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ACQUISITIONS AND DIVESTITURES (NARRATIVE) (Details) |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) employee | Apr. 01, 2022 USD ($) | Apr. 08, 2021 USD ($) | Nov. 04, 2020 USD ($) | Sep. 30, 2020 USD ($) | Aug. 05, 2020 USD ($) | Jun. 30, 2020 USD ($) | Feb. 07, 2020 USD ($) | Apr. 30, 2022 USD ($) | Apr. 30, 2021 USD ($) | Dec. 31, 2022 USD ($) employee | Sep. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2022 USD ($) employee | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2019 USD ($) | Oct. 26, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Entity Number of Employees | employee | 69,400 |  |  |  |  |  |  |  |  |  | 69,400 |  |  |  |  |  |  |  | 69,400 |  |  |  |  |
Other liabilities, noncurrent | $ 66,304,000 |  |  |  |  |  |  |  |  |  | $ 66,304,000 |  | $ 79,827,000 |  |  |  |  |  | $ 66,304,000 | $ 79,827,000 |  |  |  |
Redeemable noncontrolling interest | 55,645,000 |  |  |  |  |  |  |  |  |  | 55,645,000 |  | 56,316,000 |  |  |  | $ 52,976,000 |  | 55,645,000 | 56,316,000 | $ 52,976,000 |  | $ 48,923,000 |
Contingent Consideration, at fair value | 5,916,000 |  |  |  |  |  |  |  |  |  | 5,916,000 |  | 9,600,000 |  |  |  | 18,032,000 |  | 5,916,000 | 9,600,000 | 18,032,000 |  |  |
Business Combination Contingent Consideration Liability | 5,916,000 |  |  |  |  |  |  |  |  |  | 5,916,000 |  | 9,600,000 |  |  |  | 18,032,000 |  | 5,916,000 | 9,600,000 | 18,032,000 |  |  |
Contingent Consideration Receivable Imputed Interest Benefit and Other Adjustments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,646,000) |  |  |  |  |
Business Combination, Contingent Consideration, Asset | $ 5,724,000 |  |  |  |  |  |  |  |  |  | $ 5,724,000 |  |  |  |  |  |  |  | 5,724,000 |  |  |  |  |
Revenue of Acquirees since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 112,300,000 | 147,700,000 | 19,400,000 |  |  |
Income (loss) from operations of Acquirees since Acquisition Date, Actual |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000.0 | 9,800,000 | 1,900,000 |  |  |
Sales Revenue Services Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,443,707,000 | 2,273,062,000 | 1,949,248,000 |  |  |
Net income attributable to TTEC stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 103,240,000 | 140,970,000 | 118,648,000 |  |  |
Business Acquisition, Pro Forma Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,485,700,000 | 2,447,300,000 | 2,135,600,000 |  |  |
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 106,600,000 | 156,300,000 | 115,600,000 |  |  |
(Gain) Loss on dissolution of subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | (19,905,000) |  |  |
Foreign Subsidiary 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Gain) Loss on dissolution of subsidiary |  |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Subsidiary 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(Gain) Loss on dissolution of subsidiary |  |  |  |  | $ 17,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TTEC Digital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales Revenue Services Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 471,523,000 | 414,104,000 | 306,985,000 |  |  |
TTEC Engage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales Revenue Services Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,972,184,000 | 1,858,958,000 | 1,642,263,000 |  |  |
Accounting Standards Update 2021-08 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Deferred Revenue |  |  |  |  |  |  |  |  |  |  |  |  | (4,900,000) |  |  |  |  |  |  |  |  |  |  |
Avtex |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ownership percentage |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Serendebyte |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ownership percentage | 70.00% |  |  |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  | 70.00% |  |  |  |  |
FCR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ownership percentage | 70.00% |  |  |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  | 70.00% |  |  |  |  |
Avtex |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Acquisition |  |  | Apr. 08, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Acquired Entity |  |  | Avtex is an end-to-end customer experience and CXaaS solutions provider with offerings in Genesys and Microsoft cloud solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses |  |  | $ 499,946,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Base purchase price to acquire businesses |  |  | 490,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  | $ 499,946,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |
