CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jul. 01, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 69,453	$ 106,549
Short-term investments	25,569
Accounts receivable, net of allowance for doubtful accounts of $2,136 and $2,126 at July 1, 2011 and December 31, 2010, respectively	76,737	72,034
Prepaid expenses and other assets	7,860	10,585
Deferred income taxes	7,195	5,426
Total current assets	186,814	194,594
Property, equipment and leasehold improvements, net	27,731	27,267
Goodwill	8,607	8,607
Deferred income taxes	13,626	12,940
Deferred compensation plan assets	19,604	15,068
Other assets	443	416
Total assets	256,825	258,892
Current liabilities:
Accounts payable and accrued liabilities	8,847	9,715
Accrued payroll and employee benefits	36,235	41,888
Deferred revenues	4,831	6,131
Total current liabilities	49,913	57,734
Other liabilities	803	413
Deferred compensation	19,425	15,068
Deferred rent	2,016	1,877
Total liabilities	72,157	75,092
Stockholders' equity:
Common stock, $0.001 par value; 100,000 shares authorized; 16,427 shares issued at July 1, 2011 and December 31, 2010	16	16
Additional paid-in capital	106,090	96,089
Accumulated other comprehensive loss	(131)	(451)
Retained earnings	163,717	156,086
Treasury stock, at cost; 2,762 and 2,431 shares held at July 1, 2011 and December 31, 2010, respectively	(85,024)	(67,940)
Total stockholders' equity	184,668	183,800
Total liabilities and stockholders' equity	$ 256,825	$ 258,892