Ryan Specialty Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Reconciliation of Beginning and Ending Balances for the Level 3 (Detail) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Opening balance	$ 52,519	$ 24,418
Total gains/losses included in earnings	39,976	2,681
Settlements	(73,112)	(1,272)
Ending balance	19,383	25,827
Make-Whole provision on Redeemable Preferred Units [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Opening balance	30,423	891
Total gains/losses included in earnings	36,914	815
Settlements	(67,337)
Ending balance	0	1,706
Contingent consideration [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Opening balance	22,096	23,527
Total gains/losses included in earnings	3,062	1,866
Settlements	(5,775)	(1,272)
Ending balance	$ 19,383	$ 24,121