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Commitments and Contingencies (Legal Proceedings) - Additional Information (Detail) $ in Millions |  | 6 Months Ended
--- | --- | ---
Sep. 16, 2016 USD ($) | Jun. 30, 2017 USD ($) Plaintiff
Baldino Group [Member] |  |
Commitments And Contingencies [Line Items] |  |
Number of Plaintiffs | Plaintiff |  | 2
Damages sought amount |  | $ 16
Altoona Regional Health System [Member] | Minimum [Member] |  |
Commitments And Contingencies [Line Items] |  |
Damages sought amount | $ 142 |

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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