Consolidated Statements of Income (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	$ 219,433		$ 218,420		$ 157,292
Taxable securities	18,276		21,870		18,276
Tax-exempt securities	9,941		10,142		9,348
Federal funds sold and deposits in banks	854		839		963
Total interest income	248,504		251,271		185,879
Interest Expense
Deposits	5,887		10,478		16,733
Federal Home Loan Bank and Federal Reserve Bank borrowings	2,608		2,980		2,841
Prepayment charge on Federal Home Loan Bank advances	603		0		0
Long-term obligations	0		579		1,029
Other borrowings	479		498		489
Total interest expense	9,577		14,535		21,092
Net Interest Income	238,927		236,736		164,787
Provision (recapture) for loan and lease losses	39,367		5,752		47,346
Net interest income after provision (recapture) for loan and lease losses	199,560		230,984		117,441
Noninterest Income (Loss)
Service charges and other fees	29,998		26,632		24,698
Gain on bank acquisitions, net of tax	0		1,830		9,818
Merchant services fees	8,154		7,385		7,502
Gain on sale of investment securities, net	3,733		(2,816)		58
Bank owned life insurance	2,861		2,188		2,041
Change in FDIC loss sharing asset	(24,467)		(49,496)		4,908
Other	6,779		4,994		3,756
Total noninterest income (loss)	27,058		(9,283)		52,781
Noninterest Expense
Compensation and employee benefits	85,434		81,552		69,780
Occupancy	20,031		18,963		16,814
Merchant processing	3,612		3,698		4,364
Advertising and promotion	3,650		3,686		3,081
Data processing	9,714		8,484		8,769
Legal and professional fees	8,915		6,486		5,684
Taxes, licenses and fees	4,736		4,446		2,858
Regulatory premiums	3,384		4,337		6,485
Net cost (benefit) of operation of other real estate owned	(1,969)		(1,022)		787
Amortization of intangibles	4,445		4,319		3,922
FDIC clawback liability	(54)		3,656		0
Other	21,015		17,154		14,603
Total noninterest expense	162,913		155,759		137,147
Income (loss) before income taxes	63,705		65,942		33,075
Provision (benefit) for income taxes	17,562		17,905		2,291
Net Income (Loss)	46,143		48,037		30,784
Net Income (Loss) Applicable to Common Shareholders	46,143		48,037		25,837
Per Common Share
Earnings (loss) basic (dollars per share)	$ 1.16	[1]	$ 1.22	[1]	$ 0.73
Earnings (loss) diluted (dollars per share)	$ 1.16	[1]	$ 1.21	[1]	$ 0.72
Dividends paid per common share ($ per share)	$ 0.98		$ 0.27		$ 0.04
Weighted average number of common shares outstanding	39,260		39,103		35,209
Weighted average number of diluted common shares outstanding	39,263		39,180		35,392
Noncovered Loans [Member]
Interest Expense
Provision (recapture) for loan and lease losses	13,475		7,400		41,291
Covered Loans [Member]
Interest Expense
Provision (recapture) for loan and lease losses	$ 25,892		$ (1,648)		$ 6,055

[1] Due to averaging of shares, quarterly earnings per share may not add up to the totals reported for the full year.