Consolidated Statements of Condition - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 254,622,000	$ 265,357,000
Investment securities:
Held to maturity debt securities (Market value of $2,400 on March 31, 2018 and $2,400 on December 31, 2017)	2,400,000	2,400,000
Available for sale debt securities (Amortized cost of $3,955,525 on March 31, 2018 and $4,196,263 on December 31, 2017)	3,868,173,000	4,124,185,000
Equity securities with readily determinable fair values	27,301,000	27,885,000
Total investment securities	3,897,874,000	4,154,470,000
Loans	6,453,103,000	6,348,172,000
Less allowance for probable loan losses	(67,154,000)	(67,687,000)
Net loans	6,385,949,000	6,280,485,000
Bank premises and equipment, net	511,696,000	514,454,000
Accrued interest receivable	32,773,000	34,456,000
Other investments	558,410,000	571,415,000
Goodwill	282,532,000	282,532,000
Other assets	146,756,000	81,529,000
Total assets	12,070,612,000	12,184,698,000
Deposits:
Demand - non-interest bearing	3,439,357,000	3,243,255,000
Savings and interest bearing demand	3,393,766,000	3,245,131,000
Time	2,021,789,000	2,056,506,000
Total deposits	8,854,912,000	8,544,892,000
Securities sold under repurchase agreements	258,953,000	353,805,000
Other borrowed funds	831,600,000	1,195,225,000
Junior subordinated deferrable interest debentures	160,416,000	160,416,000
Other liabilities	133,473,000	91,380,000
Total liabilities	10,239,354,000	10,345,718,000
Shareholders' equity:
Common shares of $1.00 par value. Authorized 275,000,000 shares; issued 96,044,041 shares on March 31, 2018 and 95,910,143 shares on December 31, 2017	96,044,000	96,019,000
Surplus	172,416,000	171,816,000
Retained earnings	1,923,411,000	1,891,805,000
Accumulated other comprehensive loss (including $0 on March 31, 2018 and $(3,287) on December 31, 2017 of comprehensive loss related to other-than-temporary impairment for non-credit related issues)	(68,350,000)	(28,397,000)
Total shareholders' equity before treasury stock	2,123,521,000	2,131,243,000
Less cost of shares in treasury, 29,939,545 shares on March 31, 2018 and 29,934,675 on December 31, 2017	(292,263,000)	(292,263,000)
Total shareholders' equity	1,831,258,000	1,838,980,000
Total liabilities and shareholders' equity	$ 12,070,612,000	$ 12,184,698,000