Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 276,545	$ 242,875	$ 538,700	$ 488,921
Crawford Loss Adjusting
Disaggregation of Revenue [Line Items]
Revenues	115,956	109,062	228,493	216,166
Crawford Loss Adjusting | U.S.
Disaggregation of Revenue [Line Items]
Revenues	35,737	31,057	70,722	61,535
Crawford Loss Adjusting | U.K.
Disaggregation of Revenue [Line Items]
Revenues	26,347	26,843	51,245	53,035
Crawford Loss Adjusting | Australia
Disaggregation of Revenue [Line Items]
Revenues	19,126	17,942	36,220	32,735
Crawford Loss Adjusting | Canada
Disaggregation of Revenue [Line Items]
Revenues	12,887	13,226	26,493	28,871
Crawford Loss Adjusting | Europe
Disaggregation of Revenue [Line Items]
Revenues	14,058	12,426	26,649	24,506
Crawford Loss Adjusting | Rest of World
Disaggregation of Revenue [Line Items]
Revenues	7,801	7,568	17,164	15,484
Crawford TPA Solutions
Disaggregation of Revenue [Line Items]
Revenues	100,374	88,668	198,619	186,665
Crawford TPA Solutions | Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	62,024	54,093	124,143	110,021
Crawford TPA Solutions | Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	38,350	34,575	74,476	76,644
Crawford TPA Solutions | U.S.
Disaggregation of Revenue [Line Items]
Revenues	75,902	69,173	150,178	147,266
Crawford TPA Solutions | U.S. | Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	37,552	34,598	75,702	70,622
Crawford TPA Solutions | U.S. | Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	38,350	34,575	74,476	76,644
Crawford TPA Solutions | U.K.
Disaggregation of Revenue [Line Items]
Revenues	5,570	4,227	10,449	8,240
Crawford TPA Solutions | U.K. | Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	5,570	4,227	10,449	8,240
Crawford TPA Solutions | U.K. | Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Crawford TPA Solutions | Canada
Disaggregation of Revenue [Line Items]
Revenues	4,626	5,583	9,812	12,032
Crawford TPA Solutions | Canada | Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	4,626	5,583	9,812	12,032
Crawford TPA Solutions | Canada | Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Crawford TPA Solutions | Europe and Rest of World
Disaggregation of Revenue [Line Items]
Revenues	14,276	9,685	28,180	19,127
Crawford TPA Solutions | Europe and Rest of World | Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	14,276	9,685	28,180	19,127
Crawford TPA Solutions | Europe and Rest of World | Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Crawford Platform Solutions
Disaggregation of Revenue [Line Items]
Revenues	51,127	36,686	93,526	69,116
Crawford Platform Solutions | Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	24,443	20,748	45,425	39,786
Crawford Platform Solutions | Network Business
Disaggregation of Revenue [Line Items]
Revenues	26,684	15,938	48,101	29,330
Crawford Platform Solutions | U.S.
Disaggregation of Revenue [Line Items]
Revenues	44,075	31,659	80,216	57,534
Crawford Platform Solutions | U.S. | Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	19,535	17,869	36,052	33,196
Crawford Platform Solutions | U.S. | Network Business
Disaggregation of Revenue [Line Items]
Revenues	24,540	13,790	44,164	24,338
Crawford Platform Solutions | U.K.
Disaggregation of Revenue [Line Items]
Revenues	2,363	1,489	4,809	3,667
Crawford Platform Solutions | U.K. | Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	2,363	1,489	4,791	3,645
Crawford Platform Solutions | U.K. | Network Business
Disaggregation of Revenue [Line Items]
Revenues	0	0	18	22
Crawford Platform Solutions | Canada
Disaggregation of Revenue [Line Items]
Revenues	2,824	2,044	5,266	5,170
Crawford Platform Solutions | Canada | Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	2,079	1,193	3,710	2,612
Crawford Platform Solutions | Canada | Network Business
Disaggregation of Revenue [Line Items]
Revenues	745	851	1,556	2,558
Crawford Platform Solutions | Europe and Rest of World
Disaggregation of Revenue [Line Items]
Revenues	1,865	1,494	3,235	2,745
Crawford Platform Solutions | Europe and Rest of World | Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	466	197	872	333
Crawford Platform Solutions | Europe and Rest of World | Network Business
Disaggregation of Revenue [Line Items]
Revenues	$ 1,399	$ 1,297	$ 2,363	$ 2,412