Consolidated balance sheets (Parenthetical) - $ / shares
Mar. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Preferred stock, shares authorized 5,000,000    
Preferred stock, shares issued 0    
Preferred stock, shares outstanding 0    
Common Class A      
Common stock, par value (in dollars per share) $ 0.01    
Common stock, shares authorized 180,000,000    
Common stock, shares issued 37,110,630    
Common stock, shares outstanding 37,110,630    
Common Class B      
Common stock, par value (in dollars per share) $ 0.01    
Common stock, shares authorized 20,000,000    
Common stock, shares issued 7,871,512    
Common stock, shares outstanding 7,871,512    
Predecessor      
Preferred stock, shares authorized   600,000 600,000
Preferred stock, shares issued   0 0
Preferred stock, shares outstanding   0 0
Common stock, shares outstanding   1,392,706 1,404,309
Predecessor | Common Class A      
Common stock, par value (in dollars per share)   $ 0.01 $ 0.01
Common stock, shares authorized   10,000,000 10,000,000
Common stock, shares issued   333,686 345,289
Common stock, shares outstanding   333,686 345,289
Predecessor | Common Class B      
Common stock, par value (in dollars per share)   $ 0.01 $ 0.01
Common stock, shares authorized   10,000,000 10,000,000
Common stock, shares issued   344,859 344,859
Common stock, shares outstanding   344,859 344,859
Predecessor | Common Class C      
Common stock, par value (in dollars per share)   $ 0.01 $ 0.01
Common stock, shares authorized   10,000,000 10,000,000
Common stock, shares issued   209,882 209,882
Common stock, shares outstanding   209,882 209,882
Predecessor | Common Class E      
Common stock, par value (in dollars per share)   $ 0.01 $ 0.01
Common stock, shares authorized   10,000,000 10,000,000
Common stock, shares issued   504,276 504,276
Common stock, shares outstanding   504,276 504,276
Predecessor | Common Class F      
Common stock, par value (in dollars per share)   $ 0.01 $ 0.01
Common stock, shares authorized   1 1
Common stock, shares issued   1 1
Common stock, shares outstanding   1 1
Predecessor | Common Class G      
Common stock, par value (in dollars per share)   $ 0.01 $ 0.01
Common stock, shares authorized   3 3
Common stock, shares issued   2 2
Common stock, shares outstanding   2 2