Avtex | Accounting Standards Update 2021-08 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales Revenue Services Net |  |  |  |  |  |  |  |  |  |  |  |  | 3,400,000 |  |  |  |  |  |  |  |  |  |  |
Avtex | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  | 9 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Avtex | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Avtex | Intellectual Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Acquisition |  | Apr. 01, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Assets Acquired | $ 218,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase Decrease In Fair Value Assets Acquired |  |  |  |  |  |  |  |  |  |  | $ (52,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses |  | $ 142,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  | 142,420,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent Consideration, at fair value | 5,916,000 | $ 8,800,000 |  |  |  |  |  |  |  |  | 5,916,000 |  | 0 |  |  |  |  |  | $ 5,916,000 | 0 |  |  |  |
Number Of Contingent Payments |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination Contingent Consideration Liability | $ 5,916,000 | $ 8,800,000 |  |  |  |  |  |  |  |  | 5,916,000 |  | 0 |  |  |  |  |  | $ 5,916,000 | 0 |  |  |  |
Increase (decrease) in contingent consideration payable |  |  |  |  |  |  |  |  |  |  | $ 500,000 | $ 2,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Risk Free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input |  | 1.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Expected forecast volatility rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Discount Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input | 19.3 |  |  |  |  |  |  |  |  |  | 19.3 |  |  |  |  |  |  |  | 19.3 |  |  |  |  |
Faneuil | Measurement Input, EBITDA Multiple [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input |  | 19.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Measurement Input, Revenue Multiple [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input |  | 7.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquired Receivable, Fair Value |  | $ 10,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Other Noncurrent Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Assets Acquired |  | $ 270,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Other Noncurrent Liabilities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent Consideration, at fair value | $ 5,900,000 |  |  |  |  |  |  |  |  |  | $ 5,900,000 |  |  |  |  |  |  |  | $ 5,900,000 |  |  |  |  |
Business Combination Contingent Consideration Liability | 5,900,000 |  |  |  |  |  |  |  |  |  | 5,900,000 |  |  |  |  |  |  |  | 5,900,000 |  |  |  |  |
Faneuil | TTEC Engage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Acquired Entity |  | On April 1, 2022, the Company completed an asset acquisition through its subsidiary TTEC Government Solutions LLC, of certain public sector citizen experience contracts in the transportation infrastructure and healthcare exchange industries from Faneuil, Inc., a subsidiary of ALJ Regional Holdings, Inc., (“the Faneuil Transaction”). The business is operated as part of the TTEC Engage segment and was fully consolidated into the financial statements of TTEC. The Faneuil Transaction was recorded as a business combination under ASC 805, Business Combinations, with identifiable assets acquired and liabilities assumed recorded at their estimated fair values as of the acquisition date. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Faneuil receivable [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent Consideration Receivable Imputed Interest Benefit and Other Adjustments |  |  |  |  |  |  |  |  |  |  | (200,000) | $ (4,400,000) |  |  |  |  |  |  | (4,646,000) |  |  |  |  |
Business Combination, Contingent Consideration, Asset | 5,724,000 |  |  |  |  |  |  |  |  |  | 5,724,000 |  |  |  |  |  |  |  | 5,724,000 |  |  |  |  |
Faneuil receivable [Member] | Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquired Receivable, Fair Value | 5,700,000 |  |  |  |  |  |  |  |  |  | 5,700,000 |  |  |  |  |  |  |  | 5,700,000 |  |  |  |  |
VoiceFoundry US |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Acquisition |  |  |  |  |  | Aug. 05, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Acquired Entity |  |  |  |  |  | VoiceFoundry is a preferred Amazon Connect cloud contact center service and implementation partner |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses |  |  |  |  |  | $ 34,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |
Future Value of Liabilities Incurred From Business Acquisitions | 10,900,000 |  |  |  |  | $ 7,400,000 |  |  |  |  | 10,900,000 |  |  |  |  |  |  |  | 10,900,000 |  |  |  |  |
