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Derivatives - Summary of Derivative Interest Rate Swap Contract List (Details) - 12 months ended Dec. 31, 2022
$ in Thousands, $ in Thousands, ₩ in Millions
KRW (₩)
AUD ($)
USD ($)
Designated as Hedging Instrument | Interest rate swap 1 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Export-Import Bank of Korea    
Derivative, Term of Contract 2015~2031    
Contract Interest rate Pay 2.67%    
Contract Interest rate Receive 6M USD Libor    
Contract amount | $     $ 15,893
Designated as Hedging Instrument | Interest rate swap 2 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty ING Bank    
Derivative, Term of Contract 2015~2031    
Contract Interest rate Pay 2.67%    
Contract Interest rate Receive 6M USD Libor    
Contract amount | $     7,861
Designated as Hedging Instrument | Interest rate swap 3 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty BNP Paribas    
Derivative, Term of Contract 2015~2031    
Contract Interest rate Pay 2.67%    
Contract Interest rate Receive 6M USD Libor    
Contract amount | $     7,861
Designated as Hedging Instrument | Interest rate swap 4 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty BNP Paribas    
Derivative, Term of Contract 2009~2027    
Contract Interest rate Pay 4.16%    
Contract Interest rate Receive 6M USD Libor    
Contract amount | $     51,891
Designated as Hedging Instrument | Interest rate swap 5 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty KFW    
Derivative, Term of Contract 2009~2027    
Contract Interest rate Pay 4.16%    
Contract Interest rate Receive 6M USD Libor    
Contract amount | $     51,891
Designated as Hedging Instrument | Interest rate swap 6 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Export-Import Bank of Korea    
Derivative, Term of Contract 2016~2036    
Contract Interest rate Pay 3.00%    
Contract Interest rate Receive 6M USD Libor    
Contract amount | $     $ 66,124
Not Designated as Hedging Instrument | Interest rate swap 1 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty [1] Nomura    
Derivative, Term of Contract [1] 2018~2038    
Contract Interest rate Pay [1] 2.56    
Contract Interest rate Receive [1] 3.75    
Contract amount [1] ₩ 30,000    
Not Designated as Hedging Instrument | Interest rate swap 2 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2018~2023    
Contract Interest rate Pay 2.15    
Contract Interest rate Receive 3M CD + 0.19    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 3 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2018~2023    
Contract Interest rate Pay 2.17    
Contract Interest rate Receive 3M CD + 0.19    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 4 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2018~2023    
Contract Interest rate Pay 2.03    
Contract Interest rate Receive 3M CD + 0.21    
Contract amount ₩ 150,000    
Not Designated as Hedging Instrument | Interest rate swap 5 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2019~2024    
Contract Interest rate Pay 1.87    
Contract Interest rate Receive 3M CD + 0.13    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 6 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Shinhan Bank    
Derivative, Term of Contract 2021~2025    
Contract Interest rate Pay 2.32    
Contract Interest rate Receive 3M CD + 0.43    
Contract amount ₩ 100,000    
Not Designated as Hedging Instrument | Interest rate swap 7 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.02    
Contract Interest rate Receive 3M CD + 0.61    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 8 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.04    
Contract Interest rate Receive 3M CD + 0.58    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 9 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.38    
Contract Interest rate Receive 3M CD + 0.59    
Contract amount ₩ 250,000    
Not Designated as Hedging Instrument | Interest rate swap 10 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Nomura    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.55    
Contract Interest rate Receive 3M CD + 0.60    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 11 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Shinhan Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.53    
Contract Interest rate Receive 3M CD + 0.55    
Contract amount ₩ 150,000    
Not Designated as Hedging Instrument | Interest rate swap 12 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.70    
Contract Interest rate Receive 3M CD + 0.59    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 13 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Nomura    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.89    
Contract Interest rate Receive 3M CD + 0.67    
Contract amount ₩ 300,000    
Not Designated as Hedging Instrument | Interest rate swap 14 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.93    
Contract Interest rate Receive 3M CD + 0.67    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 15 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Nomura    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 3.80    
Contract Interest rate Receive 3M CD + 0.68    
Contract amount ₩ 200,000    
Not Designated as Hedging Instrument | Interest rate swap 16 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Nomura    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 4.04    
Contract Interest rate Receive 3M CD + 0.60    
Contract amount ₩ 300,000    
Not Designated as Hedging Instrument | Interest rate swap 17 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 4.68    
Contract Interest rate Receive 3M CD + 1.04    
Contract amount ₩ 100,000    
Not Designated as Hedging Instrument | Interest rate swap 18 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Hana Bank    
Derivative, Term of Contract 2022~2027    
Contract Interest rate Pay 5.45    
Contract Interest rate Receive 3M CD + 1.20    
Contract amount ₩ 100,000    
Not Designated as Hedging Instrument | Interest rate swap 19 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Nomura    
Derivative, Term of Contract 2017~2032    
Contract Interest rate Pay 3M Libor + 2.22    
Contract Interest rate Receive 2.60    
Contract amount ₩ 52,457    
Not Designated as Hedging Instrument | Interest rate swap 20 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Nomura    
Derivative, Term of Contract 2017~2032    
Contract Interest rate Pay 3M Libor + 2.24    
Contract Interest rate Receive 2.62    
Contract amount ₩ 59,423    
Not Designated as Hedging Instrument | Interest rate swap 21 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty [2] Nomura    
Derivative, Term of Contract [2] 2021~2041    
Contract Interest rate Pay [2] 1.84    
Contract Interest rate Receive [2] 2.60    
Contract amount [2] ₩ 30,000    
Not Designated as Hedging Instrument | Interest rate swap 22 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty [3] Nomura    
Derivative, Term of Contract [3] 2021~2041    
Contract Interest rate Pay [3] 1.87    
Contract Interest rate Receive [3] 2.38    
Contract amount [3] ₩ 50,000    
Not Designated as Hedging Instrument | Interest rate swap 23 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty ANZ    
Derivative, Term of Contract 2022 - 2025    
Contract Interest rate Pay 0.48    
Contract Interest rate Receive 3.33    
Contract amount | $   $ 540  
Not Designated as Hedging Instrument | Interest rate swap 24 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty DBS Bank    
Derivative, Term of Contract 2022 - 2025    
Contract Interest rate Pay 0.48    
Contract Interest rate Receive 3.33    
Contract amount | $   540  
Not Designated as Hedging Instrument | Interest rate swap 25 contracts      
Disclosure of Derivative Interest rate swap contract detail list [Line Items]      
Counterparty Societe Generale    
Derivative, Term of Contract 2022 - 2025    
Contract Interest rate Pay 0.48    
Contract Interest rate Receive 3.28    
Contract amount | $   $ 540  
[1] 2.56% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CD + 0.10% is applied thereafter. Depending on the counterparty exercising the right, the contract may be early settled on the same date every year from June 15, 2023.
[2] 1.84% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT + 0.35% is applied thereafter.
[3] 1.87% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT + 0.35% is applied thereafter.