Employee Benefit Plans - Additional Information (Details)	9 Months Ended
	Sep. 30, 2020 USD ($) executive	Dec. 31, 2019 USD ($)
Retirement Benefits [Abstract]
Supplemental executive retirement plan	$ 18,712,000	$ 18,080,000
Employer contributions to benefit plans	0
Expected funding of the SERP in the current year	$ 0
Number of executives participating in SERP | executive	2