Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative effect of a change in accounting principle related to convertible debt	Common Stock	Treasury Stock	Additional Paid-In Capital	Additional Paid-In Capital Cumulative effect of a change in accounting principle related to convertible debt	Accumulated Earnings	Accumulated Earnings Cumulative effect of a change in accounting principle related to convertible debt	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period (in shares) at Dec. 31, 2020			52,677,000
Balance at beginning of period at Dec. 31, 2020	$ 967,503		$ 53	$ (238,109)	$ 920,359		$ 290,722		$ (5,522)
Balance at beginning of period, Treasury stock (in shares) at Dec. 31, 2020				(9,894,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,127						14,127
Other comprehensive income (loss)	(621)								(621)
Share-based compensation	11,772				11,772
Issuance of common stock under employee stock plans (in shares)			388,000
Issuance of common stock under employee stock plans	20,826				20,826
Tax payments related to restricted stock units	(2,596)				(2,596)
Balance at end of period (in shares) at Mar. 31, 2021			53,065,000
Balance at end of period at Mar. 31, 2021	1,011,011		$ 53	$ (238,109)	950,361		304,849		(6,143)
Balance at end of period, Treasury stock (in shares) at Mar. 31, 2021				(9,894,000)
Balance at beginning of period (in shares) at Dec. 31, 2020			52,677,000
Balance at beginning of period at Dec. 31, 2020	967,503		$ 53	$ (238,109)	920,359		290,722		(5,522)
Balance at beginning of period, Treasury stock (in shares) at Dec. 31, 2020				(9,894,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	63,868
Other comprehensive income (loss)	(2,268)
Balance at end of period (in shares) at Sep. 30, 2021			53,763,000
Balance at end of period at Sep. 30, 2021	1,111,336		$ 54	$ (238,109)	1,002,591		354,590		(7,790)
Balance at end of period, Treasury stock (in shares) at Sep. 30, 2021				(9,894,000)
Balance at beginning of period (in shares) at Dec. 31, 2020			52,677,000
Balance at beginning of period at Dec. 31, 2020	$ 967,503		$ 53	$ (238,109)	920,359		290,722		(5,522)
Balance at beginning of period, Treasury stock (in shares) at Dec. 31, 2020				(9,894,000)
Balance at end of period (in shares) at Dec. 31, 2021	44,179,000		54,073,000
Balance at end of period at Dec. 31, 2021	$ 1,146,689	$ (56,233)	$ 54	$ (238,109)	1,024,580	$ (72,742)	368,571	$ 16,509	(8,407)
Balance at end of period, Treasury stock (in shares) at Dec. 31, 2021	(9,894,000)			(9,894,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06 [Member]
Balance at beginning of period (in shares) at Mar. 31, 2021			53,065,000
Balance at beginning of period at Mar. 31, 2021	$ 1,011,011		$ 53	$ (238,109)	950,361		304,849		(6,143)
Balance at beginning of period, Treasury stock (in shares) at Mar. 31, 2021				(9,894,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,424						20,424
Other comprehensive income (loss)	652								652
Share-based compensation	13,039				13,039
Issuance of common stock under employee stock plans (in shares)			265,000
Issuance of common stock under employee stock plans	11,517				11,517
Tax payments related to restricted stock units	(4,071)				(4,071)
Balance at end of period (in shares) at Jun. 30, 2021			53,330,000
Balance at end of period at Jun. 30, 2021	1,052,572		$ 53	$ (238,109)	970,846		325,273		(5,491)
Balance at end of period, Treasury stock (in shares) at Jun. 30, 2021				(9,894,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,317						29,317
Other comprehensive income (loss)	(2,299)								(2,299)
Share-based compensation	13,666				13,666
Issuance of common stock under employee stock plans (in shares)			433,000
