Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transactions
Management fees	$ 5,937	$ 4,544	$ 7,354
Western Asset Management Company
Related Party Transactions
Management fees percentage	1.50%
Renewal term of management agreement period	1 year
Notice period to terminate the management agreement following initial term	180 days
Termination fee of management agreement	3
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	$ 5,900	4,500	7,400
Reimbursable employee costs	1,900	1,700	$ 1,600
Management fees incurred but not yet paid	1,500	3,000
Reimbursable employee costs incurred but not yet paid	$ 457	$ 148
Western Asset Management Company | Minimum
Related Party Transactions
Proportion of votes required by the entity's independent directors for acceptance of reduction in management fees percentage	67.00%
Proportion of affirmative votes by the entity's independent directors to terminate the management agreement percentage	67.00%