Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Related Party Transactions
Management fees	$ 1,039	$ 1,735
Western Asset Management Company
Related Party Transactions
Management fees (as a percent)	1.50%
Renewal term of management agreement	1 year
Notice period to terminate the Management Agreement following initial term	180 days
Multiple of average annual management fees used to calculate termination fee of management agreement	300.00%
Prior period over which management fees were incurred used to calculate the termination fee under the Management Agreement	24 months
Notice period to terminate the Management Agreement for cause	30 days
Management fees	$ 1,000	1,700
Reimbursable employee costs	221	$ 215
Management fees incurred but not yet paid	3,000		$ 2,000
Reimbursable employee costs incurred but not yet paid	$ 232		$ 181
Western Asset Management Company | Minimum
Related Party Transactions
Proportion of affirmative votes by the entity's independent directors to terminate the Management Agreement (as a percent)	67.00%
Proportion of votes required by the entity's independent directors for acceptance of reduction in management fees (as a percent)	67.00%