DERIVATIVES (Income Statement Effect) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Cross currency swaps [Member] | Miscellaneous income [Member] | Fair value hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives			$ 774	$ 1,700
Interest rate swaps [Member] | Miscellaneous income [Member] | Fair value hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	1,731	0	978	0
Interest rate swaps [Member] | Net interest income [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(13,469)	(16,000)	(40,936)	(51,300)
Forward commitments to sell loans [Member] | Mortgage banking income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	2,490	(42,300)	(2,762)	(1,900)
Interest rate lock commitments [Member] | Mortgage banking income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(2,027)	13,000	1,518	(11,900)
Mortgage servicing rghts [Member] | Mortgage banking income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	1,032	8,200	(4,100)	9,000
Customer related derivatives [Member] | Miscellaneous income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	3,280	1,100	6,941	10,700
Foreign exchange [Member] | Miscellaneous income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	1,794	(700)	1,302	(2,500)
SCUSA derivatives [Member] | Miscellaneous income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	9,130	0	27,269	0
SCUSA derivatives [Member] | Net interest income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	(971)	0	(4,951)	0
Other [Member] | Miscellaneous income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	580	0	(729)	0
Other [Member] | Net interest income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	0	0	0	3,100
Other [Member] | Non-interest income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on all derivatives	$ 0	$ (12,000)	$ 0	$ 3,700