Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest income:
Interest and fees on loans	$ 140,307	$ 153,899	$ 159,848
Interest and dividends on investment securities:
Taxable	44,864	50,162	54,694
Tax-exempt	2,874	4,444	5,468
Interest on cash equivalents	15	11	20
Total interest income	188,060	208,516	220,030
Interest expense:
Deposits	29,147	44,286	69,164
Other borrowings	4,865	8,648	8,844
Notes payable and other advances	3,838	5,289	6,557
Junior subordinated debentures	5,792	5,804	6,066
Subordinated notes	10,004	8,415	6,488
Total interest expense	53,646	72,442	97,119
Net interest income	134,414	136,074	122,911
Provision for loan losses	49,258	143,127	89,611
Net interest income (loss) after provision for loan losses	85,156	(7,053)	33,300
Noninterest income:
Service charges	11,481	11,282	11,306
Mortgage banking revenue	20,384	14,261
Gain (loss) on disposition of bulk purchased mortgage loans	105	(2,418)	(1,961)
Gain on sales of investment securities	4,944	41,376	17,595
Other derivative income	7,026	1,963	1,399
Other noninterest income	5,302	6,219	5,252
Total noninterest income	49,242	72,683	33,591
Noninterest expense:
Salaries and employee benefits	64,736	54,073	42,914
Occupancy of premises	8,603	8,328	8,146
Furniture and equipment	2,162	2,284	2,230
Nonperforming asset expense	5,264	19,790	11,726
FDIC assessment	6,705	8,238	10,380
Legal fees, net	3,821	4,922	5,961
Early extinguishment of debt	3,444	378	527
Other noninterest expense	21,658	20,223	15,723
Total noninterest expense	116,393	118,236	97,607
Income (loss) before income taxes	18,005	(52,606)	(30,716)
Income tax (benefit) expense	(73,110)	1,217	834
Net income (loss)	91,115	(53,823)	(31,550)
Preferred dividends and discounts	(9,145)	(9,699)	(11,483)
Implied noncash preferred dividend	(10,501)	(15,756)
Net income (loss) applicable to common stockholders	$ 71,469	$ (79,278)	$ (43,033)
Basic income (loss) per common share	$ 3.45	$ (5.27)	$ (4.10)
Diluted earnings (loss) per common share	$ 3.45	$ (5.27)	$ (4.10)