Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 92,274	$ (81)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	213,792	207,947
Gain on disposal of property and equipment	(221)	(7,511)
Asset impairment charges		125
Loss on extinguishment of debt		42,149
Amortization and write-off of deferred financing costs	2,358	4,866
Amortization of Senior Notes original issue premium		(1,664)
Insurance proceeds relating to operating activities		7,083
Insurance benefit in net loss		(7,083)
Deferred tax provision	18,075	234
Share-based compensation expense	8,553	9,667
Provision for doubtful accounts	8,975	5,991
Changes in operating assets and liabilities, net of business acquisitions:
Increase in receivables	(188,565)	(77,336)
Decrease (increase) in inventories	4,179	(62,606)
(Increase) decrease in prepaid expenses and other assets	(20,660)	6,303
Increase in accounts payable and bank checks outstanding	276,493	275,484
Decrease in accrued expenses and other liabilities	(46,807)	(102,155)
Net cash provided by operating activities	368,446	301,413
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of businesses—net of cash	(134,808)	(94,938)
Proceeds from sales of property and equipment	1,679	8,665
Purchases of property and equipment	(107,967)	(66,743)
Proceeds from redemption of industrial revenue bonds	22,139
Investment in Avero, LLC		(7,658)
Net cash used in investing activities	(218,957)	(160,674)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt borrowings	1,117,267	1,410,994
Proceeds from debt refinancings		2,213,803
Principal payments on debt and capital leases	(1,212,792)	(3,208,276)
Repayment of industrial revenue bonds	(22,139)
Redemption of Old Senior Notes		(1,376,927)
Payment for debt financing costs and fees	(426)	(25,629)
Proceeds from initial public offering		1,113,799
Cash distribution to shareholders		(666,332)
Contingent consideration paid for business acquisition	(5,000)
Proceeds from employee share purchase plan	7,729
Proceeds from exercise of stock options	10,944
Tax withholding payments for net share-settled equity awards	(25,693)
Proceeds from common stock sales		2,850
Common stock and share-based awards settled	(497)	(7,417)
Net cash used in financing activities	(130,607)	(543,135)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	18,882	(402,396)
CASH AND CASH EQUIVALENTS—Beginning of period	131,090	517,802
CASH AND CASH EQUIVALENTS—End of period	149,972	115,406
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest (net of amounts capitalized)	79,135	137,828
Income taxes paid—net	2,862	3,708
NON-CASH INVESTING AND FINANCING ACTIVITIES
Property and equipment purchases included in accounts payable	17,405	12,695
Capital lease additions	60,730	63,984
Cashless exercise of equity awards	25,535
Contingent consideration payable for business acquisitions	$ 4,200	$ 6,375