Loans (Activity Related to Accretable Yield of Loans Acquired with Evidence of Credit Quality Deterioration Since Origination) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Bank Acquisitions [Member]
Loans [Line Items]
Accretable yield, beginning balance	$ 173,120	[1]	$ 39,809
Acquisitions	8,217		29,447
Accretable yield amortized to interest income	(52,101)		(39,171)
Accretable yield amortized to indemnification asset	(66,798)	[2]	(37,888)	[2]
Reclassification from non-accretable difference	64,603	[3]	163,403	[3]
Increases in interest cash flows due to payments and changes in interest rates	16,183		17,520
Accretable yield, ending balance	143,224	[1]	173,120	[1]
Life Insurance Premium Finance Acquisition [Member]
Loans [Line Items]
Accretable yield, beginning balance	18,861	[1]	33,315
Acquisitions	0		0
Accretable yield amortized to interest income	(11,441)		(22,109)
Accretable yield amortized to indemnification asset	0	[2]	0	[2]
Reclassification from non-accretable difference	4,096	[3]	5,215	[3]
Increases in interest cash flows due to payments and changes in interest rates	1,539		2,440
Accretable yield, ending balance	$ 13,055	[1]	$ 18,861	[1]

[1] As of December 31, 2012, the Company estimates that the remaining accretable yield balance to be amortized to the indemnification asset for the bank acquisitions is $54.5 million. The remainder of the accretable yield related to bank acquisitions is expected to be amortized to interest income.

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

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