REPURCHASE ARRANGEMENTS AND SIMILAR BORROWINGS - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Repurchase Arrangements And Similar Borrowings, Including Interest Rate Hedging Activity [Line Items]
Cash received in lieu of return of pledged collateral			$ 8,300,000
Loss on sale of securities			62,000
Repurchase Arrangements And Similar Borrowings [Member]
Repurchase Arrangements And Similar Borrowings, Including Interest Rate Hedging Activity [Line Items]
Interest paid on Repurchase arrangements and similar borrowings	$ 71,100,000	$ 69,500,000	$ 55,200,000
Minimum [Member]
Repurchase Arrangements And Similar Borrowings, Including Interest Rate Hedging Activity [Line Items]
Maturity period of repurchase arrangements	P30D
Maximum [Member]
Repurchase Arrangements And Similar Borrowings, Including Interest Rate Hedging Activity [Line Items]
Maturity period of repurchase arrangements	P90D