YoY Change	-3.84%	30.45%	36.31%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net	$300.0K	$278.0K	$200.0K
YoY Change	50.0%	47.09%	-300.0%
Pretax Income	$19.00M	$18.01M	$19.80M
YoY Change	-4.04%	30.68%	39.44%
Income Tax	$3.300M	$4.465M	$4.000M
% Of Pretax Income	17.37%	24.79%	20.2%
Net Earnings	$15.75M	$13.55M	$15.74M
YoY Change	0.07%	31.12%	-75.82%
Net Earnings / Revenue	7.25%	6.81%	7.72%
Basic Earnings Per Share	$0.19	$0.17	$0.29
Diluted Earnings Per Share	$0.19	$0.16	$0.29
COMMON SHARES
Basic Shares Outstanding	54.69M	54.55M
Diluted Shares Outstanding		55.05M

Balance Sheet

Concept	2019 Q4	2019 Q1	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$31.50M	$85.50M	$56.80M
YoY Change	-44.54%	722.12%	259.49%
Cash & Equivalents	$31.46M	$85.53M	$56.76M
Short-Term Investments
Other Short-Term Assets	$3.166M	$18.00M	$2.971M
YoY Change	6.56%	-6.25%	6.64%
Inventory
Prepaid Expenses
Receivables	$90.71M	$84.44M	$83.03M
Other Receivables	$11.10M	$5.300M	$3.800M
Total Short-Term Assets	$154.2M	$193.3M	$163.5M
YoY Change	-5.73%	62.8%	40.23%
LONG-TERM ASSETS
Property, Plant & Equipment	$640.4M	$578.2M	$588.2M
YoY Change	8.87%	-2.21%	2.85%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$2.026M	$3.281M	$2.146M
YoY Change	-5.59%	59.12%	15.07%
Total Long-Term Assets	$642.4M	$581.3M	$590.4M
YoY Change	8.82%	-2.02%	2.89%
TOTAL ASSETS
Total Short-Term Assets	$154.2M	$193.3M	$163.5M
Total Long-Term Assets	$642.4M	$581.3M	$590.4M
Total Assets	$796.6M	$774.5M	$753.9M
YoY Change	5.66%	8.79%	9.2%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$22.92M	$18.51M	$15.70M
YoY Change	45.93%	-62.53%	-4.7%
Accrued Expenses	$21.68M	$31.60M	$28.17M
YoY Change	-23.03%		30.27%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$76.33M	$79.54M	$71.97M
YoY Change	6.05%	6.29%	11.97%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$600.0K	$500.0K
YoY Change
Total Long-Term Liabilities	$600.0K	$500.0K	$0.00
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$76.33M	$79.54M	$71.97M
Total Long-Term Liabilities	$600.0K	$500.0K	$0.00
Total Liabilities	$199.0M	$186.8M	$178.0M
YoY Change	11.83%	5.82%	7.91%
SHAREHOLDERS EQUITY
Retained Earnings	$517.3M	$510.5M	$498.6M
YoY Change	3.75%	13.69%	11.16%
Common Stock	$80.29M	$77.23M	$77.36M
YoY Change	3.78%	-0.29%	0.52%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$597.6M	$587.7M	$576.0M
YoY Change
Total Liabilities & Shareholders Equity	$796.6M	$774.5M	$753.9M
YoY Change	5.66%	8.79%	9.2%

