Net Income per Common Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator
Net income	$ 22,728	$ 248,009	$ 184,898
Denominator
Weighted average shares-basic (in shares)	11,090,064	12,989,951	12,399,509
Effect of dilutive securities:
Convertible bond debt (in shares)	3,292,316	3,195,901	3,052,352
Stock awards and options (in shares)	91,251	127,595	232,531
Dilutive potential common shares (in shares)	3,383,567	3,323,496	3,284,883
Weighted average shares - diluted (in shares)	14,473,631	16,313,447	15,684,392
Earnings Per Share
Basic net income per share (in dollars per share)	$ 2.05	$ 19.09	$ 14.91
Diluted net income per share (in dollars per share)	$ 1.96	$ 15.57	$ 11.79