Condensed Consolidated Income Statements - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Total revenue	$ 393,921,000	$ 331,555,000
Operating expenses:
Selling, general and administrative expenses	126,606,000	114,239,000
Acquisition-related costs	9,637,000	2,922,000
Depreciation and amortization expenses	24,225,000	21,070,000
Foreign exchange loss (gain)	(164,000)	277,000
Total operating expenses	330,901,000	287,121,000
Gain on disposition of property, plant and equipment	(169,820,000)	(68,000)
Operating income	232,840,000	44,502,000
Interest expense	(20,686,000)	(8,946,000)
Change in fair value of derivatives, net	1,263,000
Other income, net	920,000	1,002,000
Income before income taxes	214,337,000	36,558,000
Income tax expense	36,236,000	8,419,000
Net income	178,101,000	28,139,000
Net income (loss) attributable to:
Stockholders	178,094,000	28,188,000
Non-controlling interests	7,000	(49,000)
Net income	$ 178,101,000	$ 28,139,000
Earnings per share attributable to stockholders:
Basic	$ 1.61	$ 0.26
Diluted	$ 1.60	$ 0.25
Weighted average number of shares outstanding:
Basic	110,647,700	109,972,997
Diluted	111,655,861	111,267,392
Service Revenues [Member]
Revenue:
Total revenue	$ 244,861,000	$ 206,030,000
Operating expenses:
Direct expenses	39,015,000	37,866,000
Inventory Sales Revenue [Member]
Revenue:
Total revenue	149,060,000	125,525,000
Operating expenses:
Direct expenses	$ 131,582,000	$ 110,747,000