Stock Based Compensation - Performance-based and Market-based Awards (Details) - Market Based Options - $ / shares	1 Months Ended
	Aug. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, share price (in dollars per share)	$ 15.00	$ 15.00
Fully Vest On January 1, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	397,693	642,307
Stock options granted (in dollars per share)	$ 7.50	$ 7.50