CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (9,579)	$ (15,039)	$ (22,636)	$ (25,527)
Other comprehensive loss:
Foreign currency translation adjustments	105	(19)	111	144
Unrealized loss on available-for-sale securities	(143)	0	(452)	0
Unrealized gain on interest rate hedging instruments	1,694	0	3,340	0
Comprehensive loss	(7,923)	(15,058)	(19,637)	(25,383)
Less: Comprehensive loss attributable to Definitive OpCo prior to the Reorganization Transactions	0	(15,058)		(25,383)
Less: Comprehensive loss attributable to noncontrolling interests	(3,849)	0	(7,795)	0
Comprehensive loss attributable to Definitive Healthcare Corp.	$ (4,074)	$ 0	$ (11,842)	$ 0