Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE - value at Dec. 31, 2019	$ 279,399	$ 6	$ 302,189	$ (23,091)	$ 295
BALANCE - shares at Dec. 31, 2019		64,283
Share-based compensation, value	3,130		3,130
Share-based compensation, shares		61
Vesting of restricted stock units and impact of shares withheld for taxes, value	(2,106)		(2,106)
Vesting of restricted stock units and impact of shares withheld for taxes, shares		412
Exercise of stock options and purchases from employee stock purchase plan, value	1,318		1,318
Exercise of stock options and purchases from employee stock purchase plan, shares		191
Net income	42,947			42,947
Other comprehensive income (loss)—net of tax	(3,686)				(3,686)
BALANCE - value at Jun. 30, 2020	321,002	$ 6	304,531	19,856	(3,391)
BALANCE - shares at Jun. 30, 2020		64,947
BALANCE - value at Mar. 31, 2020	306,629	$ 6	302,558	10,896	(6,831)
BALANCE - shares at Mar. 31, 2020		64,795
Share-based compensation, value	1,455		1,455
Share-based compensation, shares		22
Vesting of restricted stock units and impact of shares withheld for taxes, value	(178)		(178)
Vesting of restricted stock units and impact of shares withheld for taxes, shares		24
Exercise of stock options and purchases from employee stock purchase plan, value	696		696
Exercise of stock options and purchases from employee stock purchase plan, shares		106
Net income	8,960			8,960
Other comprehensive income (loss)—net of tax	3,440				3,440
BALANCE - value at Jun. 30, 2020	321,002	$ 6	304,531	19,856	(3,391)
BALANCE - shares at Jun. 30, 2020		64,947
BALANCE - value at Dec. 31, 2020	346,668	$ 6	304,757	40,937	968
BALANCE - shares at Dec. 31, 2020		65,023
Share-based compensation, value	2,564		2,564
Share-based compensation, shares		73
Vesting of restricted stock units and impact of shares withheld for taxes, value	(3,784)		(3,784)
Vesting of restricted stock units and impact of shares withheld for taxes, shares		410
Exercise of stock options and purchases from employee stock purchase plan, value	1,440		1,440
Exercise of stock options and purchases from employee stock purchase plan, shares		148
Net income	10,919			10,919
Other comprehensive income (loss)—net of tax	2,290				2,290
BALANCE - value at Jun. 30, 2021	360,097	$ 6	304,977	51,856	3,258
BALANCE - shares at Jun. 30, 2021		65,654
BALANCE - value at Mar. 31, 2021	356,610	$ 6	303,999	49,751	2,854
BALANCE - shares at Mar. 31, 2021		65,620
Share-based compensation, value	798		798
Share-based compensation, shares		12
Exercise of stock options and purchases from employee stock purchase plan, value	180		180
Exercise of stock options and purchases from employee stock purchase plan, shares		22
Net income	2,105			2,105
Other comprehensive income (loss)—net of tax	404				404
BALANCE - value at Jun. 30, 2021	$ 360,097	$ 6	$ 304,977	$ 51,856	$ 3,258
BALANCE - shares at Jun. 30, 2021		65,654