Loans (Activity Related to Accretable Yield of Loans Acquired with Evidence of Credit Quality Deterioration Since Origination) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield, beginning balance		$ 79,102	[1]	$ 115,909
Acquisitions		9,993		0
Accretable yield amortized to interest income		(24,115)		(36,956)
Accretable yield amortized to indemnification asset	[2]	(13,495)		(30,691)
Reclassifications from nonaccretable difference	[3]	7,390		35,967
Increases (decreases) in interest cash flows due to payments and changes in interest rates		5,027		(5,127)
Accretable yield, ending balance	[1]	63,902		$ 79,102
Bank acquisitions
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Remaining accretable yield balance to be amortized		$ 6,600

[1] As of December 31, 2015, the Company estimates that the remaining accretable yield balance to be amortized to the indemnification asset for the bank acquisitions is $6.6 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.