Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Interest Income
Loans	$ 266,284		$ 219,433		$ 218,420
Taxable securities	20,459		18,276		21,870
Tax-exempt securities	9,837		9,941		10,142
Federal funds sold and deposits in banks	355		854		839
Total interest income	296,935		248,504		251,271
Interest Expense
Deposits	3,962		5,887		10,478
Federal Home Loan Bank and Federal Reserve Bank borrowings	(404)		2,608		2,980
Prepayment charge on Federal Home Loan Bank advances	1,548		603		0
Long-term obligations	0		0		579
Other borrowings	734		479		498
Total interest expense	5,840		9,577		14,535
Net Interest Income	291,095		238,927		236,736
Provision (recapture) for loan and lease losses	(101)		39,367		5,752
Net interest income after provision (recapture) for loan and lease losses	291,196		199,560		230,984
Noninterest Income (Loss)
Service charges and other fees	48,351		29,998		26,632
Gain on bank acquisitions, net of tax	0		0		1,830
Merchant services fees	8,812		8,154		7,385
Gain on sale of investment securities, net	462		3,733		(2,816)
Bank owned life insurance	3,570		2,861		2,188
Change in FDIC loss sharing asset	(45,017)		(24,467)		(49,496)
Other	10,522		6,779		4,994
Total noninterest income (loss)	26,700		27,058		(9,283)
Noninterest Expense
Compensation and employee benefits	125,432		85,434		81,552
Occupancy	33,054		20,031		18,963
Merchant processing	3,551		3,612		3,698
Advertising and promotion	4,090		3,650		3,686
Data processing	14,076		9,714		8,484
Legal and professional fees	12,338		8,915		6,486
Taxes, licenses and fees	5,033		4,736		4,446
Regulatory premiums	4,706		3,384		4,337
Net cost (benefit) of operation of other real estate owned	(7,401)		(1,969)		(1,022)
Amortization of intangibles	6,045		4,445		4,319
FDIC clawback liability	278		(54)		3,656
Other	29,684		21,015		17,154
Total noninterest expense	230,886		162,913		155,759
Income (loss) before income taxes	87,010		63,705		65,942
Provision (benefit) for income taxes	26,994		17,562		17,905
Net Income (Loss)	60,016		46,143		48,037
Per Common Share
Earnings (loss) basic (dollars per share)	$ 1.24	[1]	$ 1.16	[1]	$ 1.22
Earnings (loss) diluted (dollars per share)	$ 1.21	[1]	$ 1.16	[1]	$ 1.21
Common Stock, Dividends, Per Share, Cash Paid	$ 0.41		$ 0.98		$ 0.27
Weighted average number of common shares outstanding	47,993		39,260		39,103
Weighted average number of diluted common shares outstanding	49,051		39,263		39,180
Noncovered Loans [Member]
Interest Expense
Provision (recapture) for loan and lease losses	3,160		13,475		7,400
Covered Loans [Member]
Interest Expense
Provision (recapture) for loan and lease losses	$ (3,261)		$ 25,892		$ (1,648)

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