Segment reporting (Tables)

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Summary of Segment Net Revenues, Segment Operating Income (Loss) and Reconciliation of Segment Income to Consolidated Income Before Income Taxes

The following is a summary of segment revenues, segment operating margin (loss), and a reconciliation of segment operating margin to consolidated income before income taxes:

	Three months ended March 31,
	2023		2022
Segment revenues:
U.S. dialysis
Dialysis patient service revenues:
External sources	$	2,583,933	$	2,546,961
Intersegment revenues	22,047		22,159
U.S. dialysis patient service revenues	2,605,980		2,569,120
Other revenues:
External sources	6,180		5,966
Intersegment revenues	—		10
Total U.S. dialysis revenues	2,612,160		2,575,096
Other—Ancillary services
Dialysis patient service revenues	176,101		169,320
Other external sources	106,485		95,308
Intersegment revenues	1,368		—
Total ancillary services revenues	283,954		264,628
Total net segment revenues	2,896,114		2,839,724
Elimination of intersegment revenues	(23,415)		(22,169)
Consolidated revenues	$	2,872,699	$	2,817,555
Segment operating margin (loss):
U.S. dialysis	$	361,098	$	406,440
Other—Ancillary services	(24,865)		(32,305)
Total segment operating margin	336,233		374,135
Reconciliation of segment operating income to consolidated income before income  taxes:
Corporate administrative support	(24,588)		(35,827)
Consolidated operating income	311,645		338,308
Debt expense	(100,774)		(73,791)
Other income (loss), net	3,752		(1,786)
Consolidated income before income taxes	$	214,623	$	262,731

Summary of Depreciation and Amortization Expense by Reportable Segment

Depreciation and amortization expense by reportable segment was as follows:

	Three months ended March 31,
	2023		2022
U.S. dialysis	$	166,961	$	162,019
Other—Ancillary services	11,110		10,925
	$	178,071	$	172,944

Summary of Expenditures for Property and Equipment by Reportable Segment

Expenditures for property and equipment by reportable segment were as follows:

	Three months ended March 31,
	2023		2022
U.S. dialysis	$	130,966	$	107,513
Other—Ancillary services	16,739		15,595
	$	147,705	$	123,108

Summary of Assets by Reportable Segment

A summary of assets by reportable segment were as follows:

	March 31, 2023		December 31, 2022
U.S. dialysis	$	14,789,095	$	15,084,454
Other—Ancillary services	1,938,692		1,843,798
Consolidated assets	$	16,727,787	$	16,928,252