Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 139,909	$ 130,593
Short-term interest bearing accounts	15,601	9,704
Securities available for sale, at fair value	1,259,874	1,174,544
Securities held to maturity (fair value $475,110 and $473,140, respectively)	466,914	471,031
Trading securities	8,905	8,377
Federal Reserve and Federal Home Loan Bank stock	32,262	36,673
Loans	5,967,809	5,883,133
Less allowance for loan losses	64,318	63,018
Net loans	5,903,491	5,820,115
Premises and equipment, net	86,407	88,826
Goodwill	265,957	265,957
Intangible assets, net	16,168	17,265
Bank owned life insurance	161,878	117,044
Other assets	115,598	122,517
Total assets	8,472,964	8,262,646
Liabilities
Demand (noninterest bearing)	2,008,763	1,998,165
Savings, NOW, and money market	4,007,621	3,697,851
Time	888,658	908,827
Total deposits	6,905,042	6,604,843
Short-term borrowings	347,868	442,481
Long-term debt	130,377	130,447
Junior subordinated debt	101,196	101,196
Other liabilities	106,754	101,675
Total liabilities	7,591,237	7,380,642
Stockholders' equity
Preferred stock, $0.01 par value. Authorized 2,500,000 shares at March 31, 2016 and December 31, 2015	0	0
Common stock, $0.01 par value. Authorized 100,000,000 shares at March 31, 2016 and December 31, 2015; issued 49,651,494 at March 31, 2016 and December 31, 2015	497	497
Additional paid-in-capital	573,754	576,726
Retained earnings	471,650	462,232
Accumulated other comprehensive loss	(13,871)	(22,418)
Common stock in treasury, at cost, 6,789,653 and 6,220,792 shares at March 31, 2016 and December 31, 2015, respectively	(150,303)	(135,033)
Total stockholders' equity	881,727	882,004
Total liabilities and stockholders' equity	$ 8,472,964	$ 8,262,646