Fair Value Measurements - Effect of Interest Rate Swap (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Interest expense	$ 18,898	$ 13,030	$ 11,315
Derivative payments on interest rate swap	4,133	0	0
Loss on interest rate swap	11,669	0	$ 0
Interest Rate Swap
Derivative [Line Items]
Interest expense	$ 8,906	$ 1,411