Commercial Loans - Schedule of Non-Performing Aging Commercial Loans (Details) - Commercial Loans $ in Thousands	Mar. 31, 2020 USD ($)
Noncontrolling Interest [Line Items]
No of Loans	11
Principal	$ 332,576
Fair value	$ 320,308
Financing Receivables, Current
Noncontrolling Interest [Line Items]
No of Loans	11
Principal	$ 332,576
Fair value	$ 320,308
Financial Asset, 1 to 29 Days Past Due
Noncontrolling Interest [Line Items]
No of Loans	0
Principal	$ 0
Fair value	$ 0
Financial Asset, 30 to 59 Days Past Due
Noncontrolling Interest [Line Items]
No of Loans	0
Principal	$ 0
Fair value	$ 0
Financial Asset, 60 to 89 Days Past Due
Noncontrolling Interest [Line Items]
No of Loans	0
Principal	$ 0
Fair value	$ 0
Financial Asset, Equal to or Greater than 90 Days Past Due
Noncontrolling Interest [Line Items]
No of Loans	0
Principal	$ 0
Fair value	$ 0