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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		$ 162,567	$ 175,446	$ 186,964
Unrealized net gains (losses) arising during the year		(4,966)	1,036	(18,014)
Ending balance		186,928	162,567	175,446
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(35,850)	(36,352)
Other comprehensive income before reclassifications		4,595	502
Unrealized net gains (losses) arising during the year		0	0
Amounts reclassified from accumulated other comprehensive income	[1]	0	0
Net current period other comprehensive income		4,595	502
Acquisition/Disposition of noncontrolling interest		463
Ending balance		(30,792)	(35,850)	(36,352)
Retirement Liabilities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(171,057)	(180,095)
Other comprehensive income before reclassifications		0	0
Unrealized net gains (losses) arising during the year		(4,966)	1,036
Amounts reclassified from accumulated other comprehensive income	[1]	7,959	8,002
Net current period other comprehensive income		2,993	9,038
Acquisition/Disposition of noncontrolling interest		0
Ending balance		(168,064)	(171,057)	(180,095)
AOCL Attributable to Shareholders of Crawford & Company
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(206,907)	(216,447)	(196,477)
Other comprehensive income before reclassifications		4,595	502
Unrealized net gains (losses) arising during the year		(4,966)	1,036
Amounts reclassified from accumulated other comprehensive income	[1]	7,959	8,002
Net current period other comprehensive income		7,588	9,540
Acquisition/Disposition of noncontrolling interest		463
Ending balance		$ (198,856)	$ (206,907)	$ (216,447)
[1] Retirement liabilities reclassified to net income are related to the amortization of actuarial losses and are included in "Selling, general, and administrative expenses" in the Company's Consolidated Statements of Operations. See Note 8, "Retirement Plans" for additional details.

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Other comprehensive income loss acquisition and disposition of noncontrolling interest.

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