Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 187,825	$ 132,930
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	294,685	313,985
Gain on disposal of property and equipment—net	(120)	(4,727)
Tangible asset impairment charges	100	125
LOSS ON EXTINGUISHMENT OF DEBT		53,632
Amortization and write-off of deferred financing costs	3,433	6,175
Amortization of Senior Notes original issue premium		(1,664)
Insurance proceeds relating to operating activities		10,499
Insurance benefit in net income		(10,499)
Deferred tax provision (benefit)	31,581	(82,292)
Share-based compensation expense	15,060	14,429
Provision for doubtful accounts	12,901	7,334
Changes in operating assets and liabilities, net of business acquisitions:
Increase in receivables	(242,229)	(149,789)
Increase in inventories	(55,921)	(98,876)
(Increase) decrease in prepaid expenses and other assets	(18,151)	5,495
Increase in accounts payable and bank checks outstanding	278,487	330,818
Decrease in accrued expenses and other liabilities	(1,268)	(87,893)
Net cash provided by operating activities	506,383	439,682
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses—net of cash	(182,823)	(94,938)
Proceeds from sales of property and equipment	2,371	10,888
Purchases of property and equipment	(162,995)	(105,093)
Proceeds from redemption of industrial revenue bonds	22,139
Investment in marketable securities		(484,624)
Investment in Avero, LLC		(7,658)
Net cash used in investing activities	(321,308)	(681,425)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt borrowings	1,711,068	1,935,994
Proceeds from debt refinancings		2,213,803
Principal payments on debt and capital leases	(1,848,732)	(3,315,621)
Repayment of industrial revenue bonds	(22,139)
Redemption of Old Senior Notes		(1,376,927)
Payment for debt financing costs and fees	(1,256)	(25,941)
Proceeds from initial public offering		1,113,799
Cash distribution to shareholders		(666,332)
Contingent consideration paid for business acquisition	(6,375)
Proceeds from employee share purchase plan	12,077
Proceeds from exercise of stock options	14,904
Tax withholding payments for net share-settled equity awards	(27,812)
Proceeds from common stock sales		2,850
Common stock and share-based awards settled	(538)	(7,708)
Net cash used in financing activities	(168,803)	(126,083)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	16,272	(367,826)
CASH AND CASH EQUIVALENTS—Beginning of period	131,090	517,802
CASH AND CASH EQUIVALENTS—End of period	147,362	149,976
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest (net of amounts capitalized)	106,132	175,370
Income taxes paid—net	4,885	4,119
NON-CASH INVESTING AND FINANCING ACTIVITIES
Property and equipment purchases included in accounts payable	18,656	13,691
Capital lease additions	76,554	77,012
Cashless exercise of equity awards	29,195
Contingent consideration payable for business acquisitions	$ 4,200	6,375
Marketable securities transferred in connection with the legal defeasance of the CMBS Fixed Loan Facility		484,624
CMBS Fixed Loan Facility defeasance		$ 471,615