CONSOLIDATED STATEMENTS OF EARNINGS (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 and leases	$ 272,726	$ 260,230	$ 260,143
Investment securities	36,923	35,657	34,785
Deposits in financial institutions	265	228	356
Total interest income	309,914	296,115	295,284
INTEREST EXPENSE:
Deposits	7,868	13,271	20,649
Borrowings	537	2,656	7,071
Subordinated debentures	3,796	3,721	4,923
Total interest expense	12,201	19,648	32,643
Net interest income	297,713	276,467	262,641
PROVISION (NEGATIVE PROVISION) FOR CREDIT LOSSES	(4,210)	(12,819)	26,570
Net interest income after provision for credit losses	301,923	289,286	236,071
NONINTEREST INCOME:
Service charges on deposit accounts	11,765	12,852	13,829
Other commissions and fees	8,416	8,126	7,616
Gain on sale of leases	1,791	2,767
Gain on sale of securities	137	1,239
Acquisition-related securities gain	5,222
Other-than-temporary-impairment losses on covered securities		(1,115)
Increase in cash surrender value of life insurance	1,164	1,264	1,443
FDIC loss sharing income (expense), net	(26,172)	(10,070)	7,776
Other income	1,921	809	762
Total noninterest income	4,244	15,872	31,426
NONINTEREST EXPENSE:
Compensation	107,067	94,967	86,800
Accelerated vesting of restricted stock	12,420
Occupancy	29,459	28,113	28,685
Data processing	9,494	9,120	8,964
Other professional services	9,481	8,367	8,986
Business development	3,282	2,538	2,321
Communications	2,923	2,523	3,011
Insurance and assessments	5,596	5,284	7,171
Non-covered other real estate owned, net	330	4,150	7,010
Covered other real estate owned, net	(1,833)	6,781	3,666
Intangible asset amortization	5,402	6,326	8,428
Acquisition and integration	28,392	4,089	600
Debt termination		22,598
Other expense	18,674	16,806	14,351
Total noninterest expense	230,687	211,662	179,993
Earnings from continuing operations before income taxes	75,480	93,496	87,504
Income tax expense	(30,003)	(36,695)	(36,800)
NET EARNINGS FROM CONTINUING OPERATIONS	45,477	56,801	50,704
Earnings from discontinued operations before income taxes	(620)
Income tax expense	258
NET EARNINGS FROM DISCONTINUED OPERATIONS	(362)
NET EARNINGS	$ 45,115	$ 56,801	$ 50,704
Basic earnings per share:
Net earnings from continuing operations (in dollars per share)	$ 1.09	$ 1.54	$ 1.37
Net earnings (in dollars per share)	$ 1.08	$ 1.54	$ 1.37
Diluted earnings per share:
Net earnings from continuing operations (in dollars per share)	$ 1.09	$ 1.54	$ 1.37
Net earnings (in dollars per share)	$ 1.08	$ 1.54	$ 1.37
Dividends declared per share (in dollars per share)	$ 1.00	$ 0.79	$ 0.21