LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 4) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
2012 FDIC-Assisted Acquisitions
Total carrying value of loans	$ 2,908,535,000		$ 2,908,535,000		$ 2,589,792,000
Loans | As Previously Reported - Contractual Amount
2012 FDIC-Assisted Acquisitions
Contractually-required principal	2,922,238,000		2,922,238,000		2,614,632,000
Total carrying value of loans	2,908,535,000		2,908,535,000		2,589,792,000
PCI loan
2012 FDIC-Assisted Acquisitions
Contractually-required principal	35,760,000		35,760,000		57,992,000
Non-accretable amount	(8,610,000)		(8,610,000)		(13,582,000)
Accretable amount	(2,418,000)		(2,418,000)		(3,457,000)
Total carrying value of loans	24,732,000		24,732,000		40,953,000
Rollforward of the accretable discount on purchased loans within the scope of ASC Topic 310-30
Balance at the beginning of the period	(2,487,000)	(1,381,000)	(3,457,000)	(3,231,000)
Transfers between non-accretable and accretable	(609,000)	(3,725,000)	(2,949,000)	(5,421,000)
Net accretion into interest income on loans, including loan fees	678,000	1,916,000	3,988,000	5,179,000
Other changes				283,000
Balance at the end of the period	(2,418,000)	(3,190,000)	(2,418,000)	(3,190,000)
PCI loan | Loans
2012 FDIC-Assisted Acquisitions
Financial assets	25,000,000		25,000,000		41,000,000
PCI loan | Loans | As Previously Reported - Contractual Amount
2012 FDIC-Assisted Acquisitions
Financial assets	$ 36,000,000		$ 36,000,000		$ 58,000,000