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Debt and Credit Facilities - Additional Information (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
May 31, 2022
USD ($)
Jul. 01, 2014
USD ($)
Sep. 30, 2022
USD ($)
$ / shares
Jul. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Extension
Aug. 31, 2020
USD ($)
d
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
d
$ / shares
shares
Sep. 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     $ 239,800,000       $ 239,800,000     $ 239,800,000     $ 223,000,000.0      
Deferred tax liabilities     10,409,000       10,409,000     10,409,000     11,400,000      
Deferred tax assets     139,890,000       139,890,000     139,890,000     134,393,000      
Level 2                                
Debt Instrument [Line Items]                                
Senior notes, fair value     203,500,000       203,500,000     203,500,000            
Senior Notes                                
Debt Instrument [Line Items]                                
Debt instrument, outstanding amount     200,000,000       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]                                
Debt amount           $ 400,000,000.0                    
Interest rate           0.25%                    
Interest expense             700,000 $ 700,000   $ 2,200,000 $ 2,200,000 $ 4,400,000        
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     $ 1,000            
Convertible notes converted each into shares of common stock | shares                   22.2913            
Debt Instrument, conversion price | $ / shares     $ 44.86       $ 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     $ 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     $ 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     41,200,000            
Deferred tax liabilities     16,200,000       16,200,000     16,200,000            
Deferred tax assets     16,500,000       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     13,900,000            
Additional deferred tax liability related to capitalized debt issuance costs     400,000       400,000     400,000            
Adjustment to deferred tax asset through retained earnings     900,000       900,000     900,000            
Private Placement                                
Debt Instrument [Line Items]                                
Debt amount   $ 250,000,000.0                            
Debt issuance costs incurred   1,100,000                           $ 500,000
Interest payments             5,100,000 6,200,000   10,200,000 12,400,000          
Private Placement | Accrued Expenses and Other Current Liabilities                                
Debt Instrument [Line Items]                                
Interest payable     $ 2,200,000       2,200,000     2,200,000     $ 4,700,000      
Private Placement | Senior Notes                                
Debt Instrument [Line Items]                                
Interest expense             $ 2,600,000 2,700,000   $ 7,800,000 8,900,000          
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 | Convertible Senior Notes                                
Debt Instrument [Line Items]                                
Debt Instrument, conversion price | $ / shares     $ 44.86       $ 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     $ 66.46            
Percentage of bond hedge and warrant transactions increased conversion price                   100.00%            
2022 Delayed Draw Term Loan                                
Debt Instrument [Line Items]                                
Debt issuance date     Sep. 30, 2022                          
Debt amount     $ 350,000,000       $ 350,000,000     $ 350,000,000            
Debt issuance costs incurred     900,000       900,000     900,000            
Debt instrument, outstanding amount     $ 0       $ 0     $ 0            
Debt instrument, maturity period     3 years                          
Unused term loan commitments rate     0.175%                          
2022 Delayed Draw Term Loan | Maximum                                
Debt Instrument [Line Items]                                
Increase in term loan     $ 150,000,000                          
2022 Delayed Draw Term Loan | Base Rate | Minimum                                
Debt Instrument [Line Items]                                
Margin interest rate     0.00%                          
2022 Delayed Draw Term Loan | Base Rate | Maximum                                
Debt Instrument [Line Items]                                
Margin interest rate     0.50%                          
2022 Delayed Draw Term Loan | SOFR Benchmark Rate | Minimum                                
Debt Instrument [Line Items]                                
Margin interest rate     0.875%                          
2022 Delayed Draw Term Loan | SOFR Benchmark Rate | Maximum                                
Debt Instrument [Line Items]                                
Margin interest rate     1.50%                          
Unsecured Revolving Credit Facility                                
Debt Instrument [Line Items]                                
Credit agreement date         Jun. 30, 2021                      
Revolving credit facility         $ 650,000,000       $ 650,000,000              
Debt issuance costs incurred         1,900,000       1,900,000              
Revolving credit facility         $ 550,000,000       $ 550,000,000              
Credit agreement maturity period         5 years                      
Credit agreement number of extensions | Extension         2                      
Interest rate     4.46%       4.46%     4.46%     1.36%      
Letters of credit outstanding amount     $ 44,500,000       $ 44,500,000     $ 44,500,000     $ 44,300,000      
Interest expense             2,500,000 $ 100,000   3,400,000 $ 600,000          
Debt instrument, outstanding amount     $ 101,200,000       $ 101,200,000     $ 101,200,000            
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                                
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 | SOFR Benchmark Rate | Minimum                                
Debt Instrument [Line Items]                                
Margin interest rate                 1.00%              
Unsecured Revolving Credit Facility | SOFR Benchmark Rate | Maximum                                
Debt Instrument [Line Items]                                
Margin interest rate                 1.625%