FDIC Indemnification Asset (Details) (USD $)	6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
FDIC Indemnification Asset [Abstract]
FDIC True-up provisions	$ 1,200,000				$ 1,100,000
Write-down of FDIC indemnification asset	3,700,000		2,400,000
Balance, beginning of period	21,774,000		28,348,000
Accretion	41,000		128,000
Transfers to FDIC claims receivable	(608,000)		(733,000)
Change in expected cash flows	(3,740,000)	[1]	(2,299,000)	[1]
Change in FDIC true up provision	(125,000)		(135,000)
Balance, end of period	$ 17,342,000		$ 25,309,000

[1] The decrease during the first six months of 2013 was due to loan pay-offs, improved cash flow projections, and lower loss expectations for covered loans.