LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Details 4) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Disclosures on loans acquired
Carrying value of loans	$ 3,323,977		$ 3,323,977		$ 3,040,495
PCI loan
Disclosures on loans acquired
Contractually-required principal	20,080		20,080		26,571
Non-accretable amount	(2,076)		(2,076)		(6,784)
Accretable amount	(4,323)		(4,323)		(2,297)
Carrying value of loans	13,681		13,681		$ 17,490
Rollforward of the accretable discount on purchased loans within the scope of ASC Topic 310-30
Balance at the beginning of the period	(2,170)	$ (2,765)	(2,297)	$ (3,457)
Transfers between non-accretable and accretable	(3,378)	(1,029)	(3,354)	(2,340)
Net accretion into interest income on loans, including loan fees	(1,225)	(1,307)	(1,328)	(3,310)
Balance at the end of the period	$ (4,323)	$ (2,487)	$ (4,323)	$ (2,487)