Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
OPERATING ACTIVITIES
Net income	$ 22,867	$ 38,133
Adjustments to reconcile net income to cash used in operating activities:
Depreciation and amortization	66,217	64,828
Deferred income taxes	674	213
Gain on sale of business units, property and equipment	(2,410)	(1,695)
Adjustment to carrying value of assets	5,075	2,584
Amortization of deferred financing costs	1,142	967
Stock-based compensation	8,895	6,477
Contributions to U.S. pension plan	(1,619)	(3,021)
Amortization of U.S. pension expense	3,450	4,450
Other items, net	12,353	1,690
Net change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable	(90,892)	(97,942)
Inventories	(34,885)	(30,208)
Other assets	(5,068)	220
Accounts payable and accrued expenses	52,479	47,145
Change in short term and long-term tax liabilities	37	8,764
Net cash provided by operating activities	38,315	42,605
INVESTING ACTIVITIES
Purchases of property and equipment	(34,951)	(41,108)
Proceeds from sale of business units, property and equipment	8,497	6,489
Purchase of intangible assets	(11,586)	(22,118)
Purchases of businesses, net of cash acquired	0	(57,264)
Cash received for notes receivable	27	244
Net cash used in investing activities	(38,013)	(113,757)
FINANCING ACTIVITIES
Change in long-term debt	234,296	95,400
Common stock issued for exercise of options	79	1,482
Common stock repurchased	(5,000)	(19,994)
Payments to tax authorities for employee share-based compensation	(932)	(619)
Net cash provided by financing activities	228,443	76,269
Effect of foreign currency exchange rates on cash	(184)	733
Net increase in cash and cash equivalents	228,561	5,850
Cash, cash equivalents and restricted cash, beginning	229,876	117,623
Cash, cash equivalents and restricted cash, ending	$ 458,437	$ 123,473