Earnings Per Share - Computation of Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Net Earnings	$ 6,154	$ 482	$ 6,653	$ 895
Weighted average common shares outstanding	13,546	7,468	13,466	7,344
Basic earnings per share	$ 0.45	$ 0.06	$ 0.49	$ 0.12
Net Earnings	$ 6,154	$ 482	$ 6,653	$ 895
Weighted average common shares outstanding	13,546	7,468	13,466	7,344
Dilutive effect of warrants	1,029	0	961	0
Dilutive effect of stock options	143	14	129	0
Total common shares and dilutive potential common shares	14,718	7,482	14,556	7,344
Diluted earnings per share	$ 0.42	$ 0.06	$ 0.46	$ 0.12