Amount of expenses associated with exit or disposal activities pursuant to an authorized plan, net of reversals.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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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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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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RESTRUCTURING AND INTEGRATION EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring and integration expense [Line Items]
Restructuring and integration expense	$ 23,356	$ 27,674	$ 17,497	$ 6,283	$ 7,406	$ 5,104	$ 6,371	$ 2,322	$ 74,810	$ 21,203	$ 9,130
Restructuring and integration accruals, total					3,461					3,461
Restructuring and integration accruals, current	3,459				3,320				3,459	3,320
Restructuring and integration accruals, non-current					141					141
Reportable business segments [Member] \| Small Business Services [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									49,634	10,837	4,775
Reportable business segments [Member] \| Financial Services [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									20,879	10,087	3,950
Reportable business segments [Member] \| Direct Checks [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									4,297	279	405
Total cost of revenue [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									3,562	1,466	568
Operating expenses [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									71,248	19,737	8,562
External consulting fees [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									45,638	8,509	516
Internal labor [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									12,115	4,654	1,127
Employee severance [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									11,516	7,672	7,843
Restructuring and integration expense, net of reversals									10,865	5,774	7,176
Restructuring and integration accruals, total	$ 3,459				$ 3,179				3,459	3,179	4,376	$ 4,181
Other costs [Member]
Restructuring and integration expense [Line Items]
Restructuring and integration expense									$ 6,192	$ 2,266	$ 311