Acquisitions - Consideration and Allocation (Details) - USD ($) $ in Thousands				6 Months Ended
	Jun. 01, 2021	Apr. 30, 2021	Feb. 01, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Deferred payments				$ 422	$ 983
Estimated fair values of net assets acquired
Goodwill				3,515,612		$ 3,512,567
Receipt of working capital adjustment from prior year acquisitions					600
Significant Acquisitions In 2022 [Member]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Cash				16,377
Deferred payments				422
Total				16,799
Estimated fair values of net assets acquired
Cash				155
Accounts receivable				2,476
Inventory				797
Prepaid and other current assets				3
Equipment and other fixed assets				11,219
Goodwill				4,591
Identifiable intangible assets				500
Accounts payable and accrued expenses				(2,942)
Net assets acquired				16,799
Significant Acquisitions In 2021 [Member]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Cash					1,325,133
Equity					1,235,693
Contingent consideration					1,000
Deferred payments					983
Total					2,562,809
Estimated fair values of net assets acquired
Cash					31,944
Accounts receivable					97,523
Inventory					39,525
Prepaid and other current assets					4,828
Equipment and other fixed assets					179,761
Goodwill					2,254,990
Identifiable intangible assets					142,000
Other assets					1,194
Deferred tax liabilities					(63,222)
Accounts payable and accrued expenses					(96,325)
Contract liabilities					(14,583)
Other current liabilities					(11,576)
Other long-term liabilities					(1,055)
Capital lease obligations					(2,195)
Net assets acquired					2,562,809
Receipt of working capital adjustment from prior year acquisitions				$ 900
AeroCare Holdings [Member]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Cash			$ 1,100,000		1,148,695
Equity					1,220,342
Total					2,369,037
Estimated fair values of net assets acquired
Cash					27,686
Accounts receivable					75,916
Inventory					27,612
Prepaid and other current assets					3,522
Equipment and other fixed assets					163,465
Goodwill					2,103,464
Identifiable intangible assets					138,200
Other assets					1,178
Deferred tax liabilities					(63,713)
Accounts payable and accrued expenses					(82,722)
Contract liabilities					(14,495)
Other current liabilities					(10,021)
Other long-term liabilities					(1,055)
Net assets acquired					2,369,037
Other acquisitions in 2021 [Member]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Cash					63,289
Equity					3,185
Deferred payments					983
Total					67,457
Estimated fair values of net assets acquired
Cash					1,546
Accounts receivable					6,813
Inventory					4,026
Prepaid and other current assets					900
Equipment and other fixed assets					12,671
Goodwill					46,085
Identifiable intangible assets					1,500
Deferred tax asset					491
Accounts payable and accrued expenses					(4,932)
Contract liabilities					(88)
Other current liabilities					(1,555)
Net assets acquired					67,457
Spiro Health Services [Member]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Cash		$ 66,100			66,101
Equity					7,109
Contingent consideration					1,000
Total					74,210
Maximum potential contingent consideration		$ 1,000
Estimated fair values of net assets acquired
Cash					2,132
Accounts receivable					7,323
Inventory					4,939
Prepaid and other current assets					152
Equipment and other fixed assets					2,148
Goodwill					63,762
Identifiable intangible assets					1,000
Other assets					16
Accounts payable and accrued expenses					(5,067)
Capital lease obligations					(2,195)
Net assets acquired					74,210
Healthy Living Medical Supply, L L C [Member]
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination [Abstract]
Cash	$ 47,000				47,048
Equity					5,057
Total					52,105
Estimated fair values of net assets acquired
Cash					580
Accounts receivable					7,471
Inventory					2,948
Prepaid and other current assets					254
Equipment and other fixed assets					1,477
Goodwill					41,679
Identifiable intangible assets					1,300
Accounts payable and accrued expenses					(3,604)
Net assets acquired					$ 52,105