CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Balance at Dec. 31, 2020	$ 1,529,150	$ 548	$ 1,460,748	$ 2,085	$ 65,769
Beginning Balance (in shares) at Dec. 31, 2020		54,760,837
Net income	29,450				29,450
Issuance of common stock for debt conversion	1	$ 0	1
Issuance of common stock for debt conversion (in shares)		3
Exercise of stock options and vesting of stock units	508	$ 1	507
Exercise of stock options and vesting of stock units (in shares)		138,405
True-up of costs related to the December 2020 issuance of common stock	145
Stock-based compensation expense	6,541		6,541
Stock Issued During Period, Value, Acquisitions	145
Balance at Mar. 31, 2021	1,556,216	$ 549	1,467,942	(7,494)	95,219
Ending Balance (in shares) at Mar. 31, 2021		54,899,245
Translation adjustment	(9,579)			(9,579)
Balance at Dec. 31, 2021	1,750,067	$ 553	1,572,340	(16,886)	194,060
Balance (Accounting Standards Update 2020-06 [Member]) at Dec. 31, 2021	(21,817)		(39,070)		17,253
Beginning Balance (in shares) at Dec. 31, 2021		55,321,457
Net income	46,964				46,964
Issuance of common stock for debt conversion	(2)	$ 0	(2)
Issuance of common stock for debt conversion (in shares)		8
Exercise of stock options and vesting of stock units	297	$ 2	295
Exercise of stock options and vesting of stock units (in shares)		170,990
Tax withholding on vesting of restricted stock units	(12,311)	$ (1)	12,310
Tax withholding on vesting of restricted stock units (in shares)		63,409
Stock-based compensation expense	7,915		7,915
Other	(24)
Balance at Mar. 31, 2022	1,766,401	$ 554	$ 1,529,144	(21,574)	$ 258,277
Ending Balance (in shares) at Mar. 31, 2022		55,429,046
Translation adjustment	$ (4,688)			$ (4,688)