LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Fixed-rate and Adjustable-Rate Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fixed-rate (term to maturity):
Due in one year or less	$ 183,004	$ 216,782
Due after one year through three years	171,724	250,715
Due after three years through five years	173,251	182,647
Due after five years through ten years	167,858	157,559
Due after ten years	473,927	502,196
Total fixed-rate loans	1,169,764	1,309,899
Adjustable-Rate (term to rate adjustment):
Due in one year or less	1,260,472	1,200,182
Due after one year through three years	275,223	425,309
Due after three years through five years	467,895	336,382
Due after five years through ten years	60,316	23,618
Due after ten years	2,044	948
Total adjustable-rate loans	2,065,950	1,986,439
Total loans outstanding	$ 3,235,714	$ 3,296,338