Consolidated Income Statements - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue:
Total revenue	$ 1,733,808	$ 1,416,971	$ 1,377,260
Operating expenses:
Selling, general and administrative	539,933	456,203	410,291
Acquisition-related costs	37,261	30,197	6,014
Depreciation and amortization	97,155	87,889	74,921
Foreign exchange (gain) loss	(954)	792	1,612
Total operating expenses	1,450,096	1,178,260	1,115,659
Gain on disposition of property, plant and equipment	170,833	1,436	1,559
Operating income	454,545	240,147	263,160
Interest expense	(57,880)	(36,993)	(35,568)
Interest income	6,971	1,402	2,337
Change in fair value of derivatives, net	1,263	(1,248)
Other income, net	1,089	1,924	5,959
Income before income taxes	405,988	205,232	235,888
Income tax expense	86,230	53,378	65,530
Net income	319,758	151,854	170,358
Net income attributable to:
Stockholders	319,657	151,868	170,095
Non-controlling interests	101	(14)	263
Net income	$ 319,758	$ 151,854	$ 170,358
Earnings per share attributable to stockholders:
Basic	$ 2.89	$ 1.38	$ 1.56
Diluted	$ 2.86	$ 1.36	$ 1.54
Weighted average number of shares outstanding:
Basic	110,781,282	110,315,782	109,054,493
Diluted	111,886,025	111,406,830	110,310,984
Service Revenues [Member]
Revenue:
Total revenue	$ 1,050,583	$ 917,759	$ 871,596
Operating expenses:
Direct expenses	168,127	155,258	164,528
Inventory Sales Revenue [Member]
Revenue:
Total revenue	683,225	499,212	505,664
Operating expenses:
Direct expenses	$ 608,574	$ 447,921	$ 458,293