HEDGES AND OTHER DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow Hedges (Details) (Foreign Currency Forward Contracts:, Not Designated as Hedging Instrument)	12 Months Ended			12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended				12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 GBP USD ($)	Dec. 31, 2013 Euro USD ($)	Dec. 31, 2012 Euro USD ($)	Dec. 31, 2013 Euro EUR (€)	Dec. 31, 2012 Euro EUR (€)	Dec. 31, 2013 USD (buy GBP) USD USD ($)	Dec. 31, 2013 USD USD ($)	Dec. 31, 2013 GBP USD ($)	Dec. 31, 2013 GBP GBP (£)	Dec. 31, 2013 Japanese Yen USD ($)	Dec. 31, 2012 Japanese Yen USD ($)	Dec. 31, 2013 Japanese Yen JPY (¥)	Dec. 31, 2012 Japanese Yen JPY (¥)	Dec. 31, 2013 Minimum Euro	Dec. 31, 2012 Minimum Euro	Dec. 31, 2013 Minimum USD (buy GBP) USD	Dec. 31, 2013 Minimum Japanese Yen	Dec. 31, 2012 Minimum Japanese Yen	Dec. 31, 2013 Maximum Euro	Dec. 31, 2012 Maximum Euro	Dec. 31, 2013 Maximum USD (buy GBP) USD	Dec. 31, 2013 Maximum Japanese Yen	Dec. 31, 2012 Maximum Japanese Yen
Derivative [Line Items]
Expiration date										Apr. 30, 2014						Jan. 08, 2014	Jan. 07, 2013	Jan. 08, 2014	Jan. 31, 2014	Feb. 28, 2013	Oct. 31, 2014	Oct. 31, 2013	Sep. 30, 2014	Jan. 30, 2015	May 31, 2013
Contract Amount	$ 276,070,000	$ 120,573,000	$ 4,643,000	$ 153,959,000	$ 104,155,000	€ 115,685,000	€ 93,500,000	$ 54,361,000	$ 54,361,000		£ 3,000,000	$ 63,107,000	$ 16,418,000	¥ 6,261,700,000	¥ 1,330,000,000
Market Value in U.S. Dollars	274,318,000	121,376,000		159,485,000	105,997,000			50,286,000		4,966,000		59,581,000	15,379,000
Net Unrealized Appreciation (Depreciation)	$ 1,752,000	$ (803,000)		$ (5,526,000)	$ (1,842,000)			$ 4,075,000		$ (323,000)		$ 3,526,000	$ 1,039,000