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Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 6,731	$ (164)	$ 11,823	$ 4,639	$ 6,567	$ 16,462
Weighted average common shares	47,756,326		48,239,928		47,560,847	48,138,125
Stock-based awards	688,548		178,450		883,811	326,952
Weighted average common shares assuming dilution	48,444,874		48,418,378		48,444,658	48,465,077
Earnings (Loss) Per Share, Basic and Diluted [Abstract]
Basic earnings per share	$ 0.14		$ 0.25		$ 0.14	$ 0.34
Diluted earnings per share	$ 0.14		$ 0.24		$ 0.14	$ 0.34
Anti-dilutive shares excluded from calculations of diluted earnings per share	907,210		1,484,976		1,032,655	1,329,519

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