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Dividends - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jul. 19, 2017
Jun. 18, 2017
Jun. 19, 2016
Jun. 18, 2017
Jun. 19, 2016
Jan. 01, 2017
[1]
Dividends Payable [Line Items]            
Dividends declared per share   $ 0.46 $ 0.38 $ 0.92 $ 0.76  
Common stock dividends accrued   $ 22,648   $ 22,648   $ 619
Dividend declared date   Apr. 25, 2017        
Record date of dividend   Jun. 15, 2017        
Dividend payable date   Jun. 30, 2017        
Subsequent Event [Member]            
Dividends Payable [Line Items]            
Dividends declared per share $ 0.46          
Record date of dividend Sep. 15, 2017          
Dividend payable date Sep. 30, 2017          
[1] Note: The balance sheet at January 1, 2017 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.