Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Net Income (Loss) Attributable to Shareholders of Crawford & Company per Common Share - Additional Information (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	May 09, 2019
Class A Non-Voting
Equity, Class of Treasury Stock
Shares repurchased (shares)	166,151	0	256,213	155,351
Average cost (USD per share)	$ 9.65		$ 9.09	$ 8.42
Class B Voting
Equity, Class of Treasury Stock
Shares repurchased (shares)	22,115	0	80,952	161,459
Average cost (USD per share)	$ 9.32		$ 8.28	$ 8.42
Repurchase Authorization 2019 \| Common Stock
Equity, Class of Treasury Stock
Number of shares authorized to be repurchased (shares)					2,000,000
Number of shares remaining to be repurchased (shares)	304,932		304,932