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Fair Value Measurements (Fair Values of the Company's Financial Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Forward Currency Contracts Liabilities $ 0 $ 200
Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurement 146,786 158,213
Recurring Basis | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swaps related to variable rate loans 5,084 6,048
Recurring Basis | Corporate bonds (due within 1 to 3 years)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate, agency and municipal bonds 11,603 14,931
Recurring Basis | Certificates of deposit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 4,600 4,600
Restricted short-term investments 2,200 2,200
Recurring Basis | Money market    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 123,064 130,199
Restricted cash 235 235
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurement 123,299 130,434
Level 1 | Money market    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 123,064 130,199
Restricted cash 235 235
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value measurement 23,487 27,779
Level 2 | Interest rate swaps    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swaps related to variable rate loans 5,084 6,048
Level 2 | Corporate bonds (due within 1 to 3 years)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Corporate, agency and municipal bonds 11,603 14,931
Level 2 | Certificates of deposit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term investments 4,600 4,600
Restricted short-term investments $ 2,200 $ 2,200