Discontinued Operations - Summary of Operating Results of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss	$ 0	$ (29)	$ (1,158)	$ (160)
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating revenue	0	1,105	(358)	3,376
Non-interest expenses	0	(1,155)	(1,369)	(3,653)
Loss before income taxes	0	(50)	(1,727)	(277)
Income tax benefit	0	(21)	(569)	(117)
Net loss	$ 0	$ (29)	$ (1,158)	$ (160)