LOANS AND LEASES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Composition of loan portfolio
Non-covered loans and leases	$ 3,864,917	$ 3,049,505
Covered loans	448,418	543,327
Total gross loans and leases	4,313,335	3,592,832
Unearned income	(983)	(2,535)
Total loans and leases, net of unearned income	4,312,352	3,590,297
Allowance for loan and lease losses:
Non-covered loans and leases	(60,241)	(65,899)
Covered loans	(21,793)	(26,069)
Total allowance for loans and lease losses	(82,034)	(91,968)	(116,588)
Total loans and leases, net	4,230,318	3,498,329
Non-PCI Loans
Composition of loan portfolio
Non-covered loans and leases	3,844,591	3,049,505
Covered loans	85,948	25,442
Total gross loans and leases	3,930,539	3,074,947
Unearned income	(983)	(2,535)
Total loans and leases, net of unearned income	3,929,556	3,072,412
Allowance for loan and lease losses:
Non-covered loans and leases	(60,241)	(65,899)
Total allowance for loans and lease losses	(60,241)	(65,899)	(85,313)
Total loans and leases, net	3,869,315	3,006,513
PCI Loans
Composition of loan portfolio
Non-covered loans and leases	20,326
Covered loans	362,470	517,885
Total gross loans and leases	382,796	517,885
Total loans and leases, net of unearned income	382,796	517,885
Allowance for loan and lease losses:
Covered loans		(26,069)
Total allowance for loans and lease losses	(21,793)	(26,069)	(31,275)
Total loans and leases, net	$ 361,003	$ 491,816