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Other Long-Term Liabilities (Tables)
 3 Months Ended
Mar. 31, 2020
Other Liabilities Disclosure [Abstract]  
Schedule of Other Long-Term Liabilities
Other long-term liabilities consisted of the following (in thousands):
March 31, 2020December 31, 2019
Deferred compensation plan $24,044  $30,361  
Supplemental executive retirement plan18,290  18,080  
Operating lease liabilities14,235  14,627  
Interest rate swap derivative instruments1,684  179  
Other long-term liabilities542  651  
Total Other long-term liabilities$58,795  $63,898