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Recent Accounting Pronouncements - Additional Information (Detail) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Current deferred income tax asset   $ 0
Noncurrent deferred income tax liability $ 5,001,000 4,876,000
Amount Previously Recognized    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Current deferred income tax asset   2,400,000
Noncurrent deferred income tax liability   7,300,000
Accounting Standards Update 2015-17 [Member]    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Noncurrent deferred income tax liability   $ 4,900,000