Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks, including interest bearing amounts of $17,871 and $8,405, respectively	$ 92,974	$ 94,002
Securities:
Available-for-sale, at fair value	1,654,264	917,424
Held-to-maturity (fair values of $772,843 and $619,617, respectively)	743,925	593,670
Total securities	2,398,189	1,511,094
Loans held for sale	6,064	5,865
Portfolio loans, net of unearned income	4,873,721	4,086,766
Allowance for loan losses	(44,173)	(44,654)
Net portfolio loans	4,829,548	4,042,112
Premises and equipment, net	110,900	93,135
Accrued interest receivable	25,232	18,481
Goodwill and other intangible assets, net	493,176	319,506
Bank-owned life insurance	153,991	123,298
Other assets	123,205	89,072
Total Assets	8,233,279	6,296,565
Deposits:
Non-interest bearing demand	1,249,521	1,061,075
Interest bearing demand	1,199,801	885,037
Money market	1,018,184	954,957
Savings deposits	1,064,808	842,818
Certificates of deposit	1,883,888	1,305,096
Total deposits	6,416,202	5,048,983
Federal Home Loan Bank borrowings	432,456	223,126
Other short-term borrowings	76,630	80,690
Junior subordinated debt owed to unconsolidated subsidiary trusts	142,269	106,176
Total borrowings	651,355	409,992
Accrued interest payable	2,297	1,620
Other liabilities	72,041	47,780
Total Liabilities	7,141,895	5,508,375
SHAREHOLDERS' EQUITY
Preferred stock, no par value; 1,000,000 shares authorized; none outstanding
Common stock, $2.0833 par value; 50,000,000 shares authorized; 38,546,042 and 29,367,511 issued in 2015 and 2014, respectively; outstanding: 38,449,812 and 29,298,188 shares in 2015 and 2014, respectively	80,304	61,182
Capital surplus	520,596	244,661
Retained earnings	509,622	504,578
Treasury stock (96,230 and 69,323 shares in 2015 and 2014, respectively, at cost)	(3,061)	(2,151)
Accumulated other comprehensive loss	(13,624)	(18,825)
Deferred benefits for directors	(2,453)	(1,255)
Total Shareholders' Equity	1,091,384	788,190
Total Liabilities and Shareholders' Equity	$ 8,233,279	$ 6,296,565