Stockholders' Deficit - Share Repurchases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Class of Stock [Line Items]
Stock repurchased during period, value	$ 26,527	$ 12,015
2019 Repurchase Program
Class of Stock [Line Items]
Stock repurchased during period (in shares)	459,899
Stock repurchased during period, value	$ 26,500
Cumulative amount of shares repurchased (in shares)	1,697,597
Cumulative payments for repurchase of common stock	$ 129,800
Remaining dollar value of shares that may be repurchased	$ 70,200