Stockholders' Equity - Narrative (Details) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended
	Feb. 26, 2020 USD ($) $ / shares	Feb. 28, 2019 shares	Mar. 31, 2020 USD ($) stock_option_plan shares	Mar. 31, 2019 USD ($) shares
Shareholders Equity [Line Items]
Number of stock option plans | stock_option_plan			2
Common shares issued upon exercise of options (in shares)			100,000	1,500,000
Common stock repurchased | $			$ 275	$ 13,555
Chief Executive Officer
Shareholders Equity [Line Items]
Common stock repurchased | $	$ 300
Common stock repurchased, average price (in dollars per share) | $ / shares	$ 13.54
Common Stock
Shareholders Equity [Line Items]
Common shares issued upon exercise of options (in shares)			67,000	1,497,000
2012 Equity Incentive Award Plan
Shareholders Equity [Line Items]
Increase in shares authorized for grant (in shares)		4,600,000