Amount of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

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Debt - Aggregate Principal Repayments on Mortgage Notes (Details) $ in Thousands	Dec. 31, 2019 USD ($) property	Jun. 06, 2019 USD ($)	Dec. 31, 2018 USD ($)	Apr. 12, 2018 USD ($) property
Debt Instrument [Line Items]
Number of Properties \| property	3,858
Mortgages [Member]
Debt Instrument [Line Items]
Mortgage note in default		$ 19,500		$ 16,200
Number of Properties \| property	355			1
2020	$ 188,385
2021	299,015
2022	289,451
2023	124,217
2024	621,021
Thereafter	6,968
Total	$ 1,529,057		$ 1,917,132