CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Cash flows from operating activities
Net income	$ 56,516	$ 55,327
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,816	30,098
Amortization of right of use asset	4,645	3,520
Stock-based compensation expense	7,482	6,826
Deferred income taxes	1,209	0
Gain on non-marketable equity investment	(10,074)	(1,886)
Long-term retirement benefit obligations	(8,524)	(11,574)
Fair market value adjustment on life insurance products	170	(2,048)
Other-net	1,514	(7,801)
Changes in operating assets and liabilities:
Accounts receivable-net	91,310	59,673
Other assets	(1,292)	(14,555)
Accounts payable, accrued payroll and other liabilities	(64,019)	(57,217)
Unexpired subscriptions	11,255	3,637
Net cash provided by operating activities	118,590	64,000
Cash flows from investing activities
Purchases of marketable securities	(278,773)	(225,765)
Maturities of marketable securities	228,938	223,327
Business acquisitions	(8,055)	0
Proceeds from sale of investments – net	4,074	110
Capital expenditures	(21,510)	(23,065)
Other-net	2,388	1,872
Net cash used in investing activities	(72,938)	(23,521)
Long-term obligations:
Repayment of debt and finance lease obligations	0	(230)
Dividends paid	(18,359)	(14,936)
Capital shares:
Proceeds from stock option exercises	1,873	2,965
Share-based compensation tax withholding	(11,706)	(15,649)
Net cash used in financing activities	(28,192)	(27,850)
Net increase in cash, cash equivalents and restricted cash	17,460	12,629
Effect of exchange rate changes on cash	162	305
Cash, cash equivalents and restricted cash at the beginning of the period	247,518	259,799
Cash, cash equivalents and restricted cash at the end of the period	$ 265,140	$ 272,733