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Fair Value Measurements - Summarizes Carrying Value and Estimated Fair Values of Financial Instruments not Carried at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Surplus Note [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Carrying Value	$ 14,338	$ 15,809
Surplus Note [Member] | Level 3 [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Estimated Fair Value	13,282	14,166
Term Loan [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Carrying Value		6,851
Term Loan [Member] | Level 3 [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Estimated Fair Value		6,851
Promissory Note [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Carrying Value	690	1,390
Promissory Note [Member] | Level 3 [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Estimated Fair Value	$ 690	$ 1,390

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	instant

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- Details

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- Details

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- Details

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