Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share, [Line Items]
Net income	$ 32,079	$ 5,086
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Weighted average shares outstanding - basic	22,665	22,109
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted average shares outstanding - diluted	23,069	22,678
Earnings Per Share, Basic [Abstract]
Earnings per share - basic	$ 1.42	$ 0.23
Earnings Per Share, Diluted [Abstract]
Earnings per share - diluted	$ 1.39	$ 0.22
Stock option [Member]
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Dilutive effect of shares issued under stock compensation arrangements	343	508
Restricted stock [Member]
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Dilutive effect of shares issued under stock compensation arrangements	61	61