Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Stockholders' Equity Note [Abstract]
Common stock, shares authorized (in shares)	150,000,000		150,000,000
Common stock, shares issued (in shares)	89,777,896		89,777,896		88,161,638
Common stock, shares outstanding (in shares)	84,763,882		84,763,882		83,148,458
Preference shares issued (in shares)	18,600,000		18,600,000
Undesignated shares (in shares)	41,622,104		41,622,104
Shares repurchased for tax withholding (in shares)			834		23,220
Shares repurchased for tax withholding, price per share (in dollars per share)			$ 1.13		$ 0.78
Stock repurchase program, remaining authorized repurchase amount	$ 74,245		$ 74,245		$ 74,245
Treasury shares repurchased (in shares)	0	0	0	0