CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income:
Loans and leases	$ 75,196	$ 63,168	$ 66,711	$ 199,374	$ 194,775
Investment securities	9,871	8,414	8,346	26,501	27,484
Deposits in financial institutions	91	49	66	183	154
Total interest income	85,158	71,631	75,123	226,058	222,413
Interest expense:
Deposits	1,692	2,077	3,292	6,418	10,232
Borrowings	108	199	210	451	2,428
Subordinated debentures	1,069	882	850	2,734	2,889
Total interest expense	2,869	3,158	4,352	9,603	15,549
Net interest income	82,289	68,473	70,771	216,455	206,864
Negative provision for credit losses	(4,167)	(1,842)	(2,141)	(2,872)	(8,486)
Net interest income after negative provision for credit losses	86,456	70,315	72,912	219,327	215,350
Noninterest income:
Service charges on deposit accounts	2,938	2,767	3,108	8,568	9,789
Other commissions and fees	2,204	2,154	2,123	6,291	6,101
Gain on sale of leases	604	279	132	1,108	1,525
Gain on sale of securities				409
Acquisition-related securities gain	5,222			5,222
Other-than-temporary impairment loss on covered security					(1,115)
Increase in cash surrender value of life insurance	62	221	304	716	964
FDIC loss sharing expense, net	(7,032)	(5,410)	(367)	(15,579)	(4,048)
Other income	1,129	192	382	1,435	599
Total noninterest income	5,127	203	5,682	8,170	13,815
Noninterest expense:
Compensation	27,963	26,057	23,812	79,370	71,698
Occupancy	7,828	7,480	6,964	21,906	21,340
Data processing	2,590	2,455	2,310	7,278	6,848
Other professional services	2,830	2,240	2,019	7,167	6,167
Business development	756	798	635	2,290	1,854
Communications	828	622	652	2,063	1,886
Insurance and assessments	1,496	1,267	1,398	4,024	4,014
Non-covered other real estate owned, net	(88)	80	1,883	305	3,834
Covered other real estate owned, net	(332)	(94)	4,290	(1,239)	7,242
Intangible asset amortization	1,512	1,284	1,678	3,972	5,150
Acquisition and integration	5,450	17,997	2,101	24,139	2,997
Debt termination					22,598
Other expense	5,367	4,030	3,915	13,324	12,509
Total noninterest expense	56,200	64,216	51,657	164,599	168,137
Earnings from continuing operations before income taxes	35,383	6,302	26,937	62,898	61,028
Income tax expense	(11,243)	(1,906)	(10,849)	(20,868)	(24,119)
Net earnings from continuing operations	24,140	4,396	16,088	42,030	36,909
Earnings (loss) from discontinued operations before income taxes	39	(81)		(42)
Income tax (expense) benefit	(16)	34		18
Net earnings (loss) from discontinued operations	23	(47)		(24)
Net earnings	$ 24,163	$ 4,349	$ 16,088	$ 42,006	$ 36,909
Basic earnings per share:
Net earnings from continuing operations (in dollars per share)	$ 0.53	$ 0.11	$ 0.43	$ 1.03	$ 1.00
Net earnings (in dollars per share)	$ 0.53	$ 0.11	$ 0.43	$ 1.03	$ 1.00
Diluted earnings per share:
Net earnings from continuing operations (in dollars per share)	$ 0.53	$ 0.11	$ 0.43	$ 1.03	$ 1.00
Net earnings (in dollars per share)	$ 0.53	$ 0.11	$ 0.43	$ 1.03	$ 1.00
Dividends declared per share (in dollars per share)	$ 0.25	$ 0.25	$ 0.18	$ 0.75	$ 0.54