Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share
Net income	$ 25,413	$ 19,258	$ 19,039	$ 14,331	$ 18,272	$ (1,390)	$ 63,710	$ 31,213
Total weighted average common shares outstanding and common stock equivalents (in shares)	31,567			28,874			31,616	28,865
Basic earnings per common share (in dollars per share)	$ 0.81			$ 0.50			$ 2.02	$ 1.08
Diluted earnings per common share (in dollars per share)	$ 0.81			$ 0.50			$ 2.02	$ 1.08
Dividend payout ratio	25.90%			42.00%			31.20%	58.30%