SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (REPOs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (REPOs) [Abstract]
Balance outstanding at end of period	$ 0		$ 0		$ 195,000
Average interest cost at end of period (in hundredths)	0.00%		0.00%		4.33%
Average balance outstanding during period	0		132,910		195,000
Average interest cost during the period (in hundredths)	0.00%	[1]	26.24%	[1]	4.33%
Estimated fair value of underlying collateral	0		0		214,446
Maximum balance outstanding at month end during the year	0		195,000		195,000
Prepayment charge included in interest expense	$ 0		$ 28,772		$ 0
Average interest cost related to prepayment charge (in hundredths)	0.00%		4.33%		4.33%

[1] Excluding a prepayment charge of $28,772 included in interest expense on borrowed funds in the consolidated statements of operations, the average interest cost would have been 4.33% during the year ended December 31, 2012.