CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and noninterest-bearing due from banks	$ 94,172,230	$ 79,785,004
Interest-bearing due from banks	75,826,385	124,509,486
Federal funds sold and other	938,792	4,644,247
Cash and cash equivalents	170,937,407	208,938,737
Securities available-for-sale, at fair value	735,400,911	693,456,314
Securities held-to-maturity (fair value of $38,194,567 and $38,817,467 at March 31, 2014 and December 31, 2013, respectively)	38,733,099	39,795,649
Mortgage loans held-for-sale	13,970,926	12,850,339
Loans	4,181,686,799	4,144,493,486
Less allowance for loan losses	(67,523,575)	(67,969,693)
Loans, net	4,114,163,224	4,076,523,793
Premises and equipment, net	71,627,370	72,649,574
Other investments	33,358,506	33,226,195
Accrued interest receivable	17,219,090	15,406,389
Goodwill	243,568,203	243,651,006
Core deposits and other intangible assets	3,603,074	3,840,750
Other real estate owned	15,037,823	15,226,136
Other assets	143,312,957	148,210,975
Total assets	5,600,932,590	5,563,775,857
Deposits:
Noninterest-bearing	1,180,202,107	1,167,414,487
Interest-bearing	912,387,013	884,294,802
Savings and money market accounts	1,902,452,916	1,962,714,398
Time	505,534,750	519,049,037
Total deposits	4,500,576,786	4,533,472,724
Securities sold under agreements to repurchase	68,092,650	70,465,326
Federal Home Loan Bank advances	150,604,286	90,637,328
Subordinated debt and other borrowings	98,033,292	98,658,292
Accrued interest payable	745,180	792,703
Other liabilities	40,383,743	46,041,823
Total liabilities	4,858,435,937	4,840,068,196
Stockholders' equity:
Preferred stock, no par value, 10,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, par value $1.00; 90,000,000 shares authorized; 35,567,268 and 35,221,941 shares issued and outstanding at March 31, 2014 and December 31, 2013, respectively	35,567,268	35,221,941
Additional paid-in capital	551,461,564	550,212,135
Retained earnings	155,840,829	142,298,199
Accumulated other comprehensive income, net of taxes	(373,008)	(4,024,614)
Total stockholders' equity	742,496,653	723,707,661
Total liabilities and stockholders' equity	$ 5,600,932,590	$ 5,563,775,857