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Summary of Significant Accounting Policies - Schedule of Changes in Allowance for Doubtful Accounts and Contractual Allowance (Parenthetical) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 31, 2018 | Jun. 30, 2018 | Sep. 30, 2018
Receivables [Abstract] |  |  |
Allowance for contractual adjustments increased | $ 1.4 | $ 2.0 | $ 2.7
Provision for doubtful accounts reduced | $ 1.4 | $ 2.0 | 2.7
Contractual adjustments increased |  |  | 0.6
Allowance for contractual adjustments reduced |  |  | $ 0.6

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- Definition Increase decrease in accounts receivable allowance for contractual adjustments. + References No definition available. + Details
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- Definition Increase decrease in accounts receivable contractual adjustments. + References No definition available. + Details
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