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Other commitments	6 Months Ended
Other commitments	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Noncontrolling interests subject to put provisions and other commitments	Other commitments The Company has certain other potential commitments to provide operating capital to a number of dialysis centers that are wholly-owned by third parties or businesses in which the Company maintains a noncontrolling equity interest as well as to physician-owned vascular access clinics or medical practices that the Company operates under management and administrative services agreements of approximately $7,154.