CONSOLIDATED STATEMENTS OF EARNINGS (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
INTEREST INCOME:
Loans and leases	$ 260,230	$ 260,143	$ 265,136
Investment securities	35,657	34,785	24,564
Deposits in financial institutions	228	356	584
Total interest income	296,115	295,284	290,284
INTEREST EXPENSE:
Deposits	13,271	20,649	26,237
Borrowings	2,656	7,071	9,126
Subordinated debentures	3,721	4,923	5,594
Total interest expense	19,648	32,643	40,957
Net interest income	276,467	262,641	249,327
PROVISION (NEGATIVE PROVISION) FOR CREDIT LOSSES:
Non-covered loans and leases	(12,000)	13,300	178,992
Covered loans	(819)	13,270	33,500
Total provision (negative provision) for credit losses	(12,819)	26,570	212,492
Net interest income after provision for credit losses	289,286	236,071	36,835
NONINTEREST INCOME:
Service charges on deposit accounts	12,852	13,829	11,561
Other commissions and fees	8,126	7,616	7,291
Gain on sale of leases	2,767
Gain on sale of securities	1,239
Other-than-temporary-impairment losses on covered securities	(1,115)		(874)
Increase in cash surrender value of life insurance	1,264	1,443	1,440
FDIC loss sharing income (expense), net	(10,070)	7,776	22,784
Other income	809	762	1,036
Total noninterest income	15,872	31,426	43,238
NONINTEREST EXPENSE:
Compensation	94,967	86,800	87,483
Occupancy	28,113	28,685	27,639
Data processing	9,120	8,964	8,538
Other professional services	8,367	8,986	7,835
Business development	2,538	2,321	2,463
Communications	2,523	3,011	3,329
Insurance and assessments	5,284	7,171	9,685
Non-covered other real estate owned, net	4,150	7,010	12,310
Covered other real estate owned, net	6,781	3,666	2,460
Intangible asset amortization	6,326	8,428	9,642
Acquisition and integration	4,089	600	732
Debt termination	22,598		2,660
Other expense	16,806	14,351	14,027
Total noninterest expense	211,662	179,993	188,803
Earnings (loss) before income taxes	93,496	87,504	(108,730)
Income tax (expense) benefit	(36,695)	(36,800)	46,714
NET EARNINGS (LOSS)	$ 56,801	$ 50,704	$ (62,016)
Earnings (loss) per share:
Basic (in dollars per share)	$ 1.54	$ 1.37	$ (1.77)
Diluted (in dollars per share)	$ 1.54	$ 1.37	$ (1.77)
Dividends declared per share (in dollars per share)	$ 0.79	$ 0.21	$ 0.04