Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Operating Activities:
Net income	$ 15,307		$ 17,271
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,103		4,322
Loan loss provision	1,000		2,800
Net amortization of deferred loan fees	(30)		(80)
Decrease (increase) in interest income receivable	643		(199)
Increase in deferred tax asset	(756)		(673)
Increase in other assets	(185)		(663)
Stock option compensation expense	359		379
Tax benefit decrease upon exercise of stock options	369		191
Increase in income taxes payable	5,232		5,482
Increase in interest expense payable	5		252
Increase (decrease) in other liabilities	8,507		(6,726)
Gain on sale of other assets	(400)		(274)
Writedown/loss on sale of premises and equipment	16		6
Originations of mortgage loans for resale			(90)
Proceeds from sale of mortgage loans originated for resale			92
Net gain on sale of foreclosed assets	(493)		(181)
Writedown of foreclosed assets	69		592
Net Cash Provided by Operating Activities	33,746		22,501
Investing Activities:
Net repayments of loans	9,598		72,880
Proceeds from FDIC* loss-sharing agreement	44	[1]	1,344	[1]
Purchases of investment securities available for sale	(237,948)		(175,901)
Proceeds from sale/maturity/calls of securities available for sale	99,350		30,166
Purchases of investment securities held to maturity	(17,993)		(59,677)
Proceeds from maturity/calls of securities held to maturity	34,403		51,876
Purchases of premises and equipment	(166)		(617)
Proceeds from sale of FRB/FHLB** stock	3,248	[2]	738	[2]
Proceeds from sale of foreclosed assets	2,159		2,611
Net Cash Used in Investing Activities	(107,305)		(76,580)
Financing Activities:
Net change in deposits	51,063		(70,450)
Net change in short-term borrowings	1,620		8,167
Exercise of stock options/issuance of shares	10,853		6,156
Tax benefit decrease upon exercise of stock options	(369)		(191)
Retirement of common stock including repurchases	(22,710)		(15,442)
Common stock dividends paid	(10,086)		(10,084)
Net Cash Provided by (Used in) Financing Activities	30,371		(81,844)
Net Change In Cash and Due from Banks	(43,188)		(135,923)
Cash and Due from Banks at Beginning of Period	472,028		491,382
Cash and Due from Banks at End of Period	428,840		355,459
Supplemental disclosure of noncash activities:
Loan collateral transferred to other real estate owned	968		640
Securities purchases pending settlement	(11,231)
Supplemental disclosure of cash flow activities:
Interest paid for the period	987		1,132
Income tax payments for the period			$ 126

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

[2] Federal Reserve Bank/Federal Home Loan Bank ("FRB/FHLB")