SEGMENT INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Segment Reporting Information
Interest income	$ 263,261		$ 286,173
Charge for funds used	(70,094)		(60,496)
Interest spread on funds used	193,167		225,677
Interest expense	(27,544)		(28,207)
Credit on funds provided	70,094		60,496
Interest spread on funds provided	42,550		32,289
Net interest income (loss)	235,717		257,966
Provision for loan losses	4,987		6,933
Depreciation, amortization and accretion	4,127	[1]	9,064	[1],[2]
Goodwill	469,433		458,467		469,433
Segment pre-tax profit	146,826		116,163	[2]
Segment assets	29,906,835		27,400,604	[2]	28,743,592	[2]
Retail Banking
Segment Reporting Information
Interest income	87,446		98,724
Charge for funds used	(23,298)		(16,045)
Interest spread on funds used	64,148		82,679
Interest expense	(12,224)		(11,711)
Credit on funds provided	57,668		48,193
Interest spread on funds provided	45,444		36,482
Net interest income (loss)	109,592		119,161
Provision for loan losses	731		2,652
Depreciation, amortization and accretion	1,682	[1]	2,571	[1],[2]
Goodwill	357,207		354,163
Segment pre-tax profit	52,935		52,170	[2]
Segment assets	7,540,501		7,877,996	[2]
Commercial Banking
Segment Reporting Information
Interest income	158,786		169,076
Charge for funds used	(37,351)		(21,328)
Interest spread on funds used	121,435		147,748
Interest expense	(4,263)		(3,280)
Credit on funds provided	8,016		8,436
Interest spread on funds provided	3,753		5,156
Net interest income (loss)	125,188		152,904
Provision for loan losses	4,256		4,281
Depreciation, amortization and accretion	(10,477)	[1]	(3,328)	[1],[2]
Goodwill	112,226		104,304
Segment pre-tax profit	93,175		86,931	[2]
Segment assets	15,491,368		13,661,149	[2]
Other
Segment Reporting Information
Interest income	17,029		18,373
Charge for funds used	(9,445)		(23,123)
Interest spread on funds used	7,584		(4,750)
Interest expense	(11,057)		(13,216)
Credit on funds provided	4,410		3,867
Interest spread on funds provided	(6,647)		(9,349)
Net interest income (loss)	937		(14,099)
Depreciation, amortization and accretion	12,922	[1]	9,821	[1],[2]
Segment pre-tax profit	716		(22,938)	[2]
Segment assets	$ 6,874,966		$ 5,861,459	[2]

[1] Includes amortization and accretion related to the FDIC indemnification asset.

[2] Prior periods were restated to reflect the retrospective application of adopting the new accounting guidance related to the Company?s investments in qualified affordable housing projects Accounting Standard Update ("ASU") 2014-01. See Note 10 of the Notes to Consolidated Financial Statements for additional information.