Quarterly report pursuant to Section 13 or 15(d)

Equity - Summary of Unvested Shares of Restricted Common Stock (Details)

v3.8.0.1
Equity - Summary of Unvested Shares of Restricted Common Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Restricted Shares of Common Stock [Member]    
Shares    
Beginning Balance (in shares) 1,399,593 1,181,672
Granted (in shares) 49,620 452,864
Vested (in shares) (256,618) (230,424)
Forfeited (in shares) (79,655) (4,519)
Ending Balance (in shares) 1,112,940 1,399,593
Weighted Average Share Price    
Beginning Balance (in usd per share) $ 18.73 $ 17.76
Granted (in usd per share) 18.68 19.06
Vested (in usd per share) 18.92 14.41
Forfeited (in usd per share) 18.97 18.72
Ending Balance (in usd per share) $ 18.66 $ 18.73
Value    
Beginning Balance $ 26.2 $ 21.0
Granted 0.9 8.6
Vested (4.8) (3.3)
Forfeited (1.5) (0.1)
Ending Balance $ 20.8 $ 26.2
Restricted Stock Units [Member]    
Shares    
Beginning Balance (in shares) 255,706 0
Granted (in shares) 0 257,284
Vested (in shares) (868) (376)
Forfeited (in shares) (14,654) (1,202)
Ending Balance (in shares) 240,184 255,706
Weighted Average Share Price    
Beginning Balance (in usd per share) $ 18.99 $ 0.00
Granted (in usd per share) 0.00 18.99
Vested (in usd per share) 18.99 18.99
Forfeited (in usd per share) 18.99 18.99
Ending Balance (in usd per share) $ 18.99 $ 18.99
Value    
Beginning Balance $ 4.9 $ 0.0
Granted 0.0 4.9
Vested 0.0 0.0
Forfeited (0.3) 0.0
Ending Balance $ 4.6 $ 4.9