CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 24, 2017	Sep. 25, 2016
Cash flows from operating activities
Net income/(loss)	$ 64,676	$ (13,795)
Adjustments to reconcile net income to net cash provided by operating activities:
Restructuring charge	0	14,804
Multiemployer pension plan charges	0	11,701
Depreciation and amortization	46,961	46,003
Stock-based compensation expense	10,927	8,561
Undistributed (gain)/loss of joint ventures	(31,464)	41,845
Long-term retirement benefit obligations	(21,897)	(22,366)
Uncertain tax positions	139	53
Other-net	2,609	8,257
Changes in operating assets and liabilities:
Accounts receivable-net	55,032	54,591
Other assets	(1,761)	(21,926)
Accounts payable, accrued payroll and other liabilities	12,473	(45,546)
Unexpired subscriptions	10,200	3,461
Net cash provided by operating activities	147,895	85,643
Cash flows from investing activities
Purchases of marketable securities	(398,246)	(514,809)
Maturities of marketable securities	454,022	522,655
Cash distribution from corporate-owned life insurance	0	38,000
Business acquisitions	0	(15,410)
Purchase of investments – net of proceeds	(422)	(1,840)
Change in restricted cash	7,014	3,816
Capital expenditures	(47,831)	(21,820)
Other-net	1,070	(380)
Net cash provided by investing activities	15,607	10,212
Long-term obligations:
Repayment of debt and capital lease obligations	(414)	(460)
Dividends paid	(19,483)	(19,416)
Capital shares:
Stock issuances	4,142	273
Repurchases	0	(15,684)
Share-based compensation tax withholding	(3,984)	(9,572)
Net cash used in financing activities	(19,739)	(44,859)
Net increase in cash and cash equivalents	143,763	50,996
Effect of exchange rate changes on cash	212	166
Cash and cash equivalents at the beginning of the period	100,692	105,776
Cash and cash equivalents at the end of the period	$ 244,667	$ 156,938