CONSOLIDATED STATEMENTS OF CHANGES IN MEMBERS' EQUITY AND TOTAL EQUITY - USD ($) $ in Thousands	Total	Reorganization Transactions [Member]	IPO [Member]	Secondary offering	Definitive Healthcare Corp. [Member] Secondary offering	Definitive OpCo [Member] IPO [Member]	Definitive OpCo [Member] Secondary offering	Class A Units	Class A Units IPO [Member]	Class A Units Definitive Healthcare Corp. [Member] IPO [Member]	Class A Units Definitive Healthcare Corp. [Member] Secondary offering	Class B Units	Class B Units Definitive OpCo [Member] IPO [Member]	Class B Units Definitive OpCo [Member] Secondary offering	Members Equity	Additional Paid-In Capital	Additional Paid-In Capital Reorganization Transactions [Member]	Additional Paid-In Capital IPO [Member]	Additional Paid-In Capital Secondary offering	Additional Paid-In Capital Definitive Healthcare Corp. [Member] IPO [Member]	Additional Paid-In Capital Definitive Healthcare Corp. [Member] Secondary offering	Additional Paid-In Capital Definitive OpCo [Member] IPO [Member]	Additional Paid-In Capital Definitive OpCo [Member] Secondary offering	Accumulated Deficit	Accumulated Deficit Reorganization Transactions [Member]	Accumulated Other Comprehensive (Loss) Income	Accumulated Other Comprehensive (Loss) Income IPO [Member]	Noncontrolling Interests	Noncontrolling Interests Reorganization Transactions [Member]	Noncontrolling Interests Secondary offering	Previously Reported [Member]	Previously Reported [Member] Reorganization Transactions [Member]	Previously Reported [Member] Members Equity	Previously Reported [Member] Accumulated Other Comprehensive (Loss) Income
Beginning Balance at Dec. 31, 2019	$ 1,216,240							$ 1,271,254				$ 744												$ (55,758)
Beginning Balance (in shares) at Dec. 31, 2019								127,125,435
Net Income Loss	0																							(51,157)
Net loss	(51,157)
Distributions to members prior to Reorganization Transactions	(2,940)																							2,940
contributions	31,804							$ 31,804
Conrtibutions , shares								3,120,555
Equity-based compensation	1,747											$ 1,747
Equity based compensation , shares												474,920
Comprehensive loss	0																									$ (131)
Comprehensive Loss	(131)
Ending Balance at Dec. 31, 2020	1,195,563							$ 1,303,058				$ 2,491												(109,855)		(131)					$ 1,195,563		$ 1,195,694	$ (131)
Ending Balance (in shares) at Dec. 31, 2020								130,245,990				474,920
Net Income Loss	(17,677)	$ (27,914)																							$ (17,677)				$ (10,237)
Net loss	(61,257)
Distributions to members prior to Reorganization Transactions	(989)																											$ (989)			(7,139)		7,139
Net loss prior to Reorganization Transactions																																$ (33,343)	(33,343)
Other comprehensive income prior to Reorganization Transactions			$ 51																								$ 51				142			$ 142
contributions	5,500																														5,500		5,500
Equity-based compensation	300	$ 8,214																											$ 3,151		$ 1,743		$ 1,743
Initial effect of the Reorganization Transactions and IPO on noncontrolling interests	(217,447)							$ 73							$ (1,162,455)	$ 351,074												593,861
Initial effect of the Reorganization Transactions and IPO on noncontrolling interests, Share								72,871,733				61,262,052
Issuance of Class A common stock in IPO, net of costs	380,526		441,418					$ 11	$ 18							380,515		$ 441,400
Issuance of Class A common stock in IPO net of costs, Share								11,000,000	17,888,888
Repurchase of share			$ (63,212)		$ (77,584)	$ (29,600)	$ (61,376)			$ (3)	$ (2)									$ 63,209	$ 77,582	$ 29,600	$ 61,376
Repurchase of share, Shares										(2,497,288)	(2,233,238)		(1,169,378)	(1,766,762)
Equity-based compensation, additional paid in capital																	$ 5,063
Comprehensive loss	(17,626)
Comprehensive Loss	193
Forfeited unvested incentive units												(81,285)
Effect of follow-on offering on tax receivable agreements liability				$ (11,291)																			$ (11,291)
Effect of secondary offering and repurchase on noncontrolling interests																			$ (43,576)											$ 43,576
Allocation of vested incentive units to noncontrolling interests																(694)												694
Ending Balance at Dec. 31, 2021	1,503,262							$ 97								890,724								(17,677)		62		630,056
Ending Balance (in shares) at Dec. 31, 2021								97,030,095				58,244,627
Net Income Loss	(6,037)																							(6,037)				(16,218)
Net loss	(22,255)
Other comprehensive income prior to Reorganization Transactions																										3,606
Other comprehensive income, Noncontrolling Interests	5,494																											1,888
Vested incentive units																(7,955)												7,955
Issuance of Class A Common Stock upon vesting of RSUs, shares								716,776
Issuance of Class A Common Stock upon vesting of RSUs																1,717												(1,717)
Shares withheld related to net share settlement (in shares)								(233,252)
Shares withheld related to net share settlement	(4,116)															(4,116)
Effect of LLC unit exchanges, shares								(7,624,654)				(7,624,654)
Effect of LLC unit exchanges	(18,727)							$ 8								63,481												(82,216)
Equity-based compensation																												12,262
Equity-based compensation, Total equity	36,434
Distributions to noncontrolling interests	(12,871)															4,054												(16,925)
Equity-based compensation, additional paid in capital																24,172
Comprehensive loss	(2,431)
Comprehensive Loss	(832)
Forfeited unvested incentive units												(186,872)
Ending Balance at Dec. 31, 2022	$ 1,487,221							$ 105				$ 0				$ 972,077								$ (23,714)		$ 3,668		$ 535,085
Ending Balance (in shares) at Dec. 31, 2022								105,138,273				50,433,101