Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 534,086	$ 604,182
Overnight investments	2,063,132	1,724,919
Investment securities available for sale	6,861,293	7,171,917
Investment securities held to maturity	255	518
Loans Receivable Held-for-sale, Amount	59,766	63,696
Loans and leases:
Purchased credit-impaired (PCI)	950,516	1,186,498
Non-PCI	19,289,474	17,582,967
Less allowance for loan and lease losses	(206,216)	(204,466)
Net Loans and Leases	20,033,774	18,564,999
Loans and Leases Receivable, Gross	20,239,990	18,769,465
Premises and equipment	1,135,829	1,125,081
Other real estate owned:
Other Real Estate, Covered	6,817	22,982
Other Real Estate, Non Covered	58,742	70,454
Income earned not collected	70,036	57,254
FDIC loss share receivable	4,054	28,701
Goodwill	139,773	139,773
Intangible Assets, Net (Excluding Goodwill)	90,986	106,610
Other assets	417,391	394,027
Total assets	31,475,934	30,075,113
Liabilities
Noninterest-bearing	9,274,470	8,086,784
Interest-bearing	17,656,285	17,591,793
Total deposits	26,930,755	25,678,577
Debt, Current	594,733	987,184
Long-term obligations	704,155	351,320
FDIC loss share payable	126,453	116,535
Other liabilities	247,729	253,903
Total liabilities	28,603,825	27,387,519
Shareholders' Equity
Surplus	658,918	658,918
Retained earnings	2,265,621	2,069,647
Accumulated other comprehensive loss	(64,440)	(52,981)
Total shareholders' equity	2,872,109	2,687,594
Total liabilities and shareholders' equity	31,475,934	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