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DERIVATIVE FINANCIAL INSTRUMENTS | 12 Months Ended
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Dec. 31, 2020
DERIVATIVE FINANCIAL INSTRUMENTS |
DERIVATIVE FINANCIAL INSTRUMENTS | 16 DERIVATIVE FINANCIAL INSTRMENTS As of December 31, 2019 and 2020, the Company had outstanding interest rate swap contracts with notional amounts of US$118,500 and nil, respectively. The following table reflects the fair values of derivatives included in the consolidated balance sheets as of December 31, 2019: ​
​ | ​ | ​ | ​ | ​
​ | ​ | Consolidated balance | ​ | ​
​ |  | sheets location |  | As of December 31, 2019
​ | ​ | ​ | ​ | ​
Interest rate swap contracts (not designated as hedging instruments) | ​ | Accrued expenses and other payables | ​ | 351
Interest rate swap contracts (not designated as hedging instruments) | ​ | Other long-term liabilities | ​ | 10,408
​ The following table reflects the location in the consolidated statements of operations and the amount of realized and unrealized gains/(losses) recognized for the derivative contracts not designated as hedging instruments for the years ended December 31, 2018, 2019 and 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Consolidated | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | statements of | ​ | Years ended December 31,
​ | ​ | operations location |  | 2018 |  | 2019 |  | 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap contracts (not designated as hedging instruments) — realized loss |  | Interest expenses |  | (75) |  | (1,652) |  | (19,814)
Interest rate swap contracts (not designated as hedging instruments) — unrealized (loss) gain |  | Interest expenses |  | 156 |  | (10,606) |  | 10,039
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ |  | 81 |  | (12,258) |  | (9,775)
​

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -URI http://asc.fasb.org/topic&trid=2229140 + Details
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