CONSOLIDATED STATEMENTS OF OPERATIONS (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, including fees	$ 370,922	$ 326,714	$ 280,985
Investment securities	38,603	30,382	32,780
Dividends	4,606	4,021	4,022
Other	2,248	1,538	508
Total interest income	416,379	362,655	318,295
Interest expense:
Deposits	20,012	16,335	16,794
Other borrowings	9,639	11,506	9,116
Junior subordinated debt	1,754	1,823	1,928
Customer repurchase agreements	81	96	194
Total interest expense	31,486	29,760	28,032
Net interest income	384,893	332,895	290,263
Provision for credit losses	4,726	13,220	46,844
Net interest income after provision for credit losses	380,167	319,675	243,419
Non-interest income:
Service charges and fees	10,451	9,920	9,452
Income from bank owned life insurance	4,508	4,809	4,439
Gain (loss) on sales of investment securities, net	757	(1,195)	3,949
Unrealized gains (losses) on assets and liabilities measured at fair value, net	1,212	(6,483)	653
Loss on extinguishment of debt	(502)	(1,387)	0
Bargain purchase gain from acquisition	0	10,044	17,562
Other fee revenue	3,763	3,963	3,564
Other income	5,252	2,576	6,886
Total non-interest income	25,441	22,247	46,505
Non-interest expense:
Salaries and employee benefits	126,630	113,434	105,044
Occupancy	18,192	19,126	18,815
Legal, professional, and directors' fees	14,278	13,633	10,237
Data processing	10,232	8,744	6,134
Insurance	8,862	8,094	8,511
Marketing	4,721	4,246	6,675
Marketing Expense	2,300	2,581	2,306
Customer Service	2,031	2,105	2,219
Intangible amortization	(5,421)	(2,387)	4,207
Goodwill and intangible impairment	1,461	2,388	3,256
Goodwill and intangible impairment	0	0	3,435
Merger / restructure expenses	198	5,752	2,819
Other expense	24,625	18,550	15,202
Total non-interest expense	208,109	196,266	188,860
Income from continuing operations before provision for income taxes	197,499	145,656	101,064
Income tax expense	48,390	29,830	25,935
Income from continuing operations	149,109	115,826	75,129
Loss from discontinued operations, net of tax	(1,158)	(861)	(2,490)
Net income	147,951	114,965	72,639
Dividends on preferred stock	1,387	1,410	3,793
Net income available to common stockholders	$ 146,564	$ 113,555	$ 68,846
Earnings per share from continuing operations:
Basic	$ 1.70	$ 1.34	$ 0.87
Diluted	$ 1.69	$ 1.32	$ 0.86
Loss per share from discontinued operations:
Basic	$ (0.01)	$ (0.01)	$ (0.03)
Diluted	$ (0.02)	$ (0.01)	$ (0.03)
Earnings per share available to common stockholders:
Basic	$ 1.69	$ 1.33	$ 0.84
Diluted	$ 1.67	$ 1.31	$ 0.83
Weighted average number of common shares outstanding:
Basic	86,693	85,682	82,285
Diluted	87,506	86,541	82,912
Dividends declared per common share	$ 0.00	$ 0.00	$ 0.00