DERIVATIVES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 item	Jun. 30, 2012	Jun. 30, 2013 item	Jun. 30, 2012	Dec. 31, 2012
Derivatives
Number of derivative financial instruments	21		21
Strike rate cash flow hedge swap agreements, low end of range (as a percent)	2.79%		2.79%
Strike rate cash flow hedge swap agreements, high end of range (as a percent)	6.98%		6.98%
Other liabilities - Cash Flow Hedge Swap Agreements	$ (5,037)		$ (5,037)		$ (15,228)
Other assets - Cash Flow Hedge Swap Agreements	9,687		9,687
Swap agreements increase (decrease) in interest expenses due to interest payments	(2,129)	(1,397)	(4,282)	(2,515)
Swap agreements gain (loss) recognized in OCI			15,222
Swap agreements gain (loss) reclassified from OCI			(4,282)
Credit risk derivative, fair value of derivatives in a net liability position	5,166		5,166
Low end of range
Derivatives
Notional Amounts	4,873		4,873
High end of range
Derivatives
Notional Amounts	$ 97,211		$ 97,211