BASIS OF PRESENTATION (Policies)	3 Months Ended
Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying unaudited condensed consolidated financial statements of Knoll, Inc. (the “Company”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and any partially-owned subsidiaries that the Company has the ability to control. All significant intercompany balances and transactions have been eliminated in consolidation. Operating results for the three month period ended March 31, 2020 are not necessarily indicative of the results that may be expected for the year ended December 31, 2020. The condensed consolidated balance sheet of the Company, as of December 31, 2019, has been derived from the Company’s audited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. Certain reclassifications have been made to prior year balances to conform to current year presentation in the condensed consolidated statement of cash flows. During the fourth quarter of 2019, the Company aligned the consolidation of certain of its foreign subsidiaries in the consolidated financial statements which previously included results on a one-month reporting lag. The Company has determined that the effect of this change is not material to the condensed consolidated financial statements for the prior period presented and therefore has not presented retrospective application of this change. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.
Use of Estimates	U.S. GAAP requires management to make estimates and assumptions that affect reported amounts and disclosures. These estimates and assumptions take into account historical and forward looking factors that the Company believes are reasonable, including, but not limited to, the potential impacts arising from the coronavirus pandemic of 2019 (“COVID-19”) and public and private sector policies and initiatives aimed at reducing its transmission. As the extent and duration of the impacts of COVID-19 remain unclear, the Company’s estimates and assumptions may evolve as conditions change. Actual results could differ significantly from those estimates. Examples of significant estimates include the allowance for credit losses, the recoverability of property, plant and equipment, the incremental borrowing rate for lease liabilities, the recoverability of intangible assets and other long-lived assets, fair value measurements, including those related to financial instruments, goodwill and intangible assets, valuation allowances on tax assets, pension and postretirement benefit obligations, contingencies and the identification and valuation of assets acquired and liabilities assumed in connection with business combinations.
Credit Losses	Subsequent to January 1, 2020, accounts receivable are recorded at amortized cost less an allowance for expected credit losses. The Company maintains an allowance for credit losses for the expected failure or inability of its customers to make required payments. The Company recognizes the allowance for expected credit losses at inception and reassesses quarterly based on management’s expectation of the asset’s collectability. The allowance is based on multiple factors including historical experience with bad debts, the credit quality of the customer base, the aging of such receivables and current macroeconomic conditions, as well as management’s expectations of conditions in the future. The Company’s allowance for uncollectible accounts receivable is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics. Management analyzes receivables based on the credit quality indicators and shared risk characteristics of our dealers and other customers. Management stratifies the dealer population generally by the level of their purchase activity, mainly recurring purchasers compared to non-recurring purchasers, as well as the financial strength of the dealer. Management also stratifies receivables based on government and corporate purchasers with common risk characteristics. Management considers multiple factors, including payment history, frequency of purchases and financial strength of the purchaser to determine the reserve needed..
Accounting Standards Adopted	In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides practical expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply to contracts and hedging relationships that reference the London Interbank Offered Rate (“LIBOR”) or other reference rate expected to be discontinued due to reference rate reform. The amendments in this ASU are effective immediately and may be applied to impacted contracts and hedges prospectively through December 31, 2022. The adoption of the ASU had no impact on the Company’s condensed consolidated financial statements for the period ended March 31, 2020. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820), which amends the disclosure requirements for recurring and nonrecurring fair value measurements by removing, modifying and adding certain disclosures. The Company adopted ASU 2018-13 as of January 1, 2020. The adoption of this ASU did not have a significant impact on the Company’s condensed consolidated financial statements or disclosures. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 replaces the incurred loss impairment methodology for measuring and recognizing credit losses with a methodology that reflects expected credit losses, which requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company adopted ASU 2016-13 as of January 1, 2020. The adoption of this ASU did not have a material impact on the Company’s condensed consolidated financial statements.

BASIS OF PRESENTATION (Policies)

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying unaudited condensed consolidated financial statements of Knoll, Inc. (the “Company”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and any partially-owned subsidiaries that the Company has the ability to control. All significant intercompany balances and transactions have been eliminated in consolidation. Operating results for the three month period ended March 31, 2020 are not necessarily indicative of the results that may be expected for the year ended December 31, 2020.

The condensed consolidated balance sheet of the Company, as of December 31, 2019, has been derived from the Company’s audited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements.

Certain reclassifications have been made to prior year balances to conform to current year presentation in the condensed consolidated statement of cash flows.

During the fourth quarter of 2019, the Company aligned the consolidation of certain of its foreign subsidiaries in the consolidated financial statements which previously included results on a one-month reporting lag. The Company has determined that the effect of this change is not material to the condensed consolidated financial statements for the prior period presented and therefore has not presented retrospective application of this change.

For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.

Use of Estimates

U.S. GAAP requires management to make estimates and assumptions that affect reported amounts and disclosures. These estimates and assumptions take into account historical and forward looking factors that the Company believes are reasonable, including, but not limited to, the potential impacts arising from the coronavirus pandemic of 2019 (“COVID-19”) and public and private sector policies and initiatives aimed at reducing its transmission. As the extent and duration of the impacts of COVID-19 remain unclear, the Company’s estimates and assumptions may evolve as conditions change. Actual results could differ significantly from those estimates.

Examples of significant estimates include the allowance for credit losses, the recoverability of property, plant and equipment, the incremental borrowing rate for lease liabilities, the recoverability of intangible assets and other long-lived assets, fair value measurements, including those related to financial instruments, goodwill and intangible assets, valuation allowances on tax assets, pension and postretirement benefit obligations, contingencies and the identification and valuation of assets acquired and liabilities assumed in connection with business combinations.

Credit Losses

Subsequent to January 1, 2020, accounts receivable are recorded at amortized cost less an allowance for expected credit losses. The Company maintains an allowance for credit losses for the expected failure or inability of its customers to make required payments. The Company recognizes the allowance for expected credit losses at inception and reassesses quarterly based on management’s expectation of the asset’s collectability. The allowance is based on multiple factors including historical experience with bad debts, the credit quality of the customer base, the aging of such receivables and current macroeconomic conditions, as well as management’s expectations of conditions in the future. The Company’s allowance for uncollectible accounts receivable is based on management’s assessment of the collectability of assets pooled together with similar risk characteristics.

Management analyzes receivables based on the credit quality indicators and shared risk characteristics of our dealers and other customers. Management stratifies the dealer population generally by the level of their purchase activity, mainly recurring purchasers compared to non-recurring purchasers, as well as the financial strength of the dealer. Management also stratifies receivables based on government and corporate purchasers with common risk characteristics. Management considers multiple factors, including payment history, frequency of purchases and financial strength of the purchaser to determine the reserve needed..

Accounting Standards Adopted

In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides practical expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply to contracts and hedging relationships that reference the London Interbank Offered Rate (“LIBOR”) or other reference rate expected to be discontinued due to reference rate reform. The amendments in this ASU are effective immediately and may be applied to impacted contracts and hedges prospectively through December 31, 2022. The adoption of the ASU had no impact on the Company’s condensed consolidated financial statements for the period ended March 31, 2020.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820), which amends the disclosure requirements for recurring and nonrecurring fair value measurements by removing, modifying and adding certain disclosures. The Company adopted ASU 2018-13 as of January 1, 2020. The adoption of this ASU did not have a significant impact on the Company’s condensed consolidated financial statements or disclosures.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 replaces the incurred loss impairment methodology for measuring and recognizing credit losses with a methodology that reflects expected credit losses, which requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company adopted ASU 2016-13 as of January 1, 2020. The adoption of this ASU did not have a material impact on the Company’s condensed consolidated financial statements.