Earnings Per Share - Summary of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Basic weighted average number of shares outstanding		12,640,463	12,976,235	12,768,096	12,998,168
Net dilutive effect of share-based awards, treasury method	[1]	484,192	885,518	501,398	859,448
Diluted weighted average number of shares outstanding		13,124,655	13,861,753	13,269,494	13,857,616
Net Income (Loss) Attributable to Parent		$ 17,649	$ 12,375	$ 25,467	$ 23,569
Diluted		$ 1.40	$ 0.95	$ 1.99	$ 1.81
Net loss per share (in dollars per share)		$ 1.34	$ 0.89	$ 1.92	$ 1.70

[1] For both the three and six months ended June 30, 2020, the diluted earnings per share computation does not include the anti-dilutive effect of 10,770 shares of Class A Stock granted under share-based compensation arrangements (7,628 shares for both the three and six months ended June 30, 2019).