Value of input used to measure fair value of intangible assets.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

+ References

No definition available.

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- Definition

The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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- Definition

Amount of fair value of reporting unit in excess of carrying amount.

+ References

No definition available.

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- Definition

Percentage of fair value of reporting unit in excess of carrying amount.

+ References

No definition available.

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Fair value measurements (annual impairment analyses) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) reporting_units	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Jul. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jul. 31, 2017 USD ($)
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Goodwill	$ 1,125,954		$ 1,125,954		$ 1,130,934
Goodwill impairment charge			$ 78,188
Trade names [Member] \| Significant unobservable inputs (Level 3) [Member] \| Measurement input, royalty rate [Member] \| Non-recurring fair value measurement [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Intangibles fair value inputs				0.00%
Reporting units for which qualitative analysis completed [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Number of reporting units \| reporting_units	5
Reporting units for which qualitative analysis completed [Member] \| Minimum [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Excess of fair value over carrying value						$ 64,000
Excess of fair value over carrying value, percentage						50.00%
Reporting units for which qualitative analysis completed [Member] \| Maximum [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Excess of fair value over carrying value						$ 1,405,000
Excess of fair value over carrying value, percentage						314.00%
Reporting units for which quantitative analysis completed [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Number of reporting units \| reporting_units	2
Small Business Services Web Services [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Excess of fair value over carrying value				$ 63,000
Excess of fair value over carrying value, percentage				22.00%
Goodwill				$ 225,383
Small Business Services Indirect [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Goodwill impairment charge	$ 78,188
Small Business Services Indirect [Member] \| Trade names [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Asset impairment charges	$ 19,100
Small Business Services Safeguard [Member]
Schedule of goodwill and indefinite-lived intangibles [Line Items]
Goodwill impairment charge		$ 28,379