Note 13 - Earnings Per Share - Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Net income (loss)		$ 4,744	$ (80,831)
Participating share-based earnings (a)	[1]
Basic and diluted net income attributable to common stockholders		$ 4,744
Basic weighted average shares outstanding (in shares)		92,592
Dilution attributable to stock-based compensation awards (in shares)		2,890
Diluted weighted average shares outstanding (in shares)		95,482

[1] Participating earnings represent the distributed and undistributed earnings of the Company attributable to the participating securities. Unexercised stock option awards do not participate in undistributed net losses as they are not contractually obligated to do so.