Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) Segment	Dec. 31, 2019 USD ($)
Description of Business [Abstract]
Number of reportable segments | Segment	1
ASU 2016-02 [Member]
Recently Adopted Accounting Pronouncements [Abstract]
Right-of-use asset	$ 94
Lease liability	94
ASU 2016-13 [Member]
Deductible Receivables [Abstract]
Allowance for credit losses, before tax		$ 15,000
Allowance for credit losses, net of tax		11,850
Recently Adopted Accounting Pronouncements [Abstract]
Cumulative effect adjustment to opening balance of retained earnings, net of tax		12,281
Commercial Mortgage Loans [Member]
Investments [Abstract]
Allowance for credit loss	$ 195
Retained Earnings [Member] | ASU 2016-13 [Member]
Recently Adopted Accounting Pronouncements [Abstract]
Cumulative effect adjustment to opening balance of retained earnings, before tax		15,545
Cumulative effect adjustment to opening balance of retained earnings, net of tax		$ 12,281