Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities:
Net income	$ 67,177	$ 81,127	$ 87,888
Depreciation and amortization/accretion	18,015	14,074	14,253
Loan loss provision	8,000	11,200	11,200
Net amortization of deferred loan fees	(420)	(506)	(434)
Decrease (increase) in interest income receivable	1,249	2,396	(172)
(Increase) decrease in deferred tax asset	(1,618)	(6,952)	2,094
Decrease in other assets	5,814	142	2,773
Stock option compensation expense	1,397	1,450	1,425
Tax benefit decrease upon exercise of stock options	298	119	248
(Decrease) increase in income taxes payable	(1,677)	(1,439)	2,074
Decrease in interest expense payable	(274)	(334)	(1,338)
(Decrease) increase in other liabilities	(12,510)	17,147	431
Loss on sale of securities available for sale		1,287
Gain on sale of real estate and other assets	(548)	(1,056)	(1,200)
Write-down/net loss(gain) on sale/ of premises and equipment	17	117	(398)
Originations of mortgage loans for resale	(501)	(675)	(595)
Proceeds from sale of mortgage loans originated for resale	509	707	616
Net write-down/loss on sale of foreclosed assets	387	660	1,528
Net Cash Provided By Operating Activities	85,315	119,464	120,393
Investing Activities:
Net repayments of loans	274,774	385,042	341,515
Proceeds from FDIC1 loss-sharing agreement	7,069	28,423	7,658
Purchases of investment securities available for sale	(418,745)	(384,363)	(290,610)
Proceeds from sale/maturity/calls of securities available for sale	144,886	203,036	331,933
Purchases of investment securities held to maturity	(196,536)	(484,002)	(428,511)
Proceeds from maturity/calls of securities held to maturity	217,652	232,226	95,898
Purchases of premises and equipment	(1,693)	(4,834)	(3,309)
Proceeds from sale of premises and equipment			640
Purchases of FRB2/FHLB3 securities			(14,069)
Proceeds from sale of FRB2/FHLB3/FHLMC4 securities	3,166	2,088	1,829
Proceeds from sale of foreclosed assets	20,349	28,081	24,671
Net Cash Provided By Investing Activities	50,922	5,697	67,645
Financing Activities:
Net change in deposits	(68,357)	(16,835)	118,131
Net change in short-term borrowings and FHLB3 advances	3,981	(62,001)	(16,868)
Repayments of notes payable	(15,000)		(10,000)
Exercise of stock options/issuance of shares	21,499	7,635	14,374
Tax benefit decrease upon exercise of stock options	(298)	(119)	(248)
Retirement of common stock including repurchases	(57,320)	(51,499)	(60,505)
Common stock dividends paid	(40,096)	(41,005)	(41,670)
Net Cash (Used In) Provided By Financing Activities	(155,591)	(163,824)	3,214
Net Change In Cash and Due from Banks	(19,354)	(38,663)	191,252
Cash and Due from Banks at Beginning of Year	491,382	530,045	338,793
Cash and Due from Banks at End of Year	472,028	491,382	530,045
Supplemental disclosure of noncash activities:
Loans transferred to other real estate owned	8,643	11,619	39,453
Supplemental disclosure of cash flow activity:
Interest paid for the period	5,452	6,814	11,271
Income tax payments for the period	$ 22,562	$ 34,111	$ 28,826