Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 175,804	$ 147,789
Short-term interest bearing accounts	6,012	1,392
Securities available for sale, at fair value	1,357,614	1,338,290
Securities held to maturity (fair value $495,411 and $525,050)	494,309	527,948
Trading securities	10,883	9,259
Federal Reserve and Federal Home Loan Bank stock	45,070	47,033
Loans	6,466,934	6,198,057
Less allowance for loan losses	68,350	65,200
Net loans	6,398,584	6,132,857
Premises and equipment, net	81,421	84,187
Goodwill	268,043	265,439
Intangible assets, net	15,911	15,815
Bank owned life insurance	171,125	168,012
Other assets	130,620	129,247
Total assets	9,155,396	8,867,268
Liabilities
Demand (noninterest bearing)	2,312,715	2,195,845
Savings, NOW and money market	4,141,765	3,905,432
Time	776,756	872,411
Total deposits	7,231,236	6,973,688
Short-term borrowings	681,950	681,703
Long-term debt	88,914	104,087
Junior subordinated debt	101,196	101,196
Other liabilities	96,862	93,278
Total liabilities	8,200,158	7,953,952
Stockholders' equity
Preferred stock, $0.01 par value. Authorized 2,500,000 shares at September 30, 2017 and December 31, 2016	0	0
Common stock, $0.01 par value. Authorized 100,000,000 shares at September 30, 2017 and December 31, 2016; issued 49,651,493 at September 30, 2017 and December 31, 2016	497	497
Additional paid-in-capital	573,772	575,078
Retained earnings	536,107	501,761
Accumulated other comprehensive loss	(16,664)	(21,520)
Common stock in treasury, at cost, 6,122,595 and 6,393,743 shares at September 30, 2017 and December 31, 2016, respectively	(138,474)	(142,500)
Total stockholders' equity	955,238	913,316
Total liabilities and stockholders' equity	$ 9,155,396	$ 8,867,268