Scheduled Amortization Charges from Intangible Assets and Liabilities (Detail) $ in Thousands	12 Months Ended
Dec. 31, 2015 USD ($)
Customer relationships
Expected Amortization Expense [Line Items]
2016	$ 82,617
2017	82,685
2018	82,638
2019	82,408
2020	82,066
Thereafter	909,798
Trade names
Expected Amortization Expense [Line Items]
2016	16,634
2017	16,623
2018	16,235
2019	16,235
2020	16,235
Thereafter	37,320
Provider network and practice management tools
Expected Amortization Expense [Line Items]
2016	26,187
2017	26,250
2018	26,273
2019	22,536
2020	541
Noncompetition and other agreements
Expected Amortization Expense [Line Items]
2016	30,619
2017	29,775
2018	19,545
2019	15,817
2020	10,209
Thereafter	28,543
Other
Expected Amortization Expense [Line Items]
2016	67
2017	102
2018	53
2019	3
2020	2
Lease Agreements
Expected Amortization Expense [Line Items]
2016	(1,549)
2017	(1,228)
2018	(892)
2019	(832)
2020	(678)
Thereafter	$ (3,790)

Expected Amortization Expense [Line Items]

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- Definition

Future amortization expense from intangible liabilities year five.

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Future amortization expense from intangible liabilities year four.

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- Definition

Future Amortization Expense from Intangible Liabilities, Year One

+ References

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- Definition

Future amortization expense from intangible liabilities year thereafter.

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- Definition

Future amortization expense from intangible liabilities year three.

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- Definition

Future Amortization Expense from Intangible Liabilities, Year Two

+ References

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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