Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Deferred compensation plan	$ 30,361	$ 25,672
Supplemental executive retirement plan	18,080	15,035
Operating lease liabilities	14,627
Interest rate swap derivative instrument	179	0
Other long-term liabilities	651	4,161
Total Other long-term liabilities	$ 63,898	$ 44,868