Stockholders' Equity (Number And Cost Of Employee Stock Plan Repurchases) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Stockholders' Equity [Abstract]
Employee stock plan repurchased (in shares)	909	45
Employee stock plan repurchased	$ 26,907	$ 1,438

Value of shares repurchased in connection with employee stock plans, whereby Company shares were tendered by employees for the payment of applicable withholding taxes and/or exercise price.

No definition available.

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Namespace Prefix:	rhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration