NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 13) (Non-covered loans, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment	$ 176,712	$ 183,477
Collectively evaluated for impairment	19,119,356	15,494,840
Acquired with deteriorated credit quality	55,488
Ending balance	19,351,556	15,678,317
Residential
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment	55,117	56,287
Collectively evaluated for impairment	4,592,862	4,129,022
Acquired with deteriorated credit quality	1,316
Ending balance	4,649,295	4,185,309
Commercial Real Estate ("CRE")
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment	77,349	84,436
Collectively evaluated for impairment	5,819,505	4,500,641
Acquired with deteriorated credit quality	52,496
Ending balance	5,949,350	4,585,077
Commercial and Industrial ("C&I")
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment	42,985	39,527
Collectively evaluated for impairment	7,238,997	5,320,666
Acquired with deteriorated credit quality	1,676
Ending balance	7,283,658	5,360,193
Consumer
Recorded investment in total loans receivable related to each balance in the allowance for loan losses
Individually evaluated for impairment	1,261	3,227
Collectively evaluated for impairment	1,467,992	1,544,511
Ending balance	$ 1,469,253	$ 1,547,738