Fair Value Measurements and Financial Information - Measured on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets:
WSS Note	$ 8,847
Level 1
Assets:
WSS Note	0
Level 2
Assets:
WSS Note	8,847
Level 3
Assets:
WSS Note	0
Make-whole derivative
Assets:
Make-whole derivative	27,948
Make-whole derivative | Level 1
Assets:
Make-whole derivative	0
Make-whole derivative | Level 2
Assets:
Make-whole derivative	27,948
Make-whole derivative | Level 3
Assets:
Make-whole derivative	0
Interest rate derivative
Liabilities:
Interest rate derivative	(11,769)	$ (7,288)
Interest rate derivative | Level 1
Liabilities:
Interest rate derivative	0	0
Interest rate derivative | Level 2
Liabilities:
Interest rate derivative	11,769	(7,288)
Interest rate derivative | Level 3
Liabilities:
Interest rate derivative	$ 0	$ 0