Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 01, 2021	Oct. 01, 2021	Sep. 01, 2021	May 01, 2021	Jan. 01, 2021	Dec. 31, 2020	Dec. 01, 2020	Nov. 01, 2020	Oct. 01, 2020	Sep. 01, 2020	Aug. 01, 2020	Jul. 01, 2020	May 01, 2020	Apr. 01, 2020	Mar. 01, 2020	Jan. 01, 2020	Dec. 31, 2019	Oct. 01, 2019	Aug. 01, 2019	Jul. 01, 2019	Jun. 01, 2019	May 01, 2019	Mar. 01, 2019	Feb. 01, 2019
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash	$ 57,832						$ 27,673											$ 3,217
Other current assets	76,941						22,043											12,956
Fixed assets	2,053						9,387											455
Goodwill	349,973						648,095											328,546
Other assets	3,432						3,652											55
Total assets acquired	646,371						952,024											473,943
Other current liabilities	(88,255)						(32,549)											(2,269)
Deferred income tax, net	(8,651)
Other liabilities	(13)						(26,313)											(407)
Total liabilities assumed	(96,919)						(58,862)											(2,676)
Net assets acquired	549,452						893,162											471,267
O'Leary
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash						$ 45,441
Other current assets						43,350
Fixed assets						544
Goodwill						84,619
Other assets						135
Total assets acquired						215,367
Other current liabilities						(72,649)
Deferred income tax, net						(5,057)
Other liabilities						(13)
Total liabilities assumed						(77,719)
Net assets acquired						137,648
Piper
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash					$ 0
Other current assets					2,397
Fixed assets					9
Goodwill					40,019
Other assets					0
Total assets acquired					54,679
Other current liabilities					0
Deferred income tax, net					0
Other liabilities					0
Total liabilities assumed					0
Net assets acquired					54,679
Berkshire
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash				$ 0
Other current assets				1,621
Fixed assets				9
Goodwill				27,059
Other assets				504
Total assets acquired				41,517
Other current liabilities				(17)
Deferred income tax, net				0
Other liabilities				0
Total liabilities assumed				(17)
Net assets acquired				41,500
AGIS
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash				0
Other current assets				13,693
Fixed assets				20
Goodwill				8,715
Other assets				0
Total assets acquired				36,056
Other current liabilities				0
Deferred income tax, net				0
Other liabilities				0
Total liabilities assumed				0
Net assets acquired				36,056
Winston
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash			$ 5,024
Other current assets			7,527
Fixed assets			1,185
Goodwill			74,441
Other assets			27
Total assets acquired			114,082
Other current liabilities			(5,470)
Deferred income tax, net			0
Other liabilities			0
Total liabilities assumed			(5,470)
Net assets acquired			108,612
Remedy
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash			6,675
Other current assets			1,786
Fixed assets			151
Goodwill			33,255
Other assets			1,354
Total assets acquired			57,426
Other current liabilities			(5,233)
Deferred income tax, net			(3,594)
Other liabilities			0
Total liabilities assumed			(8,827)
Net assets acquired			48,599
Heacock
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash			0
Other current assets			738
Fixed assets			39
Goodwill			13,910
Other assets			382
Total assets acquired			20,900
Other current liabilities			(297)
Deferred income tax, net			0
Other liabilities			0
Total liabilities assumed			(297)
Net assets acquired			20,603
CIA
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash		$ 0
Other current assets		32
Fixed assets		11
Goodwill		17,310
Other assets		278
Total assets acquired		22,423
Other current liabilities		(386)
Deferred income tax, net		0
Other liabilities		0
Total liabilities assumed		(386)
Net assets acquired		22,037
Rainmaker
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash		0
Other current assets		0
Fixed assets		8
Goodwill		15,029
Other assets		0
Total assets acquired		20,887
Other current liabilities		0
Deferred income tax, net		0
Other liabilities		0
Total liabilities assumed		0
Net assets acquired		20,887
HARCO
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash	0
Other current assets	737
Fixed assets	63
Goodwill	20,609
Other assets	493
Total assets acquired	30,117
Other current liabilities	(428)
Deferred income tax, net	0
Other liabilities	0
Total liabilities assumed	(428)
Net assets acquired	29,689
Special Risk
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																	$ 0
Other current assets																	2,477
Fixed assets																	345
Goodwill																	63,087
Other assets																	0
Total assets acquired																	80,331
Other current liabilities																	(316)
Other liabilities																	0
Total liabilities assumed																	(316)
Net assets acquired																	80,015
Texas Risk
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																	0
Other current assets																	446
Fixed assets																	27
Goodwill																	8,940
Other assets																	0
Total assets acquired																	12,660
Other current liabilities																	(1,680)
Other liabilities																	0
Total liabilities assumed																	(1,680)
Net assets acquired																	10,980
Colonial
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																$ 0
Other current assets																1,344
Fixed assets																59
Goodwill																27,845
Other assets																0
Total assets acquired																38,496
Other current liabilities																(1,355)
Other liabilities																0
Total liabilities assumed																(1,355)
Net assets acquired																37,141
RLA
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																0
Other current assets																0
Fixed assets																55
Goodwill																53,567
Other assets																0
Total assets acquired																66,412
Other current liabilities																(11,443)
Other liabilities																0
Total liabilities assumed																(11,443)
Net assets acquired																54,969
Sterling
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash															$ 0
Other current assets															612
Fixed assets															16
Goodwill															17,339
Other assets															0
Total assets acquired															23,950
Other current liabilities															(180)
Other liabilities															0
Total liabilities assumed															(180)
Net assets acquired															23,770
LP
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash														$ 0
Other current assets														3,162
Fixed assets														1,877
Goodwill														99,983
Other assets														0
Total assets acquired														149,854
