Credit Facilities and Long-Term Debt - Debt Covenants - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Mar. 31, 2011
Sun Life Assurance Company of Canada [Member]
Summary of outstanding long-term debt balances
Interest coverage ratio	at least 2.0 to 1.0
Debt to capitalization rate	60.00%
Number of debt service reserve accounts	2
Interest payment period	1 year
Debt service reserve account	$ 900,000	$ 1,100,000
Maximum percentage of dividend distribution redemptions of net income	70.00%
Maximum capitalized leases and purchase money obligations			500,000
Maximum limit for sale or transfer of assets	1.00%
Percentage of maximum limit of making acquisition	10.00%
Bank of America [Member]
Summary of outstanding long-term debt balances
Minimum Debt To Capital Ratio	0.55
Maximum debt to capital ratio	1.00
Interest coverage ratio	no less than 2.0-to-1.0
Maximum capital lease borrowing obligation	500,000
Maximum other borrowing obligation	$ 1,000,000
Period consider for distribution and redemption restriction	60 months
Percent of net income consider for distribution and redemption restriction	80.00%
Maximum percent of assets disposal restriction in fiscal year	5.00%
Allstate/CUNA [Member]
Summary of outstanding long-term debt balances
Total dividends and distributions made in the immediately preceding period	60 months
Aggregate consolidated net income	100.00%
Allstate/CUNA [Member] | Maximum [Member]
Summary of outstanding long-term debt balances
Debt to capitalization rate	65.00%
Debt Instrument Interest Coverage Ratio	150.00%