FINANCIAL INSTRUMENTS - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Other government obligations | Temporarily Impaired Securities
Fair Value, Measurement Inputs, Disclosure [Line Items]
Number of temporarily impaired securities	2
Temporarily Impaired Securities | U.S. Treasury and other direct U.S. Government obligations
Fair Value, Measurement Inputs, Disclosure [Line Items]
Number of temporarily impaired securities	3
Temporarily Impaired Securities | Federal agency mortgage-backed securities
Fair Value, Measurement Inputs, Disclosure [Line Items]
Number of temporarily impaired securities	3
Temporarily Impaired Securities | Corporate bonds
Fair Value, Measurement Inputs, Disclosure [Line Items]
Number of temporarily impaired securities	14
Temporarily Impaired Securities | Minimum
Fair Value, Measurement Inputs, Disclosure [Line Items]
Maturities of temporarily impaired securities	12 months
Collateralized Mortgage Backed Securities
Fair Value, Measurement Inputs, Disclosure [Line Items]
Percent of the total fixed maturities	18.80%	15.40%
Credit rating of MBS holdings	Our MBS holdings are issued by the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation, or the Government National Mortgage Association all of which are rated "AAA" by Moody's Investors Services.