Debt and Debt Issuance Costs - Senior Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Oct. 20, 2023
Debt Instrument [Line Items]
Principal amount owed, current, net of unamortized discount and issuance costs	$ 496	$ 0
Principal amount owed, noncurrent, net of unamortized discount and issuance costs	$ 29,365	$ 41,918
Senior Notes
Debt Instrument [Line Items]
Debt instrument, senior notes, percentage	1.00%
7.75% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Senior notes	$ 24,200
Stated interest rate	7.75%		7.75%
9.50% Senior Notes
Debt Instrument [Line Items]
Stated interest rate	101.00%
9.50% Senior Notes \| October 15, 2026
Debt Instrument [Line Items]
Redemption price, percentage of principal amount redeemed	35.00%
Redemption price (as a percent)	109.50%
9.50% Senior Notes \| 2026
Debt Instrument [Line Items]
Redemption price (as a percent)	104.75%
9.50% Senior Notes \| 2027
Debt Instrument [Line Items]
Redemption price (as a percent)	102.375%
9.50% Senior Notes \| 2028 and Thereafter
Debt Instrument [Line Items]
Redemption price (as a percent)	100.00%
9.50% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Senior notes	$ 716,300
Stated interest rate	9.50%
Repurchase amount	$ 21,300
Repurchase amount, cash consideration	17,200
Interest payable	200
Gain on repurchase of debt instrument	2,900
Deferred debt issuance cost, writeoff	1,400
Principal amount owed, current	179,100
Principal amount owed, current, net of unamortized discount and issuance costs	173,400
Principal amount owed, noncurrent	157,200
Principal amount owed, noncurrent, net of unamortized discount and issuance costs	$ 152,100
Consolidated interest coverage ratio	2.5
Net debt to EBITDA ratio	3.0
9.50% Senior Notes \| Senior Notes \| To Be Repaid on October 15, 2026
Debt Instrument [Line Items]
Percent of principal amount to be paid	25.00%
9.50% Senior Notes \| Senior Notes \| To Be Repaid on October 15, 2027
Debt Instrument [Line Items]
Percent of principal amount to be paid	5.00%
9.50% Senior Notes \| Senior Notes \| To Be Repaid on October 15, 2028
Debt Instrument [Line Items]
Percent of principal amount to be paid	30.00%
9.50% Senior Notes \| Senior Notes \| October 15, 2026
Debt Instrument [Line Items]
Redemption price (as a percent)	100.00%
Debt instrument, treasury redemption price, percentage	0.50%
Six Point Two Five Percent Senior Notes due February 2025 \| Senior Notes
Debt Instrument [Line Items]
Stated interest rate	6.25%
Interest payable	$ 800
Repayment of debt	24,800
Repayments of long-term debt, cash consideration	$ 25,600

GRAN TIERRA ENERGY INC. 10-K