Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2019		11,572,668
Beginning balance at Dec. 31, 2019	$ 292,800	$ 116	$ 88,399	$ 212,553	$ (8,268)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,174			29,174
Other comprehensive income (loss), net of tax	(1,332)				(1,332)
Employee stock purchase plan (in shares)		57,285
Employee stock purchase plan	2,194	$ 1	2,193
Stock options exercised (in shares)		54,063
Stock options exercised	1,564	$ 1	1,563
Stock repurchased related to the exercise of stock options and stock awards vested (in shares)		(95,411)
Stock repurchased related to the exercise of stock options and stock awards vested	(4,365)	$ (2)	(4,363)
Stock awards vested (in shares)		139,607
Stock awards vested	0	$ 1	(1)
Stock-based compensation	9,299		9,299
Ending balance (in shares) at Dec. 31, 2020		11,728,212
Ending balance at Dec. 31, 2020	329,334	$ 117	97,090	241,727	(9,600)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	135,536			135,536
Other comprehensive income (loss), net of tax	2,567				2,567
Employee stock purchase plan (in shares)		56,524
Employee stock purchase plan	2,904	$ 1	2,903
Stock options exercised (in shares)		48,769
Stock options exercised	1,733	$ 1	1,732
Stock repurchased related to the exercise of stock options and stock awards vested (in shares)		(155,653)
Stock repurchased related to the exercise of stock options and stock awards vested	(8,684)	$ (2)	(8,682)
Stock awards vested (in shares)		247,235
Stock awards vested	0	$ 2	(2)
Stock-based compensation	$ 11,212		11,212
Ending balance (in shares) at Dec. 31, 2021	11,925,087	11,925,087
Ending balance at Dec. 31, 2021	$ 474,602	$ 119	104,253	377,263	(7,033)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,789			28,789
Other comprehensive income (loss), net of tax	14,778				14,778
Employee stock purchase plan (in shares)		59,693
Employee stock purchase plan	$ 2,231	$ 1	2,230
Stock options exercised (in shares)	109,186	109,186
Stock options exercised	$ 3,475	$ 1	3,474
Stock repurchased related to the exercise of stock options and stock awards vested (in shares)		(151,213)
Stock repurchased related to the exercise of stock options and stock awards vested	(7,459)	$ (2)	(7,457)
Stock awards vested (in shares)		163,532
Stock awards vested	0	$ 2	(2)
Stock-based compensation	$ 9,544		9,544
Ending balance (in shares) at Dec. 31, 2022	12,106,285	12,106,285
Ending balance at Dec. 31, 2022	$ 525,960	$ 121	$ 112,042	$ 406,052	$ 7,745