Statutory Matters - Schedule of Statutory Accounting (Details) - UNITED STATES - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statutory Accounting Practices [Line Items]
Statutory net income	$ 3,586	$ 6,770	$ 31,881
Statutory capital and surplus	266,715	241,668	219,132
Minimum required statutory capital and surplus	$ 111,208	$ 24,850	$ 25,000