Stock Based Compensation - Performance-based and Market-based Awards (Details) - $ / shares	1 Months Ended
	Aug. 31, 2018	Apr. 30, 2018	Dec. 31, 2017
Market Based Options
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 | Market Based Options
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
Vest Annually On December 31 for One Fifth of Each Tranche | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	0	115,950
Stock options granted (in dollars per share)	$ 7.50	$ 7.50