Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Cash and due from banks	$ 845,905	$ 1,175,083
Money market investments:
Interest-bearing deposits	7,174,134	8,175,048
Federal funds sold and security resell agreements	1,386,291	282,248
Investment securities:
Held-to-maturity, at adjusted cost (approximate fair value $609,547 and $674,741)	647,252	588,981
Available-for-sale, at fair value	3,844,248	3,701,886
Trading account, at fair value	70,601	34,559
Marketable securities, total	4,562,101	4,325,426
Loans held for sale	132,504	171,328
Loans, net of unearned income and fees:
Total loans, net of unearned	40,064,016	39,043,365
Less allowance for loan losses	604,663	746,291
Loans, net of allowance	39,459,353	38,297,074
Other noninterest-bearing investments	865,950	855,642
Premises and equipment, net	829,809	726,372
Goodwill	1,014,129	1,014,129
Core deposit and other intangibles	25,520	36,444
Other real estate owned	18,916	46,105
Other assets	894,262	926,228
Total assets	57,208,874	56,031,127
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing demand	20,528,287	18,758,753
Interest-bearing:
Savings and Money Market	24,583,636	23,029,928
Time	2,406,924	2,593,038
Foreign	328,391	1,980,161
Total deposits	47,847,238	46,361,880
Federal funds purchased and security repurchase agreements	244,223	340,348
Long-term debt	1,092,282	2,273,575
Reserve for unfunded lending commitments	81,076	89,705
Other liabilities	574,525	501,056
Total liabilities	49,839,344	49,566,564
Shareholders' equity:
Preferred stock, without par value, authorized 4,400,000 shares	1,004,011	1,003,970
Common stock, without par value; authorized 350,000,000 shares; issued and outstanding 184,677,696 and 184,199,198 shares	4,723,855	4,179,024
Retained earnings	1,769,705	1,473,670
Accumulated Other Comprehensive Income (Loss), Net of Tax	(128,041)	(192,101)
Total shareholders' equity	7,369,530	6,464,563
Total liabilities and shareholders' equity	$ 57,208,874	$ 56,031,127