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Financing Arrangements (Details)
$ / shares in Units, shares in Thousands
 3 Months Ended 9 Months Ended
Jan. 21, 2021
USD ($)
Nov. 24, 2020
USD ($)
$ / shares
Apr. 12, 2017
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
shares
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
shares
Jan. 01, 2022
USD ($)
Dec. 31, 2021
USD ($)
Apr. 01, 2021
shares
Jan. 22, 2021
USD ($)
Oct. 22, 2020
shares
Line of Credit Facility [Line Items]                          
Long-term debt       $ 140,780,000     $ 140,780,000     $ 111,289,000      
Amortization of Debt Discount (Premium)             $ 0 $ 10,535,000          
Payments for Repurchase of Equity, Prepaid Forward     $ 78,000,000                    
Treasury Shares Acquired, Estimated, Prepaid Forward | shares           9,200   9,200          
Operating Lease, Impairment Loss               $ 12,500,000          
Own-share Lending Arrangement, Shares, Issued | shares     9,200                    
SharesPurchasedUnderPrepaidForward | shares                     400   8,800
Debt Instrument, Covenant Compliance, Asset Coverage Ratio       1.50     1.50            
Adjustments to Additional Paid in Capital, Capped Call Option, Issuance Costs   $ (10,200,000)                      
Option Indexed To Issuers Equity, cap price   12.0925                      
Payments to repurchase convertible debt   50,000,000                      
Interest Paid, Including Capitalized Interest, Operating and Investing Activities   200,000                      
Letters of Credit Outstanding, Amount       $ 5.2     $ 5.2            
Debt Instrument, Periodic Payment, Interest         $ 2,200,000                
Convertible Senior Notes due 2022 [Member]                          
Line of Credit Facility [Line Items]                          
Debt Instrument, Unamortized Discount       0     0            
Convertible Debt Principal Amount Conversion       0     0     125,000,000      
Amortization of Debt Issuance Costs       0     200,000            
Amortization of Debt Discount (Premium)       $ 0     0            
Repayments of Debt         $ 125,000,000                
Convertible Senior Notes due 2025 [Member] | Private Placement [Member]                          
Line of Credit Facility [Line Items]                          
Debt Instrument   $ 125,000,000                      
2021 Credit Facility [Member]                          
Line of Credit Facility [Line Items]                          
Credit agreement, current borrowing capacity                       $ 50,000,000  
Minimum Fixed Charge Coverage Ratio, minimum balance $ 10,000,000                        
Line of Credit Facility, Unused Capacity, Minimum Liquidity Requirement, Amount 55,000,000                        
Line of Credit Facility, Unused Capacity, Qualified Cash $ 40,000,000                        
Convertible Senior Notes due 2022 [Member]                          
Line of Credit Facility [Line Items]                          
Debt Instrument     $ 175,000,000                    
Long-term Debt, Percentage Bearing Fixed Interest, Amount     $ 128,300,000           $ 2,300,000        
Debt Instrument, Unamortized Discount                   2,400,000      
Interest rate     3.50%                    
Debt Instrument, Convertible, Conversion Ratio     94.0071                    
Convertible Debt Principal Amount Conversion     $ 1,000                    
Debt Instrument, Convertible, Conversion Price | $ / shares     $ 10.64                    
Convertible debt, equity portion     $ 46,700,000                    
Effective rate   2.40% 10.50%                    
Debt Issuance Costs, Net     $ 5,700,000                    
Percentage of conversion price of notes       130.00%                  
Percentage of trading price of notes       98.00%                  
Long-term debt       $ 0     0     122,400,000      
Interest Expense, Debt       0   $ 1,100,000 1,300,000 3,300,000          
Amortization of Debt Issuance Costs           100,000   400,000          
Amortization of Debt Discount (Premium)           2,000,000   5,800,000          
Gain (Loss) on Extinguishment of Debt   $ 5,400,000                      
Debt Instrument, Repurchase Amount   56,200,000                      
Debt Instrument, Repurchased Face Amount   45,200,000                      
Convertible Senior Notes due 2022 [Member] | Long-term Debt [Member]                          
Line of Credit Facility [Line Items]                          
Debt Issuance Costs, Gross     4,200,000                    
Debt Issuance Costs, Net       0     0     200,000      
proceedsfromconvertibledebtamountallocatedtodebtcomponent   50,600,000                      
Convertible Senior Notes due 2022 [Member] | Additional Paid-in Capital [Member]                          
Line of Credit Facility [Line Items]                          
Debt Issuance Costs, Gross     $ 1,500,000                    
proceedsfromconvertibledebtamountallocatedtoequitycomponent   5,400,000                      
Convertible Senior Notes due 2025 [Member]                          
Line of Credit Facility [Line Items]                          
Debt Instrument   143,800,000                      
Long-term Debt, Percentage Bearing Fixed Interest, Amount   $ 106,900,000             $ 28,800,000        
Debt Instrument, Unamortized Discount       0     0     29,800,000      
Interest rate   1.25%                      
Debt Instrument, Convertible, Conversion Ratio   107.1984                      
Convertible Debt Principal Amount Conversion   $ 1,000   $ 143,800,000     143,800,000     143,800,000      
Debt Instrument, Convertible, Conversion Price | $ / shares   $ 9.3285                      
Convertible debt, equity portion   $ 36,900,000                      
Effective rate   7.50%                      
Debt Issuance Costs, Net   $ 4,700,000                      
Percentage of conversion price of notes       130.00%                  
Percentage of trading price of notes       98.00%                  
Long-term debt       $ 140,800,000     140,800,000     111,300,000      
Interest Expense, Debt       400,000   400,000 1,300,000 1,300,000          
Amortization of Debt Issuance Costs       200,000   200,000 700,000 600,000          
Amortization of Debt Discount (Premium)       0   $ 1,600,000 0 $ 4,700,000          
Convertible Senior Notes due 2025 [Member] | Long-term Debt [Member]                          
Line of Credit Facility [Line Items]                          
Debt Issuance Costs, Gross   3,500,000                      
Debt Issuance Costs, Net       $ 3,000,000     $ 3,000,000     $ 2,700,000      
Convertible Senior Notes due 2025 [Member] | Additional Paid-in Capital [Member]                          
Line of Credit Facility [Line Items]                          
Debt Issuance Costs, Gross   1,200,000                      
Convertible Senior Notes due 2025 [Member] | Over-Allotment Option [Member]                          
Line of Credit Facility [Line Items]                          
Debt Instrument   $ 18,800,000                      
Minimum [Member] | 2021 Credit Facility [Member]                          
Line of Credit Facility [Line Items]                          
Unused Capacity, Commitment Fee Percentage 0.375%                        
Maximum [Member] | 2021 Credit Facility [Member]                          
Line of Credit Facility [Line Items]                          
Unused Capacity, Commitment Fee Percentage 0.50%                        
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | 2021 Credit Facility [Member]                          
Line of Credit Facility [Line Items]                          
Basis Spread on Variable Rate 1.50%                        
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | 2021 Credit Facility [Member]                          
Line of Credit Facility [Line Items]                          
Basis Spread on Variable Rate 2.00%                        
Base Rate [Member] | Minimum [Member] | 2021 Credit Facility [Member]                          
Line of Credit Facility [Line Items]                          
Basis Spread on Variable Rate 0.50%                        
Base Rate [Member] | Maximum [Member] | 2021 Credit Facility [Member]                          
Line of Credit Facility [Line Items]                          
Basis Spread on Variable Rate 1.00%