Acquisitions and Dispositions - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Nov. 07, 2014
Aug. 01, 2014
Dec. 31, 2014
Country Weekly Acquisition      
Business Acquisition [Line Items]      
Total purchase price $ 3,000    
Wise Brothers Acquisition      
Business Acquisition [Line Items]      
Total purchase price   $ 5,500 $ 5,500