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]
Shares not included in computation of diluted weighted average earnings per common (in shares)	200,000	0	0	2,000
Net income attributable to common shareholders	$ 4,540	$ 16,144	$ 7,995	$ 36,200
Basic weighted average common shares outstanding (in shares)	6,012,000	5,866,000	5,936,000	5,823,000
Potentially dilutive common shares (in shares)	86,000	195,000	175,000	197,000
Diluted weighted average common shares outstanding (in shares)	6,098,000	6,061,000	6,111,000	6,020,000
Basic weighted average earnings per common share (in dollars per share)	$ 0.76	$ 2.75	$ 1.35	$ 6.22
Diluted weighted average earnings per common share (in dollars per share)	$ 0.74	$ 2.66	$ 1.31	$ 6.01