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Fair value measurements (goodwill and non-recurring asset impairment analyses) (Details) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) reporting_units | Dec. 31, 2020 USD ($) | Feb. 29, 2020 USD ($)
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Goodwill impairment charges |  | $ 67,673 |  |
Goodwill | $ 736,862 |  | $ 736,844 |
Total impairment charge | $ 0 | $ 90,330 |  |
Reporting units for which quantitative analysis completed [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Number of reporting units | reporting_units |  | 2 |  |
Promotional Solutions reporting unit [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Goodwill impairment charges |  | $ 63,356 |  |
Goodwill |  | 62,785 |  |
Cloud Solutions Web Hosting reporting unit [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Goodwill impairment charges |  | 4,317 |  |
Non-recurring fair value measurement [Member] | Assets held for sale [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Asset impairment charges |  | 2,227 |  |
Other assets |  | 1,412 |  |
Non-recurring fair value measurement [Member] | Small business distributors [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Estimated fair value, intangibles |  |  |  | $ 7,622
Non-recurring fair value measurement [Member] | Small business distributors [Member] | Measurement input, revenue growth rate [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Intangibles fair value inputs |  |  |  | 0.00%
Non-recurring fair value measurement [Member] | Small business distributors [Member] | Measurement input, gross margin growth rate [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Intangibles fair value inputs |  |  |  | 1.90%
Non-recurring fair value measurement [Member] | Small business distributors [Member] | Measurement input, discount rate [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Intangibles fair value inputs |  |  |  | 11.00%
Non-recurring fair value measurement [Member] | Amortizable intangibles [Member] | Cloud Solutions Web Hosting reporting unit [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Asset impairment charges |  | $ 17,678 |  |
Non-recurring fair value measurement [Member] | Amortizable intangibles [Member] | Cloud Solutions Web Hosting reporting unit [Member] | Measurement input, revenue growth rate [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Intangibles fair value inputs |  | (31.00%) |  |
Non-recurring fair value measurement [Member] | Amortizable intangibles [Member] | Cloud Solutions Web Hosting reporting unit [Member] | Measurement input, gross margin growth rate [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Intangibles fair value inputs |  | (5.20%) |  |
Non-recurring fair value measurement [Member] | Amortizable intangibles [Member] | Cloud Solutions Web Hosting reporting unit [Member] | Measurement input, discount rate [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Intangibles fair value inputs |  | 9.00% |  |
Non-recurring fair value measurement [Member] | Customer lists/relationships [Member] | Small business distributors [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Asset impairment charges |  | $ 2,752 |  |
Non-recurring fair value measurement [Member] | Customer lists/relationships [Member] | Cloud Solutions Web Hosting reporting unit [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Asset impairment charges |  | 8,397 |  |
Non-recurring fair value measurement [Member] | Internal-use software [Member] | Cloud Solutions Web Hosting reporting unit [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Asset impairment charges |  | 6,932 |  |
Estimated fair value, intangibles |  | 2,172 |  |
Non-recurring fair value measurement [Member] | Other intangible assets [Member] | Cloud Solutions Web Hosting reporting unit [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Asset impairment charges |  | 2,349 |  |
Non-recurring fair value measurement [Member] | Significant unobservable inputs (Level 3) [Member] | Assets held for sale [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Other assets |  | 1,412 |  |
Non-recurring fair value measurement [Member] | Significant unobservable inputs (Level 3) [Member] | Small business distributors [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Estimated fair value, intangibles |  |  |  | $ 7,622
Non-recurring fair value measurement [Member] | Significant unobservable inputs (Level 3) [Member] | Internal-use software [Member] | Cloud Solutions Web Hosting reporting unit [Member] |  |  |  |
Goodwill impairment and non-recurring fair value measurements [Line Items] |  |  |  |
Estimated fair value, intangibles |  | $ 2,172 |  |

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