Contingent Consideration, at fair value | 0 |  |  |  |  |  |  |  |  |  | 0 |  | 7,414,000 |  |  |  | 14,085,000 |  | 0 | 7,414,000 | 14,085,000 |  |  |
Business Combination Contingent Consideration Liability | $ 0 |  |  |  |  |  |  |  |  |  | $ 0 |  | 7,414,000 |  |  |  | 14,085,000 |  | $ 0 | 7,414,000 | 14,085,000 |  |  |
Increase (decrease) in contingent consideration payable |  |  |  |  |  |  |  |  | $ (7,400,000) | $ (7,400,000) |  |  | (25,000) |  | $ (200,000) | (500,000) | 3,200,000 |  |  |  |  |  |  |
VoiceFoundry US | Risk Free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input | 2.6 |  |  |  |  |  |  |  |  |  | 2.6 |  |  |  |  |  |  |  | 2.6 |  |  |  |  |
VoiceFoundry US | Expected forecast volatility rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input | 47 |  |  |  |  |  |  |  |  |  | 47 |  |  |  |  |  |  |  | 47 |  |  |  |  |
VoiceFoundry US | Discount Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input | 23.1 |  |  |  |  |  |  |  |  |  | 23.1 |  |  |  |  |  |  |  | 23.1 |  |  |  |  |
VoiceFoundry US | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry US | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry US | VoiceFoundry US |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Voting Interests Acquired |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry ASEAN |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Acquisition |  |  |  | Nov. 04, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses |  |  |  | $ 15,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |  |  |  |  |
Future Value of Liabilities Incurred From Business Acquisitions |  |  |  | 2,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent Consideration, at fair value | $ 0 |  |  |  |  |  |  |  |  |  | $ 0 |  | 2,186,000 |  |  |  | 3,947,000 |  | $ 0 | 2,186,000 | 3,947,000 |  |  |
Business Combination Contingent Consideration Liability | $ 0 |  |  |  |  |  |  |  |  |  | $ 0 |  | 2,186,000 |  |  |  | 3,947,000 |  | $ 0 | $ 2,186,000 | $ 3,947,000 |  |  |
Increase (decrease) in contingent consideration payable |  |  |  |  |  |  |  |  | $ (2,200,000) | $ (2,200,000) |  |  | $ (100,000) |  | $ 100,000 | $ (400,000) | $ 1,200,000 |  |  |  |  |  |  |
VoiceFoundry ASEAN | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future Value of Liabilities Incurred From Business Acquisitions |  |  |  | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry ASEAN | Risk Free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input |  |  |  | 1.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry ASEAN | Expected forecast volatility rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input |  |  |  | 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry ASEAN | Discount Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business combination contingent consideration measurement input | 18.4 |  |  | 18.4 |  |  |  |  |  |  | 18.4 |  |  |  |  |  |  |  | 18.4 |  |  |  |  |
VoiceFoundry ASEAN | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry ASEAN | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VoiceFoundry ASEAN | VoiceFoundry ASEAN |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Voting Interests Acquired |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Serendebyte |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Acquisition |  |  |  |  |  |  |  | Feb. 07, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Acquired Entity |  |  |  |  |  |  |  | Serendebyte Inc., a Delaware corporation (“the Serendebyte Transaction”). Serendebyte is an autonomous customer experience and intelligent automation solutions provider based in India, the United States, and Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses |  |  |  |  |  |  |  | $ 9,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 800,000 |  |  |  |  |  |
Cash balance retained |  |  |  |  |  |  |  | 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redeemable noncontrolling interest |  |  |  |  |  |  |  | $ 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Serendebyte | Discount Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unobservable Measurement Input, Uncertainty, Description |  |  |  |  |  |  |  | 35% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Serendebyte | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Serendebyte | Trade Names [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Serendebyte | Serendebyte |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FCR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Oct. 26, 2019 |  |  |  |  |
Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70.00%
Total purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22,300,000 |  |
FCR | FCR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |

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