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

Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Detail)

Basis of Presentation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended
	Jul. 26, 2021	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Jul. 31, 2021
Remaining purchased interest, percentage		100.00%	100.00%
Cash settlement				$ 808,546
Deferred tax assets		$ 395,800	$ 395,800
Percentage of cash savings paid			85.00%
Tax receivable agreement liabilities		$ 282,470	$ 282,470
Temporary differences in deferred tax assets			$ 61,100
Equity Method Investment, Ownership Percentage		53.00%	53.00%
T R A [Member]
Deferred tax assets		$ 329,000	$ 329,000
Benefits from future deductions		234,000	234,000
Tax receivable agreement liabilities		282,500	282,500
TRA Alternative Payments and purchase of LLC Common Units [Member]
Alternative payment related to common units			72,900
Benefits from future deductions		95,000	95,000
RSG LLC [Member]
Cash settlement due to equity modification			$ 18,600
Common Stock [Member] \| RSG LLC [Member]
Own controlling interest			42.40%
Additional Paid-in Capital [Member]
Stock Issued During Period, Value, New Issues		$ (149)
Additional Paid-in Capital [Member] \| RSG LLC [Member]
Amount of modification in equity			$ 12,300
Noncontrolling Interest [Member] \| RSG LLC [Member]
Amount of modification in equity			$ 12,300
LLC Common Units [Member]
Remaining purchased interest, percentage		100.00%	100.00%
Alternative payment related to common units			$ 72,900
Payment for purchase of common units			799,300
Alternative payments for modification of equity grants			37,600
Return of capital on purchased common units			$ 35,300
LLC Common Units [Member] \| RSG LLC [Member]
Common units issued		213,693,861	213,693,861
Mandatorily Sell of Vested Stock Units Percentage			15.00%
Additional Sell of Vested Stock Units Percentage			10.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		0.10%	0.10%
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage		99.90%
Common Class A [Member]
Common stock, Par value		$ 0.001	$ 0.001
Common Class A [Member] \| LLC Common Units [Member]
Stock issued during period shares		31,992,135
Common stock conversion basis			one-for-one
Common Class B [Member]
Stock issued during period shares		149,162,107
Stock Issued During Period, Value, New Issues		$ 149
Common stock, Par value		$ 0.001	$ 0.001
Common Class B [Member] \| RSG LLC [Member]
Common units issued		20,680,420	20,680,420
Common Class B [Member] \| LLC Common Units [Member]
Stock issued during period shares			149,162,107
Common stock conversion basis			one-to-one
Additional consideration paid			$ 100
Common Class X [Member]
Common stock, Par value		$ 0.001	$ 0.001
Stock Repurchased and Retired During Period, Shares			640,784
Class C Incentive Units [Member]
Share price		$ 23.50	$ 23.50
Class C Incentive Units [Member] \| LLC Common Units [Member] \| RSG LLC [Member]
Stock issued during period shares			2,116,667
Onex [Member] \| Redeemable Preferred Units [Member]
Amount of net cash acquired from units			$ 343,200
Limited Liability Company (LLC) Preferred Unit, Outstanding		260,000,000	260,000,000
IPO [Member]
Stock Issued During Period, Value, New Issues		$ 1,448,097
Stock Repurchased and Retired During Period, Value		(183,616)
IPO [Member] \| Additional Paid-in Capital [Member]
Stock Issued During Period, Value, New Issues		1,448,032
Stock Repurchased and Retired During Period, Value
IPO [Member] \| Noncontrolling Interest [Member]
Stock Repurchased and Retired During Period, Value
IPO [Member] \| Common Class A [Member]
Stock issued during period shares		65,456,020	66,667
Stock Issued During Period, Value, New Issues		$ 65
Common stock, Par value	$ 0.001				$ 0.001
Share price	$ 23.50
Proceeds from issuance initial public offering	$ 1,448,100
Stock Repurchased and Retired During Period, Shares		8,224,708	8,224,708
Stock Repurchased and Retired During Period, Value		$ (8)
IPO [Member] \| Common Class A [Member] \| Common Stock [Member]
Stock issued during period shares	65,456,020
Share price		$ 23.50	$ 23.50
IPO [Member] \| Common Class A [Member] \| LLC Common Units [Member] \| Ryan Specialty Group Holdings Inc [Member]
Common units issued		1,349,640	1,349,640
IPO [Member] \| Common Class B [Member]
Common stock, Par value					0.001
IPO [Member] \| Common Class X [Member]
Common stock, Par value					$ 0.001
IPO [Member] \| Onex [Member] \| Redeemable Preferred Units [Member]
Limited Liability Company (LLC) Preferred Unit, Outstanding	260,000,000
2021 Omnibus Incentive Plan [Member] \| IPO [Member] \| Class C Incentive Units [Member] \| RSG LLC [Member]
Share price		$ 23.50	$ 23.50
2021 Omnibus Incentive Plan [Member] \| IPO [Member] \| Class C Incentive Units [Member] \| LLC Common Units [Member] \| RSG LLC [Member]
Common units issued		3,911,490	3,911,490
Restricted Stock [Member] \| 2021 Omnibus Incentive Plan [Member] \| Common Class A [Member] \| Common Stock [Member] \| Ryan Specialty Group Holdings Inc [Member]
Common units issued		11,426,502	11,426,502
Equity Awards [Member] \| IPO [Member]
Stock issued during period shares			8,066,349
Restricted Stock Units (RSUs) [Member]
Share price		$ 23.50	$ 23.50
Restricted Stock Units (RSUs) [Member] \| RSG LLC [Member] \| T R A [Member]
Alternative payment related to common units			$ 37,600
Restricted LLC Units [Member]
Common stock conversion basis			one-for-one
Restricted LLC Units [Member] \| IPO [Member] \| RSG LLC [Member]
Stock issued during period shares			1,543,277
Restricted LLC Units [Member] \| 2021 Omnibus Incentive Plan [Member] \| IPO [Member] \| LLC Common Units [Member] \| RSG LLC [Member]
Common units issued		27,493,192	27,493,192
Reload Options [Member]
Share price		$ 23.50	$ 23.50
Reload Options [Member] \| 2021 Omnibus Incentive Plan [Member] \| IPO [Member] \| LLC Common Units [Member] \| Ryan Specialty Group Holdings Inc [Member]
Common units issued		4,592,319	4,592,319
Reload Options [Member] \| 2021 Omnibus Incentive Plan [Member] \| IPO [Member] \| LLC Common Units [Member] \| RSG LLC [Member]
Share price		$ 23.50	$ 23.50
Cash Distribution [Member] \| LLC Common Units [Member]
Percentage of cash savings paid			85.00%