Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
OREO measured at fair value on a nonrecurring basis
OREO covered under loss-share agreements:	$ 1,813	$ 8,763
OREO not covered under loss-share agreements:	2,647	27,543
Carrying amount prior to remeasurement
OREO measured at fair value on a nonrecurring basis
OREO covered under loss-share agreements:	3,162	13,067
OREO not covered under loss-share agreements:	3,513	30,436
Impairment recognized in results of operations
OREO measured at fair value on a nonrecurring basis
OREO covered under loss-share agreements:	(185)	(707)
OREO not covered under loss-share agreements:	(866)	(2,893)
Increase in FDIC loss-share indemnification asset
OREO measured at fair value on a nonrecurring basis
OREO covered under loss-share agreements:	(742)	(2,829)
Receivable from other guarantor
OREO measured at fair value on a nonrecurring basis
OREO covered under loss-share agreements:	$ (422)	$ (768)