CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Total revenue	$ 707,059	$ 604,569
Costs and expenses:
Selling, general and administrative	129,901	122,574
Amortization of intangible assets	27,879	19,411
Operating income	94,281	69,792
Other income (expense):
Interest income	316	179
Interest expense	(15,067)	(9,987)
Other (expense) income, net	(24,071)	6,306
Income from operations, before income taxes	55,459	66,290
Provision for income taxes	4,622	10,602
Net income	50,837	55,688
Less: Net income attributable to noncontrolling interests	68	555
Net income attributable to common shareholders	$ 50,769	$ 55,133
Earnings per common share
Basic (in dollars per share)	$ 1.03	$ 1.14
Diluted (in dollars per share)	$ 1.02	$ 1.11
Weighted-average number of common shares outstanding:
Basic (in shares)	49,189	48,458
Diluted (in shares)	49,966	49,462
Service
Total revenue	$ 546,592	$ 450,942
Costs and expenses:
Cost of services provided and products sold (excluding amortization of intangible assets)	372,824	316,800
Product
Total revenue	160,467	153,627
Costs and expenses:
Cost of services provided and products sold (excluding amortization of intangible assets)	$ 82,174	$ 75,992