Summary of Significant Accounting Policies - Weighted Average Number of Shares Outstanding Used to Compute Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Net income	$ 135,536	$ 29,174	$ 32,461
Weighted-average number of common shares outstanding
Basic weighted-average common shares outstanding (in shares)	11,879	11,676	11,518
Dilutive potential common shares (in shares)	372	256	274
Diluted weighted-average common shares outstanding (in shares)	12,251	11,932	11,792
Earnings per share
Basic (in dollars per share)	$ 11.41	$ 2.50	$ 2.82
Diluted (in dollars per share)	$ 11.06	$ 2.45	$ 2.75