CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Interest Expense Abstract
Provision for loan losses	$ 40,035	$ 73,072
Other service fees	53,626	52,818
Adjustments (expense) to indemnity reserves on loans sold	(4,526)	(10,347)
Noninterest Expense Abstract
Amortization of intangibles	2,104	2,504
Restructuring Charges			26,700
Net (Loss) Income	74,826	86,409
Net Income (Loss) Applicable to Common Stock	73,896	85,478
Net (Loss) Income per Common Share - Basic	$ 0.72	$ 0.83
Net (Loss) Income per Common Share - Diluted	$ 0.72	$ 0.83
Segment, Continuing Operations [Member]
Interest income:
Loans	355,631	377,602
Money market investments	1,446	973
Investment securities	30,301	35,127
Trading account securities	2,696	5,257
Total interest income	390,074	418,959
Interest Expense Abstract
Deposits	25,864	26,858
Short-term borrowings	1,734	9,040
Long-term debt	19,281	31,890
Total interest expense	46,879	67,788
Net interest income	343,195	351,171
Net interest income after provision for loan losses	303,160	271,335
Service charges on deposit accounts	39,017	39,359
Other service fees	53,626	52,818
Mortgage banking activities	12,852	3,678
Trading Gains (Losses)	414	1,977
Gain Loss On Sales Of Loans Net	(79)	4,393
Adjustments (expense) to indemnity reserves on loans sold	(4,526)	(10,347)
FDIC loss share (expense) income	4,139	(24,206)
Other operating income	9,792	28,360
Total non-interest income	115,235	96,032
Noninterest Expense Abstract
Personnel costs	116,458	104,301
Net occupancy expenses	21,709	21,360
Equipment Expense	13,411	11,412
Other taxes	8,574	13,663
Professional fees	75,528	66,999
Communication	6,176	6,685
Business promotion	10,813	11,386
FDIC deposit insurance	6,398	10,978
Other real estate owned (O R E O) expenses	23,069	6,440
Other operating expenses	17,349	22,349
Amortization of intangibles	2,104	2,026
Restructuring Charges	10,753	0
Total operating expenses	312,342	277,599
Income (loss) from continuing operations before income tax	106,053	89,768
Income Tax Expense Benefit	32,568	23,264
Income (loss) from continuing operations	73,485	66,504
Net (loss) income from continuing operations - Basic	$ 0.71	$ 0.64
Net (loss) income from continuing operations - Diluted	$ 0.71	$ 0.64
Segment, Continuing Operations [Member] | Non Covered Under Loss Sharing Agreements With F D I C [Member]
Interest Expense Abstract
Provision for loan losses	29,711	54,122
Segment, Continuing Operations [Member] | Covered Under Loss Sharing Agreements With F D I C [Member]
Interest Expense Abstract
Provision for loan losses	10,324	25,714
Segment, Discontinued Operations [Member]
Interest Expense Abstract
Net interest income	0	21,797
Provision for loan losses	0	(6,764)
Other operating income	0	10,533
Total non-interest income	0	10,533
Noninterest Expense Abstract
Personnel costs	0	8,852
Net occupancy expenses	0	4,331
Professional fees	(1,341)	2,793
Other operating expenses	0	3,213
Total operating expenses	(1,341)	19,189
Income Loss From Discontinued Operations Net Of Tax	$ 1,341	$ 19,905
Net (loss) income from discontinued operations - Basic	$ 0.01	$ 0.19
Net loss (income) from discontinued operations - Diluted	$ 0.01	$ 0.19