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SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2020
SIGNIFICANT ACCOUNTING POLICIES |
Property, Plant and Equipment | Property, plant and equipment, net in the Consolidated Balance Sheet is comprised of the following components: ​
​ | ​ | ​ | ​ | ​ | ​
​ | December 31,
​ | 2020 |  | 2019
Land | $ | 70,335 | ​ | $ | 71,676
Buildings |  | 433,823 | ​ |  | 427,165
Machinery and equipment |  | 902,581 | ​ |  | 856,272
​ |  | 1,406,739 | ​ |  | 1,355,113
Less accumulated depreciation |  | 884,647 | ​ |  | 825,769
Total | $ | 522,092 | ​ | $ | 529,344
Schedule of adopted accounting pronouncements | ​
​ | ​ | ​
Standard |  | Description
ASU No. 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Subtopic 715-20), issued August 2018. | ​ | ASU 2018-14 modifies disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The ASU also requires an entity to disclose the weighted-average interest crediting rates for cash balance plans and to explain the reasons for significant gains and losses related to changes in the benefit obligation. Refer to Note 12 to the consolidated financial statements for further details.
ASU No. 2018-13, Fair Value Measurement (Topic 944), issued August 2018. ​ | ​ | ASU 2018-13 eliminates, amends and adds disclosure requirements related to fair value measurements. The ASU removes disclosure requirements pertaining to the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels and the valuation processes for Level 3 fair value measurements. Refer to Note 16 to the consolidated financial statements for further details.
ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326), issued June 2016. | ​ | ASU 2016-13 modifies disclosure and measurement requirements related to credit losses. Topic 326 requires that an entity estimate impairment of trade receivables based on expected losses rather than incurred losses. The adoption did not have a material impact on the Company's consolidated financial statements.
ASU No. 2020-04, Reference Rate Reform (Topic 848), issued March 2020. | ​ | ASU 2020-04 provides temporary optional guidance to ease the financial reporting burden associated with the expected market transition from the London Inter-Bank Offer Rate ("LIBOR") to alternative reference rates. The Company adopted the ASU on March 12, 2020 and it is effective through December 31, 2022. As of December 31, 2020, the Company has not utilized any of the optional guidance, however, it will continue to assess the potential impact on the Company’s debt contracts and hedging relationships through the effective period.
Schedule of pending accounting pronouncements | ​
​ | ​ | ​
Standard |  | Description
ASU No. 2019-12, Income Taxes (Topic 740), issued December 2019. | ​ | ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. The ASU is effective January 1, 2021 and early adoption is permitted.

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