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Statements of Cash Flows (Tables)
 3 Months Ended
Mar. 31, 2021
Supplemental Cash Flow Information [Abstract]  
Schedule of Cash Flow, Supplemental Disclosures
 Quarter ended March 31,
($ in thousands)20212020
Cash paid during the period for:  
Interest$8,722 8,854 
Federal income tax— — 
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases2,226 2,130 
Operating cash flows from financing leases2 6 
Financing cash flows from finance leases115 142 
Non-cash items:
Corporate actions related to fixed income securities, AFS1
26,085 8,040 
Corporate actions related to fixed income securities, HTM1
— 2,596 
Assets acquired under finance lease arrangements183 29 
Assets acquired under operating lease arrangements16 3,828 
Non-cash purchase of property and equipment3 5 

1Examples of corporate actions include exchanges, non-cash acquisitions, and stock splits.
Schedule of Cash and Restricted Cash
($ in thousands)March 31, 2021December 31, 2020
Cash$488 394 
Restricted cash8,428 14,837 
Total cash and restricted cash shown in the Statements of Cash Flows$8,916 15,231