Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 1,047,627	$ 1,122,979	$ 1,163,709
U.S. Claims Services
Disaggregation of Revenue [Line Items]
Revenues	339,837	361,053
U.S. Claims Services | U.S.
Disaggregation of Revenue [Line Items]
Revenues	136,524	150,777
U.S. Claims Services | U.K.
Disaggregation of Revenue [Line Items]
Revenues	63,715	64,940
U.S. Claims Services | Canada
Disaggregation of Revenue [Line Items]
Revenues	47,712	50,224
U.S. Claims Services | Australia
Disaggregation of Revenue [Line Items]
Revenues	45,417	44,666
U.S. Claims Services | Europe
Disaggregation of Revenue [Line Items]
Revenues	28,915	30,971
U.S. Claims Services | Rest of World
Disaggregation of Revenue [Line Items]
Revenues	17,554	19,475
Crawford TPA Solutions
Disaggregation of Revenue [Line Items]
Revenues	393,856	405,335
Crawford TPA Solutions | U.S.
Disaggregation of Revenue [Line Items]
Revenues	315,241	321,744
Crawford TPA Solutions | U.K.
Disaggregation of Revenue [Line Items]
Revenues	11,254	12,651
Crawford TPA Solutions | Canada
Disaggregation of Revenue [Line Items]
Revenues	33,234	36,648
Crawford TPA Solutions | Europe and Rest of World
Disaggregation of Revenue [Line Items]
Revenues	34,127	34,292
Crawford TPA Solutions | Claims Management Services
Disaggregation of Revenue [Line Items]
Revenues	223,600	233,970
Crawford TPA Solutions | Claims Management Services | U.S.
Disaggregation of Revenue [Line Items]
Revenues	144,985	150,379
Crawford TPA Solutions | Claims Management Services | U.K.
Disaggregation of Revenue [Line Items]
Revenues	11,254	12,651
Crawford TPA Solutions | Claims Management Services | Canada
Disaggregation of Revenue [Line Items]
Revenues	33,234	36,648
Crawford TPA Solutions | Claims Management Services | Europe and Rest of World
Disaggregation of Revenue [Line Items]
Revenues	34,127	34,292
Crawford TPA Solutions | Medical Management Services
Disaggregation of Revenue [Line Items]
Revenues	170,256	171,365
Crawford TPA Solutions | Medical Management Services | U.S.
Disaggregation of Revenue [Line Items]
Revenues	170,256	171,365
Crawford TPA Solutions | Medical Management Services | Europe and Rest of World
Disaggregation of Revenue [Line Items]
Revenues	0
Crawford Specialty Solutions
Disaggregation of Revenue [Line Items]
Revenues	272,109	304,583
Crawford Specialty Solutions | U.S.
Disaggregation of Revenue [Line Items]
Revenues	117,440	143,166
Crawford Specialty Solutions | U.K.
Disaggregation of Revenue [Line Items]
Revenues	51,368	54,060
Crawford Specialty Solutions | Canada
Disaggregation of Revenue [Line Items]
Revenues	33,492	34,204
Crawford Specialty Solutions | Australia
Disaggregation of Revenue [Line Items]
Revenues	23,065	24,661
Crawford Specialty Solutions | Europe
Disaggregation of Revenue [Line Items]
Revenues	20,550	21,722
Crawford Specialty Solutions | Rest of World
Disaggregation of Revenue [Line Items]
Revenues	26,194	26,770
Crawford Specialty Solutions | U.S. Technical Services
Disaggregation of Revenue [Line Items]
Revenues	181,317	183,423
Crawford Specialty Solutions | U.S. Technical Services | U.S.
Disaggregation of Revenue [Line Items]
Revenues	40,526	40,452
Crawford Specialty Solutions | U.S. Technical Services | U.K.
Disaggregation of Revenue [Line Items]
Revenues	45,803	45,927
Crawford Specialty Solutions | U.S. Technical Services | Canada
Disaggregation of Revenue [Line Items]
Revenues	25,981	25,065
Crawford Specialty Solutions | U.S. Technical Services | Australia
Disaggregation of Revenue [Line Items]
Revenues	22,273	23,491
Crawford Specialty Solutions | U.S. Technical Services | Europe
Disaggregation of Revenue [Line Items]
Revenues	20,540	21,718
Crawford Specialty Solutions | U.S. Technical Services | Rest of World
Disaggregation of Revenue [Line Items]
Revenues	26,194	26,770
Crawford Specialty Solutions | Contractor Connection
Disaggregation of Revenue [Line Items]
Revenues	90,792	91,285
Crawford Specialty Solutions | Contractor Connection | U.S.
Disaggregation of Revenue [Line Items]
Revenues	76,914	73,887
Crawford Specialty Solutions | Contractor Connection | U.K.
Disaggregation of Revenue [Line Items]
Revenues	5,565	8,133
Crawford Specialty Solutions | Contractor Connection | Canada
Disaggregation of Revenue [Line Items]
Revenues	7,511	8,091
Crawford Specialty Solutions | Contractor Connection | Australia
Disaggregation of Revenue [Line Items]
Revenues	792	1,170
Crawford Specialty Solutions | Contractor Connection | Europe
Disaggregation of Revenue [Line Items]
Revenues	10	4
Crawford Specialty Solutions | Contractor Connection | Rest of World
Disaggregation of Revenue [Line Items]
Revenues	0	0
Crawford Specialty Solutions | Garden City Group
Disaggregation of Revenue [Line Items]
Revenues		29,875
Crawford Specialty Solutions | Garden City Group | Canada
Disaggregation of Revenue [Line Items]
Revenues		$ 1,048