Debt and Credit Facilities - Additional Information (Details)			1 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2022 USD ($)	Jul. 01, 2014 USD ($)	Jul. 31, 2021 USD ($)	Jun. 30, 2021 USD ($) Extension	Aug. 31, 2020 USD ($) d	Jun. 30, 2022 USD ($) $ / shares	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) d $ / shares shares	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jan. 01, 2021 USD ($)	Aug. 10, 2020 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding amount						$ 229,600,000		$ 229,600,000			$ 223,000,000.0
Deferred tax liabilities						9,587,000		9,587,000			11,400,000
Deferred tax assets						134,591,000		134,591,000			134,393,000
Level 2
Debt Instrument [Line Items]
Senior notes, fair value						211,300,000		211,300,000
Senior Notes
Debt Instrument [Line Items]
Debt instrument, outstanding amount						200,000,000		200,000,000			200,000,000
Senior Note, Series A
Debt Instrument [Line Items]
Senior note, amount paid			$ 50,000,000
Convertible Senior Notes
Debt Instrument [Line Items]
Interest rate					0.25%
Interest expense						700,000	$ 700,000	$ 1,500,000	$ 1,500,000	$ 4,400,000
Debt amount					$ 400,000,000.0
Exercise of option by initial purchasers aggregate principal amount					50,000,000.0
Proceeds from issuance and sale of debt					389,700,000
Transaction fees and other third-party offering expenses					$ 10,300,000
Debt instrument, payment terms								The Convertible Senior Notes accrue interest at a rate of 0.25% per annum, payable semi-annually on February 15 and August 15 of each year beginning on February 15, 2021
Debt instrument, frequency of periodic payment								semi-annually
Maturity Date					Aug. 15, 2025
Convertible note converted each amount						$ 1,000		$ 1,000
Convertible notes converted each into shares of common stock | shares								22.2913
Debt Instrument, conversion price | $ / shares						$ 44.86		$ 44.86
Threshold trading days | d					20			51
Threshold consecutive trading days | d					30
Conversion percentage of stock price trigger					130.00%
Number of business day period					5 days
Consecutive trading day period					5 days
Convertible principal amount					$ 1,000
Measurement period, percentage					98.00%
Percentage of principal amount to redeem convertible senior notes					100.00%
Percentage of convertible senior notes repurchased at cash					100.00%
Debt liability					$ 336,100,000
Debt instrument convertible notes additional paid in capital					$ 53,600,000
Convertible senior notes effective interest rate					3.25%
Net carrying value of notes						$ 400,000,000.0		$ 400,000,000.0		$ 340,600,000	400,000,000.0
Bond hedge term								5 years
Number of shares issuable upon conversion | shares								8,900,000
Cost of convertible note hedge transaction								$ 55,000,000.0
Number of common stock acquired by offsetting sale warrants. | shares								8,900,000
Exercise price of warrants | $ / shares						$ 66.46		$ 66.46
Cash proceeds from sales of warrants								$ 13,800,000
Convertible Senior Notes | ASU 2020-06
Debt Instrument [Line Items]
Reclassification of equity component of convertible senior notes to liabilities												$ 55,000,000.0
Reclassification of equity component of debt issuance costs to liabilities												$ 1,400,000
Carrying amount of convertible senior notes adjusted in retained earnings													$ 3,700,000
Convertible Note Hedge And Warrant Transaction
Debt Instrument [Line Items]
Purchase of bond hedges and sale of warrants						$ 41,200,000		41,200,000
Deferred tax liabilities						16,200,000		16,200,000
Deferred tax assets						16,500,000		16,500,000
Convertible Note Hedge And Warrant Transaction | ASU 2020-06
Debt Instrument [Line Items]
Deferred tax liability reversed						13,900,000		13,900,000
Additional deferred tax liability related to capitalized debt issuance costs						400,000		400,000
Adjustment to deferred tax asset through retained earnings						900,000		900,000
Private Placement
Debt Instrument [Line Items]
Debt issuance costs incurred		$ 1,100,000												$ 500,000
Debt amount		250,000,000.0
Interest payments						5,100,000	6,200,000	5,100,000	6,200,000
Private Placement | Accrued Expenses and Other Current Liabilities
Debt Instrument [Line Items]
Interest payable						4,700,000		4,700,000			$ 4,700,000
Private Placement | Senior Notes
Debt Instrument [Line Items]
Interest expense						$ 2,600,000	3,200,000	$ 5,200,000	6,300,000
Private Placement | Senior Note, Series A
Debt Instrument [Line Items]
Debt amount		$ 50,000,000
Maturity Date		Jul. 15, 2021
Xator Corporation
Debt Instrument [Line Items]
Borrowed under credit agreement to partially fund the acquisition	$ 300,000,000
Minimum [Member] | Convertible Senior Notes
Debt Instrument [Line Items]
Debt Instrument, conversion price | $ / shares						$ 44.86		$ 44.86
Percentage of bond hedge and warrant transactions increased conversion price								35.00%
Maximum | Convertible Senior Notes
Debt Instrument [Line Items]
Debt Instrument, conversion price | $ / shares						$ 66.46		$ 66.46
Percentage of bond hedge and warrant transactions increased conversion price								100.00%
Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Credit agreement date				Jun. 30, 2021
Revolving credit facility				$ 650,000,000			650,000,000		650,000,000
Debt issuance costs incurred				1,900,000			1,900,000		1,900,000
Revolving credit facility				$ 550,000,000			550,000,000		550,000,000
Credit agreement maturity period				5 years
Credit agreement number of extensions | Extension				2
Interest rate						3.22%		3.22%			1.36%
Letters of credit outstanding amount						$ 44,500,000		$ 44,500,000			$ 44,300,000
Interest expense						800,000	$ 300,000	900,000	$ 500,000
Debt instrument, outstanding amount						$ 200,000,000.0		$ 200,000,000.0
Unsecured Revolving Credit Facility | Xator Corporation
Debt Instrument [Line Items]
Borrowed under credit agreement to partially fund the acquisition	$ 300,000,000.0
Unsecured Revolving Credit Facility | Base Rate | Minimum [Member]
Debt Instrument [Line Items]
Margin interest rate									0.00%
Unsecured Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Margin interest rate									0.625%
Unsecured Revolving Credit Facility | Euro Currency Rate | Minimum [Member]
Debt Instrument [Line Items]
Margin interest rate									1.00%
Unsecured Revolving Credit Facility | Euro Currency Rate | Maximum
Debt Instrument [Line Items]
Margin interest rate									1.625%