Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Jan. 01, 2021
Current assets:
Cash and cash equivalents	$ 297,687	$ 197,525
Short-term investments		45,001
Accounts receivable, net of allowance for contract losses and doubtful accounts of $4,423 and $3,995, respectively	139,861	111,565
Prepaid expenses and other current assets	15,214	12,741
Total current assets	452,762	366,832
Property, equipment and leasehold improvements, net	59,971	59,823
Operating lease right-of-use assets	14,370	19,322
Goodwill	8,607	8,607
Deferred income taxes	46,546	40,539
Deferred compensation plan assets	99,962	83,731
Other assets	1,521	1,242
Total assets	683,739	580,096
Current liabilities:
Accounts payable and accrued liabilities	24,504	16,327
Accrued payroll and employee benefits	103,552	83,194
Deferred revenues	19,762	11,800
Operating lease liabilities	5,164	5,987
Total current liabilities	152,982	117,308
Other liabilities	2,886	2,986
Deferred compensation plan liabilities	100,999	83,961
Operating lease liabilities	9,807	14,343
Total liabilities	266,674	218,598
Commitments and contingencies (Note 13)
Stockholders’ equity:
Preferred stock, $0.001 par value; 2,000 shares authorized; no shares outstanding
Common stock, $0.001 par value; 120,000 shares authorized; 65,707 shares issued	66	66
Additional paid-in capital	281,419	265,328
Accumulated other comprehensive income/(loss)
Investment securities, available for sale		65
Foreign currency translation adjustments	(1,983)	(1,997)
Accumulated other comprehensive income (loss)	(1,983)	(1,932)
Retained earnings	478,370	421,809
Treasury stock, at cost: 13,591 and 13,903 shares held, respectively	(340,807)	(323,773)
Total stockholders’ equity	417,065	361,498
Total liabilities and stockholders’ equity	$ 683,739	$ 580,096