HEDGES AND OTHER DERIVATIVE FINANCIAL INSTRUMENTS - Additional Information (Details) (USD $)	12 Months Ended								12 Months Ended				1 Months Ended			1 Months Ended
	Dec. 31, 2013 Foreign Currency Contracts	Dec. 31, 2012 Foreign Currency Contracts	Dec. 31, 2013 Credit Default Swap	Dec. 31, 2012 Credit Default Swap	Dec. 31, 2012 Credit Default Swap, Selling Protection	Dec. 31, 2013 Credit Default Swap, Buying Protection	Dec. 31, 2012 Credit Default Swap, Buying Protection	Jan. 31, 2013 Swaps (net) Cash Flow Hedging	Dec. 31, 2013 Foreign Currency Contracts - Long	Dec. 31, 2012 Foreign Currency Contracts - Long	Dec. 31, 2013 Foreign Currency Contracts - Short	Dec. 31, 2012 Foreign Currency Contracts - Short	Jan. 31, 2013 Designated as Hedging Instrument Swaps (net) Cash Flow Hedging	Dec. 31, 2013 Designated as Hedging Instrument Swaps (net) Cash Flow Hedging agreement	Dec. 31, 2012 Designated as Hedging Instrument Swaps (net) Cash Flow Hedging agreement	Aug. 31, 2013 Not Designated as Hedging Instrument Fair Value Hedging Total-return swap	Dec. 31, 2013 Not Designated as Hedging Instrument Fair Value Hedging Total-return swap	Dec. 31, 2013 Maximum Not Designated as Hedging Instrument Fair Value Hedging Total-return swap
Derivative [Line Items]
Notional amount of cash flow hedge instruments								$ 175,000,000					$ 168,800,000	$ 378,800,000	$ 240,000,000
Annual interest rate (as a percent)													2.60%
Remaining maturity (in years)													4 years
Number of interest-rate swap agreements														2	1
Remaining maturity (in years)																2 years
Collateral, Right to reclaim cash																	50,000,000
Notional																	189,089,000	200,000,000
Average notional amount									4,500,000,000	3,800,000,000	243,600,000	205,200,000
Gross unrealized appreciation	51,800,000	53,300,000		7,692,000
Gross unrealized depreciation	135,200,000	147,200,000	4,335,000
Net payments received or paid upfront			3,506,000	4,350,000
Maximum payout amounts by contract term					$ 269,800,000	$ 50,000,000	$ 10,000,000
Maximum term of credit risk derivatives (in years)			5 years	5 years