Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022
Cash flows from operating activities:
Net income	$ 54,872	$ 55,364
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and leasehold improvements	4,174	3,501
Provision for contract losses and doubtful accounts	1,286	1,470
Stock-based compensation	12,286	11,467
Deferred income tax provision	1,697	(422)
Changes in operating assets and liabilities:
Accounts receivable	(7,002)	(23,383)
Prepaid expenses and other current assets	(21)	(3,163)
Change in operating leases	(657)	(219)
Accounts payable and accrued liabilities	(9,116)	(582)
Accrued payroll and employee benefits	(16,186)	(15,680)
Deferred revenues	(7,491)	(4,537)
Net cash provided by operating activities	33,842	23,816
Cash flows from investing activities:
Capital expenditures	(11,116)	(5,914)
Net cash used in investing activities	(11,116)	(5,914)
Cash flows from financing activities:
Payroll taxes for restricted stock units	(9,920)	(12,904)
Repurchase of common stock		(111,843)
Exercise of stock-based payment awards	1,243	1,070
Dividends and dividend equivalents rights	(27,717)	(24,859)
Net cash used in financing activities	(36,394)	(148,536)
Effect of foreign currency exchange rates on cash and cash equivalents	384	(1,434)
Net change in cash and cash equivalents	(13,284)	(132,068)
Cash and cash equivalents at beginning of period	161,458	297,687
Cash and cash equivalents at end of period	$ 148,174	$ 165,619