Cashflow Statement

Concept	2019 Q4	2019 Q1	2018 Q4
OPERATING ACTIVITIES
Net Income	$15.75M	$13.55M	$15.74M
YoY Change	0.07%	31.12%	-75.82%
Depreciation, Depletion And Amortization	$24.80M	$22.54M	$22.30M
YoY Change	11.21%	3.34%	5.19%
Cash From Operating Activities	$34.50M	$37.63M	$42.10M
YoY Change	-18.05%	62.32%	54.78%
INVESTING ACTIVITIES
Capital Expenditures	-$58.80M	-$14.40M	-$31.20M
YoY Change	88.46%	-65.96%	65.08%
Acquisitions
YoY Change
Other Investing Activities	$16.80M	$25.00K	$15.30M
YoY Change	9.8%	177.78%	101.32%
Cash From Investing Activities	-$42.00M	-$6.736M	-$16.10M
YoY Change	160.87%	-75.41%	42.48%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.500M	-$2.129M	-5.100M
YoY Change	-70.59%	79.97%	292.31%
NET CHANGE
Cash From Operating Activities	34.50M	$37.63M	42.10M
Cash From Investing Activities	-42.00M	-$6.736M	-16.10M
Cash From Financing Activities	-1.500M	-$2.129M	-5.100M
Net Change In Cash	-9.000M	$28.76M	20.90M
YoY Change	-143.06%	-633.34%	43.15%
FREE CASH FLOW
Cash From Operating Activities	$34.50M	$37.63M	$42.10M
Capital Expenditures	-$58.80M	-$14.40M	-$31.20M
Free Cash Flow	$93.30M	$52.03M	$73.30M
YoY Change	27.29%	-20.55%	59.0%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000799167
CY2019	dei	Entity Registrant Name EntityRegistrantName	MARTEN TRANSPORT LTD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	31461000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	56763000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	90712000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	83033000	USD
CY2019Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	11055000	USD
CY2018Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	3808000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	20938000	USD
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	54766814
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	5	pure
CY2019	mrtn	Loss On Deposits Above Fdic Amount LossOnDepositsAboveFDICAmount	0	USD
CY2017Q3	mrtn	Stock Issued During Period Percentage Of Shares Stock Split StockIssuedDuringPeriodPercentageOfSharesStockSplit	0.6667	pure
CY2007Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	1000000
CY2015Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	2000000
CY2019	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	0
CY2017	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	0
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2019	mrtn	Customer Contract Term CustomerContractTerm	P1Y
CY2018	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	382000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	348000	USD
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2019Q4	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
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	192000000
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	192000000
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	54703466
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	54466691
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	54703466
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	54466691
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	19924000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	154166000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	163528000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	263843000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	228200000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	640394000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	588230000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2026000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2146000	USD
CY2019Q4	us-gaap	Assets Assets	796586000	USD
CY2018Q4	us-gaap	Assets Assets	753904000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	22917000	USD
CY2018	mrtn	Purchased Transportation PurchasedTransportation	144611000	USD
CY2017	mrtn	Purchased Transportation PurchasedTransportation	118349000	USD
CY2019	mrtn	Fuel And Fuel Tax Expense FuelAndFuelTaxExpense	121341000	USD
CY2018	mrtn	Fuel And Fuel Tax Expense FuelAndFuelTaxExpense	121633000	USD
CY2017	mrtn	Fuel And Fuel Tax Expense FuelAndFuelTaxExpense	105390000	USD
CY2019	mrtn	Supplies And Maintenance Expense SuppliesAndMaintenanceExpense	46737000	USD
CY2018	mrtn	Supplies And Maintenance Expense SuppliesAndMaintenanceExpense	40853000	USD
CY2017	mrtn	Supplies And Maintenance Expense SuppliesAndMaintenanceExpense	41613000	USD
CY2019	us-gaap	Depreciation Depreciation	95137000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	15704000	USD
CY2019Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	31729000	USD
CY2018Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	28103000	USD
CY2019Q4	mrtn	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	21680000	USD
CY2018Q4	mrtn	Accrued And Other Liabilities Current AccruedAndOtherLiabilitiesCurrent	28166000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	76326000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	71973000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	122022000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	105977000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	649000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2019Q4	us-gaap	Liabilities Liabilities	198997000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	177950000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	547000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	545000	USD
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CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	76814000	USD
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CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	498595000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	597589000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	575954000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	796586000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	753904000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	843271000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	787594000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	698120000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	274156000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	252047000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	226091000	USD
CY2019	mrtn	Purchased Transportation PurchasedTransportation	158948000	USD
CY2018	us-gaap	Depreciation Depreciation	88585000	USD
CY2017	us-gaap	Depreciation Depreciation	85120000	USD
CY2019	us-gaap	Taxes And Licenses TaxesAndLicenses	10100000	USD
CY2018	us-gaap	Taxes And Licenses TaxesAndLicenses	9473000	USD
CY2017	us-gaap	Taxes And Licenses TaxesAndLicenses	8993000	USD
CY2019	us-gaap	General Insurance Expense GeneralInsuranceExpense	38201000	USD
CY2018	us-gaap	General Insurance Expense GeneralInsuranceExpense	38657000	USD
CY2017	us-gaap	General Insurance Expense GeneralInsuranceExpense	38585000	USD
CY2019	mrtn	Communications And Utilities Expense CommunicationsAndUtilitiesExpense	7709000	USD
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CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	76498000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	70348000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	56862000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1190000	USD
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CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	71029000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16617000	USD
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	61071000	USD
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CY2017	us-gaap	Net Income Loss NetIncomeLoss	90284000	USD
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CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
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CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.77
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CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1817000	USD
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CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	25000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	15000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	43000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-137229000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	61071000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	55027000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	90284000	USD
CY2019	us-gaap	Depreciation Depreciation	95137000	USD
CY2018	us-gaap	Depreciation Depreciation	88585000	USD
CY2017	us-gaap	Depreciation Depreciation	85120000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	8680000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	7244000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	5499000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	16045000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5351000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-47228000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1817000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3323000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1250000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-155000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	493000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-271000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	227000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	400000	USD
CY2019	mrtn	Adoption Of Accounting Standard AdoptionOfAccountingStandard	0	USD
CY2018	mrtn	Adoption Of Accounting Standard AdoptionOfAccountingStandard	485000	USD
CY2017	mrtn	Adoption Of Accounting Standard AdoptionOfAccountingStandard	0	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	13638000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	8131000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	5974000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	524000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	114000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	503000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	5259000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1800000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	11000	USD
