Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 297,562	$ 261,669	$ 836,262	$ 750,590
Crawford Loss Adjusting
Disaggregation of Revenue [Line Items]
Revenues	123,965	110,929	352,458	327,095
Crawford Loss Adjusting \| U.S.
Disaggregation of Revenue [Line Items]
Revenues	43,277	34,438	113,999	95,973
Crawford Loss Adjusting \| U.K.
Disaggregation of Revenue [Line Items]
Revenues	27,140	24,568	78,385	77,603
Crawford Loss Adjusting \| Australia
Disaggregation of Revenue [Line Items]
Revenues	18,907	18,855	55,127	51,590
Crawford Loss Adjusting \| Canada
Disaggregation of Revenue [Line Items]
Revenues	13,537	13,797	40,030	42,668
Crawford Loss Adjusting \| Europe
Disaggregation of Revenue [Line Items]
Revenues	12,876	11,631	39,525	36,137
Crawford Loss Adjusting \| Rest of World
Disaggregation of Revenue [Line Items]
Revenues	8,228	7,640	25,392	23,124
Crawford TPA Solutions
Disaggregation of Revenue [Line Items]
Revenues	100,221	88,908	298,840	275,573
Crawford TPA Solutions \| Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	62,743	53,315	186,886	163,336
Crawford TPA Solutions \| Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	37,478	35,593	111,954	112,237
Crawford TPA Solutions \| U.S.
Disaggregation of Revenue [Line Items]
Revenues	75,804	70,726	225,982	217,992
Crawford TPA Solutions \| U.S. \| Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	38,326	35,133	114,028	105,755
Crawford TPA Solutions \| U.S. \| Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	37,478	35,593	111,954	112,237
Crawford TPA Solutions \| U.K.
Disaggregation of Revenue [Line Items]
Revenues	6,063	4,145	16,512	12,385
Crawford TPA Solutions \| U.K. \| Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	6,063	4,145	16,512	12,385
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	4,351	5,489	14,163	17,521
Crawford TPA Solutions \| Canada \| Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	4,351	5,489	14,163	17,521
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	14,003	8,548	42,183	27,675
Crawford TPA Solutions \| Europe and Rest of World \| Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	14,003	8,548	42,183	27,675
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	64,314	53,287	157,840	122,403
Crawford Platform Solutions \| Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	23,621	23,542	69,046	63,328
Crawford Platform Solutions \| Network Business
Disaggregation of Revenue [Line Items]
Revenues	40,693	29,745	88,794	59,075
Crawford Platform Solutions \| U.S.
Disaggregation of Revenue [Line Items]
Revenues	56,473	47,556	136,689	105,090
Crawford Platform Solutions \| U.S. \| Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	18,591	20,076	54,644	53,271
Crawford Platform Solutions \| U.S. \| Network Business
Disaggregation of Revenue [Line Items]
Revenues	37,882	27,480	82,045	51,819
Crawford Platform Solutions \| U.K.
Disaggregation of Revenue [Line Items]
Revenues	2,561	1,354	7,370	5,021
Crawford Platform Solutions \| U.K. \| Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	2,561	1,338	7,352	4,984
Crawford Platform Solutions \| U.K. \| Network Business
Disaggregation of Revenue [Line Items]
Revenues	0	16	18	37
Crawford Platform Solutions \| Canada
Disaggregation of Revenue [Line Items]
Revenues	3,150	2,980	8,416	8,150
Crawford Platform Solutions \| Canada \| Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	1,960	1,786	5,669	4,398
Crawford Platform Solutions \| Canada \| Network Business
Disaggregation of Revenue [Line Items]
Revenues	1,190	1,194	2,747	3,752
Crawford Platform Solutions \| Europe and Rest of World
Disaggregation of Revenue [Line Items]
Revenues	2,130	1,397	5,365	4,142
Crawford Platform Solutions \| Europe and Rest of World \| Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	509	342	1,381	675
Crawford Platform Solutions \| Europe and Rest of World \| Network Business
Disaggregation of Revenue [Line Items]
Revenues	$ 1,621	$ 1,055	$ 3,984	$ 3,467