Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred rent receivable	$ 38,335	$ 43,162
Initial direct costs	26,371	24,651
Internal-use software	16,747	17,708
Prepaid expense	7,675	7,090
Corporate furniture, fixtures and equipment	4,848	5,006
Deferred financing costs - revolving credit facility	9,098	5,677
Other	3,958	1,793
Total	101,082	102,290
Estimated amortization of deferred leasing costs
2020	10,926
2021	6,722
2022	3,337
2023	1,506
2024	1,247
Thereafter	2,633
Total	26,371
Revolving Credit Facility
Deferred financing costs - revolving credit facility	$ 3,148	$ 2,880