Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share
Net income	$ 18,272	$ (1,390)	$ 10,556	$ 7,068	$ 16,882	$ 17,624
Weighted average common shares outstanding (in shares)	28,867		28,761		28,860	28,691
Weighted average common stock equivalents (in shares)	0		0		0	0
Total weighted average common shares outstanding and common stock equivalents (in shares)	28,867		28,761		28,860	28,691
Basic earnings (loss) per common share (in dollars per share)	$ 0.63		$ 0.37		$ 0.58	$ 0.61
Diluted earnings (loss) per common share (in dollars per share)	$ 0.63		$ 0.37		$ 0.58	$ 0.61
Dividend Payout ratio	33.30%		56.80%		72.40%	68.90%