OTHER ASSETS (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Servicing Fees [Abstract]
Mortgage servicing fee income	$ 10,400,000	$ 11,200,000	$ 21,300,000	$ 22,200,000
Gains (losses) on sale of mortgage loans	10,700,000	8,700,000	13,900,000	42,100,000
FNMA [Member]
Servicing Assets [Line Items]
Repurchase amount of loans	1,500,000,000		1,500,000,000
Residential mortgages [Member]
Servicing Assets [Line Items]
Principal balance of loans serviced for others	14,000,000,000		14,000,000,000		14,500,000,000
Carrying value of MSRs based on the fair value option	124,118,000	138,141,000	124,118,000	138,141,000	141,787,000	92,512,000
Net changes in the fair value of MSRs	(6,893,000)	23,300,000	(11,352,000)	33,366,000
Residential mortgages [Member] | Loans sold with recourse and credit enhancement features [Member]
Servicing Assets [Line Items]
Loans sold with recourse, unpaid principal balance	61,300,000		61,300,000		65,700,000
Multi-family loans [Member] | FNMA [Member]
Servicing Assets [Line Items]
Repurchase amount of loans	816,500,000		816,500,000
Multi-family loans [Member] | FNMA [Member] | Loans sold with recourse and credit enhancement features [Member]
Servicing Assets [Line Items]
Loans sold with recourse, unpaid principal balance	$ 3,000,000,000		$ 3,000,000,000		$ 4,300,000,000