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Guarantor Financial Information (Condensed Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 19,640	$ 98,075
Earnings in investments in subsidiaries	0	0
Other operating cash flows	28,961	(71,151)
Net cash provided by operating activities	48,601	26,924
Cash flows from investing activities:
Capital expenditures	(84,269)	(56,587)
Acquisitions	(1,431)	0
Investment in subsidiaries and affiliates	0	(3,500)
Proceeds from sale of investment in subsidiary	0	2,805
Gross proceeds from disposal of property, plant and equipment and other assets	7,868	1,479
Proceeds from insurance settlement	845	503
Payments related to routes and other intangibles	(2,778)	(15)
Net cash used by investing activities	(79,765)	(55,315)
Cash flows from financing activities:
Proceeds from long-term debt	2,138	3,876
Payments on long-term debt	(10,974)	(9,622)
Borrowings from revolving credit facility	156,829	135,184
Payments on revolving credit facility	(138,147)	(80,019)
Net cash overdraft financing	14,525	(331)
Deferred loan costs	0	(1,094)
Issuance of common stock	12	182
Minimum withholding taxes paid on stock awards	(3,190)	(2,018)
Net cash provided by financing activities	21,193	46,158
Effect of exchange rate changes on cash	(1,575)	(1,672)
Net increase/(decrease) in cash, cash equivalents and restricted cash	(11,546)	16,095
Cash, cash equivalents and restricted cash at beginning of period	107,369	106,916
Cash, cash equivalents and restricted cash at end of period	95,823	123,011
Parent [Member]
Cash flows from operating activities:
Net income	19,640	98,075
Earnings in investments in subsidiaries	(54,627)	(144,880)
Other operating cash flows	52,135	30,782
Net cash provided by operating activities	17,148	(16,023)
Cash flows from investing activities:
Capital expenditures	(34,303)	(12,183)
Acquisitions	(1,157)
Investment in subsidiaries and affiliates		(3,500)
Proceeds from sale of investment in subsidiary		0
Gross proceeds from disposal of property, plant and equipment and other assets	132	828
Proceeds from insurance settlement	0	0
Payments related to routes and other intangibles	0	0
Net cash used by investing activities	(35,328)	(14,855)
Cash flows from financing activities:
Proceeds from long-term debt	0	0
Payments on long-term debt	0	(22)
Borrowings from revolving credit facility	50,000	62,000
Payments on revolving credit facility	(37,000)	(29,000)
Net cash overdraft financing	8,350	0
Deferred loan costs		(1,094)
Issuance of common stock	12	182
Minimum withholding taxes paid on stock awards	(3,190)	(2,013)
Net cash provided by financing activities	18,172	30,053
Effect of exchange rate changes on cash	0	0
Net increase/(decrease) in cash, cash equivalents and restricted cash	(8)	(825)
Cash, cash equivalents and restricted cash at beginning of period	1,098	1,827
Cash, cash equivalents and restricted cash at end of period	1,090	1,002
Guarantors [Member]
Cash flows from operating activities:
Net income	18,521	35,277
Earnings in investments in subsidiaries	0	0
Other operating cash flows	(2,881)	(24,262)
Net cash provided by operating activities	15,640	11,015
Cash flows from investing activities:
Capital expenditures	(23,498)	(13,396)
Acquisitions	0
Investment in subsidiaries and affiliates		0
Proceeds from sale of investment in subsidiary		0
Gross proceeds from disposal of property, plant and equipment and other assets	7,016	321
Proceeds from insurance settlement	845	503
Payments related to routes and other intangibles	0	0
Net cash used by investing activities	(15,637)	(12,572)
Cash flows from financing activities:
Proceeds from long-term debt	0	0
Payments on long-term debt	(2)	0
Borrowings from revolving credit facility	0	0
Payments on revolving credit facility	0	0
Net cash overdraft financing	0	0
Deferred loan costs		0
Issuance of common stock	0	0
Minimum withholding taxes paid on stock awards	0	0
Net cash provided by financing activities	(2)	0
Effect of exchange rate changes on cash	0	0
Net increase/(decrease) in cash, cash equivalents and restricted cash	1	(1,557)
Cash, cash equivalents and restricted cash at beginning of period	32	2,993
Cash, cash equivalents and restricted cash at end of period	33	1,436
Non-guarantors [Member]
Cash flows from operating activities:
Net income	36,106	109,603
Earnings in investments in subsidiaries	0	0
Other operating cash flows	(20,293)	(77,671)
Net cash provided by operating activities	15,813	31,932
Cash flows from investing activities:
Capital expenditures	(26,468)	(31,008)
Acquisitions	(274)
Investment in subsidiaries and affiliates		0
Proceeds from sale of investment in subsidiary		2,805
Gross proceeds from disposal of property, plant and equipment and other assets	720	330
Proceeds from insurance settlement	0	0
Payments related to routes and other intangibles	(2,778)	(15)
Net cash used by investing activities	(28,800)	(27,888)
Cash flows from financing activities:
Proceeds from long-term debt	2,138	3,876
Payments on long-term debt	(10,972)	(9,600)
Borrowings from revolving credit facility	106,829	73,184
Payments on revolving credit facility	(101,147)	(51,019)
Net cash overdraft financing	6,175	(331)
Deferred loan costs		0
Issuance of common stock	0	0
Minimum withholding taxes paid on stock awards	0	(5)
Net cash provided by financing activities	3,023	16,105
Effect of exchange rate changes on cash	(1,575)	(1,672)
Net increase/(decrease) in cash, cash equivalents and restricted cash	(11,539)	18,477
Cash, cash equivalents and restricted cash at beginning of period	106,239	102,096
Cash, cash equivalents and restricted cash at end of period	94,700	120,573
Eliminations [Member]
Cash flows from operating activities:
Net income	(54,627)	(144,880)
Earnings in investments in subsidiaries	54,627	144,880
Other operating cash flows	0	0
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Acquisitions	0
Investment in subsidiaries and affiliates		0
Proceeds from sale of investment in subsidiary		0
Gross proceeds from disposal of property, plant and equipment and other assets	0	0
Proceeds from insurance settlement	0	0
Payments related to routes and other intangibles	0	0
Net cash used by investing activities	0	0
Cash flows from financing activities:
Proceeds from long-term debt	0	0
Payments on long-term debt	0	0
Borrowings from revolving credit facility	0	0
Payments on revolving credit facility	0	0
Net cash overdraft financing	0	0
Deferred loan costs		0
Issuance of common stock	0	0
Minimum withholding taxes paid on stock awards	0	0
Net cash provided by financing activities	0	0
Effect of exchange rate changes on cash	0	0
Net increase/(decrease) in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	$ 0	$ 0

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