Summary of Significant Accounting Policies - Revised Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total costs and expenses									$ 3,680,976		$ 3,737,444		$ 3,178,393
(Loss) income from continuing operations before income taxes	$ 1,471	$ 6,970	$ 25,791	$ (41,647)	$ 17,449	$ 11,276	$ 16,483	$ (228,577)	(7,415)		(183,369)		26,732
(Benefit) provision for income taxes	(320)	(1,525)	4,915	(13,992)	(350)	541	16,957	(10,026)	(10,922)		7,122		(13,127)
Income (loss) from continuing operations									3,507		(190,491)		39,859
Net (loss) income	$ 1,267	$ 9,067	$ 19,856	$ (31,541)	$ 20,266	$ 11,351	$ (3,506)	$ (208,487)	$ (1,351)		$ (180,376)		$ 194,319
Basic (loss) earnings per share - continuing operations (in dollars per share)	$ 0.01	$ 0.05	$ 0.12	$ (0.16)	$ 0.10	$ 0.06	$ 0	$ (1.28)	$ 0.02	[1]	$ (1.11)	[1]	$ 0.23	[1]
Basic (loss) earnings per share (in dollars per share)	0.01	0.05	0.11	(0.18)	0.12	0.07	(0.02)	(1.22)	(0.01)	[1]	(1.05)	[1]	1.10	[1]
Diluted (loss) earnings per share - continuing operations (in dollars per share)	0.01	0.05	0.12	(0.16)	0.10	0.06	0	(1.28)	0.02	[1]	(1.11)	[1]	0.22	[1]
Diluted (loss) earnings per share (in dollars per share)	$ 0.01	$ 0.05	$ 0.11	$ (0.18)	$ 0.11	$ 0.06	$ (0.02)	$ (1.22)	$ (0.01)	[1]	$ (1.05)	[1]	$ 1.10	[1]
Inventories	$ 78,588				$ 71,480				$ 78,588		$ 71,480
Total current assets	1,892,053				2,112,558				1,892,053		2,112,558
Noncurrent income taxes	68,398				71,244				68,398		71,244
Total assets	4,958,871				5,224,363				4,958,871		5,224,363		$ 5,469,958
Retained earnings	5,169,270				5,205,421				5,169,270		5,205,421
Total stockholders' equity	112,632				70,621				112,632		70,621		289,154		$ 101,842
Total liabilities and stockholders' equity	4,958,871				5,224,363				4,958,871		5,224,363
Deferred tax (benefit) provision									(19,883)		15,280		4,811
(Increase) decrease in inventories									(8,008)		1,582		(5,178)
Equipment sales
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of equipment sales									251,914		235,153		244,620
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total costs and expenses											3,739,007		3,177,983
(Loss) income from continuing operations before income taxes											(184,932)		27,142
(Benefit) provision for income taxes											6,727		(13,007)
Income (loss) from continuing operations											(191,659)		40,149
Net (loss) income											$ (181,544)		$ 194,609
Basic (loss) earnings per share - continuing operations (in dollars per share)											$ (1.12)		$ 0.23
Basic (loss) earnings per share (in dollars per share)											(1.06)		1.10
Diluted (loss) earnings per share - continuing operations (in dollars per share)											(1.12)		0.23
Diluted (loss) earnings per share (in dollars per share)											$ (1.06)		$ 1.10
Inventories	$ 2,000				65,845				2,000		$ 65,845
Total current assets					2,106,923						2,106,923
Noncurrent income taxes					72,653						72,653
Total assets					5,220,137						5,220,137
Retained earnings					5,201,195						5,201,195
Total stockholders' equity					66,395						66,395
Total liabilities and stockholders' equity					5,220,137						5,220,137
Deferred tax (benefit) provision											14,885		$ 4,931
(Increase) decrease in inventories											3,145		(5,588)
Previously Reported | Equipment sales
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of equipment sales									$ 2,000		236,716		244,210
Cumulative effect of accounting change
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total costs and expenses											(1,563)		410
(Loss) income from continuing operations before income taxes											1,563		(410)
(Benefit) provision for income taxes											395		(120)
Income (loss) from continuing operations											1,168		(290)
Net (loss) income											$ 1,168		$ (290)
Basic (loss) earnings per share - continuing operations (in dollars per share)											$ 0.01		$ 0
Basic (loss) earnings per share (in dollars per share)											0.01		0
Diluted (loss) earnings per share - continuing operations (in dollars per share)											0.01		(0.01)
Diluted (loss) earnings per share (in dollars per share)											$ 0.01		$ 0
Inventories					5,635						$ 5,635		$ 4,000
Total current assets					5,635						5,635
Noncurrent income taxes					(1,409)						(1,409)
Total assets					4,226						4,226
Retained earnings					4,226						4,226		3,000
Total stockholders' equity					4,226						4,226
Total liabilities and stockholders' equity					$ 4,226						4,226
Deferred tax (benefit) provision											395		(120)
(Increase) decrease in inventories											(1,563)		410
Cumulative effect of accounting change | Equipment sales
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of equipment sales											$ (1,563)		$ 410

[1] The sum of the earnings per share amounts may not equal the totals due to rounding.