Common Stock and Share-Based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) $ / shares shares
Options
Options outstanding at beginning of period (shares) | shares	385,538
Forfeited and canceled (shares) | shares	(197,813)
Options outstanding at end of period (shares) | shares	187,725
Weighted Average Exercise Price
Options outstanding at beginning of period (USD per share) | $ / shares	$ 14.55
Forfeited and canceled (USD per share) | $ / shares	17.36
Options outstanding at end of period (USD per share) | $ / shares	$ 11.58
Options outstanding and exercisable at end of period - Weighted average contractual life	1 year 3 months
Options outstanding and exercisable at end of period - Aggregate intrinsic value | $	$ 0.0