Issuance of common stock under employee stock plans	21,574		$ 1		21,573
Tax payments related to restricted stock units	(3,494)				(3,494)
Balance at end of period (in shares) at Sep. 30, 2021			53,763,000
Balance at end of period at Sep. 30, 2021	$ 1,111,336		$ 54	$ (238,109)	1,002,591		354,590		(7,790)
Balance at end of period, Treasury stock (in shares) at Sep. 30, 2021				(9,894,000)
Balance at beginning of period (in shares) at Dec. 31, 2021	44,179,000		54,073,000
Balance at beginning of period at Dec. 31, 2021	$ 1,146,689	(56,233)	$ 54	$ (238,109)	1,024,580	(72,742)	368,571	16,509	(8,407)
Balance at beginning of period, Treasury stock (in shares) at Dec. 31, 2021	(9,894,000)			(9,894,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 8,213						8,213
Other comprehensive income (loss)	(2,555)								(2,555)
Share-based compensation	16,208				16,208
Issuance of common stock under employee stock plans (in shares)			384,000
Issuance of common stock under employee stock plans	18,951				18,951
Tax payments related to restricted stock units	(4,322)				(4,322)
Stock repurchases (in shares)				(389,000)
Stock repurchases	(52,210)			$ (52,210)
Balance at end of period (in shares) at Mar. 31, 2022			54,457,000
Balance at end of period at Mar. 31, 2022	$ 1,074,741		$ 54	$ (290,319)	982,675		393,293		(10,962)
Balance at end of period, Treasury stock (in shares) at Mar. 31, 2022				(10,283,000)
Balance at beginning of period (in shares) at Dec. 31, 2021	44,179,000		54,073,000
Balance at beginning of period at Dec. 31, 2021	$ 1,146,689	$ (56,233)	$ 54	$ (238,109)	1,024,580	$ (72,742)	368,571	$ 16,509	(8,407)
Balance at beginning of period, Treasury stock (in shares) at Dec. 31, 2021	(9,894,000)			(9,894,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 34,056
Other comprehensive income (loss)	$ (15,735)
Balance at end of period (in shares) at Sep. 30, 2022	44,646,000		54,929,000
Balance at end of period at Sep. 30, 2022	$ 1,135,395		$ 55	$ (290,319)	1,030,665		419,136		(24,142)
Balance at end of period, Treasury stock (in shares) at Sep. 30, 2022	(10,283,000)			(10,283,000)
Balance at beginning of period (in shares) at Mar. 31, 2022			54,457,000
Balance at beginning of period at Mar. 31, 2022	$ 1,074,741		$ 54	$ (290,319)	982,675		393,293		(10,962)
Balance at beginning of period, Treasury stock (in shares) at Mar. 31, 2022				(10,283,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	9,069						9,069
Other comprehensive income (loss)	(6,410)								(6,410)
Share-based compensation	17,213				17,213
Issuance of common stock under employee stock plans (in shares)			114,000
Issuance of common stock under employee stock plans	2,172		$ 1		2,171
Tax payments related to restricted stock units	(4,148)				(4,148)
Balance at end of period (in shares) at Jun. 30, 2022			54,571,000
Balance at end of period at Jun. 30, 2022	1,092,637		$ 55	$ (290,319)	997,911		402,362		(17,372)
Balance at end of period, Treasury stock (in shares) at Jun. 30, 2022				(10,283,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	16,774						16,774
Other comprehensive income (loss)	(6,770)								(6,770)
Share-based compensation	17,310				17,310
Issuance of common stock under employee stock plans (in shares)			358,000
Issuance of common stock under employee stock plans	18,416				18,416
Tax payments related to restricted stock units	$ (2,972)				(2,972)
Balance at end of period (in shares) at Sep. 30, 2022	44,646,000		54,929,000
Balance at end of period at Sep. 30, 2022	$ 1,135,395		$ 55	$ (290,319)	$ 1,030,665		$ 419,136		$ (24,142)
Balance at end of period, Treasury stock (in shares) at Sep. 30, 2022	(10,283,000)			(10,283,000)