Consolidated Statements of Financial Position - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Cash and cash equivalents:
Cash and cash due from banks	$ 168,739	$ 194,136	$ 121,796
Interest-bearing deposits with the Federal Reserve Bank and other banks	122,635	44,653	272,142
Total cash and cash equivalents	291,374	238,789	393,938
Investment securities:
Available-for-sale, at fair value	514,015	553,731	680,644
Held-to-maturity (fair value - $525,593 at March 31, 2016, $512,705 at December 31, 2015 and $380,176 at March 31, 2015)	518,300	509,971	381,450
Total investment securities	1,032,315	1,063,702	1,062,094
Loans held-for-sale, at fair value	9,667	10,327	9,675
Loans	7,366,885	7,271,147	5,702,874
Allowance for loan losses	(70,318)	(73,328)	(75,256)
Net loans	7,296,567	7,197,819	5,627,618
Premises and equipment (net of accumulated depreciation of $121,762 at March 31, 2016, $120,382 at December 31, 2015 and $111,270 at March 31, 2015)	105,868	106,317	96,486
Goodwill	286,867	287,393	180,128
Other intangible assets	36,266	38,104	31,655
Interest receivable and other assets	244,708	246,346	150,041
Total Assets	9,303,632	9,188,797	7,551,635
Deposits:
Noninterest-bearing	1,951,193	1,934,583	1,614,319
Interest-bearing	5,698,923	5,522,184	4,706,034
Total deposits	7,650,116	7,456,767	6,320,353
Interest payable and other liabilities	64,120	76,466	48,545
Securities Sold under Agreements to Repurchase	283,383	297,199	372,236
Short-term Borrowings	0	100,000	0
Other Borrowings	273,722	242,391	0
Total liabilities	8,271,341	8,172,823	6,741,134
Shareholders’ equity:
Preferred stock, no par value: Authorized - 2,000,000 shares at both March 31, 2016 and December 31, 2015 and 200,000 shares at March 31, 2015, none issued	0	0	0
Common stock, $1 par value per share, Authorized - 60,000,000 shares at both March 31, 2016 and December 31, 2015 and 45,000,000 shares at March 31, 2015, Issued and outstanding — 38,248,489 shares at March 31, 2016, 38,167,861 shares at December 31, 2015 and 32,487,063 shares at March 31, 2015	38,248	38,168	32,847
Additional paid-in capital	725,874	725,280	565,851
Retained earnings	294,859	281,558	241,582
Accumulated other comprehensive loss	(26,690)	(29,032)	(29,779)
Total shareholders’ equity	1,032,291	1,015,974	810,501
Total Liabilities and Shareholders’ Equity	$ 9,303,632	$ 9,188,797	$ 7,551,635