Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 27, 2014	Sep. 28, 2013
OPERATING ACTIVITIES OF CONTINUING OPERATIONS
Net income	$ 100,318	$ 86,452
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Discontinued operations		(2,706)
Depreciation and amortization of operating property	20,419	20,743
Non-cash interest charges	164	164
Provisions for losses on trade and other accounts receivable	3,823	2,445
Gains on sales/disposals of operating property	(1,955)	(2,933)
Deferred income taxes, net	(3,346)	4,730
Stock-based compensation	4,218	4,133
Changes in operating assets and liabilities, net of discontinued operations:
Increase in trade and other accounts receivable	(19,021)	(16,293)
Increase in other assets	(2,427)	(2,032)
Increase in accounts payable	45,407	8,246
Decrease in other liabilities	(10,998)	(4,231)
Increase (decrease) in insurance claims	(64,005)	26,575
NET CASH PROVIDED BY OPERATING ACTIVITIES OF CONTINUING OPERATIONS	72,597	125,293
INVESTING ACTIVITIES OF CONTINUING OPERATIONS
Net change in other short-term investments	(4,979)	(4,091)
Sales and maturities of investments	25,027	33,265
Purchases of investments	(26,425)	(44,596)
Purchases of operating property	(9,131)	(4,800)
Proceeds from sales of operating property	6,160	8,662
NET CASH USED BY INVESTING ACTIVITIES OF CONTINUING OPERATIONS	(9,348)	(11,560)
FINANCING ACTIVITIES OF CONTINUING OPERATIONS
Increase (decrease) in cash overdraft	4,452	(3,144)
Dividends paid	(24,472)
Proceeds from exercises of stock options	2,974	2,253
Taxes paid in lieu of shares issued related to stock-based compensation plans	(2,419)	(1,767)
Excess tax effect on stock option exercises	1,327	343
Purchases of common stock	(56,393)	(46,603)
Principal payments on long-term debt and capital lease obligations	(28,111)	(44,002)
NET CASH USED BY FINANCING ACTIVITIES OF CONTINUING OPERATIONS	(102,642)	(92,920)
Cash flows from discontinued operations:
Operating activities of discontinued operations		6,514
Investing activities of discontinued operations		(66)
Financing activities of discontinued operations		(3,609)
Net cash provided by discontinued operations		2,839
Effect of exchange rate changes on cash and cash equivalents	(318)	(384)
Increase (decrease) in cash and cash equivalents	(39,711)	23,268
Cash and cash equivalents at beginning of period	180,302	74,284
Cash and cash equivalents at end of period	$ 140,591	$ 97,552

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-Section 45

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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-Glossary Financing Activities

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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-Name Regulation S-X (SX)

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The cash outflow associated with security instruments that either represent a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes repayments of (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c).

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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