Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 12,445	$ 1,501	$ (46,768)	$ 48,043	$ 13,946	$ 1,275
Less: Net income applicable to contingently issuable shares	0		0		0	798
Net income (loss) on which diluted earnings (loss) per share is calculated	$ 12,445		$ (46,768)		$ 13,946	$ 477
Basic weighted average outstanding shares of common stock (in shares)	93,617,000		78,317,000		93,452,000	78,161,000
Dilutive effect of stock-based awards for common stock (in shares)	1,051,000		0		930,000	804,000
Dilutive effect of contingent earnout shares before conversion (in shares)	0		0		0	114,000
Diluted weighted average outstanding shares of common stock (in shares)	94,668,000		78,317,000		94,382,000	79,079,000
Earnings (loss) per share - basic (in usd per share)	$ 0.13		$ (0.60)		$ 0.15	$ 0.02
Earnings (loss) per share - diluted (in usd per share)	$ 0.13		$ (0.60)		$ 0.15	$ 0.01
Anti-dilutive options excluded from calculation of diluted EPS (in shares)	4,803,239		29,315,249		5,078,745	28,137,215