LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Fixed-rate and Adjustable-Rate Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fixed-rate (term to maturity):
Maturing in one year or less	$ 122,313	$ 183,004
Maturing after one year through three years	143,322	171,724
Maturing after three years through five years	187,279	173,251
Maturing after five years through ten years	209,869	167,858
Maturing after ten years	439,004	473,927
Total fixed-rate loans	(1,101,787)	(1,169,764)
Adjustable-Rate (term to rate adjustment):
Maturing or repricing in one year or less	1,390,579	1,260,472
Maturing or repricing after one year through three years	279,791	275,223
Maturing or repricing after three years through five years	541,529	467,895
Maturing or repricing after five years through ten years	99,503	60,316
Maturing or repricing after ten years	5,256	2,044
Total adjustable-rate loans	(2,316,658)	(2,065,950)
Total loans outstanding	$ 3,418,445	$ 3,235,714