Other current liabilities														(10)
Other liabilities														(184)
Total liabilities assumed														(194)
Net assets acquired														149,660
First
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash													$ 0
Other current assets													302
Fixed assets													1
Goodwill													9,523
Other assets													0
Total assets acquired													14,942
Other current liabilities													(16)
Other liabilities													0
Total liabilities assumed													(16)
Net assets acquired													14,926
Buiten
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash												$ 0
Other current assets												2,595
Fixed assets												43
Goodwill												33,641
Other assets												0
Total assets acquired												47,693
Other current liabilities												(845)
Other liabilities												0
Total liabilities assumed												(845)
Net assets acquired												46,848
Amity
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash												0
Other current assets												653
Fixed assets												58
Goodwill												15,454
Other assets												0
Total assets acquired												21,800
Other current liabilities												(2,920)
Other liabilities												0
Total liabilities assumed												(2,920)
Net assets acquired												18,880
Neal
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash											$ 0
Other current assets											2,337
Fixed assets											46
Goodwill											28,929
Other assets											274
Total assets acquired											44,842
Other current liabilities											(3,056)
Other liabilities											0
Total liabilities assumed											(3,056)
Net assets acquired											41,786
Brook Stone
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash											0
Other current assets											527
Fixed assets											22
Goodwill											8,585
Other assets											290
Total assets acquired											13,134
Other current liabilities											(46)
Other liabilities											0
Total liabilities assumed											(46)
Net assets acquired											13,088
VAS
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash										$ 27,673
Other current assets										5,486
Fixed assets										138
Goodwill										100,826
Other assets										0
Total assets acquired										182,412
Other current liabilities										(3,760)
Other liabilities										(26,129)
Total liabilities assumed										(29,889)
Net assets acquired										152,523
Bright
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash										0
Other current assets										402
Fixed assets										23
Goodwill										12,218
Other assets										0
Total assets acquired										17,740
Other current liabilities										(101)
Other liabilities										0
Total liabilities assumed										(101)
Net assets acquired										17,639
J.E. Brown
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash										0
Other current assets										0
Fixed assets										32
Goodwill										31,476
Other assets										0
Total assets acquired										41,028
Other current liabilities										(720)
Other liabilities										0
Total liabilities assumed										(720)
Net assets acquired										40,308
Cover Hound
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash									$ 0
Other current assets									375
Fixed assets									6,441
Goodwill									19,524
Other assets									0
Total assets acquired									30,018
Other current liabilities									(1,823)
Other liabilities									0
Total liabilities assumed									(1,823)
Net assets acquired									28,195
MAJ
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash								$ 0
Other current assets								413
Fixed assets								0
Goodwill								13,003
Other assets								0
Total assets acquired								21,461
Other current liabilities								(83)
Other liabilities								0
Total liabilities assumed								(83)
Net assets acquired								21,378
South & Western
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash								0
Other current assets								0
Fixed assets								149
Goodwill								63,128
Other assets								0
Total assets acquired								81,811
Other current liabilities								(3,651)
Other liabilities								0
Total liabilities assumed								(3,651)
Net assets acquired								78,160
Berry
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash							0
Other current assets							0
Fixed assets							30
Goodwill							29,702
Other assets							0
Total assets acquired							39,444
Other current liabilities							(424)
Other liabilities							0
Total liabilities assumed							(424)
Net assets acquired							39,020
Smith Insurance Associates, Inc. (Smith)
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																									$ 0
Other current assets																									680
Fixed assets																									39
Goodwill																									16,042
Other assets																									0
Total assets acquired																									23,302
Other current liabilities																									(469)
Deferred income tax, net																									0
Total liabilities assumed																									(469)
Net assets acquired																									22,833
Pipino
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																									0
Other current assets																									819
Fixed assets																									112
Goodwill																									16,765
Other assets																									772
Total assets acquired																									29,839
Other current liabilities																									(3,463)
Deferred income tax, net																									0
Total liabilities assumed																									(3,463)
Net assets acquired																									26,376
Cossio
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																								$ 0
Other current assets																								236
Fixed assets																								29
Goodwill																								10,010
Other assets																								0
Total assets acquired																								14,699
Other current liabilities																								(3)
Deferred income tax, net																								0
Total liabilities assumed																								(3)
Net assets acquired																								14,696
Medval
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																								3,217
Other current assets																								1,708
Fixed assets																								50
Goodwill																								19,108
Other assets																								15
Total assets acquired																								31,399
Other current liabilities																								(480)
Deferred income tax, net																								(29)
Total liabilities assumed																								(509)
Net assets acquired																								30,890
United
