Business Combinations - Summary of Preliminary and Final Purchase Allocation (Details) - USD ($)	Sep. 30, 2020	Jul. 23, 2020	Feb. 10, 2020	Dec. 31, 2019	Oct. 14, 2019	Sep. 30, 2019	Aug. 13, 2019	Jul. 11, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 415,510,625			$ 389,660,519		$ 370,779,661			$ 119,529,202
Hawk Parent Holdings LLC
Business Acquisition [Line Items]
Cash and cash equivalents								$ 11,281,078
Accounts receivable								10,593,867
Prepaid expenses and other current assets								890,745
Total current assets								22,765,690
Property, plant and equipment, net								1,167,872
Restricted cash								6,930,434
Identifiable intangible assets								301,000,000
Total identifiable assets acquired								331,863,996
Accounts payable								(4,206,413)
Accrued expenses								(8,831,363)
Accrued employee payments								(6,501,123)
Other liabilities								(16,864)
Repay debt assumed								(93,514,583)
Net identifiable assets acquired								218,793,650
Goodwill								339,911,400
Total purchase price								$ 558,705,050
TriSource Solutions, LLC
Business Acquisition [Line Items]
Cash and cash equivalents							$ 383,236
Accounts receivable							2,290,441
Prepaid expenses and other current assets							95,763
Total current assets							2,769,440
Property, plant and equipment, net							215,739
Restricted cash							509,019
Identifiable intangible assets							30,500,000
Total identifiable assets acquired							33,994,198
Accounts payable							(1,621,252)
Accrued expenses							(756,117)
Net identifiable assets acquired							31,616,829
Goodwill							30,868,261
Total purchase price							$ 62,485,090
APS Payments
Business Acquisition [Line Items]
Accounts receivable					$ 1,963,177
Prepaid expenses and other current assets					67,158
Total current assets					2,030,335
Property, plant and equipment, net					159,553
Restricted cash					549,978
Identifiable intangible assets					21,500,000
Total identifiable assets acquired					24,239,866
Accounts payable					(1,101,706)
Accrued expenses					(19,018)
Net identifiable assets acquired					23,119,142
Goodwill					25,926,861
Total purchase price					$ 49,046,003
Ventanex
Business Acquisition [Line Items]
Cash and cash equivalents			$ 50,663
Accounts receivable			1,376,539
Prepaid expenses and other current assets			180,514
Total current assets			1,607,716
Property, plant and equipment, net			137,833
Restricted cash			428,313
Identifiable intangible assets			26,890,000
Total identifiable assets acquired			29,063,862
Accounts payable			(152,035)
Accrued expenses			(373,159)
Net identifiable assets acquired			28,538,668
Goodwill			12,200,461
Total purchase price			$ 40,739,129
cPayPlus
Business Acquisition [Line Items]
Cash and cash equivalents		$ 262,331
Accounts receivable		164,789
Prepaid expenses and other current assets		37,660
Total current assets		464,780
Property, plant and equipment, net		20,976
Identifiable intangible assets		7,720,000
Total identifiable assets acquired		8,205,756
Accounts payable		(99,046)
Accrued expenses		(363,393)
Net identifiable assets acquired		7,743,317
Goodwill		6,603,642
Total purchase price		$ 14,346,959