Dividend Payment Date Day Month And Year

No definition available.

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- Definition

Payments of extraordinary dividends.

+ References

No definition available.

+ Details

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- Details

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- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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- Definition

Disclosure of statutory restrictions on the payment of dividends as prescribed by the National Association of Insurance Commissioners or state regulatory authorities, amounts not available for future dividend payments, and amount of dividends paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 505

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529

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Subsidiary Dividend Restrictions - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 20, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Payment of dividend	$ 59,334,000us-gaap_PaymentsOfDividends	$ 53,546,000us-gaap_PaymentsOfDividends	$ 49,534,000us-gaap_PaymentsOfDividends
WNFIC [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend rate as a percentage of net income	100.00%
Payment of ordinary dividend	May 21, 2015
Payment of extra ordinary dividend				7,000,000
Ordinary dividends payment description	The maximum amount of ordinary dividends that WNFIC can pay to shareholders in a rolling twelve month period is limited to the greater of 10% of statutory adjusted capital and surplus as shown on WNFIC's last annual statement on file with the superintendent or 100% of adjusted net income.
WNFIC [Member] \| Maximum [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend rate as a percentage of net income	10.00%
Payment of dividend	$ 2,300,000