Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Cash Flows [Abstract]
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 46,276	$ 58,738
INVESTING ACTIVITIES:
Net (increase) decrease in loans	(54,935)	9,729
Securities available-for-sale:
Proceeds from sales	42,810
Proceeds from maturities, prepayments and calls	276,664	171,140
Purchases of securities	(327,595)	(150,954)
Securities held-to-maturity:
Proceeds from maturities, prepayments and calls	58,668	42,039
Purchases of securities	(40,239)	(161,448)
Purchases of premises and equipment - net	(1,497)	(1,349)
Sale of portfolio loans - net	2,852
Net cash used in investing activities	(43,272)	(90,843)
FINANCING ACTIVITIES:
(Decrease) increase in deposits	(90)	48,970
Repayment of Federal Home Loan Bank borrowings	(26,191)	(26,518)
(Decrease) increase in other short-term borrowings	(5,375)	6,547
Increase in federal funds purchased	0	15,000
Dividends paid to common shareholders	(8,788)	(7,711)
Treasury shares (purchased) sold - net	(70)	26
Net cash (used in) provided by financing activities	(40,514)	36,314
Net (decrease) in cash and cash equivalents	(37,510)	4,209
Cash and cash equivalents at beginning of the period	140,325	79,136
Cash and cash equivalents at end of the period	102,815	83,345
SUPPLEMENTAL DISCLOSURES:
Interest paid on deposits and other borrowings	23,089	29,263
Income taxes paid	6,445	5,850
Transfers of loans to other real estate owned	2,424	1,004
Transfer of loans to held for sale	$ 5,075