Allowance For Loan Losses (Summary Of Changes In The Allowance For Loan Losses By Class) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Balance at beginning of period	$ 107,612	$ 109,592	$ 106,120	$ 104,655
Charge-offs	(7,570)	(8,636)	(14,903)	(16,285)
Recoveries	631	845	1,228	1,467
Provision for loan losses	8,551	12,239	16,779	24,203
Balance at end of period	109,224	114,040	109,224	114,040
Commercial [Member]
Balance at beginning of period	76,408		74,606
Charge-offs	(3,739)		(7,028)
Recoveries	189		329
Provision for loan losses	5,100		10,051
Balance at end of period	77,958		77,958
Direct Installment [Member]
Balance at beginning of period	14,767		14,941
Charge-offs	(2,274)		(4,502)
Recoveries	205		434
Provision for loan losses	2,217		4,042
Balance at end of period	14,915		14,915
Residential Mortgages [Member]
Balance at beginning of period	4,514		4,578
Charge-offs	(169)		(407)
Recoveries	23		31
Provision for loan losses	112		278
Balance at end of period	4,480		4,480
Indirect Installment [Member]
Balance at beginning of period	5,761		5,941
Charge-offs	(604)		(1,537)
Recoveries	156		294
Provision for loan losses	392		1,007
Balance at end of period	5,705		5,705
Consumer Lines Of Credit [Member]
Balance at beginning of period	4,612		4,743
Charge-offs	(422)		(818)
Recoveries	44		87
Provision for loan losses	562		784
Balance at end of period	4,796		4,796
Commercial Leases [Member]
Balance at beginning of period	1,254		1,070
Charge-offs	(120)		(205)
Recoveries	13		30
Provision for loan losses	126		378
Balance at end of period	1,273		1,273
Other [Member]
Balance at beginning of period	296		241
Charge-offs	(242)		(406)
Recoveries	1		23
Provision for loan losses	42		239
Balance at end of period	$ 97		$ 97