CY2019	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	3626000	USD
CY2018	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	1926000	USD
CY2017	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	6737000	USD
CY2019	mrtn	Increase Decrease In Accrued Other Current Liabilities IncreaseDecreaseInAccruedOtherCurrentLiabilities	-7088000	USD
CY2018	mrtn	Increase Decrease In Accrued Other Current Liabilities IncreaseDecreaseInAccruedOtherCurrentLiabilities	9881000	USD
CY2017	mrtn	Increase Decrease In Accrued Other Current Liabilities IncreaseDecreaseInAccruedOtherCurrentLiabilities	-2990000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	153180000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	150623000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	121879000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-101270000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-95318000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	42089000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5459000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4361000	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2017	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	40831000	USD
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	-0	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	-0	USD
CY2017	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	48717000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	-0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3756000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	-0	USD
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1620000	USD
CY2018	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	938000	USD
CY2017	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1090000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	784000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	104000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	47000	USD
CY2019	mrtn	Payments For Fractional Shares Of Stock Split PaymentsForFractionalSharesOfStockSplit	-0	USD
CY2018	mrtn	Payments For Fractional Shares Of Stock Split PaymentsForFractionalSharesOfStockSplit	-0	USD
CY2017	mrtn	Payments For Fractional Shares Of Stock Split PaymentsForFractionalSharesOfStockSplit	54000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-41253000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-8381000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-11258000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashAndCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-25302000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashAndCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	40972000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashAndCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	15303000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	56763000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15791000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	488000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	31461000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	56763000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15791000	USD
CY2019	mrtn	Increase Decrease Capital Expenditures Incurred But Not Yet Paid IncreaseDecreaseCapitalExpendituresIncurredButNotYetPaid	249000	USD
CY2018	mrtn	Increase Decrease Capital Expenditures Incurred But Not Yet Paid IncreaseDecreaseCapitalExpendituresIncurredButNotYetPaid	-3604000	USD
CY2017	mrtn	Increase Decrease Capital Expenditures Incurred But Not Yet Paid IncreaseDecreaseCapitalExpendituresIncurredButNotYetPaid	-1559000	USD
CY2019	mrtn	Operating Lease Assets And Liabilities Acquired OperatingLeaseAssetsAndLiabilitiesAcquired	1668000	USD
CY2018	mrtn	Operating Lease Assets And Liabilities Acquired OperatingLeaseAssetsAndLiabilitiesAcquired	0	USD
CY2017	mrtn	Operating Lease Assets And Liabilities Acquired OperatingLeaseAssetsAndLiabilitiesAcquired	0	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4953000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	9526000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	14355000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	52000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	50000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	151000	USD
CY2019Q4	mrtn	Number Of Dry Vans NumberOfDryVans	1650	pure
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	5	pure
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	pure
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:left;"/><p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:left;"/> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;text-indent:36pt;"><b/><b>Use of estimates:</b> We must make estimates and assumptions to prepare the consolidated financial statements in conformity with U.S. generally accepted accounting principles. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities in the consolidated financial statements and the reported amount of revenue and expenses during the reporting period. These estimates are primarily related to insurance and claims accruals and depreciation. Ultimate results could differ from these estimates.</p>
CY2019Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3281000	USD
CY2019Q1	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	28706000	USD
CY2019Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	595000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2026000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	21680000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	649000	USD
CY2019Q4	us-gaap	Prepaid Insurance PrepaidInsurance	2356000	USD
CY2018Q4	us-gaap	Prepaid Insurance PrepaidInsurance	1831000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	1729000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	1823000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	3166000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	2971000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	20938000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	19924000	USD
CY2019Q4	mrtn	Accrued Expenses AccruedExpenses	6738000	USD
CY2018Q4	mrtn	Accrued Expenses AccruedExpenses	7091000	USD
CY2019Q4	us-gaap	Accrued Vacation Current AccruedVacationCurrent	6558000	USD
CY2018Q4	us-gaap	Accrued Vacation Current AccruedVacationCurrent	5895000	USD
CY2019Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	5438000	USD
CY2018Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	9744000	USD
CY2019Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	1222000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2946000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	4214000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	21680000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	28166000	USD
CY2018Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	40000000.0	USD
CY2018Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	30000000.0	USD
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5351000	USD
CY2019Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	14300000	USD
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2019Q3	mrtn	Line Of Credit Facility Dividend Restrictions Percentage Of Net Income Limit LineOfCreditFacilityDividendRestrictionsPercentageOfNetIncomeLimit	0.25	pure
CY2019Q3	mrtn	Line Of Credit Facility Waiver To Pay Dividends Maximum LineOfCreditFacilityWaiverToPayDividendsMaximum	65000000	USD
CY2019Q4	us-gaap	Accounts Payable Related Parties Current And Noncurrent AccountsPayableRelatedPartiesCurrentAndNoncurrent	19000	USD
CY2018Q4	us-gaap	Accounts Payable Related Parties Current And Noncurrent AccountsPayableRelatedPartiesCurrentAndNoncurrent	0	USD
CY2017	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	-56500000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2017	mrtn	Deferred Income Tax Expense Benefit Excluding Effective Changes In Tax Rate DeferredIncomeTaxExpenseBenefitExcludingEffectiveChangesInTaxRate	8000000.0	USD
CY2017	mrtn	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Excluding Changes In Tax Rate Percent EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateExcludingChangesInTaxRatePercent	0.401	pure
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1210000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7575000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	12427000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1782000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3076000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	990000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	572000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	10651000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	13417000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15572000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5815000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-48424000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	473000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-464000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1196000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	16045000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-47228000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16617000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16002000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-33811000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3000000.0	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1900000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2900000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	13000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.02	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.03	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.03	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.01	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.02	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.04	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-1	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.02	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.02	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.01	pure
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.01	pure
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.01	pure
