Income Taxes - CARES Act (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Income Tax Disclosure [Abstract]
Deferred payroll taxes, CARES Act	$ 48,249
Employee retention employment tax credit, CARES Act	$ 1,183

Employee Retention Employment Tax Credit, CARES Act

No definition available.

Name:	amn_EmployeeRetentionEmploymentTaxCreditCARESAct
Namespace Prefix:	amn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant