Description of the Business and Summary of Significant Accounting Policies - Deferred Financing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest Expense, Debt [Abstract]
Amortization of deferred financing costs	$ 7,948	$ 7,662	$ 5,632
Write-off of deferred financing costs	281	3,079	1,956
Revolving Credit Facility [Member]
Interest Expense, Debt [Abstract]
Write-off of deferred financing costs	100	200	2,000
Interest Expense [Member]
Interest Expense, Debt [Abstract]
Write-off of deferred financing costs	$ 300	$ 3,100	$ 2,000