Other Real Estate Owned (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate Acquired Through Foreclosure [Roll Forward]
Balance at beginning of year	$ 32,571	$ 37,452	$ 33,632
Additions	11,545	43,541	26,644
Capitalized improvements	65	75	14
Valuation adjustments	(3,512)	(6,724)	(7,464)
Dispositions	(25,165)	(41,773)	(15,374)
Balance at end of year	15,504	32,571	37,452
Valuation adjustments	(3,512)	(6,724)	(7,464)
Write-down due to change in appraised value	1,083	702	4,197
Write-down due to change in management estimates	$ 2,429	$ 6,022	$ 3,267