COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Financing Receivable Allowance for Credit Losses Roll Forward
Provision for (reversal of) loan losses	$ (8,000)		$ (9,000)		$ (14,933)		$ (13,327)
Covered loans
Allowance for loan losses disclosures
Principal balance	1,807,970	[1]			1,807,970	[1]			2,195,643	[2]
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	6,518		10,110		7,745		5,153
Provision for (reversal of) loan losses	(944)		723		(1,965)		5,812
Charge-offs	(694)		(1,204)		(900)		(1,336)
Ending balance	4,880		9,629		4,880		9,629
Ending balance allocated to:
Collectively evaluated for impairment	3,692	[3]	7,100	[4]	3,692	[3]	7,100	[4]
Acquired with deteriorated credit quality	1,188		2,529		1,188		2,529
Ending balance	4,880		9,629		4,880		9,629
Covered loans | Commercial and Industrial ("C&I")
Financing Receivable Allowance for Credit Losses Roll Forward
Ending balance	2,600		4,100		2,600		4,100
Ending balance allocated to:
Ending balance	2,600		4,100		2,600		4,100
Covered loans | Commercial Real Estate ("CRE")
Allowance for loan losses disclosures
Principal balance	968,356				968,356				1,267,363
Financing Receivable Allowance for Credit Losses Roll Forward
Ending balance	666		2,400		666		2,400
Ending balance allocated to:
Ending balance	666		2,400		666		2,400
Covered loans | Consumer
Financing Receivable Allowance for Credit Losses Roll Forward
Ending balance	282		407		282		407
Ending balance allocated to:
Ending balance	282		407		282		407
Covered loans | Residential
Allowance for loan losses disclosures
Principal balance	620,910				620,910				693,603
Financing Receivable Allowance for Credit Losses Roll Forward
Ending balance	167		174		167		174
Ending balance allocated to:
Ending balance	167		174		167		174
Covered loans | Covered Advances
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	4,316		8,118		5,476		5,153
Provision for (reversal of) loan losses	70		186		(884)		3,283
Charge-offs	(694)		(1,204)		(900)		(1,336)
Ending balance	3,692	[3]	7,100	[4]	3,692	[3]	7,100	[4]
Ending balance allocated to:
Collectively evaluated for impairment	3,692	[3]	7,100	[4]	3,692	[3]	7,100	[4]
Ending balance	3,692	[3]	7,100	[4]	3,692	[3]	7,100	[4]
Covered loans | PCI Covered Loans
Allowance for loan losses disclosures
Principal balance	66,300				66,300				129,700
Financing Receivable Allowance for Credit Losses Roll Forward
Beginning balance	2,202		1,992		2,269
Provision for (reversal of) loan losses	(1,014)		537		(1,081)		2,529
Ending balance	1,188		2,529		1,188		2,529
Ending balance allocated to:
Acquired with deteriorated credit quality	1,188		2,529		1,188		2,529
Ending balance	$ 1,188		$ 2,529		$ 1,188		$ 2,529

[1] Includes $252.2 million of covered advances comprising of $202.5 million, $29.0 million, $11.7 million and $9.0 million of commercial and industrial, consumer, residential and commercial real estate loans, respectively.

[2] Includes $320.2 million of covered advances comprising of $230.6 million, $46.7 million, $30.9 million and $12.0 million of commercial and industrial, commercial real estate, consumer and residential loans, respectively.

[3] $2.6 million, $666 thousand, $282 thousand and $167 thousand of allowance for loan losses are allocated on commercial and industrial, commercial real estate, consumer and residential loans, respectively.

[4] $4.1 million, $2.4 million, $407 thousand and $174 thousand of allowance for loan losses are allocated on commercial and industrial, commercial real estate, consumer and residential loans, respectively.