Fair Value Measures - Schedule of assets measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets:
Derivative assets	$ 0	$ 250
Liabilities:
Derivative liabilities	(104,530)	(28,081)
Fair Value, Recurring [Member]
Assets:
Derivative assets		250
Investment in Cole REITs	7,009	7,552
Total assets		7,802
Liabilities:
Derivative liabilities	(104,530)	(28,081)
Fair Value, Recurring [Member] | Level 1 [Member]
Assets:
Derivative assets		0
Investment in Cole REITs	0	0
Total assets		0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring [Member] | Level 2 [Member]
Assets:
Derivative assets		250
Investment in Cole REITs	0	0
Total assets		250
Liabilities:
Derivative liabilities	(104,530)	(28,081)
Fair Value, Recurring [Member] | Level 3 [Member]
Assets:
Derivative assets		0
Investment in Cole REITs	7,009	7,552
Total assets		7,552
Liabilities:
Derivative liabilities	$ 0	$ 0