Change In Accounting Estimate, Increase (Decrease) Depreciation Expense

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Name:	acel_ChangeInAccountingEstimateIncreaseDecreaseDepreciationExpense
Namespace Prefix:	acel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Change In Accounting Estimate, Increase (Decrease) Net Income (Loss)

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+ Details

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Namespace Prefix:	acel_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Change In Accounting Estimate, Increase (Decrease) To Net Loss Per Share

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Namespace Prefix:	acel_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- 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.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Period Type:

- Details

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Namespace Prefix:
Data Type:	na
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Summary of Significant Accounting Policies - Change in estimate (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2020
Service Life
Change in Accounting Estimate [Line Items]
Decrease to depreciation expense			$ 7,704
Increase to net income/decrease to net loss			$ 3,345
Increase to income per share/decrease to loss per share (in usd per share)			$ 0.04
Video game terminals and equipment
Change in Accounting Estimate [Line Items]
Useful life			10 years
Video game terminals and equipment \| Service Life
Change in Accounting Estimate [Line Items]
Useful life	7 years	10 years