Parent Company Only Financial Information - Summary of Statements of Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income
Total interest income	$ 70,763	$ 73,287	$ 80,792
Interest expense	5,557	8,478	13,953
Other expenses	9,472	9,023	7,974
Income tax benefit	(40,385)	0	0
NET INCOME (LOSS)	51,989	(710)	6,667
Parent Company [Member]
Income
Dividends from subsidiary Bank	0	0	0
Interest/other	28	29	79
Total interest income	28	29	79
Interest expense	958	1,057	1,152
Other expenses	450	575	405
Loss before income tax benefit and equity in undistributed income of subsidiaries	(1,380)	(1,603)	(1,478)
Income tax benefit	(2,281)	0	0
Income (loss) before equity in undistributed income of subsidiaries	901	(1,603)	(1,478)
Equity in undistributed income of subsidiaries	51,088	893	8,145
NET INCOME (LOSS)	$ 51,989	$ (710)	$ 6,667