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																							$ 0
Other current assets																							477
Fixed assets																							20
Goodwill																							15,111
Other assets																							0
Total assets acquired																							22,684
Other current liabilities																							(41)
Deferred income tax, net																							0
Total liabilities assumed																							(41)
Net assets acquired																							22,643
Twinbrook
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																						$ 0
Other current assets																						919
Fixed assets																						85
Goodwill																						18,935
Other assets																						0
Total assets acquired																						28,508
Other current liabilities																						(292)
Deferred income tax, net																						0
Total liabilities assumed																						(292)
Net assets acquired																						28,216
IRS
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																					$ 0
Other current assets																					1,375
Fixed assets																					11
Goodwill																					24,938
Other assets																					0
Total assets acquired																					35,135
Other current liabilities																					(126)
Deferred income tax, net																					0
Total liabilities assumed																					(126)
Net assets acquired																					35,009
WBR
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																				$ 0
Other current assets																				449
Fixed assets																				10
Goodwill																				9,096
Other assets																				0
Total assets acquired																				13,611
Other current liabilities																				(166)
Deferred income tax, net																				(378)
Total liabilities assumed																				(544)
Net assets acquired																				13,067
Yozell
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																				0
Other current assets																				1,781
Fixed assets																				12
Goodwill																				8,904
Other assets																				0
Total assets acquired																				14,268
Other current liabilities																				0
Deferred income tax, net																				0
Total liabilities assumed																				0
Net assets acquired																				14,268
CKP
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																				0
Other current assets																				9,170
Fixed assets																				193
Goodwill																				110,495
Other assets																				0
Total assets acquired																				152,153
Other current liabilities																				(870)
Deferred income tax, net																				0
Total liabilities assumed																				(870)
Net assets acquired																				151,283
Poole
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																			$ 0
Other current assets																			938
Fixed assets																			4
Goodwill																			28,233
Other assets																			0
Total assets acquired																			39,567
Other current liabilities																			(2,578)
Other liabilities																			0
Total liabilities assumed																			(2,578)
Net assets acquired																			36,989
VGW
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash																			0
Other current assets																			1,190
Fixed assets																			20
Goodwill																			16,595
Other assets																			0
Total assets acquired																			26,931
Other current liabilities																			(16)
Other liabilities																			0
Total liabilities assumed																			(16)
Net assets acquired																			26,915
Other Acquisitions
Fair Value Of Assets And Liabilities Statement [Line Items]
Cash	692						0											0
Other current assets	5,060						912											(6,786)
Fixed assets	14						25											(130)
Goodwill	15,007						11,325											34,314
Other assets	259						3,088											(732)
Total assets acquired	32,917						23,996											41,847
Other current liabilities	(3,775)						(120)											6,235
Deferred income tax, net	0
Other liabilities	0						0											0
Total liabilities assumed	(3,775)						(120)											6,235
Net assets acquired	29,142						23,876											48,082
Purchased Customer Accounts
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets	153,622						239,961											128,302
Purchased Customer Accounts | O'Leary
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets						40,459
Purchased Customer Accounts | Piper
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets					12,233
Purchased Customer Accounts | Berkshire
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets				12,313
Purchased Customer Accounts | AGIS
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets				13,577
Purchased Customer Accounts | Winston
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets			25,006
Purchased Customer Accounts | Remedy
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets			13,697
Purchased Customer Accounts | Heacock
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets			5,800
Purchased Customer Accounts | CIA
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets		4,781
Purchased Customer Accounts | Rainmaker
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets		5,838
Purchased Customer Accounts | HARCO
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets	8,183
Purchased Customer Accounts | Special Risk
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																	14,286
Purchased Customer Accounts | Texas Risk
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																	3,222
Purchased Customer Accounts | Colonial
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																9,205
Purchased Customer Accounts | RLA
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																12,309
Purchased Customer Accounts | Sterling
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets															5,962
Purchased Customer Accounts | LP
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets														44,801
Purchased Customer Accounts | First
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets													5,095
Purchased Customer Accounts | Buiten
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets												11,323
Purchased Customer Accounts | Amity
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets												5,614
Purchased Customer Accounts | Neal
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets											13,225
Purchased Customer Accounts | Brook Stone
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets											3,689
Purchased Customer Accounts | VAS
