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Summary of Current and Deferred Income Tax Provision (Benefit) (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current income tax expense (benefit):      
Federal     $ (1,114)
State     (1,151)
Deferred income tax expense (benefit):      
Federal     1,821
State         
Total income tax expense (benefit)     $ (444)