Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Interest Income
Loans	$ 268,279		$ 266,284		$ 219,433
Taxable securities	28,754		20,459		18,276
Tax-exempt securities	10,830		9,837		9,941
Interest-earning deposits	179		355		854
Total interest income	308,042		296,935		248,504
Interest Expense
Deposits	3,005		3,962		5,887
Federal Home Loan Bank and Federal Reserve Bank borrowings	396		(404)		2,608
Prepayment charge on Federal Home Loan Bank advances	0		1,548		603
Other borrowings	593		734		479
Total interest expense	3,994		5,840		9,577
Net Interest Income	304,048		291,095		238,927
Provision (recapture) for loan and lease losses	6,727		(101)		39,367
Net interest income after provision (recapture) for loan and lease losses	297,321		291,196		199,560
Noninterest Income (Loss)
Service charges and other fees	55,555		48,351		29,998
Merchant services fees	7,975		8,812		8,154
Gain on sale of investment securities, net	552		462		3,733
Bank owned life insurance	3,823		3,570		2,861
Change in FDIC loss sharing asset	(19,989)		(45,017)		(24,467)
Other	11,834		10,522		6,779
Total noninterest income (loss)	59,750		26,700		27,058
Noninterest Expense
Compensation and employee benefits	130,864		125,432		85,434
Occupancy	32,300		33,054		20,031
Merchant processing	4,006		3,551		3,612
Advertising and promotion	3,964		4,090		3,650
Data processing	15,369		14,076		9,714
Legal and professional fees	11,389		12,338		8,915
Taxes, licenses and fees	4,552		5,033		4,736
Regulatory premiums	4,549		4,706		3,384
Net cost (benefit) of operation of other real estate owned	(1,045)		(7,401)		(1,969)
Amortization of intangibles	6,293		6,045		4,445
Other	27,045	[1]	29,962	[1]	20,961	[1]
Total noninterest expense	239,286		230,886		162,913
Income before income taxes	117,785		87,010		63,705
Income tax expense (benefit)	36,211		26,994		17,562
Net Income (Loss)	$ 81,574		$ 60,016		$ 46,143
Per Common Share
Earnings (loss) basic (dollars per share)	$ 1.53		$ 1.24		$ 1.16
Earnings (loss) diluted (dollars per share)	$ 1.52		$ 1.21		$ 1.16
Common Stock, Dividends, Per Share, Cash Paid	$ 0.94		$ 0.41		$ 0.98
Weighted average number of common shares outstanding	52,618		47,993		39,260
Weighted average number of diluted common shares outstanding	53,183		49,051		39,263

[1] (1) Reclassified to conform to the current period’s presentation. The reclassification was limited to removing the separate line item for FDIC clawback liability expense within noninterest expense and including the prior period activity in the line item for other noninterest expense as well as removing the separate line item for provision for losses on covered loans and including the prior period activity in the line item for provision for loan and lease losses.