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.01	pure
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.21	pure
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.23	pure
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.60	pure
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	9050000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	7986000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2464000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2313000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	11514000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	10299000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	130686000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	113773000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2850000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2503000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	133536000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	116276000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	122022000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	105977000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	12000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	61071000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	55027000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	90284000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54630000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54590000
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	54492000
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	483000
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	559000
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	358000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55113000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	55149000
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	54850000
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.12
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.66
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.65
CY2017Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2015Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	40000000	USD
CY2017Q3	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	3300000
CY2019Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	34000000	USD
CY2019Q3	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	1800000
CY2018Q4	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	200000
CY2018Q4	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3800000	USD
CY2019Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	34000000	USD
CY2019Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	1800000
CY2019Q3	mrtn	Line Of Credit Facility Waiver To Pay Dividends Maximum LineOfCreditFacilityWaiverToPayDividendsMaximum	65000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	42100000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5500000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4400000	USD
CY2019Q3	mrtn	Line Of Credit Facility Dividend Restrictions Percentage Of Net Income Limit LineOfCreditFacilityDividendRestrictionsPercentageOfNetIncomeLimit	0.25	pure
CY2018Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2018Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	96000000
CY2018Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	192000000
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	547000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	325000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	168000	USD
CY2019Q4	mrtn	Lessee Operating Lease Liability Payments Due Year Four And Five LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndFive	208000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1248000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	70000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P37M
CY2019Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P29M
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.024	pure
CY2019Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.021	pure
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	533000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	579000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Granted ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted	1133362
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.28	pure
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.26	pure
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.25	pure
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.022	pure
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.028	pure
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.020	pure
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0058	pure
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0048	pure
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0059	pure
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.89
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	6.19
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	4.34
CY2019	mrtn	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Forfeiture Rate Of Unvested Outstanding Awards ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedForfeitureRateOfUnvestedOutstandingAwards	0.0125	pure
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1800000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	1400000	USD
CY2019	mrtn	Allocated Share Based Compensation Expense Net Of Tax Amount Per Basic And Diluted Share AllocatedShareBasedCompensationExpenseNetOfTaxAmountPerBasicAndDilutedShare	0.03
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3300000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	2600000	USD
CY2018	mrtn	Allocated Share Based Compensation Expense Net Of Tax Amount Per Basic And Diluted Share AllocatedShareBasedCompensationExpenseNetOfTaxAmountPerBasicAndDilutedShare	0.05
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1300000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	738000	USD
CY2017	mrtn	Allocated Share Based Compensation Expense Net Of Tax Amount Per Basic And Diluted Share AllocatedShareBasedCompensationExpenseNetOfTaxAmountPerBasicAndDilutedShare	0.01
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	939193
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.78
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	68000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	20.00
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	151594
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	10.68
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	13270
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	15.73
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	842329
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.81
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	523677
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	12.69
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	842329
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y4M24D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	5800000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	523677
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y4M24D
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	4600000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1400000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1500000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	830000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1600000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	938000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1100000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	569000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	547000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	515000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.35	pure
CY2019	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06	pure
CY2019	us-gaap	Defined Contribution Plan Employers Matching Contribution Annual Vesting Percentage DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage	0.20	pure
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2700000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2300000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2100000	USD
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	pure
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1200000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	5	pure
CY2019	us-gaap	Capitalized Contract Cost Impairment Loss CapitalizedContractCostImpairmentLoss	0	USD
CY2019	us-gaap	Revenues Revenues	843271000	USD
CY2018	us-gaap	Revenues Revenues	787594000	USD
CY2017	us-gaap	Revenues Revenues	698120000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	76498000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	70348000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	56862000	USD
CY2019Q1	us-gaap	Revenues Revenues	199023000	USD
CY2019Q2	us-gaap	Revenues Revenues	212090000	USD
CY2019Q3	us-gaap	Revenues Revenues	214973000	USD
CY2019Q4	us-gaap	Revenues Revenues	217185000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	17733000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	19944000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	20034000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	18787000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	13546000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	15190000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	16587000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	15748000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2018Q1	us-gaap	Revenues Revenues	186960000	USD
CY2018Q2	us-gaap	Revenues Revenues	197024000	USD
CY2018Q3	us-gaap	Revenues Revenues	199649000	USD
CY2018Q4	us-gaap	Revenues Revenues	203961000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	13594000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	18223000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	18993000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	19538000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	10331000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	13702000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	15257000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	15737000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29

