Stockholders' Equity - Share Repurchase Program (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) shares	Feb. 20, 2019 USD ($) director
Equity [Abstract]
Authorized amount under share repurchase program		$ 100,000,000
Number of directors to authorized repurchases | director		3
Repurchased shares (in shares) | shares	48,002
Reduction in stockholders' equity	$ 4,200,000