Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023
Cash flows from operating activities:
Net income	$ 85,413	$ 79,410
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and leasehold improvements	7,199	6,535
Provision for contract losses and doubtful accounts	3,140	1,911
Stock-based compensation	18,382	17,177
Deferred income tax provision	(521)	(539)
Changes in operating assets and liabilities:
Accounts receivable	(4,398)	(13,551)
Prepaid expenses and other current assets	257	(5,886)
Change in operating leases	1,404	(451)
Accounts payable and accrued liabilities	1,502	(7,094)
Accrued payroll and employee benefits	(15,598)	(13,124)
Deferred revenues	(8,295)	(8,345)
Net cash provided by operating activities	88,485	56,043
Cash flows from investing activities:
Capital expenditures	(4,342)	(14,422)
Net cash used in investing activities	(4,342)	(14,422)
Cash flows from financing activities:
Payroll taxes for restricted stock units	(6,830)	(9,920)
Repurchase of common stock	(5,709)	(16,970)
Exercise of stock-based payment awards	3,739	1,812
Dividends and dividend equivalents rights	(43,988)	(40,894)
Net cash used in financing activities	(52,788)	(65,972)
Effect of foreign currency exchange rates on cash and cash equivalents	1,203	(8)
Net change in cash and cash equivalents	32,558	(24,359)
Cash and cash equivalents at beginning of period	187,150	161,458
Cash and cash equivalents at end of period	$ 219,708	$ 137,099