Basis of Presentation (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended
	Aug. 23, 2007	Jun. 21, 2005	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Senior unsecured notes due 2029, carrying value			$ 49,303	$ 49,254
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			23,900
Valuation allowance			23,900
Hallmark Statutory Trust I [Member]
Variable Interest Entity [Line Items]
Proceeds from issuance of trust preferred securities		$ 30,000
Hallmark Statutory Trust I I [Member]
Variable Interest Entity [Line Items]
Proceeds from issuance of trust preferred securities	$ 25,000
Senior unsecured notes due 2029 [Member]
Variable Interest Entity [Line Items]
Senior unsecured notes due 2029, carrying value			49,300
Senior unsecured notes due 2029, fair value			45,500
Subordinated Debt [Member]
Variable Interest Entity [Line Items]
Trust preferred securities, carrying value			56,000
Trust preferred securities, fair value			$ 33,700
Subordinated Debt [Member] | Hallmark Statutory Trust I [Member]
Variable Interest Entity [Line Items]
Payments to acquire trust preferred investments		$ 30,900
Subordinated Debt [Member] | Hallmark Statutory Trust I I [Member]
Variable Interest Entity [Line Items]
Payments to acquire trust preferred investments	$ 25,800