CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Cash and noninterest-bearing due from banks	$ 57,906,350	$ 51,946,542
Interest-bearing due from banks	38,860,678	111,535,083
Federal funds sold and other	2,792,238	1,807,044
Cash and cash equivalents	99,559,266	165,288,669
Securities available-for-sale, at fair value	683,545,006	706,577,806
Securities held-to-maturity (fair value of $40,376,745 and $583,212 at March 31, 2013 and December 31, 2012, respectively)	40,458,642	574,863
Mortgage loans held-for-sale	30,326,709	41,194,639
Loans	3,772,363,758	3,712,162,430
Less allowance for loan losses	(69,411,493)	(69,417,437)
Loans, net	3,702,952,265	3,642,744,993
Premises and equipment, net	75,760,671	75,804,895
Other investments	27,311,943	26,962,890
Accrued interest receivable	16,940,917	14,856,615
Goodwill	244,011,793	244,040,421
Core deposits and other intangible assets	4,582,286	5,103,273
Other real estate owned	16,802,183	18,580,097
Other assets	128,683,433	98,819,455
Total assets	5,070,935,114	5,040,548,616
Deposits:
Noninterest-bearing	977,495,990	985,689,460
Interest-bearing	788,631,493	760,786,247
Savings and money market accounts	1,564,517,135	1,662,256,403
Time	572,250,233	606,455,873
Total deposits	3,902,894,851	4,015,187,983
Securities sold under agreements to repurchase	129,099,508	114,667,475
Federal Home Loan Bank advances	200,796,066	75,850,390
Subordinated debt and other borrowings	105,533,292	106,158,292
Accrued interest payable	1,235,441	1,360,598
Other liabilities	39,942,214	48,252,519
Total liabilities	4,379,501,372	4,361,477,257
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; 35,022,487 and 34,696,597 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively	35,022,487	34,696,597
Additional paid-in capital	544,619,717	543,760,439
Retained earnings	100,834,814	87,386,689
Accumulated other comprehensive income, net of taxes	10,956,724	13,227,634
Total stockholders' equity	691,433,742	679,071,359
Total liabilities and stockholders' equity	$ 5,070,935,114	$ 5,040,548,616