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Earnings Per Share and Dividends - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
May 02, 2018
Mar. 31, 2018
Mar. 31, 2017
Dividends Payable [Line Items]      
Cash dividends declared per share of Class A common stock   $ 0.20 $ 0.18
Dividends declared and paid   $ 3,547  
Distributions declared to non-controlling unitholders $ 2,500    
Common Class A      
Dividends Payable [Line Items]      
Cash dividends declared per share of Class A common stock   $ 0.20 $ 0.18
Dividends declared and paid   $ 3,547 $ 3,184
Quarterly dividend | Common Class A      
Dividends Payable [Line Items]      
Cash dividends declared per share of Class A common stock $ 0.20    
Non-controlling interest      
Dividends Payable [Line Items]      
Distributions declared to non-controlling unitholders   $ 2,512 $ 2,261