MORTGAGE LOANS (Details) (USD $)			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Minimum	Mar. 31, 2014 Maximum
MORTGAGE LOANS
Mortgage loans holdings	$ 5,390,844,000	$ 5,486,417,000
Mortgage loans
Period for exercise of call options or interest rate reset options			3 years	10 years
Loan-to-value ratio with participating interest (as a percent)				85.00%
Amount that would become due in 2014, if loans are called at their next call dates	54,900,000
Amount that would become due in 2015 through 2019, if loans are called at their next call dates	1,200,000,000
Amount that would become due in 2020 through 2024, if loans are called at their next call dates	506,400,000
Amount that would become due after 2024, if loans are called at their next call dates	$ 133,300,000