Fair Value Measurements - (Details 4) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
OREO covered under loss-share agreements:
OREO covered under loss-share agreements	$ 341	$ 1,813
OREO not covered under loss-share agreements:
OREO not covered under loss-share agreements	6,061	2,647
Carrying amount prior to remeasurement
OREO covered under loss-share agreements:
OREO covered under loss-share agreements	589	3,162
OREO not covered under loss-share agreements:
OREO not covered under loss-share agreements	7,403	3,513
Impairment recognized in results of operations
OREO covered under loss-share agreements:
OREO covered under loss-share agreements	(50)	(185)
OREO not covered under loss-share agreements:
OREO not covered under loss-share agreements	(1,342)	(866)
Increase in FDIC loss-share indemnification asset
OREO covered under loss-share agreements:
OREO covered under loss-share agreements	(198)	(742)
Receivable from other guarantor
OREO covered under loss-share agreements:
OREO covered under loss-share agreements	$ 0	$ (422)