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Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ (27,400)	$ 5,695	$ (21,473)	$ 6,716
Basic-weighted average shares outstanding (in shares)	28,542	28,276	28,506	28,228
Effect of dilutive potential securities (in shares)	0	1,061	0	969
Diluted- weighted average shares outstanding (in shares)	28,542	29,337	28,506	29,197
Basic (in dollars per share)	$ (0.96)	$ 0.20	$ (0.75)	$ 0.24
Diluted (in dollars per share)	$ (0.96)	$ 0.19	$ (0.75)	$ 0.23
Antidilutive securities excluded from computation of earnings per share (in shares)		800		600

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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