Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 29, 2017	Dec. 30, 2016
Current assets:
Cash and cash equivalents	$ 89,809	$ 114,967
Short-term investments	75,782	58,755
Accounts receivable, net of allowance for contract losses and doubtful accounts of $3,847 and $3,417 at September 29, 2017 and December 30, 2016, respectively	124,803	87,409
Prepaid expenses and other assets	10,692	12,913
Total current assets	301,086	274,044
Property, equipment and leasehold improvements, net	35,180	36,710
Goodwill	8,607	8,607
Deferred income taxes	42,574	42,166
Deferred compensation plan assets	46,678	41,153
Other assets	1,515	1,064
Total assets	435,640	403,744
Current liabilities:
Accounts payable and accrued liabilities	13,813	10,073
Accrued payroll and employee benefits	59,696	62,539
Deferred revenues	7,776	7,624
Total current liabilities	81,285	80,236
Other liabilities	2,161	2,005
Deferred compensation	50,778	46,503
Deferred rent	1,340	1,654
Total liabilities	135,564	130,398
Stockholders’ equity:
Common stock, $0.001 par value; 80,000 shares authorized; 32,853 shares issued at September 29, 2017 and December 30, 2016	33	33
Additional paid-in capital	208,583	194,632
Accumulated other comprehensive income (loss)
Investment securities, available-for-sale	(129)	(146)
Foreign currency translation adjustments	(1,934)	(2,980)
Accumulated other comprehensive income (loss)	(2,063)	(3,126)
Retained earnings	313,277	291,243
Treasury stock, at cost; 7,043 and 7,256 shares held at September 29, 2017 and December 30, 2016, respectively	(219,754)	(209,436)
Total stockholders’ equity	300,076	273,346
Total liabilities and stockholders’ equity	$ 435,640	$ 403,744