Covered Assets (Schedule Of Change In Purchased Impaired Loans Accretable Yield And Carrying Amount) (Detail) (Covered Assets [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Covered Assets [Member]
Balance at beginning of period, Accretable Yield	$ 3,643		$ 15,928		$ 5,595		$ 13,253
Charge-offs/disposals, Accretable Yield	(2,050)	[1]	(790)	[1]	(2,226)	[1]	(1,188)	[1]
Reclassifications from nonaccretable difference, net, Accretable Yield	1,388		(4,199)		124		334
Accretion, Accretable Yield	(298)		(1,324)		(810)		(2,784)
Balance at end of period, Accretable Yield	2,683		9,615		2,683		9,615
Balance at beginning of period, Carrying Amount of Loans	42,002		67,977		49,495		71,258
Payments received, Carrying Amount of Loans	(2,789)		(4,915)		(6,428)		(8,618)
Charge-offs/disposals, Carrying Amount of Loans	(6,793)	[1]	(1,845)	[1]	(11,159)	[1]	(2,883)	[1]
Accretion, Carrying Amount of Loans	298		1,324		810		2,784
Balance at end of period, Carrying Amount of Loans	32,718		62,541		32,718		62,541
Contractual amount outstanding at period end	$ 44,052		$ 97,547		$ 44,052		$ 97,547

[1] Includes transfers to covered foreclosed real estate.