Annual report pursuant to Section 13 and 15(d)

Stock-based and Long-Term Compensation - Schedule of Unvested Restricted Stock Awards and Restricted Stock Units (Details)

v3.8.0.1
Stock-based and Long-Term Compensation - Schedule of Unvested Restricted Stock Awards and Restricted Stock Units (Details) - Common Class A
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Restricted Stock  
Series A Restricted Stock Awards or Units  
Outstanding, Beginning of Period (in shares) | shares 116,986
Granted (in shares) | shares 12,755
Vested (in shares) | shares (87,544)
Canceled (in shares) | shares (6,724)
Outstanding, Ending in Period (in shares) | shares 35,473
WAFV  
Outstanding, Beginning of Period (in dollars per share) | $ / shares $ 26.70
Granted (in dollars per share) | $ / shares 11.76
Vested (in dollars per share) | $ / shares 28.13
Canceled (in dollars per share) | $ / shares 19.65
Outstanding, Ending of Period (in dollars per share) | $ / shares $ 19.13
Restricted Stock Units (RSUs)  
Series A Restricted Stock Awards or Units  
Outstanding, Beginning of Period (in shares) | shares 188,508
Granted (in shares) | shares 108,694
Vested (in shares) | shares (42,335)
Canceled (in shares) | shares (31,690)
Outstanding, Ending in Period (in shares) | shares 223,177
WAFV  
Outstanding, Beginning of Period (in dollars per share) | $ / shares $ 21.11
Granted (in dollars per share) | $ / shares 13.80
Vested (in dollars per share) | $ / shares 24.24
Canceled (in dollars per share) | $ / shares 14.20
Outstanding, Ending of Period (in dollars per share) | $ / shares $ 17.93