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Components of Changes in Healthcare Costs Payable (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Medical Expense And Medical Claims Payable [Line Items] |  |
Healthcare costs payable, beginning of the period | $ 314,346 |
Less: Claims paid |  |
Healthcare costs payable, end of the period | 332,102 | $ 314,346
Healthcare Cost |  |
Medical Expense And Medical Claims Payable [Line Items] |  |
Healthcare costs payable, beginning of the period | 214,405 | 172,310
Add: Components of incurred healthcare costs |  |
Current year | 1,587,036 | 1,572,723
Prior years | 1,523 | 3,429
Total incurred healthcare costs | 1,588,559 | 1,576,152
Less: Claims paid |  |
Current year | 1,397,378 | 1,378,137
Prior years | 192,945 | 155,920
Total claims paid | 1,590,323 | 1,534,057
Healthcare costs payable, end of the period | $ 212,641 | $ 214,405

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- Definition Carrying amount as of balance sheet date of health care costs payable representing estimated costs of professional medical services provided by non-employed physicians and other providers, as well as inpatient and other ancillary costs for all markets, other than California where state regulation allows for assumption of global risk. + References No definition available. + Details
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- Definition Amount of payments to settle claims incurred in the current period and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount of payments to settle claims incurred in prior periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount of payments to settle insured claims and pay costs incurred in the claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585 + Details
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