Loans (Activity Related to Accretable Yield of Loans Acquired with Evidence of Credit Quality Deterioration Since Origination) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Bank acquisitions
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield, beginning balance	$ 107,655,000	[1]	$ 143,224,000
Acquisitions	0		5,428,000
Accretable yield amortized to interest income	29,893,000		36,898,000
Accretable yield amortized to indemnification asset	(30,691,000)	[2]	(36,202,000)	[2]
Reclassification from non-accretable difference	35,782,000	[3]	50,873,000	[3]
(Decreases) increases in interest cash flows due to payments and changes in interest rates	(5,368,000)		(18,770,000)
Accretable yield, ending balance	77,485,000	[1]	107,655,000	[1]
Certain Loans Acquired In Transfer Not Accounted fo as Debt Securities, Accretable Yield, To Be Amortized To Indem Asset	18,500,000
Life insurance premium finance loans acquisition
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield, beginning balance	8,254,000	[1]	13,055,000
Acquisitions	0		0
Accretable yield amortized to interest income	7,063,000		8,795,000
Accretable yield amortized to indemnification asset	0	[2]	0	[2]
Reclassification from non-accretable difference	185,000	[3]	2,840,000	[3]
(Decreases) increases in interest cash flows due to payments and changes in interest rates	241,000		1,154,000
Accretable yield, ending balance	$ 1,617,000	[1]	$ 8,254,000	[1]

[1] As of December 31, 2014, the Company estimates that the remaining accretable yield balance to be amortized to the indemnification asset for the bank acquisitions is $18.5 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 indemnification asset.

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