Loans (Activity Related To Accretable Yield Of Loans Acquired With Evidence Of Credit Quality Deterioration Since Origination) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Bank Acquisitions [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield, beginning balance	$ 130,856		$ 171,801		$ 143,224		$ 173,120
Acquisitions	0		6,052		1,977		8,340
Accretable yield amortized to interest income	(9,056)		(12,266)		(27,980)		(40,545)
Accretable yield amortized to indemnification asset	(8,279)	[1]	(16,472)	[1]	(28,891)	[1]	(55,912)	[1]
Reclassification from non-accretable difference	8,703	[2]	4,636	[2]	44,907	[2]	53,827	[2]
(Decreases) increases in interest cash flows due to payments and changes in interest rates	(5,194)		(1,951)		(16,207)		12,970
Accretable yield, ending balance	117,030	[3]	151,800	[3]	117,030	[3]	151,800	[3]
Life Insurance Premium Finance Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield, beginning balance	10,287		14,626		13,055		18,861
Acquisitions	0		0		0		0
Accretable yield amortized to interest income	(1,943)		(2,309)		(6,216)		(8,795)
Accretable yield amortized to indemnification asset	0	[1]	0	[1]	0	[1]	0	[1]
Reclassification from non-accretable difference	234	[2]	2,951	[2]	1,241	[2]	4,096	[2]
(Decreases) increases in interest cash flows due to payments and changes in interest rates	235		158		733		1,264
Accretable yield, ending balance	$ 8,813	[3]	$ 15,426	[3]	$ 8,813	[3]	$ 15,426	[3]

[1] Represents the portion of the current period accreted yield, resulting from lower expected losses, applied to reduce the loss share indemnification asset.

[2] Reclassification is the result of subsequent increases in expected principal cash flows.

[3] As of September 30, 2013, the Company estimates that the remaining accretable yield balance to be amortized to the indemnification asset for the bank acquisitions is $40.5 million. The remainder of the accretable yield related to bank acquisitions is expected to be amortized to interest income.