Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Cash and cash equivalents:
Cash and due from banks	$ 184,611	$ 186,196
Interest-bearing deposits with banks	32,632	15,664
Federal funds sold and securities purchased under agreements to resell	262,218	179,004
Total cash and cash equivalents	479,461	380,864
Investment securities:
Securities held to maturity (fair value of $12,891 and $16,553, respectively)	12,426	15,440
Securities available for sale, at fair value	786,791	534,883
Other investments	13,386	9,768
Total investment securities	812,603	560,091
Loans held for sale	30,586	65,279
Loans:
Loans, net	5,645,016	3,569,235
Goodwill	319,429	103,292
Premises and equipment, net	188,114	115,583
Bank owned life insurance	97,197	42,737
FDIC receivable for loss share agreements	93,947	146,171
Deferred tax assets	76,690	33,901
Other real estate owned (covered of $27,520, and $34,257, respectively; non-covered of $37,398, and $32,248, respectively)	64,918	66,505
Core deposit and other intangibles	59,908	25,199
Mortgage servicing rights	20,729
Other assets	42,900	27,589
Total assets	7,931,498	5,136,446
Deposits:
Noninterest-bearing	1,487,798	982,046
Interest-bearing	5,067,699	3,316,397
Total deposits	6,555,497	4,298,443
Federal funds purchased and securities sold under agreements to repurchase	211,401	238,621
Other borrowings	102,060	54,897
Other liabilities	81,071	36,936
Total liabilities	6,950,029	4,628,897
Shareholders' equity:
Preferred stock - $.01 par value; authorized 10,000,000 shares; 65,000, and 0 shares issued and outstanding, respectively	1
Common stock - $2.50 par value; authorized 40,000,000 shares; 24,104,124, and 16,937,464 shares issued and outstanding, respectively	60,260	42,344
Surplus	762,354	328,843
Retained earnings	168,577	135,986
Accumulated other comprehensive income (loss)	(9,723)	376
Total shareholders' equity	981,469	507,549
Total liabilities and shareholders' equity	7,931,498	5,136,446
Non-acquired loans
Loans:
Loans, gross	2,865,216	2,571,003
Loans, allowance	(34,331)	(44,378)
Non-credit impaired | Acquired loans
Loans:
Loans, net	1,598,051	73,215
Credit impaired | Acquired loans
Loans:
Loans, net	$ 1,216,080	$ 969,395