Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 514,404	$ 604,182
Overnight investments	1,703,341	1,724,919
Investment securities available for sale	7,350,194	7,171,917
Investment securities held to maturity	351	518
Loans held for sale	85,040	63,696
Purchased credit-impaired (PCI)	1,123,239	1,186,498
Less allowance for loan and lease losses	(208,317)	(204,466)
Net loans and leases	19,311,868	18,564,999
Loans and Leases Receivable, Gross	19,520,185	18,769,465
Premises and equipment	1,121,421	1,125,081
Other real estate owned:
Other Real Estate, Covered	12,890	22,982
Other Real Estate, Non Covered	60,358	70,454
Income earned not collected	66,729	57,254
FDIC Indemnification Asset	5,808	28,701
Goodwill	139,773	139,773
Other intangible assets	98,998	106,610
Other assets	425,680	394,027
Total assets	30,896,855	30,075,113
Liabilities
Noninterest-bearing	8,970,056	8,086,784
Interest-bearing	17,541,840	17,591,793
Total deposits	26,511,896	25,678,577
Short-term borrowings	723,225	987,184
Long-term obligations	475,568	351,320
FDIC loss share payable	122,038	116,535
Other liabilities	270,238	253,903
Total liabilities	28,102,965	27,387,519
Shareholders' Equity
Surplus	658,918	658,918
Retained earnings	2,174,121	2,069,647
Accumulated other comprehensive loss	(51,159)	(52,981)
Total shareholders' equity	2,793,890	2,687,594
Total liabilities and shareholders' equity	30,896,855	30,075,113
Class A Common Stock
Shareholders' Equity
Common stock	11,005	11,005
Class B Common Stock
Shareholders' Equity
Common stock	$ 1,005	$ 1,005