Long-Term Debt - Additional Information (Details)	12 Months Ended
Dec. 31, 2021 USD ($) term_loan credit_facility vessel valuator	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 45,400,000	$ 32,000,000
Total principal	324,506,000	$ 249,568,000
Minimum liquidity covenant requirement	$ 35,000,000
Minimum liquidity as a percentage of consolidated debt covenant requirement	5.00%
Interest at a weighted-average fixed rate	2.50%	2.60%
Aggregate annual long-term principal repayments, 2020	$ 15,800,000
Aggregate annual long-term principal repayments, 2021	107,400,000
Aggregate annual long-term principal repayments, 2022	$ 201,300,000
Secured Debt
Debt Instrument [Line Items]
Number of debt instruments \| term_loan	1
Total principal	$ 53,339,000	$ 64,568,000
Revolving Credit Facilities
Debt Instrument [Line Items]
Number of debt instruments \| credit_facility	1
Line of Credit Facility, Maximum Borrowing Capacity	$ 344,900,000	438,400,000
Undrawn amount of revolving credit facility	73,700,000	253,400,000
Long-term Debt, Revolving Credit Facility, Decrease in Amount Available Next Twelve Months	78,300,000
Long-term Debt, Revolving Credit Facility, Decrease in Amount Available Year Two	65,300,000
Long-term Debt, Revolving Credit Facility, Decrease in Amount Available Year Three	201,300,000
Total principal	$ 271,167,000	$ 185,000,000
2020 Debt Facility Maturing in December 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral, Number of Vessels \| vessel	29
Debt covenant minimum hull coverage ratio	125.00%
Actual hull coverage ratio	249.00%
Term Loan Due 2023
Debt Instrument [Line Items]
Debt Instrument, Collateral, Number of Vessels \| vessel	4
Debt covenant minimum hull coverage ratio	125.00%
Actual hull coverage ratio	186.00%
Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Number of Third Party Valuators \| valuator	2
Long-term Debt, Term	6 months
Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.40%
London Interbank Offered Rate (LIBOR) [Member] \| Secured Debt
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.25%
London Interbank Offered Rate (LIBOR) [Member] \| Revolving Credit Facilities
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.40%	2.40%
London Interbank Offered Rate (LIBOR) [Member] \| Minimum \| Secured Debt
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.25%

The actual hull coverage ratio of the Company as at period end.

No definition available.

Name:	tnk_ActualHullCoverageRatio
Namespace Prefix:	tnk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum liquidity required by covenants of certain debt currently held by the company. Liquidity is defined as cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity.

+ References

No definition available.

+ Details

Name:	tnk_DebtCovenantMinimumFreeLiquidityAndUndrawnRevolvingCreditLine
Namespace Prefix:	tnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The minimum free liquidity and undrawn revolving credit line required by covenants of certain debt currently held by the Company, as a percentage of total debt.

+ References

No definition available.

+ Details

Name:	tnk_DebtCovenantMinimumFreeLiquidityAndUndrawnRevolvingCreditLineAsPercentageOfDebt
Namespace Prefix:	tnk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum hull coverage ratio as required by certain covenants for debts held by the Company.

+ References

No definition available.

+ Details

Name:	tnk_DebtCovenantMinimumHullCoverageRatio
Namespace Prefix:	tnk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Collateral, Number of Vessels

+ References

No definition available.

+ Details

Name:	tnk_DebtInstrumentCollateralNumberofVessels
Namespace Prefix:	tnk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Long-term Debt, Revolving Credit Facility, Decrease in Amount Available Year One

+ References

No definition available.

+ Details

Name:	tnk_LongTermDebtRevolvingCreditFacilityDecreaseInAmountAvailableYearOne
Namespace Prefix:	tnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term Debt, Revolving Credit Facility, Decrease in Amount Available Year Three

+ References

No definition available.

+ Details

Name:	tnk_LongtermDebtRevolvingCreditFacilityDecreaseinAmountAvailableYearThree
Namespace Prefix:	tnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Long-term Debt, Revolving Credit Facility, Decrease in Amount Available Year Two

+ References

No definition available.

+ Details

Name:	tnk_LongtermDebtRevolvingCreditFacilityDecreaseinAmountAvailableYearTwo
Namespace Prefix:	tnk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of debt instruments.

+ References

No definition available.

+ Details

Name:	tnk_NumberOfDebtInstruments
Namespace Prefix:	tnk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Third Party Valuators

+ References

No definition available.

+ Details

Name:	tnk_NumberOfThirdPartyValuators
Namespace Prefix:	tnk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1E
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123465755&loc=d3e1835-112601

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_LongTermDebtTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

Name:	us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=tnk_A2020DebtFacilityMaturinginDecember2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=tnk_TermLoanDue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: