CONSOLIDATED STATEMENTS OF INCOME (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
INTEREST INCOME:      
Interest and fees on loans $ 114,514 $ 132,682 $ 139,685
Interest on overnight investments 821 893 890
Interest on trading securities     26
Interest and dividends on investment securities:      
Taxable 31,255 33,876 35,955
Tax-exempt 2,786 2,979 3,587
Total interest income 149,376 170,430 180,143
Interest on deposits:      
Interest bearing checking accounts 2,948 4,712 7,742
Money market and savings deposits 6,653 8,392 9,158
Time deposits 8,242 9,765 12,531
Total 17,843 22,869 29,431
Interest on borrowed funds 7,797 8,104 8,615
Total interest expense 25,640 30,973 38,046
Net interest income 123,736 139,457 142,097
PROVISION FOR LOAN LOSSES 13,000 28,000 37,500
Net interest income after provision for loan losses 110,736 111,457 104,597
NON-INTEREST INCOME:      
Insurance and advisory commission and fee income 7,170 7,389 7,720
Service charges and other income 15,561 14,604 15,867
Mortgage banking income 1,017 2,731 916
Net gain on sale of investment securities 1,377 2,882 652
Trading securities profits     81
Total non-interest income 25,125 27,606 25,236
NON-INTEREST EXPENSE:      
Salaries and employee benefits 57,154 57,529 55,812
Occupancy expense 9,826 9,887 11,040
Depreciation, amortization and maintenance 9,026 8,919 8,683
Marketing expense 5,234 2,811 3,189
Intangible amortization expense 1,872 4,163 3,584
FDIC insurance 3,589 4,221 5,332
Merger and restructuring charges (189) 2,233 5,058
Professional fees 5,058 5,396 4,380
Classified loan & other real estate owned related expense 6,384 8,243 3,944
Other 22,734 19,723 19,688
Total non-interest expense 120,688 123,125 120,710
Income before income taxes 15,173 15,938 9,123
INCOME TAX EXPENSE (BENEFIT) 2,595 1,759 (1,913)
Net income $ 12,578 $ 14,179 $ 11,036
NET EARNINGS PER SHARE - Basic and Diluted (in dollars per share) $ 0.17 $ 0.18 $ 0.14
Average common shares outstanding - Basic (in shares) 75,841,392 76,657,265 77,075,726
Average common shares outstanding - Diluted (in shares) 76,085,398 76,827,872 77,231,303