Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 260,525	$ 336,150
Overnight investments	1,223,311	1,387,927
Marketable equity securities	107,264	0
Investment securities available for sale	4,783,507	7,180,180
Investment securities held to maturity	2,299,774	76
Loans held for sale	58,961	51,179
Loans and Leases	24,538,437	23,596,825
Less allowance for loan and lease losses	(224,865)	(221,893)
Net loans and leases	24,313,572	23,374,932
Premises and equipment	1,167,532	1,138,431
Other real estate	46,633	51,097
Income earned not collected	99,567	95,249
Goodwill	208,217	150,601
Other intangible assets	77,370	73,096
Other assets	442,333	688,594
Total assets	35,088,566	34,527,512
Liabilities
Noninterest-bearing deposits	12,181,717	11,237,375
Interest-bearing deposits	18,227,167	18,028,900
Total deposits	30,408,884	29,266,275
Short-term borrowings	613,993	693,807
Long-term obligations	241,360	870,240
FDIC shared-loss payable	103,487	101,342
Other liabilities	273,956	261,784
Total liabilities	31,641,680	31,193,448
Shareholders' Equity
Surplus	658,918	658,918
Retained earnings	3,020,596	2,785,430
Accumulated other comprehensive loss	(244,638)	(122,294)
Total shareholders' equity	3,446,886	3,334,064
Total liabilities and shareholders' equity	35,088,566	34,527,512
Class A Common Stock
Shareholders' Equity
Common stock	11,005	11,005
Class B Common Stock
Shareholders' Equity
Common stock	$ 1,005	$ 1,005