Guarantor/Non-Guarantor Financial Information - Summary of Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities:
Net income (loss)			$ 39,681	$ (4,923)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	$ 34,540	$ 27,013	70,215	55,227
Amortization of deferred financing costs and discounts			2,693
Change in fair value of private placement warrants	(6,600)	8,067	(2,866)	10,134
Tax receivable agreement liability adjustment	(965)	1,661	(965)	1,661
Loss on extinguishment of debt			0	5,334
Credit loss expense			7,036	3,863
Deferred income taxes			(15,700)	(825)
Stock-based compensation	4,566	3,573	9,012	6,481
Other			760	257
Changes in operating assets and liabilities:
Accounts receivable, net			(19,112)	(42,970)
Unbilled receivables			(4,918)	(2,098)
Inventory, net			(7,397)	923
Prepaid expenses and other assets			8,931	(2,100)
Deferred revenue			2,917	2,146
Accounts payable and accrued liabilities			1,711
Other liabilities			4,377	(545)
Net cash provided by operating activities			96,375	37,478
Cash Flows from Investing Activities:
Acquisition of business, net of cash and restricted cash acquired			0	(107,004)
Payment of contingent consideration			(647)	0
Purchases of installation and service parts and property and equipment			(22,724)	(8,257)
Cash proceeds from the sale of assets			72
Net cash used in investing activities			(23,299)	(115,102)
Cash Flows from Financing Activities:
Borrowings of long-term debt			0	996,750
Repayment on the revolver			(25,000)	0
Repayment of long-term debt			(4,510)	(881,281)
Payment of debt issuance costs			(246)	(6,507)
Payment of debt extinguishment costs			0	(1,066)
Share repurchase and retirement			(55,281)	0
Proceeds from exercise of stock options			159	87
Payment of employee tax withholding related to RSUs vesting			(1,639)	(953)
Net cash used in financing activities			(86,517)	107,030
Effect of exchange rate changes on cash and cash equivalents			(430)	207
Net (decrease) increase in cash, cash equivalents and restricted cash			(13,871)	29,613
Cash, cash equivalents and restricted cash - beginning of period			104,432	120,892
Cash, cash equivalents and restricted cash - end of period	90,561	$ 150,505	90,561	150,505
Supplemental cash flow information:
Interest paid			26,036	13,054
Income taxes paid, net of refunds			26,027	4,995
Supplemental non-cash investing and financing activities:
Purchases of installation and service parts and property and equipment in accounts payable and accrued liabilities at period-end			4,617	$ 3,358
Verra Mobility Corporation (Ultimate Parent)
Cash Flows from Operating Activities:
Net income (loss)			39,681
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Income from equity investment			(39,681)
VM Consolidated Inc. (Guarantor Subsidiary)
Cash Flows from Operating Activities:
Net income (loss)			39,681
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization			59,983
Amortization of deferred financing costs and discounts			2,693
Change in fair value of private placement warrants	(6,600)		(2,866)
Tax receivable agreement liability adjustment	(965)		(965)
Credit loss expense			6,769
Deferred income taxes			(14,483)
Stock-based compensation			9,012
Other			760
Income from equity investment			5,254
Changes in operating assets and liabilities:
Accounts receivable, net			(19,443)
Unbilled receivables			(5,003)
Inventory, net			(2,918)
Prepaid expenses and other assets			8,785
Deferred revenue			1,454
Accounts payable and accrued liabilities			4,788
Due to affiliates			(3,497)
Other liabilities			4,342
Net cash provided by operating activities			94,346
Cash Flows from Investing Activities:
Payment of contingent consideration			(647)
Purchases of installation and service parts and property and equipment			(17,179)
Cash proceeds from the sale of assets			72
Net cash used in investing activities			(17,754)
Cash Flows from Financing Activities:
Repayment on the revolver			(25,000)
Repayment of long-term debt			(4,510)
Payment of debt issuance costs			(246)
Share repurchase and retirement			(55,281)
Proceeds from exercise of stock options			159
Payment of employee tax withholding related to RSUs vesting			(1,639)
Net cash used in financing activities			(86,517)
Net (decrease) increase in cash, cash equivalents and restricted cash			(9,925)
Cash, cash equivalents and restricted cash - beginning of period			68,989
Cash, cash equivalents and restricted cash - end of period	59,064		59,064
Supplemental cash flow information:
Interest paid			26,036
Income taxes paid, net of refunds			25,764
Supplemental non-cash investing and financing activities:
Purchases of installation and service parts and property and equipment in accounts payable and accrued liabilities at period-end			4,617
Non-guarantor Subsidiaries
Cash Flows from Operating Activities:
Net income (loss)			(5,254)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization			10,232
Credit loss expense			267
Deferred income taxes			(1,217)
Income from equity investment
Changes in operating assets and liabilities:
Accounts receivable, net			331
Unbilled receivables			85
Inventory, net			(4,479)
Prepaid expenses and other assets			146
Deferred revenue			1,463
Accounts payable and accrued liabilities			(3,077)
Due to affiliates			3,497
Other liabilities			35
Net cash provided by operating activities			2,029
Cash Flows from Investing Activities:
Purchases of installation and service parts and property and equipment			(5,545)
Net cash used in investing activities			(5,545)
Cash Flows from Financing Activities:
Effect of exchange rate changes on cash and cash equivalents			(430)
Net (decrease) increase in cash, cash equivalents and restricted cash			(3,946)
Cash, cash equivalents and restricted cash - beginning of period			35,443
Cash, cash equivalents and restricted cash - end of period	$ 31,497		31,497
Supplemental cash flow information:
Income taxes paid, net of refunds			263
Eliminations
Cash Flows from Operating Activities:
Net income (loss)			(34,427)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Income from equity investment			$ 34,427