CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest income:
Loans and leases	$ 66,711	$ 63,312	$ 63,347	$ 194,775	$ 198,459
Investment securities	8,346	9,558	9,077	27,484	25,678
Deposits in financial institutions	66	20	94	154	234
Total interest income	75,123	72,890	72,518	222,413	224,371
Interest expense:
Deposits	3,292	3,336	5,072	10,232	16,546
Borrowings	210	293	1,782	2,428	5,289
Subordinated debentures	850	848	1,223	2,889	3,668
Total interest expense	4,352	4,477	8,077	15,549	25,503
Net interest income	70,771	68,413	64,441	206,864	198,868
Provision for credit losses:
Non-covered loans and leases	(2,000)			(12,000)	13,300
Covered loans	(141)	(271)	348	3,514	9,148
Total provision for credit losses	(2,141)	(271)	348	(8,486)	22,448
Net interest income after provision for credit losses	72,912	68,684	64,093	215,350	176,420
Noninterest income:
Service charges on deposit accounts	3,108	3,328	3,545	9,789	10,503
Other commissions and fees	2,123	2,095	2,052	6,101	5,752
Gain on sale of leases	132	403		1,525
Other-than-temporary impairment loss on covered security		(1,115)		(1,115)
Increase in cash surrender value of life insurance	304	295	359	964	1,106
FDIC loss sharing (expense) income, net	(367)	(102)	963	(4,048)	5,109
Other income (expense)	382	(33)	224	599	702
Total noninterest income	5,682	4,871	7,143	13,815	23,172
Noninterest expense:
Compensation	23,812	23,699	21,557	71,698	65,203
Occupancy	6,964	7,088	7,423	21,340	21,548
Data processing	2,310	2,258	2,228	6,848	6,832
Other professional services	2,019	2,378	2,239	6,167	7,040
Business development	635	581	548	1,854	1,712
Communications	652	626	678	1,886	2,371
Insurance and assessments	1,398	1,323	1,641	4,014	5,581
Non-covered other real estate owned, net	1,883	130	2,293	3,834	5,296
Covered other real estate owned, net	4,290	2,130	4,813	7,242	3,440
Intangible asset amortization	1,678	1,737	1,977	5,150	6,592
Acquisition and integration	2,101	871		2,997
Debt termination				22,598
Other expense	3,915	4,764	3,190	12,509	10,909
Total noninterest expense	51,657	47,585	48,587	168,137	136,524
Earnings before income taxes	26,937	25,970	22,649	61,028	63,068
Income tax expense	(10,849)	(10,413)	(9,345)	(24,119)	(26,247)
Net earnings	$ 16,088	$ 15,557	$ 13,304	$ 36,909	$ 36,821
Earnings per share:
Basic (in dollars per share)	$ 0.43	$ 0.42	$ 0.36	$ 1.00	$ 0.99
Diluted (in dollars per share)	$ 0.43	$ 0.42	$ 0.36	$ 1.00	$ 0.99
Dividends declared per share (in dollars per share)	$ 0.18	$ 0.18	$ 0.01	$ 0.54	$ 0.03