CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
INTEREST INCOME:
Loans	$ 260,143	$ 265,136	$ 258,499
Investment securities	34,785	24,564	10,969
Deposits in financial institutions	356	584	406
Total interest income	295,284	290,284	269,874
INTEREST EXPENSE:
Deposits	20,649	26,237	31,916
Borrowings	7,071	9,126	15,497
Subordinated debentures	4,923	5,594	6,415
Total interest expense	32,643	40,957	53,828
Net interest income	262,641	249,327	216,046
PROVISION FOR CREDIT LOSSES:
Non-covered loans	13,300	178,992	141,900
Covered loans	13,270	33,500	18,000
Total provision for credit losses	26,570	212,492	159,900
Net interest income after provision for credit losses	236,071	36,835	56,146
NONINTEREST INCOME:
Service charges on deposit accounts	13,829	11,561	12,008
Other commissions and fees	7,616	7,291	6,951
Other-than-temporary-impairment loss on covered securities		(874)
Increase in cash surrender value of life insurance	1,443	1,440	1,579
FDIC loss sharing income, net	7,776	22,784	16,314
Gain from Affinity acquisition			66,989
Other income	762	1,036	2,066
Total noninterest income	31,426	43,238	105,907
NONINTEREST EXPENSE:
Compensation	86,800	87,483	78,173
Occupancy	28,685	27,639	26,383
Data processing	8,964	8,538	6,946
Other professional services	8,986	7,835	6,314
Business development	2,321	2,463	2,541
Communications	3,011	3,329	2,932
Insurance and assessments	7,171	9,685	9,305
Non-covered other real estate owned, net	7,010	12,310	21,569
Covered other real estate owned, net	3,666	2,460	1,753
Intangible asset amortization	8,428	9,642	9,547
Acquisition costs	600	732	600
Other expense	14,351	16,687	13,141
Total noninterest expense	179,993	188,803	179,204
Earnings (loss) before income taxes	87,504	(108,730)	(17,151)
Income tax (expense) benefit	(36,800)	46,714	7,801
NET EARNINGS (LOSS)	$ 50,704	$ (62,016)	$ (9,350)
Earnings (loss) per share:
Basic (in dollars per share)	$ 1.37	$ (1.77)	$ (0.30)
Diluted (in dollars per share)	$ 1.37	$ (1.77)	$ (0.30)