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets										48,188
Purchased Customer Accounts | Bright
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets										5,055
Purchased Customer Accounts | J.E. Brown
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets										9,479
Purchased Customer Accounts | Cover Hound
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets									3,678
Purchased Customer Accounts | MAJ
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets								8,034
Purchased Customer Accounts | South & Western
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets								18,513
Purchased Customer Accounts | Berry
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets							9,701
Purchased Customer Accounts | Smith Insurance Associates, Inc. (Smith)
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																									6,500
Purchased Customer Accounts | Pipino
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																									11,360
Purchased Customer Accounts | Cossio
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																								4,403
Purchased Customer Accounts | Medval
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																								7,300
Purchased Customer Accounts | United
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																							7,065
Purchased Customer Accounts | Twinbrook
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																						8,557
Purchased Customer Accounts | IRS
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																					8,800
Purchased Customer Accounts | WBR
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																				4,022
Purchased Customer Accounts | Yozell
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																				3,550
Purchased Customer Accounts | CKP
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																				32,274
Purchased Customer Accounts | Poole
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																			10,359
Purchased Customer Accounts | VGW
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																			9,092
Purchased Customer Accounts | Other Acquisitions
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets	11,735						8,582											15,020
Non-compete Agreements
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets	2,518						1,213											412
Non-compete Agreements | O'Leary
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets						$ 819
Non-compete Agreements | Piper
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets					$ 21
Non-compete Agreements | Berkshire
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets				11
Non-compete Agreements | AGIS
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets				$ 51
Non-compete Agreements | Winston
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets			872
Non-compete Agreements | Remedy
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets			508
Non-compete Agreements | Heacock
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets			$ 31
Non-compete Agreements | CIA
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets		11
Non-compete Agreements | Rainmaker
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets		$ 12
Non-compete Agreements | HARCO
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets	32
Non-compete Agreements | Special Risk
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																	136
Non-compete Agreements | Texas Risk
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																	$ 25
Non-compete Agreements | Colonial
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																43
Non-compete Agreements | RLA
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																$ 481
Non-compete Agreements | Sterling
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets															$ 21
Non-compete Agreements | LP
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets														$ 31
Non-compete Agreements | First
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets													$ 21
Non-compete Agreements | Buiten
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets												91
Non-compete Agreements | Amity
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets												$ 21
Non-compete Agreements | Neal
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets											31
Non-compete Agreements | Brook Stone
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets											$ 21
Non-compete Agreements | VAS
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets										101
Non-compete Agreements | Bright
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets										42
Non-compete Agreements | J.E. Brown
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets										$ 41
Non-compete Agreements | Cover Hound
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets									$ 0
Non-compete Agreements | MAJ
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets								11
Non-compete Agreements | South & Western
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets								$ 21
Non-compete Agreements | Berry
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets							11
Non-compete Agreements | Smith Insurance Associates, Inc. (Smith)
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																									41
Non-compete Agreements | Pipino
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																									$ 11
Non-compete Agreements | Cossio
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																								21
Non-compete Agreements | Medval
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																								$ 1
Non-compete Agreements | United
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																							$ 11
Non-compete Agreements | Twinbrook
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																						$ 12
Non-compete Agreements | IRS
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																					$ 11
Non-compete Agreements | WBR
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																				34
Non-compete Agreements | Yozell
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																				21
Non-compete Agreements | CKP
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																				$ 21
Non-compete Agreements | Poole
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																			33
Non-compete Agreements | VGW
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets																			$ 34
Non-compete Agreements | Other Acquisitions
Fair Value Of Assets And Liabilities Statement [Line Items]
Intangible assets	$ 150						$ 64											$ 161