Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Deferred compensation plan	$ 24,044	$ 30,361
Supplemental executive retirement plan	18,290	18,080
Operating lease liabilities	14,235	14,627
Interest rate swap derivative instruments	1,684	179
Other long-term liabilities	542	651
Total Other long-term liabilities	$ 58,795	$ 63,898