Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Operating Activities:
Net income	$ 45,618		$ 51,121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,275		13,325
Loan loss provision	2,600		6,400
Net amortization of deferred loan fees	(179)		(333)
Decrease in interest income receivable	1,537		1,420
Decrease in other assets	1,390		7,344
(Decrease) increase in income taxes payable	(1,160)		856
Increase in net deferred tax asset	(19)		(3,719)
(Decrease) increase in interest expense payable	(102)		50
Decrease in other liabilities	(3,841)		(984)
Stock option compensation expense	1,009		1,081
Tax benefit decrease upon exercise of stock options	447		202
Gain on sale of other assets	(400)		(548)
Net loss on sale of premises and equipment	22		16
Originations of mortgage loans for resale			(441)
Proceeds from sale of mortgage loans originated for resale			447
Net gain on sale of foreclosed assets	(1,014)		(892)
Writedown of foreclosed assets	113		1,752
Net Cash Provided by Operating Activities	58,296		77,097
Investing Activities:
Net repayments of loans	93,115		231,002
Proceeds from FDIC1 loss-sharing indemnification	6,703	[1]	6,478	[1]
Purchases of investment securities available for sale	(747,630)		(355,440)
Proceeds from sale/maturity/calls of securities available for sale	444,906		100,660
Purchases of investment securities held to maturity	(26,435)		(152,116)
Proceeds from maturity/calls of securities held to maturity	115,799		164,369
Purchases of premises and equipment	(2,392)		(1,581)
Net change in FRB2/FHLB3 securities	3,248	[2],[3]	2,243	[2],[3]
Proceeds from sale of foreclosed assets	7,549		14,986
Net Cash (Used in) Provided by Investing Activities	(105,137)		10,601
Financing Activities:
Net change in deposits	157,947		(123,914)
Net change in short-term borrowings and FHLB3 advances	3,992		(5,866)
Exercise of stock options	12,396		9,219
Tax benefit decrease upon exercise of stock options	(447)		(202)
Retirement of common stock including repurchases	(44,810)		(39,789)
Common stock dividends paid	(29,927)		(29,949)
Net Cash Provided by (Used in) Financing Activities	99,151		(190,501)
Net Change In Cash and Due from Banks	52,310		(102,803)
Cash and Due from Banks at Beginning of Period	472,028		491,382
Cash and Due from Banks at End of Period	524,338		388,579
Supplemental disclosure of non cash activities:
Loan collateral transferred to other real estate owned	968		5,404
Securities purchases pending settlement	2,622		1,961
Supplemental disclosure of cash flow activities:
Interest paid for the period	2,959		3,982
Income tax payments for the period	$ 14,981		$ 17,931

[1] Federal Deposit Insurance Corporation ("FDIC")

[2] Federal Reserve Bank ("FRB")

[3] Federal Home Loan Bank ("FHLB")