Guarantor/Non-Guarantor Financial Information - Summary of Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 86,392		$ 101,283	$ 147,346
Restricted cash	4,169		3,149	3,159
Accounts receivable (net of allowance for credit losses of $17.1 million)	172,816		160,979
Unbilled receivables	33,830		29,109
Inventory, net	16,549		12,093
Prepaid expenses and other current assets	34,615		41,456
Total current assets	348,371		348,069
Installation and service parts, net	15,381		13,332
Property and equipment, net	102,755		96,066
Operating lease assets	38,146		38,862
Intangible assets, net	429,813		487,299
Goodwill	832,811		838,867
Other non-current assets	12,583		14,561
Total assets	1,779,860		1,837,056
Current liabilities:
Accounts payable	69,107		67,556
Deferred revenue	29,743
Accrued liabilities	49,596		38,435
Tax receivable agreement liability, current portion	5,107		5,107
Current portion of long-term debt	11,952		36,952
Total current liabilities	165,505		175,191
Long-term debt, net of current portion	1,205,169		1,206,802
Operating lease liabilities, net of current portion	34,347		34,984
Tax receivable agreement liability, net of current portion	55,650		56,615
Private placement warrant liabilities	35,600		38,466
Asset retirement obligation	12,045		11,824
Deferred tax liabilities, net	21,829		47,524
Other long-term liabilities	5,492
Total liabilities	1,535,637		1,577,092
Total stockholders' equity	244,223	$ 275,815	259,964	$ 316,425	$ 308,518	$ 315,572
Total liabilities and stockholders' equity	1,779,860		$ 1,837,056
Verra Mobility Corporation (Ultimate Parent)
Current assets:
Investment in subsidiary	74,964
Total current assets	74,964
Due from affiliates	169,259
Total assets	244,223
Current liabilities:
Total stockholders' equity	244,223
Total liabilities and stockholders' equity	244,223
VM Consolidated Inc. (Guarantor Subsidiary)
Current assets:
Cash and cash equivalents	54,934
Restricted cash	4,130
Accounts receivable (net of allowance for credit losses of $17.1 million)	162,855
Unbilled receivables	29,222
Investment in subsidiary	141,993
Inventory, net	1,531
Prepaid expenses and other current assets	26,154
Total current assets	420,819
Installation and service parts, net	15,381
Property and equipment, net	85,405
Operating lease assets	30,854
Intangible assets, net	321,251
Goodwill	689,501
Other non-current assets	8,306
Total assets	1,571,517
Current liabilities:
Accounts payable	54,932
Deferred revenue	18,624
Accrued liabilities	38,210
Tax receivable agreement liability, current portion	5,107
Current portion of long-term debt	11,952
Total current liabilities	128,825
Long-term debt, net of current portion	1,205,169
Operating lease liabilities, net of current portion	28,933
Tax receivable agreement liability, net of current portion	55,650
Private placement warrant liabilities	35,600
Due to affiliates	24,982
Asset retirement obligation	12,020
Other long-term liabilities	5,374
Total liabilities	1,496,553
Total stockholders' equity	74,964
Total liabilities and stockholders' equity	1,571,517
Non-guarantor Subsidiaries
Current assets:
Cash and cash equivalents	31,458
Restricted cash	39
Accounts receivable (net of allowance for credit losses of $17.1 million)	9,961
Unbilled receivables	4,608
Inventory, net	15,018
Prepaid expenses and other current assets	8,461
Total current assets	69,545
Property and equipment, net	17,350
Operating lease assets	7,292
Intangible assets, net	108,562
Goodwill	143,310
Other non-current assets	4,277
Total assets	350,336
Current liabilities:
Accounts payable	14,175
Deferred revenue	11,119
Accrued liabilities	11,386
Total current liabilities	36,680
Operating lease liabilities, net of current portion	5,414
Due to affiliates	144,277
Asset retirement obligation	25
Deferred tax liabilities, net	21,829
Other long-term liabilities	118
Total liabilities	208,343
Total stockholders' equity	141,993
Total liabilities and stockholders' equity	350,336
Eliminations
Current assets:
Investment in subsidiary	(216,957)
Total current assets	(216,957)
Due from affiliates	(169,259)
Total assets	(386,216)
Current liabilities:
Due to affiliates	(169,259)
Total liabilities	(169,259)
Total stockholders' equity	(216,957)
Total liabilities and stockholders' equity	$ (386,216)