Commitments and Contingencies Concentrations (Details) - Total Medicaid and Medicare |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018
Rate
|
Dec. 31, 2017
Rate
|
Dec. 31, 2016
Rate
|
|
Concentration Risk [Line Items] | |||
Accounts receivable by payor as a percent of total accounts receivable | 60.60% | 56.70% | |
% of Revenue | 68.50% | 68.40% | 67.80% |