DERIVATIVE INSTRUMENTS AND OFFSETTING ASSETS AND LIABILITIES (Offsetting Of Derivative Assets And Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Derivative [Line Items]
Gross Amount Recognized	$ 13,026	$ 15,876	$ 23,721
Gross Amount Offset
Net Amount Recognized	13,026	15,876	23,721
Financial Instruments
Financial Collateral Pledged
Net Amount	13,026	15,876	23,721
Gross Amount Recognized	384,340	463,625	450,178
Gross Amount Offset
Net Amount Recognized	384,340	463,625	450,178
Financial Instruments	(375,832)	(454,002)	(431,089)
Financial Collateral Pledged	(7,384)	(9,175)	(17,285)
Net Amount	1,124	448	1,804
Forward Commitments [Member]
Derivative [Line Items]
Gross Amount Recognized	5,642	6,701	6,436
Gross Amount Offset
Net Amount Recognized	5,642	6,701	6,436
Financial Instruments
Financial Collateral Pledged
Net Amount	5,642	6,701	6,436
Gross Amount Recognized	1,124	448	1,804
Gross Amount Offset
Net Amount Recognized	1,124	448	1,804
Financial Instruments
Financial Collateral Pledged
Net Amount	1,124	448	1,804
Loan/Lease Interest Rate Swaps [Member]
Derivative [Line Items]
Gross Amount Recognized	7,384	9,175	17,285
Gross Amount Offset
Net Amount Recognized	7,384	9,175	17,285
Financial Instruments
Financial Collateral Pledged
Net Amount	7,384	9,175	17,285
Gross Amount Recognized	7,384	9,175	17,285
Gross Amount Offset
Net Amount Recognized	7,384	9,175	17,285
Financial Instruments
Financial Collateral Pledged	(7,384)	(9,175)	(17,285)
Repurchase Arrangements [Member]
Derivative [Line Items]
Gross Amount Recognized	375,832	454,002	431,089
Gross Amount Offset
Net Amount Recognized	375,832	454,002	431,089
Financial Instruments	$ (375,832)	(454,002)	$ (431,089)
Financial Collateral Pledged