Stock-Based Compensation - Expenses Recorded Within Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	$ (1,139)	$ 3,553
2016 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	0	1,083
2017 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	0	1,195
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	(1,242)	1,275
Sign on RSU incentive
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	134	0
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total expenses	$ (30)	$ 0