Files In Submission

Name	View Source	Status
0001437749-20-003828-index-headers.html	Edgar Link	pending
0001437749-20-003828-index.html	Edgar Link	pending
0001437749-20-003828.txt	Edgar Link	pending
0001437749-20-003828-xbrl.zip	Edgar Link	pending
ex_172885.htm	Edgar Link	pending
ex_172886.htm	Edgar Link	pending
ex_172887.htm	Edgar Link	pending
ex_172888.htm	Edgar Link	pending
ex_172889.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
mrtn-20191231.xsd	Edgar Link	pending
mrtn-20191231_cal.xml	Edgar Link	unprocessable
mrtn-20191231_def.xml	Edgar Link	unprocessable
mrtn-20191231_lab.xml	Edgar Link	unprocessable
mrtn-20191231_pre.xml	Edgar Link	unprocessable
mrtn20191231_10k.htm	Edgar Link	pending
mrtn20191231_10kimg001.gif	Edgar Link	pending
mrtn20191231_10k_htm.xml	Edgar Link	completed
R1.htm	Edgar Link	pending
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R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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2019 Q4 Form 10-K Financial Statement

#000143774920003828 Filed on February 28, 2020

Income Statement

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Facts In Submission

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$MRTN MARTEN TRANSPORT LTD Stock $mrtn

2019 Q4 Form 10-K Financial Statement

#000143774920003828 Filed on February 28, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MRTN
MARTEN TRANSPORT LTD Stock $mrtn