Annual report pursuant to section 13 and 15(d)

Income Taxes - Classification of Net Deferred Income Taxes (Detail)

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Income Taxes - Classification of Net Deferred Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]    
Deferred tax assets, Current $ 2,296 $ 1,971
Deferred tax liabilities, Current     
Net deferred income taxes, Current 2,296 1,971
Deferred tax asset, Long-term 19,011 21,751
Deferred tax liabilities, Long-term (2,711) (3,945)
Net deferred income taxes, Long-term 16,300 17,806
Total deferred Federal income tax assets 21,307 23,722
Total deferred Federal income tax liabilities (2,711) (3,945)
Net deferred income taxes $ 18,596 $ 19,777