Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 6,850	$ 6,970	$ (14,623)	$ 13,686
Basic-weighted average shares outstanding (in shares)	28,583	28,353	28,529	28,280
Effect of dilutive potential securities (in shares)	843	1,439	0	1,074
Diluted- weighted average shares outstanding (in shares)	29,426	29,792	28,529	29,354
Basic (in dollars per share)	$ 0.24	$ 0.25	$ (0.51)	$ 0.48
Diluted (in dollars per share)	$ 0.23	$ 0.23	$ (0.51)	$ 0.47
Antidilutive securities excluded from computation of earnings per share (in shares)	1,600	800	0	700
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities		200